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在中等致冷温度(190～270K)下工作的红外探测器正在夜视、机载跟踪系统、舰载跟踪器和夜间观测装置上得到越来越多的应用。硫化铅、硒化铅、光电导碲镉汞和光伏碲镉汞单元探测器及阵列很适用于这些系统,而温差电致冷器则是产生这些探测器所需工作温度的一种常规方法。致冷器、封装和探测器的最新进展,已使整个工艺达到了高可靠性、长真空寿命和较高探测器灵敏度的水平。本文所述的一些选择方案和折衷方案有利于系统设计者使用温差电致冷的红外探测器。
Infrared detectors operating at intermediate cooling temperatures (190-270K) are gaining more and more applications in night vision, airborne tracking systems, shipborne tracker and night-time observation devices. Lead sulfide, lead selenide, photoconductive cadmium telluride, and photovoltaic cadmium telluride cell detectors and arrays are well suited for these systems, and thermoelectric coolers are a common method of creating the operating temperatures required for these detectors. Recent advances in chillers, packaging, and detectors have enabled the entire process to achieve high levels of reliability, long vacuum life, and high detector sensitivity. Some of the options and trade-offs described in this article are for system designers to use thermoelectric cooled infrared detectors.