Tobii X1 Light Eye Tracker User Manual

Download

www.tobii.com

User Manual

Tobii X1 Light Eye Tracker

Tobii X1 Light User Manual

Read this manual carefully before connecting and using the eye

tracker

Do not open the eye tracker

Non-compliance will result in loss of Warranty! There are no user serviceable components inside and the risk of electric shock is high due to the presence of Dangerous High Voltages. Contact Tobii support if your eye tracker is not working properly.

Epilepsy warning

Some people are susceptible to epileptic seizures or loss of consciousness when exposed to certain ﬂashing lights or light patterns in everyday life. Such people may have a seizure while watching certain images or patterns on a monitor. This may happen even if the person has no medical history of epilepsy or has never had any epileptic seizures.

Magnetic ﬁeld warning

The Tobii X1 Light Eye Tracker Mounting Bracket contains magnets. Magnetic ﬁelds may interfere with the function of cardiac pacemakers and implantable cardioverterdeﬁbrillators. As a general rule, maintain a minimum distance of 6 inches (15 centimeters) between any item with magnets and your heart device.

Declaration of Conformity

NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

• Reorient or relocate the receiving antenna.

• Increase the separation between the equipment and receiver.

• Connect the equipment into an outlet on a circuit different from that to which the receiver

is connected.

• Consult the dealer or an experienced radio/ TV technician for help

All Tobii Eye Trackers are CE-marked, indicating compliance with the essential health and safety requirements set out in European Directives.

Legal information

Tobii X1 Light Eye Tracker User Manual

This document contains information proprietary to Tobii Technology AB . The contents are conﬁdential and any disclosure to persons other than ofﬁcers, employees, agents or subcontractors of the owner or licensee of this document, without the prior written consent of Tobii Technology AB, is strictly prohibited. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic or mechanical, including photocopying and recording, without the prior consent of the copyright holder.

Manual release 1.2, February 2012

Tobii Technology AB reserves the right to change the content of this manual without any prior notice. Changes due to typographical errors, innacuracies or modiﬁcations in programs and/or equipment may be implemented at any time. Please check the Tobii web site www.tobii.com for updated versions of this document.

Contents

1 Parts and Brackets 7

1.1 The Tobii X1 Light Eye Tracker 7

1.2 Cables 7

1.3 Battery pack 8

1.4 Mounting brackets 8

1.4.1 VESA Mounting Bracket 8

1.4.2 Adhesive Mounting Bracket 8

1.4.3 Laptop Mounting Bracket 9

1.4.4 Desk Stand 9

2 Quick Start 10

2.1 VESA mounting bracket setup 10

2.1.1 Component checklist 11

2.2 Adhesive mounting bracket setup 11

2.2.1 Component checklist 12

2.3 Laptop mounting bracket setup 12

2.3.1 Component checklist 13

2.4 Desk stand or tripod setup 13

2.4.1 Component checklist 14

3 Product Care 15

3.1 Temperature & Humidity 15

3.1.1 General use 15

3.1.2 Transportation and storage 15

3.2 Cleaning 15

3.3 Transporting the Tobii X1 Light Eye Tracker 15

3.4 Disposing of the Tobii X1 Light Eye Tracker 16

4 Assembling the Tobii X1 Light Eye Tracker 17

4.1 The Tobii X1 Light Installation Guide 18

4.2 The Power supply and the battery pack 19

4.2.1 Assembling the power adaptor 19

4.2.2 Assembling the battery pack 20

4.3 Positioning 22

4.3.1 Track Box 23

4.4 Mounting the Tobii X1 Light using a VESA mounting bracket 24

4.4.1 The mounting process 25

4.5 Mounting the Tobii X1 Light using an adhesive mounting bracket 27

4.5.1 The mounting process 27

4.6 Mounting the Tobii X1 Light using a desk stand 29

4.6.1 The mounting process 29

4.7 Mounting the Tobii X1 Light using the laptop mounting bracket 30

4.7.1 The mounting process 30

5 The Conﬁguration Guide 32

6 The X Conﬁguration Tool 36

6.1 Accessing the X Conﬁguration Tool 36

6.2 Setting parameters in the X Conﬁguration Tool 37

6.3 Measuring the Active Display Area (D) 38

6.4 Reference point on the Tobii X1 Light 38

6.5 Measuring the distance to the display or calibration grid (B) 39

6.6 Measuring the vertical angle of the eye tracker (A) 39

6.7 Measuring the vertical angle of the display or calibration grid (C) 39

6.8 Measuring the height distance between the display and eye tracker (E) 39

6.9 Using a setup with side offset 40

6.10 Using a setup with angle offset 40

6.11 Saving the conﬁguration 40

7 Appendices 41

7.1 Appendix A: Eye tracking speciﬁcations 41

7.2 Appendix B: Technical speciﬁcations 43

7.3 Appendix C: Glossary 44

7.4 Appendix D: Software installed with the installation CD 46

7.5 Appendix E: Recommended display sizes 47

Tobii X1 Light User Manual

1 Parts and Brackets

1.1 The Tobii X1 Light Eye Tracker

1.2 Cables

Tobii X1 Light Front

Micro USB

Input

Power Adapter Input

IR Camera Cover

Tobii X1 Light Back

Magnetic

Mounting Points

Screw Holes for

Mounting Fixation

USB to Micro USB Cable

Power adaptor

Chapter 1 Parts and Brackets

Tobii X1 Light User Manual

1.3 Battery pack

1.4 Mounting brackets

1.4.1 VESA Mounting Bracket

The VESA Mounting Bracket is used to attach the Tobii X1 Light Eye Tracker to a monitor with a VESA mount. This solution can be removed and adjusted for different monitor sizes.

1.4.2 Adhesive Mounting Bracket

The Adhesive Mounting Bracket is used to attach the Tobii X1 Light Eye Tracker to a monitor. This solution is designed to be permantently attached to one monitor.

Battery charger

Battery

TEST

Lithium

Power Supply

MODEL: MDA08131482000US INPUT: 100-240V ~, 0.8A (MAX.) 50/60Hz OUTPUT: 17.20V 1.7A

LISTED

E255045

I.T.E POWER SUPPLY

RoHS

CAUTION

RISK OF ELECTRIC SHOCK

DO NOT OPEN

MADE IN CHINA

Chapter 1 Parts and Brackets

Tobii X1 Light User Manual

1.4.3 Laptop Mounting Bracket

The Laptop Mounting Bracket is used to attach the Tobii X1 Light Eye Tracker to a laptop.

1.4.4 Desk Stand

The Desk Stand is used when using the Tobii X1 Eye Tracker without a monitor or for setups where the other mounting brackets cannot be used. The Desk Stand can also be attached to a tripod.

