Finite conjugate projection lens system

Details Finite conjugate projection lens system Finite conjugate projection lens system

1989-08-21

1991-02-12

Sugarman, Scott J.

G02B 940, G02B 950, G02B 954

Patent

active

049919466

ABSTRACT:
A disclosed lens system is an atypical Gaussian-type lens comprised of two lens groups located at opposite sides of an aperture stop. Each of the groups is comprised of a doublet and a singlet. The doublets and singlets are located in sequential asymmetry with respect to the aperture stop. The front group has a cemented doublet as its foremost object-side lens component. This doublet consists of a lens element of negative power followed by a lens element of a positive power.

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patent: 4426137 (1984-01-01), Mori
patent: 4671627 (1987-06-01), Shinohara
patent: 4773746 (1988-09-01), Arai
patent: 4784480 (1988-11-01), Yokota et al.

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