WANG Shi-tao, ZHANG Wei, WANG Qiang. Measurement for detectivity of infrared detectors in low temperature background[J]. Editorial Office of Optics and Precision Engineering, 2012,(3): 484-491
WANG Shi-tao, ZHANG Wei, WANG Qiang. Measurement for detectivity of infrared detectors in low temperature background[J]. Editorial Office of Optics and Precision Engineering, 2012,(3): 484-491 DOI: 10.3788/OPE.20122003.0484.
Measurement for detectivity of infrared detectors in low temperature background
To support the correct design of cryogenic optical systems
a measuring system for the detectivity of infrared detectors in low temperature background was established and applied to some infrared detectors for testing their detection characteristics. First
the theoretical analysis for noise and response characteristics of an infrared acquisition system was introduced
and the relationship between the design of a low temperature optical system and the detectivity of infrared detector in the low temperature background was established. Then
a measurement system of detectivity in the low temperature background based on thermal vacuum enviroment was proposed
and experimental research on some infrared detectors in the low temperature background was accomplished. Finally
the variation regularities of limiting integration time and detectivity in low temperature compared with those in normal temperature case were discussed as well. Experimental results indicate that both of the integration time and detecitivity in the low temperature background are 20 times that in normal temperature background. The regularity derived can satisfy the requirments of system index design of low temperature optical systems.
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