Based on athermal design technologies of optical passive mode, this paper describes an example of a cooled long wave infrared optical system.
采用光学被动式无热化设计方法，给出了针对长波红外制冷型光学系统的一个设计实例。
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In order to avoid such accident, a warning system using passiveinfrared target detection was developed. It can search body targets in the mine cars and give sound and light warning as well.