1

Hamamatsu provides various types of one-dimensional PSDs designed

for high-precision distance measurement such as displacement meters,

camera auto focusing and optical switches. Our product line includes a

visible-cut type for near infrared detection, a red sensitivity enhanced type

for red light detection, a microscopic spot light (LD beam, etc.) detection

type, and a long, narrow type with an active area exceeding 30 mm.

Selection guide

PSD (Position Sensitive Detector) is an optoelectronic position sensor utiliz-

ing photodiode surface resistance. Unlike discrete element detectors such as

CCD, PSD provides continuous position data (X or Y coordinate data) and

features high position resolution and high-speed response.

1

2

3

2

3

2

3

4

4

2

3

4

2

3

4

7

8

7

9

10

9

11

12

13

14

15

5

6

11

13

12

14

15

One-dimensional PSD

······························

(mm)

(mm)

(k

Ω)

(nm)

S6407

1 × 1

1

200

760 to 1100

S6515

1 × 1.2

1.2

140

760 to 1100

S4580-04

760 to 1100

S4580-06

0.8 × 1.5

1.5

140

320 to 1100

S4581-04

760 to 1060

320 to 1060

760 to 1060

760 to 1100

320 to 1100

760 to 1100

760 to 1100

320 to 1100

760 to 1100

440 to 1100

400 to 1100

760 to 1100

320 to 1100

760 to 1100

760 to 1100

320 to 1100

760 to 1100

760 to 1100

320 to 1100

760 to 1100

320 to 1100

320 to 1100

320 to 1100

320 to 1100

700 to 1100

S4581-06

140

S3271-05

1 × 22

400

S4582-04

S4582-06

140

S3272-05

1 × 2.5

2.5

400

S4583-04

S4583-06

140

S3273-05

400

S7879

S8361 *

1 × 33

110

S4584-04

S4584-06

140

S3274-05

1 × 3.5

3.5

400

S7105-04

S7105-06

140

S7105-05

1 × 4.2

4.2

400

S5629

S5629-01

50

S5629-02

1 × 66

300

Plastic

S3979

1 × 3

3

140

TO-5

S3931

1 × 6

6

50

S3932

1 × 12

12

50

S1352

2.5 × 34

34

20

S3270

1 × 37

37

15

Ceramic

* High sensitivity in the red region type

Works with microscopic spot light detection.

1

2

3

4

5

7

8

9

10

6

Interelectrode

resistance

Vb=0.1 V

Type No.

Active area

Resistance length

Package

Spectral response

range