Eyepiece lens

Details Eyepiece lens Eyepiece lens

1996-01-17

1997-11-18

Nelms, David C.

Optical: systems and elements

Lens

Eyepiece

359647, 359718, 359726, 359796, G02B 2500, G02B 302, G02B 1700, G02B 900

Patent

active

056893736

ABSTRACT:
An eyepiece lens of the present invention and is arranged in a real image mode finder optical system consists essentially of a single positive meniscus lens convex on the object side having an object side surface and a pupil side surface, each of which is aspherical. This invention provides a compact eyepiece lens having a long optical path length from an image plane to the eyepiece lens, a large diameter of the exit pupil and a short focal length.

REFERENCES:
patent: 3508811 (1970-04-01), Yoshida
patent: 5136427 (1992-08-01), Sugawara
patent: 5191477 (1993-03-01), Abe et al.
patent: 5225927 (1993-07-01), Nozaki et al.
patent: 5313327 (1994-05-01), Ito et al.

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