Light beam scanning optical system

Details Light beam scanning optical system Light beam scanning optical system

1990-08-01

1993-06-15

Arnold, Bruce Y.

Optical: systems and elements

Deflection using a moving element

359208, 359217, G02B 2608

Patent

active

052204499

ABSTRACT:
A toroidal lens and two pieces of spherical mirrors cooperatively function to have a uniform velocity of a light beam over a range from the center to both edges of a scanning area when the light beam deflected at an equiangular velocity by a rotative deflection device is directed toward a light collecting surface. The toroidal lens further maintains a conjugate relation of each reflective surface of the rotative deflection device and the light collecting surface by which an error in the inclination of image on each reflective surface is rectified, and at the same time, the direction of radiation of the light beam is regulated so as to make the curvature of the field smaller.

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