Nanjing Inst of Astronomical Optics & Tech Nat Astronomical Observatories Chinese Acad of Science

Xinnan Li

Jie Tian

Jinfeng Wang

Yeru Wang

A frost-prevention film system of a large-aperture reflecting optic infrared telescope used in an extremely low temperature environment and a preparation method thereof is disclosed. The frost-prevention film system has the following structure: a transparent conducting film layer, an intermediate insulation layer, a reflecting film layer and an outermost medium protection layer in sequence from a main telescope mirror surface, wherein both sides of the transparent conducting film layer are provided with conducting electrodes. The steps are as follows: (1) a preparation step; (2) a step of plating a conducting film; (3) a step of plating an intermediate insulation layer; (4) a step of plating a reflecting film layer; (5) a step of plating an outermost medium protection layer; and (6) a step of plating conducting electrodes.

Frost-prevention film system of large-aperture reflecting optic infrared telescope used in extremely low temperature environment and preparation method thereof

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Jiangsu, China

Xinnan Li