Gradient index single lens

Details Gradient index single lens Gradient index single lens

1987-07-06

1988-09-13

Corbin, John K.

G02B 314, G02B 1500

Patent

active

047705060

ABSTRACT:
This specification discloses a single lens having an index gradient in a direction perpendicular to the optic axis thereof, and the surface of the single lens on the light beam incidence side when the single lens is used at a reduced magnification is formed into a surface concave relative to the object side, whereby the working distance is sufficiently long and aberration are well corrected.

REFERENCES:
patent: 3486808 (1969-12-01), Hamblen
patent: 3626194 (1971-12-01), Hirano et al.
patent: 4457590 (1984-07-01), Moore

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