Focal plane shutter unit having three plates
US6036378A · kind A · utility
1Cited by
2References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 23, 1997 |
| Grant date | Mar 14, 2000 |
| Priority date | — |
| Expiry date | Jan 23, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B9/18
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A focal plane shutter unit includes two pairs of blade units consisting of a plurality of light shielding thin plates, a first plate having a first aperture, a second plate having a second aperture, disposed in a face-to-face relationship with the first plate, and having a part of a film passage path in a surface opposite to the surface on which the first plate is disposed, and a blade housing unit for housing the two pairs of blade units disposed in between the first plate and the second plate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.