Laser illuminated image projection system and method of using same
US5704700A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 24, 1995 |
| Grant date | Jan 6, 1998 |
| Priority date | — |
| Expiry date | Jul 24, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/3161
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The laser illuminated image projection system includes a microlaser array coupled with a beam shaper to produce an exceptionally bright projection light beam. In one embodiment, the beam shaper includes a binary phase plate to modify the shape and intensity profile of the projection light beam. In another embodiment, the beam shaper includes a microlens array arrangement. In yet another embodiment, the beam shaper includes a diffuser arrangement. A light valve modifies the projection light beam to generate an output light beam indicative of an image. A projection lens arrangement focuses the output light beam onto a remote surface to reproduce the image thereon.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.