Coherent LaserCam-HR User Manual

Page 1
User Manual
LaserCam-HR
Beam Diagnostics Digital CMOS Camera
USB 2.0
™
Page 2
Page 3
User Manual LaserCam-HR Beam Diagnostics Digital CMOS Camera USB 2.0
7470 SW Bridgeport Rd. Portland, OR 97224
Page 4
LaserCam-HR User Manual
This document is copyrighted with all rights reserved. Under the copyright laws, this document may not be copied in whole or in part or reproduced in any other media without the express written permission of Coherent, Inc. Permitted copies must carry the same proprietary and copyright notices as were affixed to the original. This exception does not allow copies to be made for others, whether or not sold, but all the material purchased may be sold, given or loaned to another person. Under the law, copying includes translation into another language.
Coherent and the Coherent Logo are registered trademarks of Coherent, Inc. LaserCam-HR, BeamView Analyzer, and BeamView-USB are trademarks of Coherent, Inc.
Every effort has been made to ensure that the data given in this document is accurate. The information, figures, tables, specifications and schematics contained herein are subject to change without notice. Coherent makes no warranty or representation, either expressed or implied with respect to this document. In no event will Coherent be liable for any direct, indirect, special, incidental or consequential damages resulting from any defects in its documentation.
Technical Support
In the U.S.:
Should you experience difficulties with your product, or need technical information, please visit our website: www.Coherent.com either telephoning our Technical Support Hotline at
1.800.343.4912, or e-mailing our Support Team at [email protected]. Telephone coverage is available Monday through Friday (except U.S. holidays).
If you call outside our office hours, your call will be taken by our answering system and will be returned when the office reopens.
If there are technical difficulties with your product that cannot be resolved by support mechanisms outlined above, please
. You can obtain additional support by
ii
Page 5
e-mail or telephone Coherent Technical Support with a description of the problem and the corrective steps attempted. When communicating with our Technical Support Department, via the web or telephone, the model and serial number of the product will be required by the Support Engineer responding to your request.
Outside the U.S.:
If you are located outside the U.S., visit our website for technical assistance, or telephone our local Service Representative. Representative phone numbers and addresses can be found on the Coherent website: www.Coherent.com
Coherent provides web and telephone technical assistance as a service to its customers and assumes no liability thereby for any injury or damage that may occur contemporaneous with such services. These support services do not, under any circumstances, affect the terms of any warranty agreement between Coherent and the buyer. Operating a Coherent product with any of its interlocks defeated is always at the operator's risk.
.
iii
Page 6
LaserCam-HR User Manual
iv
Page 7

Table of Contents

TABLE OF CONTENTS
Preface ......................................................................................................... vii
U.S. Export Control Laws Compliance ....................................................... vii
Publication Updates ..................................................................................... vii
Symbols Used in This Document ............................................................... viii
Safety ...................................................................................................................1
Declaration of Conformity..............................................................................3
Description .......................................................................................................5
Setup ....................................................................................................................7
Software Installation .......................................................................................7
Cabling............................................................................................................8
USB Cable .............................................................................................8
Trigger Cable .........................................................................................9
Mounting the Camera .....................................................................................9
Operation ........................................................................................................11
Pixel Spacing ................................................................................................12
Power On ......................................................................................................12
Warm-Up Time .............................................................................................12
Maximum Power Levels...............................................................................13
Saturation ......................................................................................................13
Trigger...........................................................................................................13
Trigger In .............................................................................................13
Trigger Out...........................................................................................14
Low Distortion Faceplate (LDFP) ................................................................14
Dust/Dirt .......................................................................................................15
Cleaning the Sensor ......................................................................................15
Fringes ..........................................................................................................16
v
Page 8
LaserCam-HR User Manual
How to Get the Most From Your LaserCam-HR System .............................17
Warranty .........................................................................................................21
Limited Warranty ..........................................................................................21
Warranty Limitations ....................................................................................22
Obtaining Service .........................................................................................22
Product Shipping Instructions.......................................................................24
Appendix A: Specifications ................................................................25

LIST OF TABLES

1. Pixel Spacing for LaserCam-HR ...............................................................12
2. Saturation ...................................................................................................13
3. Coherent Service Centers...........................................................................23
4. Specifications.............................................................................................25

