QM-5

HgCdTe (MCT) Four-Channel Detection Module

3.5 – 6.0 µm, DC – 1 MHz, with photovoltaic four-element quadrant geometry detector

QM-5 is „all-in-one” position IR detection module. Thermoelectrically cooled photovoltaic quadrant geometry detector, based on HgCdTe heterostructure, is integrated with transimpedance, DC coupled four-channel preamplifier, a fan and a thermoelectric cooler controller in a compact housing. It is designed to accurately measure the displacement of an incident beam relative to the calibrated center. This device is ideal for measuring the movement of a beam, the distance traveled, or as feedback for alignment systems.

See specification

Features

Four channels

Low crosstalk

Single power supply

Compatible with optical accessories

Applications

Spectrophotometry

MWIR laser measurements

Laser power monitoring and control

Laser beam profiling and positioning

Laser calibration

Specification (Ta = 20°C)

Parameter
Typical value
Optical parameters
Cut-on wavelength λcut-on (10%) µm
3.5±0.5
Peak wavelength λpeak, µm
4.5±0.5
Optimum wavelength λopt, µm
5.0
Cut-off wavelength λcut-off (10%) µm
6.0±0.5
Detectivity D*(λpeak), cm⋅Hz1/2/W
≥1.4×109
Detectivity D*(λopt), cm⋅Hz1/2/W
≥1.2×109
Output noise density vn(100 kHz), nV/Hz1/2
≤500
Electrical parameters
Voltage responsivity Rvpeak, R = 1 MΩ*)), V/W
≥1.7×105
Voltage responsivity Rvopt, R = 1 MΩ*)), V/W
≥1.6×105
Low cut-off frequency flo, Hz
DC
High cut-off frequency fhi, Hz ≥1M
Output impedance Rout, Ω 50
Output voltage swing Vout(R = 1 MΩ*)), V 0 – 4
Output voltage offset Voff, V
max ±20
Power supply voltage Vsup, V
+7.5
Power consumption, W
max 6
Other information
Active elements material
epitaxial HgCdTe heterostructure
Active areas A, mm×mm
4×(0.2×0.2)
Distance between active elements, mm
0.02
Window
pSiAR
Acceptance angle, Φ
~70°
Ambient operating temperature Ta, °C
10 to 30
Signal output sockets
4×MCX
Power supply socket
DC 2.1/5.5
Mounting hole
M4
Fan
yes
*) RL – load resistance

Spectral response (Ta = 20°C)

QM-5

Mechanical layout, mm

QM-5-1

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Temperature sensor characteristics

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