Helmet mounted display

Details Helmet mounted display Helmet mounted display

1990-10-26

1992-11-17

Arnold, Bruce Y.

Optical: systems and elements

Holographic system or element

Head up display

359 14, 359 24, 359 34, 359630, G02B 532

Patent

active

051648482

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.

REFERENCES:
patent: 3711177 (1973-01-01), Ward
patent: 3754814 (1973-08-01), Leith
patent: 4349815 (1982-09-01), Spooner
patent: 4361384 (1982-11-01), Bosserman
patent: 4372639 (1983-02-01), Johnson
patent: 4398799 (1983-08-01), Swift
patent: 4468101 (1984-08-01), Ellis
patent: 4799765 (1989-01-01), Ferrer
patent: 4874214 (1989-10-01), Cheysson et al.
Patent Abstracts of Japan (JP 63-187,215), vol. 12, No. 468 (p-797) (3315), Dec. 8, 1988.
Patent Abstracts of Japan (JP 59-126,503), vol. 8, No. 254 (p-315) (1691), Nov. 21, 1984.

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