Controlled focus mirror with rim controlled flexure
US4059346A · kind A · utility
18Cited by
0References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 30, 1976 |
| Grant date | Nov 22, 1977 |
| Priority date | — |
| Expiry date | Jun 30, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B26/0825
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A variable focus mirror comprising a uniform elastic disk having a mirror finish on one face thereof, which is urged against an annular fulcrum concentric with the disk by a uniform force applied at the rim of the disk. This force causes the flat disk to be flexed into a substantially spherical, nearly parabolic shape. The magnitude of the force applied controls the degree of flexure and hence the focal length of the spherical mirror. For laser beam focusing the materials are selected to be able to withstand the laser energy being reflected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.