Chapter 1 Parts and Brackets

Tobii X1 Light User Manual

2 Quick Start

Please note that Tobii X1 Light Eye Tracker hardware packages do contain screws that can be used for modifying the setup in one way or another. This means that there will be left over screws after the setup of the eye tracker is completed.

Do NOT connect the eye tracker before running the installation program!

2.1 VESA mounting bracket setup

1. Install the eye tracker software Insert the included CD and run the installation program. Read more on page 18.

2. Set the monitor on which the eye tracker is mounted as the Primary Display

in the Windows settings

In order for the calibration guide to work, the eye tracker needs to be attached to the primary display. Read more on page 19.

3. Shut down the computer

4. Mount the mounting bracket on the monitor Ensure the mounting bracket is securely fastened to the monitor before proceeding. Read more on page 24.

5. Attach the eye tracker to the mounting bracket The eye tracker should be mounted so the Tobii logo is the right way up. Read more on page 26

6. Connect the eye tracker to your computer Connect the Power adaptor or Battery pack and USB cable. Do not forget to remove the plastic protection ﬁlm from the eye tracker before ﬁrst use. Read more on page 26.

7. Turn on the computer

8. Run the Tobii X1 Light Eye Tracker Conﬁguration Guide Start the conﬁguration guide and follow the instructions on screen. Read more on page 32.

Chapter 2 Quick Start

Tobii X1 Light User Manual

9. Run your compatible eye tracking software Read more in the relevant software manual.

2.1.1 Component checklist

• Tobii X1 Light eye tracking unit

• Tobii VESA Mounting Bracket with necessary screws and spacers

•

• Tobii X1 Light Eye Tracker Resources CD

• Tobii Studio or other compatible eye tracking software

• Power adaptor

• USB to micro USB cable

2.2 Adhesive mounting bracket setup

1. Install the eye tracker software Insert the included CD and run the installation program. Read more on page 18.

2. Set the monitor on which the eye tracker is mounted as the Primary Display

in the Windows settings

In order for the calibration guide to work, the eye tracker needs to be attached to the primary display. Read more on page 19.

3. Shut down the computer

4. Connect the eye tracker to your computer Connect the Power adaptor or Battery pack and USB cable. Do not forget to remove the plastic protection ﬁlm from the eye tracker before ﬁrst use. Read more on page 27.

5. Turn on the computer

Run the Tobii X1 Light Eye Tracker Conﬁguration Guide

Start the conﬁguration guide and follow the instructions on screen. Read more on page 32.

Chapter 2 Quick Start

Tobii X1 Light User Manual

6. Mount the adhesive mounting bracket on the monitor Ensure the adhesive mounting bracket is securely fastened to the monitor before proceeding. Read more on page 27.

7. Attach the eye tracker to the adhesive mounting bracket The eye tracker should be mounted so the Tobii logo is the right way up. Read more on page 28

8. Run your compatible eye tracking software Read more in the relevant software manual.

2.2.1 Component checklist

• Tobii X1 Light eye tracking unit

• Tobii Adhesive Mounting Bracket

• Tobii X1 Light Eye Tracker Resources CD

• Tobii Studio or other compatible eye tracking software

• Power adaptor

• USB to micro USB cable

2.3 Laptop mounting bracket setup

1. Install the eye tracker software Insert the included CD and run the installation program. Read more on page 18.

2. Shut down the computer

3. Mount the laptop mounting bracket on the monitor Ensure the mounting bracket is securely fastened to the monitor before proceeding. Read more on page 30

Chapter 2 Quick Start

Tobii X1 Light User Manual

on page 29.

5. Turn on the computer

6. Run the X Conﬁguration Tool Open the Eye Tracker Browser in the folder

Windows Start > All Programs > Tobii. Select the Tobii X1 Light Eye Tracker in the list of connected eye trackers and click the Conﬁg Tool button.

Read more on page 36.

8. Do the required measurements and enter them in the conﬁguration tool Read more on page 37.

9. Run your compatible eye tracking software Read more in the relevant software manual.

2.4.1 Component checklist

• Tobii X1 Light eye tracking unit

• Tobii Desk Stand for Tobii X1 Light Eye Tracker including the necessary

screws and/or a compatible tripod

• Tobii X1 Light Eye Tracker Resources CD

• Tobii Studio or other compatible eye tracking software

• Power adaptor

• USB to micro USB cable

Chapter 2 Quick Start

Tobii X1 Light User Manual

3 Product Care

3.1 Temperature & Humidity

3.1.1 General use

The Tobii X1 Light Eye Tracker is best kept in dry conditions at room temperature. The recommended range for temperature and the humidity value for the device is as follows:

• Temperature: 0°C to 40°C (32°F to 104°F)

• Humidity: Max 70% (no condensation on the device)

3.1.2 Transportation and storage

For transportation and storage, the recommended range for temperature and the humidity value for the device is as follows:

• Temperature: -40°C to 70°C (-40°F to 158°F)

• Humidity: 20% to 70% (no condensation on the device)

The Tobii X1 Light Eye Tracker is not waterproof or water resistant. The device should not be kept in excessively humid, damp or wet conditions. Do not submerge the device in water or in any other liquid. Be careful not to allow liquids to be spilled upon the device.

3.2 Cleaning

Before cleaning the Tobii X1 Light Eye Tracker device shut down the computer to which it is attached and unplug all cables. Use a soft, slightly damp, lint-free cloth. Avoid getting moisture in openings on the device. Don’t use window cleaners, household cleaners, aerosol sprays, solvents, alcohol, ammonia, or abrasives to clean the device.

3.3 Transporting the Tobii X1 Light Eye Tracker

Disconnect all the cables and use the included carrying case.

When you transport the device for repair, shipment or traveling, use the original casing and packaging materials.

Chapter 3 Product Care

Tobii X1 Light User Manual

If you have attached the Tobii X1 Light Eye Tracker to a monitor using the Mounting Bracket, do not carry the connected devices by solely gripping the Tobii X1 Light Eye Tracker or the Mounting Bracket. The VESA mount attachment points may not hold the weight of the computer monitor, and the devices could break apart and fall, or topple and fall because of misbalanced weight, causing permanent damage to both. Tobii Technology will not be held liable for the resulting damage.

3.4 Disposing of the Tobii X1 Light Eye Tracker

Do not dispose of the Tobii X1 Light Eye Tracker in general household or ofﬁce waste. Follow your local regulations for the disposal of electrical and electronic equipment.

