Taking lens system

Details Taking lens system Taking lens system

1997-03-24

1999-02-16

Sugarman, Scott J.

Optical: systems and elements

Lens

With variable magnification

G02B 1514

Patent

active

058726608

ABSTRACT:
The object of the present invention is to provide a taking lens system that has an exit pupil located at or close to infinity and has a short total length. In order to achieve said object, the present invention comprises, from the object side, a main optical system comprising a first lens unit having a negative refractive power and a second lens unit having a positive refractive power, and a condenser lens that is located between said main optical system and the image plane and has a positive refractive power.

REFERENCES:
patent: 4838666 (1989-06-01), Shiraishi
patent: 5015077 (1991-05-01), Ueda
patent: 5262897 (1993-11-01), Kawamura
patent: 5550679 (1996-08-01), Sugawara

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