Collimator optical system for effecting elliptical-to-circular c

Details Collimator optical system for effecting elliptical-to-circular c Collimator optical system for effecting elliptical-to-circular c

1987-09-15

1989-03-07

Corbin, John K.

350420, 350433, G02B 1308, G02B 300

Patent

active

048100692

ABSTRACT:
A collimator optical system for effecting elliptical-to-circular cross section is disclosed which comprises two lenses in a slab form whose refractive index distribution in one plane is such that the refractive index decreases gradually from the center outward in the direction of their thickness. The two lenses are spaced on the optical axis in such a way that the direction of refractive index distribution in one lens crossing the direction of refractive index distribution in the other lens at right angles.

REFERENCES:
patent: 3667832 (1972-06-01), Kitano et al.
patent: 3894789 (1975-07-01), Kobayashi et al.
patent: 4639094 (1987-01-01), Aono

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