Double directional image development head-up display optical sys

Details Double directional image development head-up display optical sys Double directional image development head-up display optical sys

1991-04-25

1992-07-28

Henry, Jon W.

Optical: systems and elements

Single channel simultaneously to or from plural channels

By partial reflection at beam splitting or combining surface

359634, 359742, G02B 2714

Patent

active

051345200

ABSTRACT:
A double directional image development HUD includes a combiner having individual spectral distributions perfectly separated from each other, wherein the image displayed on an LCDU is formed using green light with a sharp spectral distribution and using another color light with a different wavelength, and wherein light beams projected from the LCDU onto a combiner are perfectly divided into two beams, i.e., a reflection light beam and a transmission light beam both of which are perfectly separated from each other, thereby obtaining a clear projected image to be observed by the observers inside and outside the combiner without any contamination.

REFERENCES:
patent: 3840289 (1974-10-01), Day
patent: 4266854 (1981-05-01), Avicola
patent: 4269475 (1981-05-01), Ellis
patent: 4368950 (1983-01-01), Sakamoto
patent: 4616217 (1986-10-01), Nesbitt et al.
patent: 4714320 (1987-12-01), Ellis
patent: 4714320 (1987-12-01), Banbury
patent: 4930865 (1990-06-01), Dosmann
1980 SID International Symposium Digest of Technical Papers; Apr., 1980; Lewis Winner, Coral Gables, Fla. 33134; 6.3/3:00 P.M.: Diffraction Optics Heads-Up Display Technology; Martin Weihrauch et al.; Hughes Aircraft Company; El Segundo, Calif.

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