Image display apparatus with increased raster scan rate of laser beams
US5148285A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 15, 1989 |
| Grant date | Sep 15, 1992 |
| Priority date | — |
| Expiry date | Dec 15, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B26/129
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An image display apparatus having light beam sources for generating light beams, an optical modulator for modulating the light beams by image signals to be projected, a deflection device for deflecting the modulated light beams, the deflection device including a polygon mirror and an auxiliary reflection mirror provided near the polygon mirror such that the modulated light beams are reflected from the polygon mirror to said auxiliary reflection means and back toward the polygon mirror, a device for supplying the modulated light beams to the polygon mirror with predetermined angles relative to a rotational plane of the polygon mirror, such that the modulated light beams incident upon the polygon miror are reflected a plurality of times by the polygon mirror, and a projection device for projecting the modulated and deflected light beams from the deflection device on a screen or the like.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.