Scanning optical system

Details Scanning optical system Scanning optical system

1989-07-28

1990-09-11

Arnold, Bruce Y.

G02B 2610, G02B 302

Patent

active

049556827

ABSTRACT:
A scanning optical system for use in a light scanner including a light deflector for deflecting a light beam to scan a surface is disposed between the light deflector and the scanned surface. The scanning optical system focuses the defelcted light beam onto the scanned surface and keeps the scanned surface and a light beam deflecting point in substantially conjugate relationship in an auxiliary scanning direction for thereby correcting facet errors of the light deflector. The scanning optical system has a saddle-shaped convex toroidal surface having a radius of curvature in a cross section along the auxiliary scanning direction, the radius of curvature being progressively greater in a direction away from the optical axis of the scanning optical system. The scanning optical system satisfies the following condition:

REFERENCES:
patent: 4496209 (1985-01-01), Itoh et al.
patent: 4756585 (1990-03-01), Kaneko et al.

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