Mirrors with a variable focal distance
US4119366A · kind A · utility
23Cited by
3References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 2, 1976 |
| Grant date | Oct 10, 1978 |
| Priority date | — |
| Expiry date | Dec 2, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B26/0825
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Mirrors with a variable focal distance composed of a disc of revolution about an axis having a reflecting surface. Said disc has a variable thickness and is bent elastically by applying thereto a distributed load or an axial load and by balancing this load by a central or peripheral bearing pressure. The deformation obtained is parobolic provided that the variable thickness of the disc varies as a function of the radius from the axis. One application of the present invention is the manufacture of mirrors with a variable focal distance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.