LIST OF FIGURES

1. USB Cable ...................................................................................................8
2. Trigger Cable ...............................................................................................9
3. Mounting Configurations...........................................................................10
4. Dust on Filter Glass ...................................................................................15
5. Fringes .......................................................................................................17
vi
Page 9

Preface

Preface
U.S. Export Control Laws Compliance
This manual contains user information for the LaserCam-HR™ Beam Diagnostics Digital CMOS Camera.
It is the policy of Coherent to comply strictly with U.S. export control laws.
Export and re-export of lasers manufactured by Coherent are subject to U.S. Export Administration Regulations, which are administered by the Commerce Department. In addition, shipments of certain components are regu­lated by the State Department under the International Traffic in Arms Regulations.
The applicable restrictions vary depending on the specific product involved and its destination. In some cases, U.S. law requires that U.S. Government approval be obtained prior to resale, export or re-export of certain articles. When there is uncertainty about the obligations imposed by U.S. law, clarification should be obtained from Coherent or an appropriate U.S. Government agency.

Publication Updates

To view information that may have been added or changed since this publication went to print:
1. Connect to www.Coherent.com
2. Type LaserCam-HR in the Site Search box (top left of the screen) and then click the “>>” button.
vii
.
Page 10
LaserCam-HR User Manual

Symbols Used in This Document

This symbol is intended to alert the operator to the presence of exposure to hazardous visible and invis­ible laser radiation.
This symbol is intended to alert the operator to the presence of dangerous voltages associated with the product that may be of sufficient magnitude to consti­tute a risk of electrical shock.
This symbol is intended to alert the operator to the presence of important operating and maintenance instructions.
viii
Page 11

Safety

SAFETY
Carefully review the following safety information to avoid personal injury and to prevent damage to this instrument or any sensor connected to it. This equipment contains no user-serviceable parts. For service informa­tion, refer to “Obtaining Service” on page 22.
The use and measuring of lasers is potentially dangerous. This instrument operates over wave­lengths that include non-visible laser emissions.
Proper laser operating practice in accordance with manu­facturer recommendations is vital.
Eyewear and other personal protective equipment must be used in accordance with applicable laws and regula­tions.
If in doubt of correct operating procedures, consult the laser manufacturer and your laser safety officer.
The equipment is not for use in critical medical environ­ments.
Do not operate the camera if its panels are removed or any of the interior circuitry is exposed.
1
Page 12
LaserCam-HR User Manual
Do not operate the camera in wet or damp conditions, or in an explosive atmosphere.
Operate the camera only within the specified voltage range.
Do not operate the camera if there are suspected fail­ures. Refer damaged equipment to qualified Coherent service personnel.
2
Page 13

Declaration of Conformity

Safety
3
Page 14
LaserCam-HR User Manual
4
Page 15
Description
DESCRIPTION
The LaserCam-HR™ Beam Diagnostics Digital CMOS camera utilizes a laser grade CMOS sensor for detection and analysis of laser beam profiles from 270 µm to 5.5 mm in diameter with 6.7 µm by 6.7 µm spatial resolution over the spectral range of 300 to 1100 nm. LaserCam-HR characteristics include excellent signal-to-noise ratio and linear response for accurate beam dimension and uniformity measurements, and high overexposure protection for distortion-less measurements of saturated beam profiles.Other features include:
• USB 2.0 digital interface
2
/
-inch progressive scan
3
• Compact design minimizes space required in
optical train
• Mountable in any orientation for maximum flexi-
bility. Camera markings provide for X, Y, and
38.6° alignments.
• Uses a single interface cable for data and power
• A Low Distortion Faceplate (LDFP) that mini-
mizes room light, protects the CMOS array, and provides laser grade quality attenuation of 2500:1
• High sensitivity and dynamic range
• No lag, geometric distortion, or image burn-in
5
Page 16
LaserCam-HR User Manual
• Accepts C-mount optics, including all Coherent
• High resolution: 1280 x 1024 active picture
• Requires only USB 2.0 connections
• CE compliant when used with a CE-compliant
optical sampling, attenuation, and UV conversion accessories.
elements (pixels)
computer and cables
6
Page 17
SETUP
This section discusses the following topics:
• Software installation (this page)
• Cabling (page 8)
• Mounting the camera (page 9)

