Emission angle variable flash apparatus
US5734934A · kind A · utility
39Cited by
0References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 16, 1996 |
| Grant date | Mar 31, 1998 |
| Priority date | — |
| Expiry date | Sep 16, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B2215/0528
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An emission angle variable flash apparatus of the invention alters an angular aperture to be formed by side reflection plates disposed oppositely to both side surfaces of a reflector in linkage with a change of a distance between a Xe tube and a reflector on their optical axis, thereby enhancing the efficiency of utilization of flash from a light source and expanding a variable range of an emission angle in the horizontal direction. As a result, the emission angle variable flash apparatus of the invention is made smaller in size than in the prior art.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.