Cinematic film projector
US6296359A · kind A · utility
1Cited by
5References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 17, 1999 |
| Grant date | Oct 2, 2001 |
| Priority date | — |
| Expiry date | Sep 17, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B9/10
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In a cinematic film projector a light source projects light through a single, non-centric light transparent transmission window formed in a rotary shutter, and through an image window and an image of a film which passes step by step past the image window for projection by a projector lens onto a cinema screen. In order to obtain a higher image frequency, the rotary shutter is made of light transparent material that is coated so that light passes through only its single light transmission window. Thereby the rotary speed of the rotary shutter can be significantly increased.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.