Viewfinder optical system

Details Viewfinder optical system Viewfinder optical system

1997-10-03

1999-10-12

Nelms, David

Optical: systems and elements

Lens

Eyepiece

359661, 359743, 359569, 359565, 359571, 396382, G02B 308, G02B 2102, G02B 518, G03B 300

Patent

active

059662441

ABSTRACT:
An eyepiece lens has a single lens element having a positive optical power, and the single lens element has a refractive power of an aspherical surface and a diffractive power. The eyepiece lens satisfies the following condition:

REFERENCES:
patent: 5044706 (1991-09-01), Chen
patent: 5148314 (1992-09-01), Chen
patent: 5206675 (1993-04-01), Miyauchi et al.
patent: 5446588 (1995-08-01), Missig et al.
patent: 5548439 (1996-08-01), Smith

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