Wide field eyepiece

Details Wide field eyepiece Wide field eyepiece

1995-06-02

1997-06-10

Sugarman, Scott J.

Optical: systems and elements

Lens

Eyepiece

359646, G02B 2500

Patent

active

056382138

ABSTRACT:
An eyepiece having an apparent field of view of 40.degree. or greater which is provided, in succession from the eye point side, with a first lens unit G1 having positive refractive power as a whole, and a second lens unit G2 having negative refractive power as a whole and having a cemented negative lens disposed with a virtual image formed by the eyepiece interposed between itself and the first lens unit G1, satisfies the following conditions:

REFERENCES:
patent: 4747675 (1988-05-01), Nagler

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