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1. 发明申请

US20050122704A1 Method for supporting reflector in optical scanner, optical scanner and image formation apparatus 审中-公开
标题翻译：在光学扫描仪，光学扫描仪和图像形成装置中支撑反射器的方法
公开(公告)号：US20050122704A1
公开(公告)日：2005-06-09
申请号：US10973340
申请日：2004-10-27
申请人： Masanori Yoshikawa , Hideo Hirose , Masaaki Nakano , Ikuko Katou , Keisuke Fujimoto
发明人： Masanori Yoshikawa , Hideo Hirose , Masaaki Nakano , Ikuko Katou , Keisuke Fujimoto
IPC分类号： G03B15/02
CPC分类号： G03B15/02
摘要： A reflector 10 is formed so as to have a long side along a scanning direction of a ray bundle. The reflector 10 includes a thin-plate-shaped reflector body having one plane to be a reflection plane 20 and upper and lower ribs 21a and 21b each extending from the reflector body in a back side. The reflector plane 20 is formed of a curved plane having positive power at least in the scanning direction, i.e., a so called free-form plane. The reflector 10 is supported by protrusions 31, 32 and 33 at three points, i.e., first, second and third support points S1, S2 and S3 located in the vicinities of one end portion of the reflector, the other end of thereof, and a center portion thereof, respectively. A distance L1 between an imaginary straight line V1 joining the first and second support points S1 and S2 and the third support point S3 is larger than a sag L2 of the reflector 20. The center of gravity G of the reflector is located inside of an imaginary triangle V3 joining the first, second and third support points S1, S2 and S3.
摘要翻译：反射器10形成为沿着光束的扫描方向具有长边。反射器10包括具有作为反射面20的一个平面的薄板状的反射体，在背面侧从反射体主体延伸的上下肋21a，21b。反射器平面20由至少在扫描方向上具有正功率的曲面形成，即所谓的自由平面。反射器10由位于反射器的一个端部附近的第一，第二和第三支撑点S1，S2和S3的三个点处的突起31,32和33支撑，其另一端，及其中心部分。连接第一支撑点S1和第二支撑点S2的虚拟直线V 1与第三支撑点S 3之间的距离L 1大于反射器20的下垂L 2。反射器的重心G位于连接第一，第二和第三支撑点S 1，S 2和S 3的假想三角形V 3的内部。

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