Post-objective type optical deflector

Details Post-objective type optical deflector Post-objective type optical deflector

1985-12-30

1988-07-19

Corbin, John K.

G02B 2610

Patent

active

047580593

ABSTRACT:
A post-objective type optical deflector, in which luminous fluxes are condensed by a convergent lens and thereafter deflected by a polygonal mirror, among apparatuses for scanning a laser beam, involves a problem in the deterioration of the curvature of field and the f.theta. characteristic. The deterioration of the curvature of field and the f.theta. characteristic may be corrected by forming a reflecting surface of a polygonal mirror into a convex surface or a convex cylindrical surface and adequately selecting the relationship between the distance A from the rotational center to the center of the reflecting surface, the radius of curvature R of the reflecting surface, the distance Lo from the deflection point of the polygonal mirror to the scanning surface, and the scanning width Yo.

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How To Select Acousto-Optic Modulators, Barry Grossman, Harris Corporation, Government Communications System Division.

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