Optical Solar Reflector

Optical Solar Reflector

An Optical Solar Reflector (OSR) consists of a top layer made out of quartz, over a reflecting layer made of metal.

OSR is used for radiators on space craft. The quartz outer layer lets the solar light through which reflects on the metal layer. This results in a low absorption coefficient. The quartz layer is a good IR emitter. The result of these properties is a good emitting, low absorbing material. Thus making it a "cold material".

Optical Solar Reflectors are a type of Second Surface Mirror (SSM)



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