Chapter 3 Product Care

Tobii X1 Light User Manual

4 Assembling the Tobii X1 Light Eye Tracker

To be able to use the Tobii X1 Light Eye Tracker, you must ﬁrst install the necessary software and drivers from the included CD, assemble the mounting equipment for the eye tracker and attach it properly to your Tobii X1 Light Eye Tracker.

Do NOT connect the Tobii X1 Light Eye Tracker before the installation software has been run. Connecting the eye tracker prematurely can lead to software compability issues as the wrong drivers may then automatically be installed by Windows.

The Tobii X1 Light Eye Tracker ONLY works with PC computers running a Windows operating system (Windows XP and later). It is optimized for Desktop PC use with an external monitor. If you use it without attaching it to a monitor using a VESA mounting bracket or adhesive mounting bracket, extra care needs to be taken to perform the setup correctly for the eye tracker to perform optimally.

Chapter 4 Assembling the Tobii X1 Light Eye Tracker

Tobii X1 Light User Manual

4.1 The Tobii X1 Light Installation Guide

The Tobii X1 Light Eye Tracker Installation Guide will guide you through the installation of the necessary software and drivers for the Tobii X1 Light Eye Tracker, provide Licensing information and show what monitor is currently set as the primary monitor in the Windows Display settings. (To be able to use the Tobii X1 Light Eye Tracker Conﬁguration Guide when having it mounted using the mounting brackets, the monitor on which the eye tracker is mounted must be the primary monitor according to the Windows Display settings.)

1. Insert the included CD into your computer’s CD/DVD Disk Drive. The Installation Guide will open automatically.

2. Follow the instructions within the Installation Guide, selecting Next to proceed.

Chapter 4 Assembling the Tobii X1 Light Eye Tracker

Tobii X1 Light User Manual

Once the Installation Guide is ﬁnished, you need to power off your computer to mount the Tobii X1 Light Eye Tracker on a mounting device such as the mounting brackets or a desk stand, and to connect the cables between the Tobii X1 Light Eye Tracker and your computer.

3. Eject the CD and power off your computer by selecting Shut down on the Finalize page of the Installation Guide.

If the installation guide did not run on the monitor on which the eye tracker will be mounted and you are planning to use a VESA mounting bracket or adhesive mounting bracket, it is highly recommended that the Windows display settings are changed before restarting the computer. If this is not done, it is not possible to use the simplﬁed setup conﬁguration available through the Tobii X1 Light Conﬁgruation guide. Setting the primary displa is done by clicking Start -> Control Panel -> Appearance and Personalization -> Display -> Adjust resolution, click on the monitor that the eye tracker will be attached to, mark the tick-box labelled “Make this my main display” and then click on the “Apply” button.

4.2 The Power supply and the battery pack

Before ﬁrst time use, the power adaptor or battery pack needs to be assembled, and if the battery pack is used, the correct voltage has to be set.

4.2.1 Assembling the power adaptor

In order for the power adaptor to be compatible with various power sockets, it is delivered with a set of interchangeable plugs. Once the appropriate plug has been selected, it should be attached to the power adapter by pushing the plug down and towards the cable end of the power adapter in the hole designed for that purpose (see image below). Once this is done, the power adaptor is ready for use.

Chapter 4 Assembling the Tobii X1 Light Eye Tracker

Tobii X1 Light User Manual

4.2.2 Assembling the battery pack

The battery pack consists of two parts: the battery pack and the charger/power supply. The charger only requires the appropriate power cord to be attached (see image below).

The battery pack ﬁrst needs to be set to deliver the correct voltage. This is done by turning the battery pack so the black, bottom side is visible. At the bottom of the battery pack is a switch that can be set to either 9V or 12 V. This switch should be set to 12V in order for the eye tracker to work (see image below).

Power Supply

MODEL: MDA08131482000US INPUT: 100-240V ~, 0.8A (MAX.) 50/60Hz OUTPUT: 17.20V 1.7A

LISTED

E255045

I.T.E POWER SUPPLY

RoHS

CAUTION

RISK OF ELECTRIC SHOCK

DO NOT OPEN

MADE IN CHINA

PM66-DC

RECHARGEABLE LITHIUM ION BATTERY PACK

9V/12V(2.5A Max) 66Wh

CAUTION: Do not incinerated, disassemble, short heat above 176 F. Use designated charger only.

MADE IN CHINA

12V 9V

Chapter 4 Assembling the Tobii X1 Light Eye Tracker

Tobii X1 Light User Manual

The second step in preparing the battery pack for use is to select the correct universal connector. The connector that should be used is the connector with the letter ‘N’ on it (see image below).

Before the battrery pack is used it needs to be charged. To charge the battery pack, connect the charger to a power socket and ensure that the diode on the charger is lit up before connecting the charger to the battery pack. If the diode on the charger is not lit, the charger does not provide any charging. Common reasons for the diode not being lit is that the power cord is not properly connected either to the charger or to the power socket. When charging the diode will be red. When the charging is completed it will turn green.

Once charging has been completed, the built-in power meter (seen in the top right corner of the battery unit in the image above) can be used to control the current power level of the battery. When pressing the ‘TEST’ button on the battery pack, the diodes in the power meter lights up. When fully charged, the top four lights will be lit.

TEST

Lithium

Chapter 4 Assembling the Tobii X1 Light Eye Tracker

Tobii X1 Light User Manual

4.3 Positioning

The distance from the person’s eyes to the eye tracker should be approximately ~65 cm (26’’). However, the eye tracker can still track eye movements as long as

the person in front of the eye tracker stays within 50 to 80 cm distance from the eye tracker. If the eye tracker is too close or too far away from the test subject there is a risk of losing some of the gaze data.

When the Tobii X1 Light Eye Tracker is used in a setup where any of the brackets are not used, it should be placed below the monitor (or below the surface that is to be studied) without covering the bottom of the display area for the person watching the stimuli.

For optimal tracking the eye tracker should be placed so that the gaze angle will not exceed ~27º to any point on the display area (or other stimuli used) (see images below).

Max 27°

65 cm 26’’

It is very important to have the correct distance to the monitor, or the tracked

object. Otherwise the eye tracker cannot track the entire area. If the monitor or object is placed too close to the participant there is a risk that the gaze data for the corners of the display area of the monitor will not be collected (see image to the left).