Setup

Software Installation

For complete software installation instructions, refer to the BeamView-USB With LaserCam-HR Quick Start Guide (1086147) that shipped with your product. To view that document online:
1. Connect to out website: www.Coherent.com.
2. Type LaserCam-HR in the Site Search box (top left of the screen) and then click the “>>” button.
3. Click the “LaserCam-HR” link in the list of search results.
4. Click the “BeamView-USB With LaserCam-HR Quick Start Guide” link (right side of the page, under the Literature & Documentation” heading).
5. If the Download Request form appears (which only happens the first time you visit our website and request literature), fill in the information and then click the “Submit” button at the bottom of the form.
7
Page 18
LaserCam-HR User Manual

Cabling

USB Cable

Place the LaserCam-HR at the location where the beam will be measured. To protect the faceplate from dust, leave the dust cap installed until ready to make measure­ments.
Connect the USB 2.0 cable to the USB 2.0 connector on the LaserCam-HR camera (see Figure 1). Do not
connect the cable to the computer until instructed to do so.
Figure 1. USB Cable
LaserCam-HR produces a standard UB 2.0 digital signal. It will interface through the USB 2.0 connector of any compatible PC using Coherent BeamView Version 4.3 software.
Connecting the optional trigger cable is discussed next.
8
Page 19
Setup

Trigger Cable

Mounting the Camera

For information about the LaserCam-HR trigger, refer to “Trigger” on page 13.
Figure 2. Trigger Cable
LaserCam-HR is designed to be mounted in any rota­tional position (in Figure 3, θ = 0 to 360°) with a
1
/
-20
4
threaded mounting post (for mounting post location, see “Physical Dimensions” on page 25). Alignment marks permit the camera to be rotated and aligned with the vertical, horizontal, and diagonal orientation of the sensor. The diagonal alignment mark helps identify the maximum diagonal position of the sensor array. Depending on the mounting orientation of the camera, the diagonal alignment mark will be either 38° or 52° off-axis to account for the rectangular shape of the
9
Page 20
LaserCam-HR User Manual
sensor. Note that the beam movement on the camera will not match the beam movement on the monitor for all positions.
θ
Diagonal Alignment Mark
Figure 3. Mounting Configurations
10
Page 21

Operation

OPERATION
This section discusses the following topics:
• Pixel spacing (page 12)
• Power on (page 12)
• Warm-up time (page 12)
• Maximum power levels (page 13)
• Saturation (page 13)
• Trigger (page 13)
• Low Distortion Face Plate (LDFP) (page 14)
• Dust/dirt (page 15)
• Cleaning the sensor (page 15)
• Fringes (page 16)
• How to get the most from your LaserCam-HR
system (page 17)
11
Page 22
LaserCam-HR User Manual

Pixel Spacing

The LaserCam-HR pixel spacing values are shown in Table 1
Table 1. Pixel Spacing for LaserCam-HR
2
/
-INCH FORMAT
3
Horizontal Spacing Vertical Spacing
LaserCam-HR 6.70 µm 6.70 µm

Power On

LaserCam-HR has no ON/OFF switch. As soon as power is applied to the camera via the USB 2.0 connection, it begins operating.

Warm-Up Time

The LaserCam-HR does not require warm-up. However, if it is used to make high-accuracy measurements, it should be allowed to warm-up at least 15 minutes to insure best baseline (background) stability.
For best results, the background map should be taken after the camera warm-up period.
12
Page 23
Operation

Maximum Power Levels

The camera will saturate at approximately 16.0 µW/cm at 633 nm wavelength, 320.0 µW/cm2 at 1.06 µm wave­length, or 3.2 µJ/cm2 pulsed 1.06 µm wavelength.
Damage may occur at power levels that exceed 10,000 times saturation power density.

Saturation

Table 2. Saturation
WAVELENGTH ON ARRAY ON LDFP
633 nm (CW) 16.0 µW/cm
1064 nm (CW) 320.0 µW/cm
2
2
40.0 mW/cm
800.0 mW/cm
2
2
2
1064 nm (Pulse) 3.2 µJ/cm

Trigger

Trigger In

2
8.0 mJ/cm
2
The LaserCam-HR trigger permits the beam diagnostic system to interface to pulsed lasers and transient optical events including single shot lasers.
Trigger In uses the BNC connector labeled “IN” on the LaserCam-HR trigger cable. This 5 VDC, TTL input—available on the rising or falling edge—causes the camera to immediately reset and begin integrating
13
Page 24
LaserCam-HR User Manual
light. The Trigger In delay is 150 µS. This is the time it takes for the camera to begin integrating light once the trigger signal occurs. The LaserCam-HR is capable of sampling laser pulse repetition rates of up to 100 Hz without averaging adjacent pulses.

