Anamorphic single lens

Details Anamorphic single lens Anamorphic single lens

1988-04-06

1990-04-10

Sugarman, Scott J.

350 61, 350 68, G02B 1308, G02B 2610

Patent

active

049154842

ABSTRACT:
An optical system for a laser beam printer uses, as a first image forming system, an anamorphic lens whose first surface facing a light source has a refraction power rotation-symmetrical with respect to the optical axis, and whose second surface is a toric surface having refraction powers different in horizontal and vertical directions. A coupling optical system for an optical disk information recording apparatus comprises an anamorphic single lens whose first surface is a toric surface correcting aberration only in a first direction in which radiation angle of a light beam emitted from a light source is larger than that in a second direction perpendicular to the first direction, and whose second surface is a toric surface correctly aberration only in the second direction.

REFERENCES:
patent: 4756584 (1988-07-01), Takanashi

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