Max

27°

Max 27°

Max

27°

Chapter 4 Assembling the Tobii X1 Light Eye Tracker

Tobii X1 Light User Manual

The correct distance can be calculated by

using basic trigonometry (see image to the left). By assuming that the tracked area is a half circle and that the diagonal from the center of the screen or other stimuli to its top corner constitutes the radius of that half circle, it is possible to calculate the distance needed between the participant and the stimuli using the following formula:

d =

As an example, a monitor with a diagonal from the centre of 38 cm / 13.8 in. would mean placing the participant approximately 75 cm / 29.5 in. from the monitor. For recommended display sizes that can be used with the supplied mounts, please refer to chapter 7.5 Appendix E: Recommended display sizes on page 47. The eye tracker should always be placed approximately 65 cm / 25.6 in. from the participant.

4.3.1 Track Box

The Tobii X1 Light Eye Tracker allows for extensive head movement. Once the Tobii X1 Light Eye Tracker / Computer is properly calibrated and placed in front of the user, no further adjustments are required.

The Tobii X1 Light Eye Tracker allows for head movements of 44 cm x 32 cm / 17.3 in. x 12.6 in. (Width x Height) at the distance of 65 cm / 25.6 in. from the eye tracker. Depending on factors such as droopy eyelids, visual aids and other characteristics of the eye, the optimal distance between the person being tracked and the eye tracker varies. Typical tracking distance limits are 55 to 80 cm / 21.7 to 31.5 in. from the center of the eye tracker.

In order to be tracked properly, the person to be eye tracked needs at least one eye in the track box at all times.

27°

s = Diagonal of the screen or other stimuli from the bottom center

d = Distance to screen or other stimuli

tan(27º)

Chapter 4 Assembling the Tobii X1 Light Eye Tracker

Tobii X1 Light User Manual

Free VESA NOT Free VESA

10cm /

3.94 in

10cm /

3.94 in

4.4 Mounting the Tobii X1 Light using a VESA mounting bracket

It is highly recommended that the mounting bracket is only used with “ﬂat screen” monitors that have a free VESA mounting system (10 cm / 3.94 in. x 10 cm / 3.94 in. or 7.5 cm / 2.95 in. x 7.5 cm / 2.95 in. free mounting holes). This is because mounting the bracket between the screen and the monitor stand can be very difﬁcult depending on the design of the monitor stand. In addition, as the thickness of monitor stand back plates varies, the supplied screws are not guaranteed to be long enough to work with such a setup.

Be sure that the mounting bracket system does not cover the fan of the monitor onto which it is being mounted. If the fan is covered, the monitor could overheat causing an increased risk for ﬁre and burns. Use a monitor with a fan that is not covered by the mounting bracket.

If the distance between the front of the screen and the eye tracker appears to be too large, use the spacers to regulate this distance. The spacers can be combined to achieve the desired distance.

If the eye tracker will be mounted below the screen, the supplied spacers in the Spacer Kit and longer screws found in the Alternative Mounting Kit need to be used in order to place the eye tracker in the correct position. The spacers and longer screws are also necessary if mounting the VESA mounting bracket between the monitor stand.

Chapter 4 Assembling the Tobii X1 Light Eye Tracker

Tobii X1 Light User Manual

If your VESA mounting screw holes are recessed on your monitor or if the back of the monitor is curved, use the short spacers and the longer screws supplied in the Alternative Mounting Kit.

• Mount the spacers between the screw holes on the monitor and the VESA mounting bracket to ﬁll out the gap made by the recession or compensate for the distance differences caused by the curvation..

• Use the longer screws to mount the bracket to the monitor.

Use only the supplied screws to mount the Tobii X1 Light Eye Tracker to the VESA mount of the appropriate monitor type (only use the longer screws from the Alternative Mounting Kit if you are also using the spacers on a recessed VESA; without the spacers you could possibly screw in the screws too far causing damage to the monitor).

4.4.1 The mounting process

1. Slide the mounting bracket onto the screen from the side and fasten the screws through the holes on the mounting bracket and in the VESA mounting screw holes at the back of the monitor.

2. When fastening the mounting bracket to the VESA mount of your monitor do not overtighten the screws. Tighten until you encounter resistance. Overtightening may increase risk for breakage and will not improve functionality. First, screw one screw in lightly, then a second, lightly, following an X formation. Tighten the third screw lightly, then the fourth, also following an X formation. Then, ﬁnish tightening them all in the same pattern.

Chapter 4 Assembling the Tobii X1 Light Eye Tracker

Tobii X1 Light User Manual

3. Attach the Tobii X1 Light Eye Tracker to the mounting bracket by placing the round imprints on the eye tracker over the round magnets on the bracket.

Ensure that the Tobii logo on the eye tracker is the right way up before using the eye tracker.

4. After you have mounted the Tobii X1 Light Eye Tracker system properly and attached the power source to an outlet and the USB connector to your computer, restart your computer.

When your computer reboots the ﬁrst time after the installation ﬁle has been run, the Tobii X1 Light Eye Tracker Conﬁguration Guide will open automatically. The conﬁguration guide can then be accessed within the Tobii/Tobii X1 Light Eye Tracker folder in the Start menu. Follow the instructions in the conﬁguration guide to conﬁgure the eye tracker.

If you don’t plan to use your Tobii X1 Light Eye Tracker as a portable eye tracking unit and move it between different computers with the appropriate mounting bracket, you can afﬁx the Tobii X1 Light Eye Tracker to the mounting bracket with the 2 M4 “regular head” Torx screws that are included to achive better stability (see image).

Chapter 4 Assembling the Tobii X1 Light Eye Tracker

Tobii X1 Light User Manual

4.5 Mounting the Tobii X1 Light using an adhesive mounting bracket

The adhesive mounting bracket is designed to be permanently attached to the monitor using adhesive or double sided tape. It contains magnets, but these are only to be used as an aid when positioning the bracket and to keep it in place while the adhesive cures. If the bracket is not properly fastened, the eye tracker can fall off the monitor and break.

The double sided tape supplied with the adhesive mounting bracket is designed to permanently attach the bracket to the monitor. Attempting to remove the bracket after attaching it using the supplied tape can result in damages both to the monitor and the bracket.

It is possible to use the adhesive mounting bracket in scene camera setups. However, it is not advisable to use the supplied adhesive tape in those cases. Instead, some kind of adhesive that can ensure the mounting bracket is securely fastened to the surface during the study but then can be removed should be used.

Before starting the assembly, ensure that all necessary parts are available, i.e. the adhesive mounting bracket and, if necessary, additional adhesive/double sided tape.

4.5.1 The mounting process

Run the installation program that can be found on the CD. After shutting down the computer, connect the USB cable between the eye tracker and the computer and the power cable between the eye tracker and the power socket. Do NOT mount the bracket before the appropriate step for doing so in the Tobii X1 Light Eye Tracker Conﬁguration Guide.

