Shutter mechanism
US4355272A · kind A · utility
3Cited by
6References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 9, 1979 |
| Grant date | Oct 19, 1982 |
| Priority date | — |
| Expiry date | Oct 9, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B9/58
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A shutter is rotatably mounted in a housing for opening and closing a shutter aperture in the housing. The shutter is coupled to a drive unit for unidirectionally rotating the shutter with the same velocity profile to open and close the shutter aperture during each exposure period. This drive unit includes a drive motor and a control circuit having a source of position and velocity reference data and a feedback control loop configurable for either position or velocity control of the shutter as determined by a control command.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.