3-D motion picture projection apparatus
US4971435A · kind A · utility
25Cited by
43References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 8, 1989 |
| Grant date | Nov 20, 1990 |
| Priority date | — |
| Expiry date | Sep 8, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B35/16
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In an alternate eye 3-D motion picture projection apparatus of the rolling loop type, light projection is accomplished by the combination of focal plane shutters that are coupled to the rotor of the projector and a supplementary shutter arrranged to trim the projected light so that discrete "left eye" and "right eye" images are projected. Various embodiments are disclosed in which a rotary blade shutter is located at the stop of the projection lens. Where there are two projection lenses, a single blade or two counter-rotating blades trim the light projected through both lenses.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.