Light-intercepting device in a camera
US4298265A · kind A · utility
5Cited by
2References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 23, 1980 |
| Grant date | Nov 3, 1981 |
| Priority date | — |
| Expiry date | May 23, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B9/18
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In a light-intercepting device in a camera including a plurality of flat light-intercepting vanes disposed on a light-intercepting plane crossing an optical path, the light-intercepting vanes comprise a substrate formed of titanium or a titanium alloy, and a hardened layer of titanium compound formed on the surface of the substrate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.