Light beam scanning apparatus and controlling method for image forming apparatus
AssigneeCanon Kabushiki Kaisha
InventorYuichi MAKINO
Life of this patent
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Abstract
A light beam scanning apparatus that causes a beam generated by a light source to scan corresponding to recording direction along a photosensitive medium by rotating polygonal mirrors, wherein to form a latent image on the photosensitive medium, comprising a first polygonal mirror that rotates at a first velocity, a second polygonal mirror that rotates at a second velocity different from the first velocity, and a controller that carries out image formation by selectively using the first polygonal mirror and the second polygonal mirror.
Claims15
A light beam scanning apparatus that causes a beam generated by a light source to scan corresponding to recording direction along a photosensitive medium by rotating polygonal mirrors, wherein to form a latent image on the photosensitive medium, comprising:
- a first polygonal mirror that rotates at a first velocity;
- a second polygonal mirror that rotates at a second velocity different from the first velocity;
- and
- a controller that carries out image formation by selectively using the first polygonal mirror and the second polygonal mirror.
A controlling method for an image forming apparatus having a light beam scanning apparatus that causes a beam generated by a light source to scan corresponding to recording direction along a photosensitive medium by rotating polygonal mirrors, wherein to form a latent image on the photosensitive medium,
- wherein the light beam scanning apparatus comprises a first polygonal mirror that rotates at a first velocity, and a second polygonal mirror that rotates at a second velocity different from the first velocity, and
- the controlling method comprises:
- a first image forming step of forming an image using the first polygonal mirror;
- and
- a second image forming step of forming an image using the second polygonal mirror.
Dependencies are inferred from the claim text.