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水手号Ⅱ和Ⅳ的成功飞行证明了其光学系统在行星际空间暴露几个月后仍能正常工作,对于设计者来说深空问题必须予以特殊的考虑。在深空中的固体材料的升华现象及其磨损影响着光学系统所有材料的选择(包括金属材料及有机化合物)。这里描述三个热设计的基本不同途径可提供给设计者参考,每种方法都可在大温差内保持聚焦。微流星体和辐射的损害不是主要问题。同时也将描述水手号Ⅳ电视像机光学系统热设计和材料的选择。
The successful flight of Sailor II and IV proved that their optical system can still work normally for a few months after interplanetary exposure. Deep space issues must be specially considered by designers. Sublimation of solid materials in deep space and their wear and tear affect the choice of all materials in the optical system (including metallic materials and organic compounds). There are basically three different ways to describe the three thermal designs available to the designer, each of which maintains focus over a wide temperature range. Micrometeor and radiation damage is not a major problem. Will also describe the Sailor IV TV camera optical system thermal design and material selection.