Notched adjustable aperture
US7194169B2 · kind B2 · utility
6Cited by
1References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 30, 2003 |
| Grant date | Mar 20, 2007 |
| Priority date | — |
| Expiry date | Dec 30, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B26/0841
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An adjustable aperture system includes a stationary aperture operable to remove a portion of a lower intensity light communicated through a light bundle. The system also includes an adjustable aperture comprising a notch and capable of varying an amount of projection light communicated through the light bundle. In one particular embodiment, the notch operates to reduce the effect of the adjustable aperture on a high intensity light communicated through the light bundle. The system further includes a control motor operable to receive a control signal and to selectively manipulate the adjustable aperture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.