Color head-up display system

Details Color head-up display system Color head-up display system

1992-05-22

1993-04-06

Sikes, William L.

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

359 53, 359 63, 359 65, 359 70, 359 94, 340705, 353 31, 358 60, G02F 113, G09G 302, H04N 931

Patent

active

052008444

ABSTRACT:
A field sequential color head-up display system includes image generating means including a source of light of at least two different wavelengths. A color selective polarizing filter having first and second absorption axes, enables the passage of linearly polarized light of first and second colors. Optical retardation imposed by variable optical retarding means determines the color of the light transmitted by circular polarizing means. Image collimating means apply a generated image of selected colors to an image combiner placed in the line of sight between an observer and a scene, thereby superimposing a generated image over the scene visible to the observer. Holographic elements tuned to the selected wavelengths improve reflection of those wavelengths to the observer.

REFERENCES:
patent: 3781465 (1973-12-01), Ernstoff et al.
patent: 4001499 (1977-01-01), Dowell
patent: 4328493 (1982-05-01), Shanks et al.
patent: 4756604 (1988-07-01), Nakatsaka et al.
patent: 4991941 (1991-02-01), Kalmanash
patent: 5050966 (1991-09-01), Berman

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