Frost-prevention film system of large-aperture reflecting optic infrared telescope used in extremely low temperature environment and preparation method thereof
US10359621B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 29, 2016 |
| Grant date | Jul 23, 2019 |
| Priority date | — |
| Expiry date | Jul 31, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B7/183
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.