Polygon mirror, a scanning apparatus and an image forming appara

Details Polygon mirror, a scanning apparatus and an image forming appara Polygon mirror, a scanning apparatus and an image forming appara

1995-01-26

1995-12-19

Reinhart, Mark J.

Incremental printing of symbolic information

Light or beam marking apparatus or processes

Scan of light

B41J 242

Patent

active

054772613

ABSTRACT:
An image forming apparatus comprising a laser optical system for optical scanning on a photosensitive drum. The laser optical system comprises a polygon mirror having mirror surfaces with an inclination of an angle .theta.. The polygon mirror is rotated with each mirror surface inclined by the angle .theta. to a line normal to the scanning plane, while the incident light beams to the polygon mirror are inclined by an angle 2.theta. to the scanning plane, so as to compensate the inclination of the mirror surfaces of the polygon mirror. In this way, the polygon mirror can be easily manufactured by plastic molding without damaging the mirror surfaces.

REFERENCES:
patent: 4692629 (1987-09-01), Nakamura
patent: 5130840 (1992-07-01), Iima et al.

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