Imaging optical system having a distributed index lens

Details Imaging optical system having a distributed index lens Imaging optical system having a distributed index lens

1985-04-04

1988-08-09

Corbin, John K.

350479, G02B 904, G02B 300

Patent

active

047624035

ABSTRACT:
An imaging lens formed by two lenses consisting of a medium whose refractive index continuously varies in conformity with the distance from the optic axis comprises, for example, a first lens disposed on the object side, the first lens having a refractive index distribution in which the refractive index thereof increases away from the optic axis, the shape of the first lens being a shape in which the thickness thereof is greatest on the optic axis and decreases away from the optic axis, and a second lens disposed on the image side, the second lens having a refractive index distribution in which the refractive index thereof decreases away from the optic axis, the shape of the second lens being a shape in which the thickness thereof is smallest on the optic axis and increases away from the optic axis.

REFERENCES:
patent: 4639094 (1987-01-01), Aono

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