Scanning optical system using parallel plate to eliminate ghost

Details Scanning optical system using parallel plate to eliminate ghost Scanning optical system using parallel plate to eliminate ghost

1996-06-03

1999-01-19

Dzierzynski, Paul M.

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359196, 359216, 359217, G02B 2608

Patent

active

058619780

ABSTRACT:
A scanning optical system includes a polygonal mirror, enclosed in a housing, which deflects light. The housing is provided with a transparent plane-parallel plate, parallel to a reflecting surface of the polygonal mirror, through which a laser light source emits a laser beam into the housing. An image forming optical system, provided between the polygonal mirror and an objective surface to be scanned, has a power at least in a main scanning direction. The laser beam is made incident on the polygonal mirror in a direction inclined toward a sub-scanning direction, with respect to a direction perpendicular to the reflecting surface of the polygonal mirror.

REFERENCES:
patent: 4796963 (1989-01-01), Yoshimura
patent: 4823002 (1989-04-01), Saito
patent: 4863227 (1989-09-01), Takanashi
patent: 4930869 (1990-06-01), Miyagawa et al.
patent: 5043569 (1991-08-01), Iima et al.
patent: 5047625 (1991-09-01), Iima et al.
patent: 5436728 (1995-07-01), Watanabe
patent: 5506719 (1996-04-01), Murakami et al.

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