Abstract
The imaging and ultra-sensitive detection of infrared radiation for cryogenic target in space and deep space exploration have significant application value. The radiation intensity of the target below 300 K is quite faint, whose corresponding characteristic radiation wavelength is very long. Blocked impurity band (BIB) detectors are one of the most important members in far-infrared detectors, with advantages of wide spectrum coverage, high sensitivity, low dark current, good resistance to cosmic particle radiation and capable of meeting the stringent requirements of astronomical exploration in far-infrared waveband. Getting start from the demands of infrared astronomical detection, this article represents the current status and progress on infrared astronomy, infrared detectors for astronomy and the blocked impurity band detectors. Additionally, the device structure and simplified physical model of BIB detectors are well-covered.
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