Directional diffusing screen with suppressed zero-order light

Details Directional diffusing screen with suppressed zero-order light Directional diffusing screen with suppressed zero-order light

1982-07-30

1986-05-06

Arnold, Bruce Y.

350 9627, G02B 532

Patent

active

045867801

ABSTRACT:
Optical assembly (34) has a transmission holographic optical element (46) which refracts the incoming ray (38) at an angle through the angularly oriented fiber (56) in fiber optic faceplate (48). Holographic optical element (50) refracts the ray (66) to become ray (44) toward a viewing pupil. The zero-order light from holographic optical element (46) is absorbed as ray (68) in the fiber optic faceplate. The zero-order light represented by ray (76) is absorbed in the holographic optical element (50). Holographic optical element (50) preferably forms a diffused viewing pupil for inspection of the light by the user.

REFERENCES:
patent: 3043910 (1962-07-01), Hicks, Jr.
patent: 3580655 (1971-05-01), Leith et al.
patent: 3708217 (1973-01-01), McMahon
patent: 3907403 (1975-09-01), Maeda
patent: 4118106 (1978-10-01), Leith
patent: 4189207 (1980-02-01), Fisher et al.
patent: 4215924 (1980-08-01), Matsumoto
IBM Technical Disclosure Bulletin, vol. 23, No. 2, issued Jul. 1980 (New York)--G. T. Sincerboy et al., "System to Increase the Efficiency of the Holographs Energy Distribution for Individual Chip Replacement", pp. 831-832.

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