Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Hitoshi Fujino0
Date of Patent
October 31, 2006
0Patent Application Number
110555130
Date Filed
February 11, 2005
0Patent Primary Examiner
Patent abstract
An effective scanning range of laser light in a scanning direction is configured so that a center position of the effective scanning range is displaced by a distance β along the scanning direction from an optical axis f an fθ lens. The incidence angle α between a center of luminous flux of the laser light on a deflection surface of polygon mirror and the optical axis of the fθ lens can beset to satisfy a relational expression (4π/N)−(W/D)≦|α|<(4π/N)−{(W−β)/D}.
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