Helmet mounted display
US5164848A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 26, 1990 |
| Grant date | Nov 17, 1992 |
| Priority date | — |
| Expiry date | Oct 26, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2027/0174
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A holographic objective system (3) produces an intermediate real image (4) of information displayed on an electrically addressable spatial light modulator or SLM (1), the real image (4) being collimated by a powered holographic reflector (5) constructed as part of the visor of a helmet worn by the viewer (9). The SLM (1) is illuminated by laser light from a remote laser (8) via a single optical fibre (6) and beam splitter (2). A diffuser (7) is provided either between the laser and the beam splitter or in the plane of the intermediate image (4). The objective system (3) may alternatively include, or consist entirely of, conventional optical elements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.