Semi-fixed astronomical mirrors and aspherical gratings and methods for manufacturing same by elastic flexion
US4382657A · kind A · utility
15Cited by
3References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 17, 1980 |
| Grant date | May 10, 1983 |
| Priority date | — |
| Expiry date | Dec 17, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S359/90
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The invention relates to astronomical mirrors or aspherical gratings which are obtained from a blank which is composed, in one piece, of a thin disc having a reflecting surface and of a cylindrical ring coaxial with the disc which is connected thereto by a semi-fixing. The ring is applied on a rigid support with which it defines a cavity in which a pressure pi is applied while the reflecting face is surfaced along a plane or spherical surface. The pressure pi is then varied, this causing a flexion of the disc.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.