探测器是由带有硫化铅光敏层的玻璃杜瓦瓶组合件和插入此杜瓦瓶中的节流膨胀微型制冷器组成,如图1。图1探测器示意图高压气体从毛细管喷咀喷出,膨胀吸热。膨胀后的气体通过热交换器,予冷管内工作气体后从排气孔排出,使元件的温度降至工 The detector consists of a glass dewar assembly with a lead sulphide photoactive layer and a throttled expanded miniature cooler inserted into the dewar as shown in Figure 1. Figure 1 Schematic of the detector High pressure gas is ejected from the capillary nozzle and expanded to absorb heat. After the expansion of the gas through the heat exchanger, to the working gas in the cold pipe after discharge from the exhaust hole, the temperature dropped to the component