INFRARED DETECTOR
MCT photoconductive detector
P2748/P5274 series, P3257-50
Dewar type detector with high sensitivity and high-speed response in long wavelength range
Features
The band gap can be adjusted by controlling the composition
ratio of HgTe and CdTe. Utilizing this fact, various types are
available in different spectral characteristics.
l
Photoconductive element that decreases its resistance
by input of infrared light
l
Micro-cooled type available
This type of cooling does not require pour-filled liquid
nitrogen.
l
Custom devices available
Custom devices not listed in this catalog are also available
with different spectral response, active area sizes and
number of elements.
Glass dewar type not requiring repumping is also provided.
Applications
l
Choice of spectral response range (up to 25 碌m)
l
FTIR
l
Infrared spectrophotometer
l
Thermal imaging
l
Remote sensing
l
CO
2
laser detection
Accessories (Optional)
l
Valve operator
A3515
l
Amplifiers for dewar type MCT photoconductive detector
C5185
l
Power supply for amplifier
C3871
l
Infrared detector module with preamp P7752-10
Absolute maximum ratings
Allowable
Operating
Storage
current
temperature temperature
Topr
Tstg
(mA)
(擄C)
(擄C)
40
40
-40 to +60
-55 to +60
20
40
20
40
-40 to +55
-45 to +55
I
General rating / Absolute maximum ratings
Type No.
P2748-40
P2748-41
P2748-42
P5274
P5274-01
P3257-50
Dimensional
outline/
Window
material *
鉃€/Z
鉃?Z
鉃€/Z
鉃€/K
鉃?Z
Package
Side-on type metal dewar
Head-on type metal dewar
Side-on type metal dewar
Stirling type metal
Nitrogen
maintenance
Active area
time
Cooling
Min.
(h)
(mm)
1脳1
1脳1
LN
12
0.25 脳 0.25
1脳1
1脳1
Micro-cooled
1脳1
-
I
Electrical and optical characteristics (Typ. unless otherwise noted)
Measurement
Peak
Photo
condition
Cut-off
sensitivity
sensitivity *
2
Element
wavelength
wavelength
S
temperature
lc
l=lp
lp
T
(擄C)
(碌m)
(碌m)
(V/W)
1000
1000
10000
500
250
1000
D
*
(500, 1200, 1)
D
*
(lp, 1200, 1)
NEP
l=lp
Rise
Dark
time
resistance
tr
0 to 63 %
Rd
(碌s)
(W)
Type No.
Min.
Typ.
(cm路 Hz
1/2
/W) (cm路 Hz
1/2
/W)
(cm路 Hz
1/2
/W)
P2748-40
P2748-41
2 脳 10
10
4.0 脳 10
10
0.6
40
12
14
1 脳 10
10
P2748-42
-196
P5274
14
17
2 脳 10
9
1 脳 10
10
1.5 脳 10
10
0.6
30
9
9
10
P5274-01
17
22
1 脳 10
5 脳 10
1.0 脳 10
0.4
100
P3257-50
2 脳 10
10
4.0 脳 10
10
0.6
40
12
14
1 脳 10
10
*1: Window material K: KRS-5, Z: ZnSe
*2: Photo sensitivity changes with the bias current. The values in the above table are measured with the optimum bias current.
(W/Hz
1/2
)
2.5 脳 10
-12
2.5 脳 10
-12
6.3 脳 10
-12
6.7 脳 10
-12
1.0 脳 10
-11
2.5 脳 10
-12
1
1
2
3
4
