Lightweight mirror blanks by deposition
US8602576B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 29, 2010 |
| Grant date | Dec 10, 2013 |
| Priority date | — |
| Expiry date | Dec 20, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B7/182
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An improved method for forming inexpensive, lightweight, closed-back, silicon carbide mirrors, via chemical vapor deposition (CVD) or chemical vapor composites (CVC), is achieved by using a two dimensional corrugated core with sloped walls. All layers in this design are chemical vapor deposited optical grade silicon carbide. Seamless cohesion between layers is achieved by depositing the material on the sloped walls of, and through holes in, the mandrel. The resulting structure is cohered and monolithic. The mandrels are matched in coefficient of thermal expansion (CTE) to the deposited material. Mandrels that support the layers are later removed by a separate process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.