Filter holder
US5227925A · kind A · utility
2Cited by
7References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 19, 1992 |
| Grant date | Jul 13, 1993 |
| Priority date | — |
| Expiry date | May 19, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B7/006
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A filter holder according to the present invention is provided with a frame installed in a freely mountable and detachable manner in a lens barrel. A female screw formed on one side of the frame in the direction extending along the optical axis of the lens barrel and set by screwing in a male screw of a screw type filter. A plate spring installed on the other side of the frame along the extending direction of the optical axis of the lens barrel mentioned above, is capable of holding a film-shaped filter therein, between the other side surface of the frame and the plate spring.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.