HAMAMATSU C7339 Datasheet

DATA SHEET

Position Sensor C7339

(For Laser Beam Alignment)

The C7339 Position Sensor is an opto-electric position­sensing unit which measures the position of a single
point of light spot-focused onto the sensor head.
The use of hybrid circuitry allows for a compact, light­weight design and a divided configuration with a light,
compact sensor head and a controller equipped with a
light level indicator and data displays for ease of opera­tion. The measured position is displayed digitally in terms
of X- and Y-coordinate voltages on the front panel of the
controller and may be simultaneously output to a re­corder.
The C7339 does not possess a background-light cancel­lation function and is suited for use in locations where the
signal light is distinct from the background such as in the
detection of laser beams.

SYSTEM CONFIGURATION EXAMPLE

Standard configuration

Controller

POSITION SENSOR SYSTEM

HAMAMATSU

POWER

POWER

1.11

X DATA

Laser beam

Sensor head

HAMAMATSU

1.11

FEATURES

• Quick Response

The response time of less than 20µs enables accurate mea­surement of the spot, even while it is moving at high speeds.

• Stable Measurement

The position data (X-Y coordinate voltages) of a light spot is
obtained without being affected by signal current fluctua­tions from the PSD, enabling accurate position measurement
regardless of fluctuations in the light intensity.

• Broad Spectral Response

The C7339 has a broad spectral range, from 300 to 1100 nm,
enabling the detection of a variety of light sources, including
lasers.

• High Resolution

The PSD employed in the sensor head is of the non-discrete
type, which, contrary to a discrete-type sensor, has no insen­sitive area. This enables continuous measurement at a high
resolution of 1/5000 (when using a recorder).

• Light Level Indicator

The input light level is indicated in digits on the front panel

of the control unit (0.00 to 10.0) so as to make it easy to adjust
the lens iris and select an ND filter.

Computer

C7339

Y DATA

HIGH
LOW

5.5

SENSOR HEAD

Analog

LEVEL

OUT

AD convertor

Power Macintosh

Power PC

6100/60

Laser beam alignment system

Analog

OUT

X-Y Recorder

Oscilloscope

OTHER APPLICATIONS

• Surface Flatness Measurement

• Solar Tracking Systems

CONFIGURATION

Sensor head (C7339-01) ....................... 1

Controller (C7339-0X*) .......................... 1

AC cable (2m) ........................................ 1

Head connecting cable (5m).................. 1

Signal cables (BNC-BNC, 3m) .............. 2

Fuses (1A) ............................................. 3

Line voltage * X = 2 ......................... 100V

3..........................117V

4..........................220V

5..........................240V

OPTIONAL

Metal interference filters
Filter adapter

SPECIFICATIONS

Detector
Useful sensitive area (Fig.1) 10 × 10mm

Lens mount C mount
Output voltage: X-axis – 5 to + 5V

Y-axis – 5 to + 5V
Output impedance 500Ω ± 10%
Response speed (Fig.2) Within 20µs
Recommended measurement light level
Position detection error Zone A
Error due to light intensity variations
Resolution

(when using a recorder)
Jitter ±1.5/1000
Drift ±0.5%/day (after the first 30 minutes)
Operating temperature 0 to +40°C
Storage temperature –10 to +50°C
Operating/storage humidity Less than 90% (with no condensation)
Line voltage 100/117/220/240VAC ±10%, 50/60Hz
Power consumption Approx. 30VA

Non-discrete position-sensitive detector
(Hamamatsu S1880-03)

Light level (∑) = 8 (Displayed on a level indicator)

(refer to figure below)

±1.0%, Zone B ±2.0%

±1% (Light level (∑) = 8→4)

1/5000

10mm

ZONE B

ZONE A

5mm

Fig.1 Useful Sensitive Area

and Zones A and B

10mm

Fig.2 Rise and fall time of the output voltage when a pulsed light is applied to the center

INPUT
LIGHT

OUTPUT
VOLTAGE

of the sensitive area.

20µs20µs

RISE TIME

FALL TIME

90

%

%

10

The rise time is the period of time required for the output voltage to rise from 10%
to 90% of its full level.
The fall time is the period required for the output voltage to return from 90% to 10%.

OPTIMUM INPUT LASER POWER

Laser Wavelength Input Laser Power

He-Ne Laser 632nm Approx. 23µW

Ar Laser 514nm Approx. 27µW

When light with the value on the table at the left is input, "8" appears on the
display indicating the volume of incident light. If strong laser light is used, an
ND filter or similar means should be used to reduce the volume of laser light
to the optimum volume before beginning measurement.

DIMENTIONAL OUTLINE (UNIT:mm)

• Sensor head (Weight: Approx. 140g) • Controller (Weight: Approx. 3.87kg)

40

42

64

HAMAMATSU

POSITION SENSOR SYSTEM

HAMAMATSU

POWER

X DATA

1.11

POWER

74

1.11

232

Y DATA

HIGH
LOW

LEVEL

5.5

SENSOR HEAD

C7339

RESPONSE
FREQUENCY

OUTPUT

0

100H

-3dB

Z

2kH

Z

Fig.3 Response frequency of the output

voltage when a spot light is moved
right and left repeatedly while it is
being applied to the sensitive area.

SIGNAL OUT

X DATA Y DATA

227

LINE

69.6

• Subject to local technical requirements and regulations, availability of products included in this promotional material may vary.

Please consult with our sales office.

• Information furnished by HAMAMATSU is believed to be reliable. However, no responsibility is assumed for possible inaccuracies

or omissions. Specifications and external appearance are subject to change without notice.

© 1999 Hamamatsu Photonics K.K.

Homepage Address http://www.hamamatsu.com

HAMAMATSU PHOTONICS K.K., Systems Division
812 Joko-cho, Hamamatsu City, 431-3196, Japan, Telephone: [phone], Fax: [phone], E-mail:[e-mail]

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Cat. No. SIMS1004E01
FEB/99 CR
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