SCANNING OPTICAL SYSTEM

PROBLEM TO BE SOLVED: To provide a scanning optical system in which the shape of bows is made coincide with each other for a plurality of optical beams which have different incident angles with respect to a polygon mirror even when the bow arises due to an error of assembly. SOLUTION: Laser lights L...

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Bibliographic Details
Main Author TAKAKUBO YUTAKA
Format Patent
LanguageEnglish
Published 03.07.2003
Edition7
Subjects
BASIC ELECTRIC ELEMENTS
CORRECTION OF TYPOGRAPHICAL ERRORS
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME
LINING MACHINES
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICS
PERFORMING OPERATIONS
PHYSICS
PICTORIAL COMMUNICATION, e.g. TELEVISION
PRINTING
SELECTIVE PRINTING MECHANISMS
SEMICONDUCTOR DEVICES
STAMPS
TRANSPORTING
TYPEWRITERS
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Summary:PROBLEM TO BE SOLVED: To provide a scanning optical system in which the shape of bows is made coincide with each other for a plurality of optical beams which have different incident angles with respect to a polygon mirror even when the bow arises due to an error of assembly. SOLUTION: Laser lights L1, L2, L3 and L4 which are emitted from semiconductor lasers 11, 11... are simultaneously deflected by a polygon mirror 20 via collimating lenses 12, 12... and a cylindrical lens 13, converged on photoreceptor drums 61 through 64 via a scanning lens 30 and correction lenses 51 through 54, and form beam spots. The incident angles in subscanning direction with respect to the polygon mirror are different for each light beam, however the shapes of the correction lenses in the main scanning direction provided for each light beam are set to be substantially the same. Thus, the shapes of the arising bows substantially coincide and the occurrence of out of color registration is prevented. COPYRIGHT: (C)2003,JPO
Bibliography:Application Number: JP20010388364