Fresnel lens in an improved infinity image display system

Details Fresnel lens in an improved infinity image display system Fresnel lens in an improved infinity image display system

1982-05-20

1988-02-02

Buczinski, Stephen C.

G02B 308

Patent

active

H00004235

ABSTRACT:
A fresnel lens employs a design that reduces the transmission of stray light to a viewer located at its entrance pupil, said design requiring directional undercutting of selected facets of the lens so as to align the directionally undercut nonimaging surface parallel to the viewer's line of sight. The facets of the lens are arcuately shaped to yield a closer approximation to a glass lens. The lens is of particular use in a visual image display system.

REFERENCES:
patent: 2751816 (1956-06-01), Strong
patent: 3623789 (1971-11-01), Kawazu et al.
patent: 3784282 (1974-01-01), Yamazaki et al.
patent: 4391495 (1983-07-01), Mazurkewitz
Cox, Application of Fresnel Lenses to Virtual Image Display, 8/1978, SPIE, ol. 162.

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