When your computer reboots the ﬁrst time after the installation program has been run, the Tobii X1 Light Eye Tracker Conﬁguration Guide will open automatically. The conﬁguration guide can after that be accessed within the Tobii/Tobii X1 Light Eye Tracker folder in the Start menu. Follow the instructions in the conﬁguration guide to conﬁgure the eye tracker.

Start the computer and follow the instructions in the conﬁguration guide. When selecting which setup to use, select the Adhesive Mounting Bracket option. Ensure

Chapter 4 Assembling the Tobii X1 Light Eye Tracker

Tobii X1 Light User Manual

that the bracket is ready for mounting, i.e. that the cover is removed from the double sided tape or additional adhesive is applied to the back of the bracket and that the area on the monitor on which the adhesive mounting bracket will be mounted has been wiped clean.

Follow the instructions in the program on how to align the bracket. Align the white line found on the lower orange border of the conﬁguration program with the middle line found at the top of the bracket (see image below). When positioned in its proper place and after having removed the plastic protection from the adhesive tape, press ﬁrmly on the bracket for about a minute. By pressing on the bracket after attaching it, the adhesive tape gets a chance to cure, which reduces the risk of the bracket and eye tracker falling off the monitor.

Attach the Tobii X1 Light Eye Tracker to the mounting bracket by placing the round inprints in the eye tracker over the round magnets on the bracket. If the black metal adapter is attached to the back of the eye tracker, this has to be removed ﬁrst.

After you have mounted the Tobii X1 Light Eye Tracker properly and attached the power source to an outlet and the USB connector to your computer, restart your computer.

Chapter 4 Assembling the Tobii X1 Light Eye Tracker

Tobii X1 Light User Manual

4.6 Mounting the Tobii X1 Light using a desk stand

The desk stand can either be used on its own by positioning it with the eye tracker attached on a ﬂat surface in front of the object or monitor that is to be eye tracked or by attaching it to a tripod. Attaching it on a tripad enables use of the eye tracker when the person being eye tracked is standing up or if there is no ﬂat surface of a suitable height available between the person and the object the person is supposed to look at while being eye tracked.

It is generally beneﬁcial to use a tripod with built in spirit levels as it is important that the top edge of the eye tracker has approximately the same angle in relation to the ground as the bottom of the area that is to be tracked. As the bottom edge of the tracked area generally is horizontal, a spirit level can simplify the physical conﬁguration of the eye tracker.

Before starting the assembly, ensure that all necessary parts are available, i.e. the desk stand, screws, digital angle gauge, measuring tape and, if needed, a tripod. Also perform the necessary calculations regarding at what distance the eye tracker needs to be placed from the monitor or other object that is going to be studied.

4.6.1 The mounting process

Run the installation program that can be found on the CD.

Attach the desk stand to the back of the eye tracker using the supplied screws. If the black metal adapter is attached to the back of the eye tracker this has to be removed ﬁrst. Place the eye tracker at the correct distance from the surface that is going to be eye tracked.

If using a tripod, attach it either to the hole at the back or underneath the desk stand.

After you have mounted the Tobii X1 Light Eye Tracker system properly and attached the power source to an outlet and attached the USB connector to your computer, restart your computer.

Chapter 4 Assembling the Tobii X1 Light Eye Tracker

Tobii X1 Light User Manual

To complete the setup, enter the relevant measurements into the X Conﬁguration Tool (see chapter 6 The X Conﬁguration Tool on page 36 on how to do this). The angle of the eye tracker is 22° if the desk stand is placed on a horizontal surface. If the desk stand is attached to a tripod the angle depends on the adjustments of the tripod.

4.7 Mounting the Tobii X1 Light using the laptop mounting bracket

The laptop mounting bracket is used to attach the Tobii X1 Light Eye Tracker to a laptop.

The display size of the laptop must not exceed the recommended display sizes as discussed in the Adhesive Mounting Bracket column in section 7.5 Appendix E: Recommended display sizes on page 47. If larger displays are used, there is a high risk that parts of the display will not be tracked.

Before starting the assembly, ensure that all necessary parts are available, i.e. the laptop mounting bracket, digital angle gauge and measurement tape.

4.7.1 The mounting process

Run the installation program that can be found on the CD.

1. Attach the laptop mounting bracket to the back of the eye tracker using the supplied screws. If the black metal adapter is attached to the back of the eye tracker this has to be removed ﬁrst.

2. Loosen the hand screws at the back of the laptop mounting bracket and slide the laptop mounting bracket onto the laptop. Once the bracket is in place, tighten the hand screws on the back of the mounting bracket to secure it to the laptop monitor.

Chapter 4 Assembling the Tobii X1 Light Eye Tracker

Tobii X1 Light User Manual

3. Place the eye tracker so the top of the eye tracker aligns with the bottom of the display when looking at the display from a normal user position.

When the eye tracker is placed in the proper position according to the instructions above, tighten the hand screws on the laptop mounting ﬁxture and ensure that any movement of the display will not affect the geometric relation between the display and the eye tracker.

4. After you have mounted the Tobii X1 Light Eye Tracker system properly and attached the power source to an outlet and attached the USB connector to your computer, restart your computer.

To complete the setup, enter the relevant measurements into the X Conﬁguration Tool (see chapter 6 The X Conﬁguration Tool on page 36 for instructions on how to do this). Pay special attention to the measurements of the display and eye tracker angles as these have a vital impact on the accuracy of the eye tracking data.

Do not tighten the hand screws at the back of the mounting bracket too tight as that can damage the laptop monitor.

Chapter 4 Assembling the Tobii X1 Light Eye Tracker

Tobii X1 Light User Manual

5 The Conﬁguration Guide

Upon restarting your computer after running the Tobii X1 Light Eye Tracker Installation Guide, mounting the mounting bracket or adhesive mounting bracket and Tobii X1 Light Eye Tracker to your monitor and connecting the power and USB cables, the Tobii X1 Light Eye Tracker Conﬁguration Guide will automatically start.

This guide is designed to simplify the conﬁguration of the eye tracker when either the monitor- or adhesive mounting bracket is used. When any other setup is used, the X Conﬁguration Tool should be used instead. (The X Conﬁguration Tool can be launched from within the Conﬁguration Guide, from within the Tobii Eye Tracker Browser found in the Tobii folder in the Start menu or from the eye tracker browser found in Tobii Studio.)

The dimensions of screens differ in terms of thickness as well as the position of the VESA mount on the back of the screen. Because of this, certain assumptions regarding these measurement have been made in the Coﬁguration Guide software. This means that it will not be able to provide conﬁgurations that give optimal accuracy and precision for all screens. To achieve optimal accuracy and precision, the X Conﬁguration Tool must be used.

