由于航天技术的发展,机载、弹载、星载遥感仪器也发展了,特别是遥感仪器中的各种红外探测器,如测辐射热计,红外辐射照象机,红外成象器以及光子探测器和冷参放大器等都投入了使用,而这些仪器的敏感元件又要求相应的低温条件。如表1所示,由于遥感仪器在空间使用,对空间致冷器提出许多特殊要求:(1)在失重条件下,不发生泄漏现象;(2)有很高的机械强度,能耐住火箭发射时大到150g 加速度的冲击,并抗住振动;(3)结构紧凑,体积小,重量轻,功耗小;(4)寿命长,足够宇航器飞行的使用;(5)若敏 Due to the development of aerospace technology, airborne, missile-borne and spaceborne remote sensing instruments have also been developed. In particular, various infrared detectors in remote sensing instruments, such as bolometers, infrared radiation cameras, infrared imagers and photons Detectors and cold-amp amplifiers have been put into use, and the sensitive components of these instruments also require the corresponding low-temperature conditions. As shown in Table 1, due to the use of remote sensing instruments in space, space cryostats are proposed with many special requirements: (1) no leakage occurs under conditions of weight loss; (2) high mechanical strength, capable of withstanding rocket launches Up to 150g acceleration impact and anti-vibration; (3) compact structure, small size, light weight, low power consumption; (4) long life, enough space flight use; (5)