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2. 发明授权

US5423185A High efficiency reflective optical system 失效
标题翻译：高效反射光学系统
公开(公告)号：US5423185A
公开(公告)日：1995-06-13
申请号：US87829
申请日：1993-07-06
申请人： Eddie M. Leung , David D. Madura
发明人： Eddie M. Leung , David D. Madura
IPC分类号： F17C13/00 , G02B5/08 , G05D23/19 , F25B19/00
CPC分类号： G02B5/0808 , G02B5/0816 , G02B5/0875 , G05D23/192 , Y10S505/888
摘要： Highly efficient reflective optical system that perfectly reflects incident electromagnetic radiation of a certain spectra and almost perfectly reflects radiation of another spectra. Incident electromagnetic radiation having a wavelength above a critical wavelength is relatively perfectly reflected. The critical wavelength is determined by the critical temperature of a high temperature superconductor material incorporated in the optical system. A preferred embodiment includes a cryogenically cooled substrate to which is applied a coating of a noble metal such as silver. A layer of a high temperature superconductor material is applied over the coating of noble metal. Since the critical wavelength of the incident radiation is inversely proportional to the critical temperature of the superconducting material, the use of high temperature superconductor material in the optical system provides a critical wavelength whereby certain spectra of an incident radiation is perfectly reflected. Since the effective emissivity of the optical system is very low for the same reason, the radiation heat transfer to cold objects (colder than the critical temperature of the superconductor) can be substantially decreased. Applications for such highly reflective optical systems provide for reducing radiation heat transfer for the tanks containing cryogens in space vehicles, for internal radiation shields for cryogenic dewars, as radiation insulation for lunar or orbiting space stations, to produce a thermal radiation shield for superconducting magnet systems, and as components in special purpose optical systems.
摘要翻译：高效的反射光学系统完美地反映了一定光谱的入射电磁辐射，几乎完美地反映了另一光谱的辐射。具有高于临界波长的波长的入射电磁辐射被相对完美地反射。临界波长由结合在光学系统中的高温超导体材料的临界温度决定。优选的实施方案包括低温冷却的基质，其上涂覆有贵金属如银的涂层。将一层高温超导材料涂覆在贵金属涂层上。由于入射辐射的临界波长与超导材料的临界温度成反比，所以在光学系统中使用高温超导体材料提供临界波长，从而完全反射入射辐射的某些光谱。由于相同的原因，由于光学系统的有效发射率非常低，因此可以显着降低对冷物体的辐射热传递（比超导体的临界温度更低）。对于这种高反射光学系统的应用提供了减少在空间车辆中含有冷冻剂的罐的辐射热传递，用于低温杜瓦瓶的内部辐射屏蔽，作为月球或轨道空间站的辐射绝缘，以产生用于超导磁体系统的热辐射屏蔽，作为专用光学系统的组件。

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