Chapter 5 The Conﬁguration Guide

Tobii X1 Light User Manual

Follow the instructions on each page of the Conﬁguration Guide, select Next to move to the next page of the Guide.

Pay particular attention to the Display Area page and the Calibration page of the Conﬁguration Guide. In both cases you must complete the information input, or tasks, requested before you are able to continue to the next step.

On the Display Area page be sure to measure the actual blue lines making up the triangle on the display with a ruler and ﬁll in the numbers in the spaces provided. A ruler can be found on the last page of this manual.

Do not attempt to measure the physical display area size of your screen. The numbers of the measured lines from the triangle will be extrapolated into the size of the physical display area by the software.

Chapter 5 The Conﬁguration Guide

Tobii X1 Light User Manual

On the Calibration page, you must calibrate before moving on to the next page. Follow the instructions and select Calibrate. Without calibration you will be unable to ﬁnish the Conﬁguration Guide and eye tracking will not work properly.

After calibration, you may want to improve one or more points.

There is a color scheme used that will help you to understand the quality of your calibration.

• If the background color of the Calibration Result is light red, you have achieved a relatively low quality calibration. You can improve one or more points individually, or recalibrate completely, to achieve better eye tracking results.

Chapter 5 The Conﬁguration Guide

Tobii X1 Light User Manual

• If the background color of the Calibration Result is light yellow, you have achieved a medium quality calibration. You might be able achieve better eye tracking results by improving one or more points individually.

• If the background color of the Calibration Result is green, you have achieved a high quality calibration.

The closer the lines within the calibration point are to a dot in the center of the circle of the calibration point, the better the calibration is of that point,

.You can choose the points to be improved and calibrate only those points again. Improve one or more calibration points by:

1. Under Calibration Result marking the point(s) you want to improve.

2. Clicking Improve Point(s) and a calibration for the selected point(s) will start.

The quality of the calibration can depend on several different things. If the background color is red and the lines are long, it can indicate that there is something wrong with the setup, e.g. that the Display Area measurements were faulty. Other things that can inﬂuence the calibration results are scratches or smudges on glasses or interferences from surrounding light sources. By cleaning the glasses or ensuring that the eye tracker or the person in front of the eye tracker is not facing a light source that emits near infrared light (e.g. the sun) the calibration results can often be improved.

Be aware that no matter what quality of calibration you have achieved you will be able to select OK or Apply and begin using the eye tracker. It is the accuracy and functionality of the eye tracker that is affected by the quality of the calibration results. Try for the best calibration possible before proceeding.

Select Finish on the ﬁnal page of the Conﬁguration Guide and your settings and conﬁgurations will be saved for future use.

Chapter 5 The Conﬁguration Guide

Tobii X1 Light User Manual

6 The X Conﬁguration Tool

The X Conﬁguration Tool is a general software used by all Tobii X Series Eye Trackers for conﬁguring the parameters necessary in order for accurate eye tracking to be possible.

The tool allows for any kind of eye tracker setup, but requires more measurements than when using the Tobii X1 Light Eye Tracker Conﬁguration Guide. The X Conﬁguration Tool must be used for all setups where either the Desk Stand or Laptop Mounting Bracket is used. It is also necessary to use the X Conﬁguration Tool when using the eye tracker in setups where the Tobii X1 Light Eye Tracker Conﬁguration Guide cannot be displayed on the screen on which the eye tracker is mounted.

6.1 Accessing the X Conﬁguration Tool

The X Conﬁguration Tool is installed when running the Installation Guide for the Tobii X1 Light Eye Tracker. It is also installed when installing Tobii Eye Tracking tools or when installing Tobii Studio.

The tool is available from the Eye Tracker browser, which can be found in the folder Windows Start menu > All Programs > Tobii if Tobii Eye Tracking tools are installed. To launch the X Conﬁguration Tool from the Eye Tracker browser, click on the eye tracker that should be conﬁgured in the list and then on the X Conﬁg Tool... button.

Chapter 6 The X Conﬁguration Tool

Tobii X1 Light User Manual

6.2 Setting parameters in the X Conﬁguration Tool

When using the Tobii X1 Light Eye Tracker without a mounting bracket or list, the user must specify all the positioning parameters in the X Conﬁguration Tool. These are:

• Eye tracker angle

• Distance to the display

• Display angle

• Active Display Area

• Height difference between lowest row of pixels on the display and the eye

tracker

Please be as careful and precise as possible when measuring the required parameters in your setup. All parameters can have both positive and negative values. The values can be added both as centimeters and inches. How to set up the different parameters will be described on the following pages.

Chapter 6 The X Conﬁguration Tool

Tobii X1 Light User Manual

6.3 Measuring the Active Display Area (D)

The correct display or stimuli size must always be added in the X Conﬁguration Tool. For computer monitors, televisions and other displays, measure the size of the visible active area on the monitor, where you can see the actual image (see the image below to the left).

For projected displays, measure the size of the visible projection on the display (see the image below to the right). In a setup where the stimuli is ﬁlmed by a scene camera the active display area must be calculated based on the calibration grid size.

6.4 Reference point on the Tobii X1 Light

All distance measurements should ideally be made from speciﬁc points on the rear of the eye tracker. As the eye tracker is symmetrical, it is possible to measure from two locations on the eye tracker: the heads of the two screws located on the lower left and right corners on the back of the eye tracker (see image below). These points remain relatively constant even if the angle of the eye tracker is changed.

Chapter 6 The X Conﬁguration Tool

Tobii X1 Light User Manual

6.5 Measuring the distance to the display or calibration grid (B)

Measure the distance from the measuring point on the Tobii X1 Light Eye Tracker to the front of the active display on the monitor, projection screen, or TV screen, or in a scene camera setup to the virtual screen. If the measuring point on the eye tracker is located behind the active display, enter a negative distance (use “-” in front of the value).

Always make sure that the distance to the active display is long enough for the eye tracker to track the entire area. Please read chapter 3.4 Positioning and 6.2 Appendix 2: Recommended display sizes for more information.

6.6 Measuring the vertical angle of the eye tracker (A)

Calibrate the digital angle gauge supplied with the Tobii X1 Light Eye Tracker before measuring the angle between the eye tracker and the vertical plane. To calibrate the digital angle gauge, place it on a ﬂat, vertical surface and press the “Zero” button.

To measure the angle, place the digital angle gauge on front surface of the eye tracker. In many setups the angle is commonly around 25 degrees.

6.7 Measuring the vertical angle of the display or calibration grid (C)

Measure the angle between the vertical plane and the active display. In a scene camera setup measure the angle between the vertical plane and the calibration grid used.

