Temperature compensated exposure control apparatus for a camera
US4000498A · kind A · utility
3Cited by
7References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 11, 1975 |
| Grant date | Dec 28, 1976 |
| Priority date | — |
| Expiry date | Apr 11, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B7/083
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An exposure control apparatus which can set accurate shutter speed constantly irrespective of changes in ambient temperature and which can eliminate not only an error in shutter speed caused by an expansion semiconductor element but also an error in shutter speed caused by the variation in output characteristics due to variation in temperature of a compression circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.