Trigger Out

Low Distortion Faceplate (LDFP)

Trigger Out has been eliminated on this version of LaserCam. Coherent suggests that an external pulse generator be used if the laser under test does not supply a “sync-out” signal. Connect the pulse generator to the Trigger In connector. A delayed trigger should be applied to the Enable or Trigger input connector of the laser. Keep in mind that integration begins 150 µS after the rising edge of the camera trigger (Trigger In), so you must delay the laser enable pulse by 150 µS, minus any delay in the laser firing circuit.
The Low Distortion Faceplate provides a protective window for the camera array that also acts as a back­ground attenuator with 0.04% to 0.05% typical. The LDFP is made of laser grade filter glass that minimizes interference fringes (refer to “Fringes” on page 16) and does not distort the beam image. The LDFP limits room light, instrumentation lights, and flash lamp light from reaching the camera sensor. These lights cause a back­ground level that may not be effectively subtracted by the Background Subtraction Wizard.
14
Page 25
Operation

Dust/Dirt

If low intensity spots or small circles are noticed in the camera video then dust may be present on the CMOS sensor or on the Low Distortion Faceplate (see Figure 4 on page 15). Dust on the LDFP filter glass can cause distortion in the form of small circular diffraction rings, or can cause low-intensity spots if present on the sensor array. Observe the defects with a flashlight or a small light illuminating the camera. If the defect moves when the illumination angle is changed, then the dust is on the LDFP. Otherwise it is dust on the sensor array. Use clean air at low pressure, or methanol and lens tissue to clean the LDFP filter glass. Take all necessary precau­tions to insure that nothing comes in contact with the sensor surface.

Cleaning the Sensor

Figure 4. Dust on Filter Glass
Avoid unnecessary exposure of the sensor to dust and dirt. If the surface of the sensor has to be cleaned, never use any kind of cloth, tissue, or brush, and strictly avoid the use of any kind of cleaning fluid. Only use clean, dry, micro-filtered low-pressure air to gently blow away particles from the surface of the sensor. Contact
15
Page 26
LaserCam-HR User Manual
Coherent Customer Service if the sensor requires addi­tional cleaning (refer to “Coherent Service Centers” on page 23 for contact information).
Touching the sensor will cause irreversible damage.
Always cover the sensor with a dust cap when not in use.

Fringes

If the LDFP filter glass is installed in the camera, fringes may appear in the video (see Figure 5). The fringe pattern is due to a second reflection off the sensor and LDFP superimposing back onto the original beam image. This situation can be corrected by loosening the C-mount
16
Page 27
Operation
setscrew and rotating the LDFP housing until the fringes are no longer present. Slightly turning the camera with respect to the laser beam may also reduce this effect.
Figure 5. Fringes

