Aperture switching device
US5946515A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 7, 1998 |
| Grant date | Aug 31, 1999 |
| Priority date | — |
| Expiry date | Aug 7, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B9/02
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An aperture switching device to be incorporated in a digital cameral for moving an aperture plate having an aperture formed thereon with respect to a lens between a shutting position where the lens is partially covered by the aperture plate with the aperture aligned with the lens and an open position where the lens is not covered by the aperture plate, includes a slide block formed on the aperture plate, a guide member mounted to the lens and having a guide channel to slidably receive the slide block therein. A driving device has an output rod movable along an arc path and mechanically coupled to the aperture plate to reciprocate the slide block along the guide channel so as to move the aperture plate between the shutting position and the open position. The mechanical coupling between the driving device and the aperture plate may include a pinion rotated by the driving device and engaged by a rack provided on the aperture plate. Alternatively, the mechanical coupling may include a transverse channel formed on the aperture plate to receive the output rod of the driving device therein. The transverse channel extends in a direction substantially normal to the movement of the aperture …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.