Hud with a spectral contour dielectric combiner

Details Hud with a spectral contour dielectric combiner Hud with a spectral contour dielectric combiner

1994-08-08

1996-11-19

Epps, Georgia Y.

Optical: systems and elements

Single channel simultaneously to or from plural channels

By partial reflection at beam splitting or combining surface

359629, 359634, G02B 2714

Patent

active

055768865

ABSTRACT:
An aircraft head-up display with a combiner using a thin film dielectric reflector with a contoured reflectance spectrum of a narrow bandwidth that matches the spectrum of the light output of a cathode-ray tube whose phosphors produce a narrow bandwidth light output used to create visual data for display to the pilot. The dielectric combiner is constructed with a dielectric coating made up of ion deposited layers, with alternate layers having different indices of refraction and possibly different thicknesses near one quarter wavelength thick. The resultant combiner transmits ambient light essentially without attenuation at all visible light frequencies except those frequencies of the visual data produced by the CRT phosphors, which are reflected into superposition with the background viewable through the combiner.

REFERENCES:
patent: 3778548 (1973-12-01), Nistri
patent: 4652870 (1987-03-01), Steward
patent: 4655540 (1987-04-01), Wood
patent: 4669810 (1987-06-01), Wood
patent: 4763990 (1988-08-01), Wood
patent: 4775218 (1988-10-01), Wood
patent: 4799765 (1989-01-01), Ferrer
patent: 4832449 (1989-05-01), Mundy
patent: 5194989 (1993-03-01), Ferrante
patent: 5249081 (1993-09-01), Rogers
patent: 5299063 (1994-03-01), Fritz

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