COMPACT PYROSENSORS

MPV device isintended for detection of thermal radiation in the spectral range 0.5...45 mmand can be used in a variety of optical instruments: spectrometers (especiallyin the Fourier spectrometers), radiometers, IR thermometers, spacespectroradiometers, gas analysers, pyrometric safe-guard systems.

Sensor element ofthe MPV device is fabricated in the form of a plane plate made of apyroelectric material. Electrodes are deposited in vacuum on both sides ofthe plate.

Irradiation of theplate increases its temperature and reduces spontaneous polarization.Variations of the plate temperature, caused by absorption of the radiation,manifest itself in the form of variations of the capacitance charge, which canbe measured.

1 Threshhold of sensitivity, W×Hz^-1/2, at the modulation frequency:
f = 60 Hz ≤ 1,5 x 10^-10
f = 200 Hz ≤ 3,0 x 10^-10
f = 470 Hz ≤ 5,0 x 10^-10
2 Voltage sensitivity, V/W, at the modulation frequency:
f = 60 Hz ≥ 10000
f = 200 Hz ≥ 10000
f = 470 Hz ≥ 10000
3 Diameter of sensing head, mm 1.4 (-0.05..+0.00)
4 Angle of field of view (without protection enclosure), deg > 120
5 Diameter of enclosure, mm ≤ 7
6 Length of enclosure (without wires), mm ≤ 12
7 Supply voltage, V u₁= +15±1,5 u₂= -15±1,5
8 Power consumption, W ≤ 0,36
9 Operating temperature, °C +10 ... +30
10 Material of sensor LiTaO₃

Note: material of the window and size of sensor canbe customized on request (Ge, ZnSe, quartz, BaF₂, CaF₂,KPS-5).