Imaging lens system comprising a distributed index lens and a pl

Details Imaging lens system comprising a distributed index lens and a pl Imaging lens system comprising a distributed index lens and a pl

1986-05-28

1989-08-01

Corbin, John K.

G02B 300

Patent

active

048529818

ABSTRACT:
An imaging lens system including a distributed index lens which has planar opposite end surfaces and in which the index gradient near the optic axis is substantially zero and the refractive index becomes progressively higher from the optic axis toward the marginal portion, and a plano-convex lens having a planar surface on the side thereof which is adjacent to the distributed index lens and formed of a homogeneous medium.

REFERENCES:
patent: 3486808 (1969-12-01), Hamblen
patent: 4639094 (1987-01-01), Aono
patent: 4647159 (1987-03-01), Baba
patent: 4674843 (1987-06-01), Baba et al.
patent: 4696552 (1987-09-01), Hattori et al.
patent: 4723843 (1988-02-01), Zobel
patent: 4755039 (1988-07-01), Hattori
patent: 4762403 (1988-08-01), Hattori
patent: 4770506 (1988-09-01), Baba
Article in Camera International, No. 4, Apr. 1965, pp. 36-37.

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