Optical scanning device and image forming apparatus
AssigneeFuji Xerox Co., Ltd.
InventorYoshiyuki Suzuki
Life of this patent
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Abstract
An optical scanning device includes a light source having plural light emitting portions, a deflection unit that deflects and scans plural light beams emitted from the light source in a main scanning direction, and plural optical element groups disposed between the light source and the deflection unit and including an optical element having a negative refractive power along a sub-scanning direction intersecting the main scanning direction. An interval in the sub-scanning direction of the plural light beams is adjusted by tilting the optical element having the negative refractive power on an axis along the main scanning direction.
Claims9
An optical scanning device comprising:
- a light source having a plurality of light emitting portions;
- a deflection unit that deflects and scans a plurality of light beams emitted from the light source in a main scanning direction;
- and
- a plurality of optical element groups disposed between the light source and the deflection unit and including an optical element having a negative refractive power along a sub-scanning direction intersecting the main scanning direction,
- wherein an interval in the sub-scanning direction of the plurality of light beams is adjusted by tilting the optical element having the negative refractive power about an axis along the main scanning direction.
An optical scanning device comprising:
- a first light source having a plurality of light emitting portions;
- a second light source having a plurality of light emitting portions;
- a deflection unit that deflects and scans a plurality of first light beams and a plurality of second light beams respectively emitted from the first and second light sources in a main scanning direction;
- and
- a common optical element group disposed between the first and second light sources and the deflection unit to simultaneously adjust intervals in a sub-scanning direction of the plurality of first light beams and the plurality of second light beams,
- wherein the optical element group includes at least a cylindrical concave lens and a cylindrical convex lens, and
- wherein the intervals in the sub-scanning direction of the plurality of first light beams and the plurality of second light beams are adjusted by moving the cylindrical concave lens along an optical axis direction and tilting the cylindrical concave lens about a center axis along the main scanning direction.
Dependencies are inferred from the claim text.