发明名称 |
Optical scanning device, image reading device provided with this, image forming device, and photographing device |
摘要 |
An image reading device comprising a rotary polygon mirror (6) for scanning a light flux from a light source (1), an imaging optical system (4) for forming in a reflection plane of the mirror (6) a linear image larger than the width in a main scanning direction of the one reflection plane, and a curved-face mirror (7), wherein the light source (1) , the imaging optical system (4), the rotary polygon mirror (6) and the curved-face mirror (7) are disposed in different positions in a sub-scanning direction, a light flux from the imaging optical system (4) shines obliquely onto the polygon mirror (6), and a light flux reflected off the mirror (6) beams obliquely onto the curved-face mirror (7). Since one curved-face mirror can beam a light flux reflected from the rotary polygon mirror onto a surface to be scanned and the rotary polygon mirror having a small inscribed radius and many reflection planes can be used, satisfactory optical performance and high-speed feature can be realized.
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申请公布号 |
US2004100672(A1) |
申请公布日期 |
2004.05.27 |
申请号 |
US20030472777 |
申请日期 |
2003.09.24 |
申请人 |
YAMAMOTO YOSHIHARU;YOSHIKAWA MOTONOBU;MATSUKI DAIZABURO;YAMAMOTO HAJIME;YOSHIKAWA MASANORI;OKUDA AKINOBU |
发明人 |
YAMAMOTO YOSHIHARU;YOSHIKAWA MOTONOBU;MATSUKI DAIZABURO;YAMAMOTO HAJIME;YOSHIKAWA MASANORI;OKUDA AKINOBU |
分类号 |
B41J2/47;G02B26/12;(IPC1-7):G02B26/08 |
主分类号 |
B41J2/47 |
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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