Projection device with refractive index distribution type lens

Details Projection device with refractive index distribution type lens Projection device with refractive index distribution type lens

1986-06-26

1987-09-29

Corbin, John K.

Photocopying

Contact printing

Light boxes

350 9618, 350 9631, 355 1, G02B 300, G02B 514

Patent

active

046965521

ABSTRACT:
A projection device has an illuminating system for illuminating an object, and an index distribution type lens for projecting the image of the object. The lens has a refractive index distribution substantially proportional to the square of the distance from the optic axis in a cross-section perpendicular to the optic axis and a refractive index distribution monotonously varying in the direction of the optic axis.

REFERENCES:
patent: 3658407 (1972-04-01), Kitano et al.
patent: 3666347 (1972-05-01), Kitano et al.
patent: 3909110 (1975-09-01), Marcuse
patent: 4373780 (1983-02-01), Lama
patent: 4435064 (1984-03-01), Tsukada et al.
patent: 4462662 (1984-07-01), Lama
patent: 4527886 (1985-07-01), Inamori et al.

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