If the display is tilted forward you should enter a negative angle (use “-” in front of the value). If the active display is completely vertical the angle value is 0. In a scene camera setup where you want to track objects on a horizontal table the angle would be 90 degrees.

6.8 Measuring the height distance between the display and eye tracker (E)

Measure the height difference between the measuring point on the eye tracker and the bottom of the active display area. Always use the visible active display as described in the chapter 6.3 Measuring the Active Display Area (D) on page 38.

Chapter 6 The X Conﬁguration Tool

Tobii X1 Light User Manual

If the active display is located below the measuring point on the eye tracker, for example, in a projector setup, the value will be negative. Enter the value in the X Conﬁguration Tool with a “-” in front to signify it as a negative value.

6.9 Using a setup with side offset

If the Eye Tracker is not placed right in front of the screen with the axis horizontally aligned, an offset can be entered in the X Conﬁguration Tool (called Side offset).

In this case check the Use Side Offset check box and enter the side offset from the center of the active display to the center of the eye tracker, enter a negative value if the eye tracker is located to the left of the center as seen from the front.

6.10 Using a setup with angle offset

The eye tracker should be placed parallel with the display or tracked object. If this is not the case you should check the Use Rotation check box and enter the angle between the back of the eye tracker and the active display. If the eye tracker is rotated clockwise, enter a negative angle.

6.11 Saving the conﬁguration

When using different setups it is useful to save the different conﬁgurations locally on your computer. This gives you the possibility to go back and reuse the conﬁguration for the speciﬁc setup. The ﬁle can also be used as a local backup for your conﬁguration in case the settings need to be adjusted later.

Conﬁgurations can be saved and loaded in the Conﬁguration tool. Click Save To File to save the conﬁguration as an .xcfg ﬁle locally on your computer.

Click Load from File to load a saved .xcfg conﬁguration.

To start using the conﬁguration entered in the tool you must click Save to Eyetracker. The parameters will then be sent to the eye tracker and the eye tracker will immediately be properly conﬁgured. When any parameter in the tool is changed the button must be pressed again for the eye tracker to get the new settings.

Chapter 6 The X Conﬁguration Tool

Tobii X1 Light User Manual

7 Appendices

7.1 Appendix A: Eye tracking speciﬁcations

The characteristics of an eye tracker can be described in terms of gaze accuracy and gaze precision. Accuracy describes the angular average distance from the actual gaze point to the one measured by the eye tracker. Gaze precision describes the spatial variation between successive samples collected when the subject ﬁxates at a speciﬁc point on stimuli. More information regarding the accuracy and precision measurements can be found in the document Accuracy and precision test method for remote eye trackers, which can be downloaded from the Tobii website. A glossary can be found in 6.3 Appendix C: Glossary.

Gaze accuracy

Monocular Binocular

At ideal conditions

0.5° 0.5°

At 25° gaze angle 0.4° 0.3°

At 30° gaze angle 0.4° 0.3°

At 1 lux 1.4° 0.9°

At 300 lux 0.5° 0.5°

At 600 lux 0.8° 0.5°

At 1000 lux 0.9° 0.5°

White stimuli background (300 lux) 0.5° 0.5°

Accuracy under ideal conditions is measured in the center of the head movement box with the subject fixed in a chinrest. Data is collected immediately after calibration in a controlled laboratory environment with constant illumination with 9 stimuli points at gaze angles of ≤18º.

Gaze precision

Monocular Binocular

Without ﬁlter

0.27° 0.20°

With Stampe ﬁlter 2

0.08° 0.06°

Stampe (Behavior Research Methods, Instruments & Computers, 1993, 25 (2), pp.137-142) describes a noise reduction filter commonly used for eye tracking data. In these measurements, the Stampe stage 2 algorithm has been applied.

Chapter 7 Appendices

Tobii X1 Light User Manual

Eye tracking speciﬁcations

Sampling

Variable sampling rate typ. 28-32Hz

Total system latency 50-90 ms

Time to tracking recovery

For blinks Immediate

After lost tracking 100-300 ms

Head movement

Freedom of head movement at 65 cm (width x height)

typ. 44 x 32 cm

(17.3 x 12.6’’)

Operating distance (eye tracker to subject)

See Tobii X1 Light Eye

Tracker Accuracy and Preci-

sion Test Report for details.

Recommended largest gaze angle

27°

Tracking technique Dark/bright pupil tracking

Chapter 7 Appendices

Tobii X1 Light User Manual

7.2 Appendix B: Technical speciﬁcations

Eye Tracking unit

Eye tracking processing unit Embedded

Weight 350 g (12.3 oz)

Unit Size

24.9 x 5.0 x 4.8 cm (9.8 x 2.0 x 1.9’’)

Connectors

Micro USB

Power connector

Chapter 7 Appendices

Tobii X1 Light User Manual

7.3 Appendix C: Glossary

Monocular/ binocular

Monocular data shown is based on data from each eye individually. Binocular data is the average of the two eyes.

Gaze precision Describes the spatial angular variation between individual and

consecutive gaze samples. Gaze precision can be measured under various conditions. Gaze precision is sometimes also speciﬁed as ‘spatial resolution’.

Gaze accuracy Describes the angular average distance from the actual gaze

point to the one measured by the eye tracker. Gaze accuracy can be measured under various conditions.

Sampling rate Number of data samples per second. The Tobii X1 Light Eye

Tracker has a variable data-rate which is typically between 28 and 32 Hz, i.e. typically between 28 to 32 data samples per second are collected for each eye. .

Total system latency The duration from mid-point of the eye image exposure, to

when a sample is available via the API on the client computer. This includes half of the image exposure time, plus image readout and transfer time, processing time and time to transfer the data sample to a client computer.

Time to tracking recovery for blinks

When a subject blinks, the eye tracker loses the ability to track eye gaze because the eye is covered by the eye lid. If the pupil is occluded for only a short period, the system will regain tracking immediately when the pupil becomes visible again, but only if the subject has maintained approximately the same head position during the blink. Data during blinks are only lost when the pupil is occluded, i.e. during the eye lid movement itself or when the eye is closed.

Chapter 7 Appendices

Tobii X1 Light User Manual

Time to tracking recovery after lost tracking

An eye tracker working in a natural user environment may occasionally lose track of the subject’s eyes, e.g., when the subject completely turns away from the tracker. If a period of a few hundred milliseconds elapses during which the eye tracker is unable to detect the eyes in close proximity to where they were last detected, the eye tracker will start searching for the eyes within the entire head movement box. The stated measurement is the typical time to tracking recovery in such a situation. If the eye tracker is unable to detect the eyes of the subject even after about one minute, the system will enter a “slow search” mode, leading to larger recovery times.

