Diffraction optics diffusing screen
US4586781A · kind A · utility
36Cited by
8References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 30, 1982 |
| Grant date | May 6, 1986 |
| Priority date | — |
| Expiry date | Jul 30, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/32
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Optical apparatus (48) includes the holographic optical element (16) which diffracts the incoming ray (15) in a diffuse cone toward a viewing pupil and at an angle parallel to the axis of fiber optic faceplate (48) so the central ray (17) of the diffused cone passes through optical fiber (54) toward the viewing pupil. This permits the zero-order undiffracted light in ray (25) to be absorbed in the fiber optic faceplate (48).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.