Super-wide field eyepiece

Details Super-wide field eyepiece Super-wide field eyepiece

1994-08-04

1996-11-26

Sugarman, Scott J.

Optical: systems and elements

Lens

Eyepiece

359645, G02B 2500

Patent

active

055791670

ABSTRACT:
A super-wide field eyepiece comprises, in succession from the incidence side of light, a first lens unit including a meniscus lens having its convex surface facing the incidence side and having positive or negative weak refractive power as a whole, a second lens unit including at least one lens surface having negative refractive power and having positive refractive power as a whole, and a third lens unit including at least two positive lenses and having positive refractive power as a whole, and an intermediate image is formed between the first lens unit and the second lens unit.

REFERENCES:
patent: 4747675 (1988-05-01), Nagler
patent: 5227918 (1993-07-01), Suzuki et al.
patent: 5255121 (1993-10-01), Suzuki

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