Stereoscopic motion picture-circular to linear scan translator (alternate screen)-method and apparatus
US4349252A · kind A · utility
Inventor
Key dates
| Filing date | Jan 5, 1981 |
| Grant date | Sep 14, 1982 |
| Priority date | — |
| Expiry date | Jan 5, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B35/00
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
My invention relates to photographing scenes with a standard motion picture camera in which there is a relative motion between the scene and camera with the purpose of stereoscopic viewing of the motion picture without the need for viewing aids at the eye. The system is compatible with scenes photographed without this relative motion but the reproduction is flat. The film (or other appropriate media) is arrayed in a vertical plane and constrained to move horizontally around a segment of a circle of radius 2R. At the center of the film circle is a film motion compensator which can be a multi-faceted mirror drum of radius R. The film is rapidly scanned about the center of this circle by a scan projector. Projection optics on the projector, project the sequential film frames onto a relatively large circular cylindrical semi-specular screen. The screen is constructed of horizontal corrugated ridges to cause the incident projection rays to vertically scatter and horizontally reflect such that all rays for a given projection location on the projection circle, will converge to a vertical aerial exit slit. The exit slit locus is essentially linear while the projector moves in a circular ar…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.