公开(公告)号：US20050012973A1

公开(公告)日：2005-01-20

申请号：US10498240

申请日：2003-05-07

申请人： Takeshi Sowa ,  Nozumo Inoue ,  Yoichi Mitsui

发明人： Takeshi Sowa ,  Nozumo Inoue ,  Yoichi Mitsui

IPC分类号： G02B26/12 ,  G02B27/00 ,  G02B26/08

CPC分类号： G02B27/0006 ,  G02B26/129

摘要： The present invention relates to an optical scanning device in which a light beam is incident twice on a deflective reflecting facet and its object is to reduce curvature in scanning line trail or make the curvature substantially zero, or correct scanning line displacement due to the curvature in scanning line trail. Two stationary plane mirrors (13, 14) are disposed to face a deflective reflecting facet (11) which can be rotated about its rotational axis (12) such that a light beam (a1) being incident on and reflected from the deflective reflecting facet (11) is reflected by the two stationary plane mirrors (13, 14) sequentially. The reflected light beam (a3) is incident on and reflected by the deflective reflecting facet (11) again. Assuming that a plane being parallel to the rotational axis (12) and including the light beam (a0) which is first incident on the deflective reflecting facet is an incident plane, the central ray of an emergent light beam (a4) when the emergent light beam (a4) after the second reflection by the deflective reflecting facet (11) is on the incident plane and a straight line as the central ray of a light beam being projected on the incident plane when the deflective reflecting facet (11) is revolved by the maximum rotational angle are set substantially parallel to each other.

摘要翻译： 本发明涉及一种光学扫描装置，其中光束在偏转反射面上入射两次，其目的是减少扫描线迹线中的曲率或使曲率基本上为零，或由于曲率的正确扫描线位移 扫描线路。 两个固定平面镜（13,14）被设置成面对能够围绕其旋转轴线（12）旋转的偏转反射小面（11），使得光束（a1）入射到偏转反射面（和 11）由两个固定平面镜（13,14）依次反射。 反射光束（a3）再次入射到偏转反射面（11）并反射。 假设平行于旋转轴线（12）并且包括首先入射在偏转反射小面上的光束（a0）的平面是入射面，则出射光（a4）的中心射线 在偏转反射面（11）进行第二次反射之后的光束（a4）在入射面上，当偏转反射面（11）旋转时，作为光束的中心射线投射在入射面上的直线 最大旋转角度被设定为基本上彼此平行。