How to Get the Most From Your LaserCam-HR System

The LaserCam-HR has been carefully designed to provide accurate measurements of the spatial and inten­sity characteristics of laser beams. Significant attention has been paid to every aspect of the instrument that impacts data accuracy. The following items will help you obtain the best performance from your LaserCam-HR:
• System tray—Turn off everything that is
non-essential to the running of the computer. This action will help assure the fastest frame update rate possible.
• Resolution—Select 640 x 512 x 8 resolution to
obtain the highest update rates.
• RAM—A minimum of 512 MB is required. 1 GB
is recommended. More is typically better.
• Select RAM for the buffer to obtain the highest
update rates.
17
Page 28
LaserCam-HR User Manual
• Processor speed—A minimum of 3.3 GHz is
• Keep all optics clean—Dirty LDFP, beam
• The Inclusion command provides control of the
recommended. Faster clock speeds provide higher frame update rates. Again, “the faster the better.”
sampling, and attenuation optics will distort the beam under test. It is important that you regularly check these optical surfaces for dust, fingerprints, and other contamination. Follow standard coated optical surfaces cleaning techniques. Use the Inclu­sion command to reduce the size and amount of data that is processed.
sensor area where calculations are performed. Reducing this area can significantly increase frame update rates and is especially effective with small spot sizes.
Cleaning the sensor surface will void the warranty and most likely will damage the camera.
It is strongly recommended that the LDFP always be left in place and that the dust cap be used to protect the LDFP when the instrument is not in use.
• Read the user documentation—The LaserCam-HR
is a complex piece of optical test equipment. Many functions are included in the system that may not be obvious to a casual or first-time user. Review the LaserCam-HR User Manual (this manual) and the BeamView-USB Help (accessed by clicking the Help button in the BeamView software) to learn about these useful functions. Many calcula-
18
Page 29
Operation
tions and functions that may at first appear to require post-processing or exporting of the data to another application are included in the instrument. The user documentation is designed to explain all of the functions in an easy-to-use format.
Observe standard Laser Safety procedures—The eyes you save may be your own.
19
Page 30
LaserCam-HR User Manual
20
Page 31

Warranty

WARRANTY
This section includes information on the following topics:
• Limited warranty (this page)
• Warranty limitations (page 22)
• Obtaining service (page 22)
• Product shipping instructions (page 24)

Limited Warranty

Coherent, Inc. (the “Company”) warrants its laser beam diagnostic products (“Products”) to the original purchaser (the “Customer”) that the product is free from defects in materials and workmanship and complies with all specifications, active at the time of purchase, for a period of twelve (12) months.
If the Product fails and is returned to the Company within one year following the date of purchase, the Company will, at its option, repair or replace the Product or any component found to be defective. This warranty applies only to the original purchaser and is not transferable.
Coherent, Inc. will, at its option, repair or replace any product or component found to be defective during the warranty period. This warranty applies only to the orig­inal purchaser and is not transferable.
21
Page 32
LaserCam-HR User Manual

Warranty Limitations

The foregoing warranties shall not apply, and Coherent reserves the right to refuse warranty service, should malfunction or failure result from:
• Damage caused by improper installation, handling,
or use.
• Laser damage (including sensor elements damaged
beyond repair).
• Failure to follow recommended maintenance
procedures.
• Unauthorized product modification or repair.
• Operation outside the environmental specifications
of the product.
Coherent assumes no liability for Customer-supplied material returned with Products for warranty service or recalibration.
THIS WARRANTY IS EXCLUSIVE IN LIEU OF ALL OTHER WARRANTIES WHETHER WRITTEN, ORAL, OR IMPLIED. COHERENT SPECIFICALLY DISCLAIMS THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL THE COMPANY BE LIABLE FOR ANY INDIRECT, INCIDENTAL, OR CONSEQUENTIAL DAMAGES IN CONNECTION WITH ITS PRODUCTS.

Obtaining Service

In order to obtain service under this warranty, Customer must notify the Company of the defect before the expira­tion of the warranty period and make suitable arrange­ments for the performance of service. The Company
22
Page 33
Warranty
shall, in its sole discretion, determine whether to perform warranty service at the Customer's facility, at the Company's facility or at an authorized repair station.
If Customer is directed by the Company to ship the product to the Company or a repair station, Customer shall package the product (to protect from damage during shipping) and ship it to the address specified by the Company, shipping prepaid. The Company shall pay the cost of shipping the Product back to the Customer in conjunction with product failures within the first twelve months of time of sale.
A Returned Material Authorization number (RMA) assigned by the Company must be included on the outside of all shipping packages and containers. Items returned without an RMA number are subject to return to the sender.
For the latest Customer Service information, refer to our website: www.Coherent.com.
Detailed instructions on how to prepare a product for shipping are shown under “Product Shipping Instruc­tions” on page 24.
Table 3. Coherent Service Centers
LOCATION PHONE FAX E-MAIL
USA 1.800.343.4912 971.327.2777 [email protected]
Europe +49-6071-968-0 +49-6071-968-499 [email protected]
International 971.327.2700 971.327.2777 [email protected]
23
Page 34
LaserCam-HR User Manual

