Light scanning device, light scanning device production method, and color image forming apparatus
AssigneeRicoh Company, Ltd.
InventorMitsuo Suzuki
Life of this patent
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Abstract
A light scanning device includes a semiconductor laser which emits a laser beam in response to an image forming signal, an optical deflector which scans the laser beam emitted from the semiconductor laser in a main scanning direction, and a liquid crystal deflecting element which changes the scanning position of the laser beam emitted from the semiconductor laser while desynchronized with output of the image forming signal, thereby to correct the scanning position of the laser beam in a sub-scanning direction.
Claims18
A light scanning device comprising:
- a light source which emits a laser beam in response to an image forming signal;
- a deflection scanning unit which scans the laser beam emitted from the light source in a main scanning direction;
- and
- a scanning position correction unit which changes a scanning position of the laser beam emitted from the light source while desynchronized with output of the image forming signal, thereby to correct the scanning position of the laser beam in a sub-scanning direction.
A light scanning device comprising:
- a light source which emits a laser beam in response to an image forming signal;
- a deflection scanning unit which scans the laser beam emitted from the light source in a main scanning direction;
- and
- a scanning position correction unit which changes a scanning position of the laser beam emitted from the light source, thereby to correct the scanning position of the laser beam in a sub-scanning direction,
- wherein the image forming signal is output at timing previously set in consideration of image quality in a transient state of the scanning position change performed by the scanning position correction unit.
A method for producing a light scanning device comprising:
- a light source which emits a laser beam in response to an image forming signal;
- a deflection scanning unit which scans the laser beam emitted from the light source in a main scanning direction;
- and
- a scanning position correction unit which changes a scanning position of the laser beam emitted from the light source while desynchronized with output of the image forming signal, thereby to correct the scanning position of the laser beam in a sub-scanning direction,
- wherein a position of the light acceptance element is set by moving and adjusting the light acceptance element in the sub-scanning direction so that an output signal of a laser beam detector exists in a predetermined range according to the position of the light acceptance element.
A method for producing a light scanning device, comprising:
- a light source which emits a laser beam in response to an image forming signal;
- a deflection scanning unit which scans the laser beam emitted from the light source in a main scanning direction;
- and
- a scanning position correction unit which changes a scanning position of the laser beam emitted from the light source while desynchronized with output of the image forming signal, thereby to correct the scanning position of the laser beam in a sub-scanning direction, the image forming signal being output at timing previously set in consideration of image quality in a transient state of the scanning position change performed by the scanning position correction unit,
- wherein a position of the light acceptance element is set by moving and adjusting the light acceptance element in the sub-scanning direction such that an output signal of a laser beam detector exists in a predetermined range according to the position of the light acceptance element.
Dependencies are inferred from the claim text.