发明名称 |
Optical scanning apparatus |
摘要 |
An optical scanning apparatus includes: a light source for emitting a laser light ray; a cylinder lens for converting the laser light ray into a first convergent light ray that converges only in a sub-scanning direction and remains unchanged in a main scanning direction; a deflection unit for deflecting the first convergent light ray from the cylinder lens; a focusing unit for converting the deflected light ray into a second convergent light ray that converges in the main scanning direction, and for focusing the second convergent light ray on a scanned surface as a light spot; an aperture unit, arranged between the light source and the deflection unit, for blocking an outer peripheral portion of the laser light ray and for restricting a width of the laser light ray in the sub-scanning direction to a first width of an aperture of the aperture unit; and an adjusting unit for adjusting the first width of the aperture of the aperture unit so as to eliminate a deviation of the diameter of the light spot on the scanned surface from a design value.
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申请公布号 |
US5570224(A) |
申请公布日期 |
1996.10.29 |
申请号 |
US19940223849 |
申请日期 |
1994.04.06 |
申请人 |
RICOH COMPANY, LTD. |
发明人 |
ENDO, OSAMU;HAYASHI, YOSHINORI;ICHIMIYA, KOJI;OHSAWA, TAKAYUKI |
分类号 |
G02B26/10;G02B26/12;(IPC1-7):G02B26/08 |
主分类号 |
G02B26/10 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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