Product Shipping Instructions

To prepare the product for shipping to Coherent:
1. Contact Coherent Customer Service (refer to Table 3 on page 23) for a Return Material Authori­zation number.
2. Attach a tag to the product that includes the name and address of the owner, the person to contact, the serial number, and the RMA number you received from Coherent Customer Service.
3. Wrap the product with polyethylene sheeting or equivalent material.
4. If the original packing material and carton are not available, obtain a corrugated cardboard shipping carton with inside dimensions that are at least 6 in (15 cm) taller, wider, and deeper than the product. The shipping carton must be constructed of card­board with a minimum of 375 lb (170 kg) test strength. Cushion the instrument in the shipping carton with packing material or urethane foam on all sides between the carton and the product. Allow 3 in (7.5 cm) on all sides, top, and bottom.
5. Seat the shipping carton with shipping tape or an industrial stapler.
6. Ship the product to:
Coherent, Inc. 7470 SW Bridgeport Rd. Portland, OR 97224 Attn: RMA # (add the RMA number you received
from Coherent Customer Service)
24
Page 35
APPENDIX A: SPECIFICATIONS
Table 4 lists specifications for the LaserCam-HR.
Table 4. Specifications
PARAMETER DESCRIPTION
GENERAL
Physical Dimensions
Appendix A: Specifications
68.1 mm
34.0 mm
34.0 mm
68.1 mm
45.3 mm
36.6 mm
1
-20 TPI
/
4
(optional M6 rotational mount available - part #1086781)
14.0 mm
23.0 mm
79.3 mm
8-32 16.9 mm
40.9 mm
26.9 mm
4.1 mm from housing face to element face locating surface
17.8 mm from LDFP to element face locating surface
25
Page 36
LaserCam-HR User Manual
Table 4. Specifications (Continued)
PARAMETER DESCRIPTION
2
/
Spectral Range
Camera Type Progressive scanning CMOS
Video Format 10-bit digital USB 2.0 hi-speed
-inch: Silicon, 300 to 1100 nm (400 to 1100 nm with LDFP)
3
Sensor Active Area 8.5 mm (H) x 6.8 mm (V) (
2
/
-inch format)
3
Sensor Elements 1280 (H) x 1024 (V)
Sensor Element Spacing 6.70 µm (H) x 6.70 µm (V)
Recommended Beam Diam. 0.20 mm min., 6.0 mm max. (1/e2)
Optical Dynamic Range > 1000 to 1
Dimensional Accuracy ± 1% (typical), ± 5% (over entire spectral and dimensional
range)
Pulse Trigger In TTL, rising or falling edge
Pulse Integration Timing Integration begins 150 µS after rising edge of Trigger In
Automatic Pulse Trigger 0 to 100% of camera peak response (user adjustable)
Max. Sample Rate 15 Hz (Live mode), 10 Hz (Run mode)
Noise, Peak 24 nW/cm2 (at 632.8 nm)
CW Saturation 40 mW/cm2 (at 632.8 nm) (with LDFP)
Pulsed Saturation 8 mJ/cm2 (at 1.06 µm) (with LDFP)
Damage Threshold 32 mJ/cm2 (at 1.06 µm) (without LDFP)
Distance to Image Plane 17.8 ± 0.5 mm (from front of LDFP)
Electronic Shutter 10 ms
26
Page 37
Table 4. Specifications (Continued)
PARAMETER DESCRIPTION
Weigh t 208 g, 235 g with cable
Lens Mount C-mount
Appendix A: Specifications
Threaded Mounting Post
I/O Connector USB 2.0 Type B
ELECTRICAL
Signal-to-Noise Ratio > 60dB (gain 0 dB, gamma 1.0)
Power Powered through USB 2.0 interface
Video Output Digital: USB 2.0
Black Level Self-adjusting
Exposure Time Set to 10 ms, no user adjustment
Synchronization Internal free-running (crystal)
Gamma 1.0
Gain No automatic gain control. Gain is factory set for optimum linear
ENVIRONMENTAL
1
/4-20
Optional M6 post available (part #1086781)
dynamic range.
Operating Temperature -20 to 60°C
Relative Humidity To 95% non-condensing
27
Page 38
LaserCam-HR User Manual
28
Page 39
Page 40
LaserCam-HR™ User Manual © Coherent, Inc. 10/2005, Printed in the U.S.A. Part No. 1082657, Rev. AB
Loading...