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US 6,958,838 B2Granted
Laser scanning unit
AssigneeSamsung Electronics Co., Ltd.
InventorHyung-soo Kim
Life of this patent
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Abstract
A laser scanning unit is provided comprising a polygon mirror that deflects light beams respectively emitted by a plurality of light sources, an image focusing system that respectively focuses an image corresponding to each light beam deflected from the polygon mirror onto a surface of a plurality of photoconductive drums, and an incident optical system disposed between the light sources and the polygon mirror. The incident optical system comprises an infinite optical system along a main scanning direction and a finite optical system along a sub-scanning direction.
Claims8
A laser scanning unit comprising:
- at least one light source emitting at least one light beam;
- a polygon mirror that deflects the at least one light beam emitted by the at least one light source;
- an image focusing system that focuses an image corresponding to each light beam deflected from the polygon mirror onto the surface of a plurality of photoconductive drums;
- and
- an incident optical system disposed between the at least one light source and the polygon mirror, the incident optical system comprising a first cylinder lens and a second cylinder lens, wherein the first cylinder lens comprises an infinite optical system along a main scanning direction and a finite optical system along a sub-scanning direction and wherein the second cylinder lens comprises a finite optical system along a main scanning direction and an infinite optical system along a sub-scanning direction.
2 more elements
Dependencies are inferred from the claim text.