The pyroelectric linear array comprises a lithium tantalate chip with 128, 256 or 510 elements. The signals produced by the elements are processed in a CMOS circuit. Signal processing is carried out by the analogue circuitry, which comprises a multiplexer, an output amplifier and an adapted low-noise preamplifier for each pixel. The pyroelectric chip and CMOS readout circuit are located on a thick film substrate, which is mounted inside a hermetic metal housing. The incident radiation passes through a window which is transparent to infrared wavelengths, and reaches the sensitive elements.
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