Freedom of head movement

Describes an area (height × width in cm) where at least one eye is within the eye tracker’s ﬁeld of view.

Operating distance Describes the minimum and maximum distances between

the subject’s eyes and the surface covering the eye tracker sensors at which eye tracking can be done while maintaining robust tracking.

Recommended largest gaze angle

The largest recommended gaze angle for which the eye tracker can perform robust and accurate tracking on both eyes. The gaze angle is the angle ABC with A = center of the eye tracker (midpoint between the two eye tracking sensors), B = eye position (midpoint between the left and the right eye) and C = stimuli point.

Eye tracking technique

Tobii Eye Trackers use two different techniques to determine eye position: 1. Bright pupil eye tracking, where an illuminator is placed close to the optical axis of the imaging device, causing the pupil to appear lit up (the same phenomenon that causes red eyes in photos). 2. Dark pupil eye tracking where the illuminator is placed away from the optical axis, causing the pupil to appear black.

Eye tracking processing unit

Gaze data calculations are performed by ﬁrmware embedded in the eye tracker.

Chapter 7 Appendices

Tobii X1 Light User Manual

7.4 Appendix D: Software installed with the installation CD

When running the installation CD the drivers and some software necessary for using the Tobii X1 Light Eye Tracker are installed. In the table below the installed software and its function is listed.

Bonjour This is used for communication with the eye tracker and is a

prerequisite for the other applications.

DirectX This is a prerequisite for the other applications.

Tobii Eye Control Suite

This is needed for the eye tracker setup conﬁguration.

Tobii Eye Tracker Browser

This software lists the eye trackers connected to the computer and also includes the X Conﬁguration Tool which allows the user to conﬁgure the physical setup of the eye tracker in relation to the tracked object.

Tobii X1 Light Eye Tracker

This software contains of two main parts:

• The Tobii X1 Light Conﬁguration Guide is a step-bystep guide for conﬁguration of the eye tracker setup

• The Tobii Notiﬁer that keeps track of changes in the monitor/screen setup, and if needed it launches the conﬁguration guide. It is also possible to activate a user tracking function that launches an informaiton window if the user moves out of the track box..

Chapter 7 Appendices

Tobii X1 Light User Manual

7.5 Appendix E: Recommended display sizes

The eye tracker can only do accurate eye tracking of a person’s eyes if the visual angle as seen from the person’s eyes does not exceed 27 degrees between the center of the eye tracker and any point on what the person is looking at. This is valid as long as the person stays within the area in front of the eye tracker diﬁned as the “track box” which roughly is between 55-80 cm from the center of the eye tracker when seen from the side (read more about this in chapter 4.3.1 Track Box on page

23).

Max 27°

65 cm 26’’

This means that depending on the position of the eye tracker in relation to the display, it can track different sizes of displays. If the display is positioned further away from the user, a larger area can be tracked. However, small objects shown on the display might be difﬁcult to see for the user at a greater distance.

Max 27°

Max

27°

Another aspect to consider is illustrated in the image seen on the left: the aspect ratio of the display is also important. Since the optimally tracked area is a half circle, the eye tracker can track displays with a large width to height ratio better than displays where this ratio is small.

Chapter 7 Appendices

Centimeters

Tobii X1 Light User Manual

The display sizes below have been calculated to be within 27 degrees of viewing angle and, hence, suitable for being used with the Tobii X1 Light Eye Tracker. It might be possible for some users to use larger displays than the ones given below, but that will be at the user’s own risk of not being able to collect eye tracking data in the top corners of the display.

Maximal display size in inches

Aspect ratio

Mounting bracket under the monitor*

Adhesive mounting bracket

Mounting bracket in front of the monitor*

16:9

17 19 21

16:10

16 19 20

4:3

15 17 18

5:4

15 17 18

* Assuming a lower

monitor frame height of

2cm or less.

* Assuming a distance of 4 cm

between the back of the eye

tracker and the display surface.

The display sizes above are based on tests on subjects without vision aids such as lenses or glasses in normal ofﬁce lighting without any interfering light sources such as windows or near infra red light-emitting lamps. For persons with glasses or lenses or other characteristics that might interfere with trackability such as droopy eyelids or extensive use of mascara or environment with interfering light sources, the trackability in the top corners of the display might be lower than for the conditions tested here.

Chapter 7 Appendices

Inches

Tobii X1 Light User Manual

www.tobii.com

HEADQUARTERS, SWEDEN

Tobii Technology AB Karlsrovägen 2D S-182 53 Dande ryd Sweden Phon e : +46 8 663 69 90 Fax: + 46 8 30 14 00 www.tobii.com sales@tobii.com

CENTRAL EUROPE

Tobii Technology GmbH Niedenau 45 D-6 0325 Frank furt am Ma in Germany Phon e: +49 69 24 75 03 40 Fax: + 49 69 24 75 03 429 www.tobii.com sales.de@tobii.com

CHINA

Tobii Electronics Technology Suzho u Co. Ltd. No. 678, F engting Ave nue Land Industrial Park Weiting, Suzhou Post c ode: 215122 China Phon e: +86 136 2528 5172 www.tobii.com sales.cn@tobii.com

JAPAN

Tobii Technology, Ltd. 3-4-13 Takanawa, Minato-ku Tokyo 108-0074 Japan Phon e: +81-3-5793 -3316 Fax: +81-3-5793-3317 www.tobii.com sales.jp@tobii.com

NORTH AMERICA

Tobii Technology Inc 510 N, Washing ton Street, S uite 200 Fall Church VA 220 46 USA Phon e: + 1-703-738-1300 +1-888-898-6244 Fa x: + 1-70 3-73 8-1313 www.tobii.com sales.us@tobii.com

Tobii Support

NORTH EUROPE

Phone: +46 8 522 950 10

support@tobii.com

Support hours: 8 am - 6 pm Between July-August: 9am - 5pm

(Central Eur opean Time, GMT +1)

CENTRAL EUROPE

Phone: +49 69 24 75 03 4-27

support@tobii.com

Support hours: 8 am - 6 pm Between July-August: 9am - 5pm

(Central Eur opean Time, GMT +1)

USA

Phon e: +1-703-738-1320

support.us@tobii.com

Support hours: 8 am - 5 pm

(US Ea stern Stan dard Time, G MT -6)

JAPAN

Phone: +81-3-5793-3316

support.jp@tobii.com

Support hours: 9 am - 5.30 pm

(Japan Standard Time, GMT +9)

Tobii X1 Light Eye Tracker User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual