Viewfinder optical system

Details Viewfinder optical system Viewfinder optical system

1997-04-16

1999-11-02

Epps, Georgia

Optical: systems and elements

Lens

359643, 359644, 359645, 396373, 396374, 396375, G02B 300, G02B 2500, G02B 1302

Patent

active

059781459

ABSTRACT:
A viewfinder optical system has a relay lens system and an eyepiece optical system. The relay lens system refocuses a primary image as a secondary image. The relay lens system consists of a single lens element which has a surface having optical power of diffraction. The eyepiece optical system magnifies the secondary image and has a surface having optical power of diffraction.

REFERENCES:
patent: 5044706 (1991-09-01), Chen
patent: 5148314 (1992-09-01), Chen
patent: 5446588 (1995-08-01), Missig et al.
patent: 5715090 (1998-02-01), Meyers

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