INFRARED

DETECTOR

MCT photoconductive detector

10 µm band infrared detector with high sensitivity and high-speed response

Features

band detection

by input of infrared light

Custom devices not listed in this catalog are also

available with different spectral response, active

area sizes and number of element.

thermoelectrically cooled type and micro-cooled type

Easy-to-use infrared detector modules with preamp

available.

Applications

Accessories (Optional)

l Valve operator

A3515

l Amplifiers for dewar type MCT photoconductive detector

C5185

l Infrared detector module with preamp

P7752-10

(with P3257-10)

P3257 series, P4249-08

I Specification / Absolute maximum ratings

Absolute maximum ratings

Active area

Allowable

current

Operating

temperature

Topr

Storage

temperature

Tstg

Type No.

Dimensional

outline/

Window

material

Package

Cooling

(mm)

(mA)

(°C)

(°C)

P3257-25

0.025 × 0.025

10

P3257-01

0.1 × 0.1

20

P3257-10

➀/ZnS

1 × 1

40

P4249-08

➁/ZnS

Metal dewar

Liquid

nitrogen

30

-40 to +60

-55 to +60

*1: 8 elements array

I Electrical and optical characteristics (Typ. unless otherwise noted)

Measurement

condition

Element

temperature

T

Peak

sensitivity

wavelength

lp

Cut-off

wavelength

lc

Photo

sensitivity *

S

l=lp

D*

(500, 1200, 1)

D*

(lp, 1200, 1)

Rise time

tr

0 to 63 %

Dark

resistance

Rd

Type No.

(°C)

(µm)

(µm)

(V/W)

Min.

Typ.

(µs)

(W)

P3257-25

40

P3257-01

80

P3257-10

P4249-08

-196

10.0

12.0

0.6

40

*2: Photo sensitivity changes with the bias current. The values in the above table are measured with the optimum bias current.

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