公开(公告)号：US20120019608A1

公开(公告)日：2012-01-26

申请号：US13187095

申请日：2011-07-20

申请人： Noriyuki CHINO ,  Katsuhiko TAKANO ,  Shoji KANEMURA ,  Junji YASUDA ,  Kota KIYAMA

发明人： Noriyuki CHINO ,  Katsuhiko TAKANO ,  Shoji KANEMURA ,  Junji YASUDA ,  Kota KIYAMA

IPC分类号： B41J2/435

CPC分类号： B41J2/473 ,  G02B26/127 ,  G06K15/1219

摘要： An optical scanning apparatus capable of properly correcting a main scanning scale factor. Upstream and downstream laser-light detection sensors of the optical scanning apparatus each generate a signal when first or second light beam passes through each of slits formed in the sensors. Based on signals, a scanning time required for each light beam to scan between the sensors is measured. A correction coefficient is decided by a correction value calculation unit based on a difference between wavelengths of the first and second light beams, a scanning time difference is calculated by a comparison unit based on the correction coefficient and scanning times of the light beams, and the downstream laser-light detection sensor is rotated by a sensor rotation drive unit to make the scanning time difference zero, whereby the slits are made parallel to each other.

摘要翻译： 一种能够适当地校正主扫描比例因子的光学扫描装置。 当第一或第二光束通过形成在传感器中的每个狭缝时，光学扫描装置的上游和下游激光检测传感器各自产生信号。 基于信号，测量每个光束在传感器之间扫描所需的扫描时间。 校正系数由校正值计算单元基于第一和第二光束的波长之间的差异来确定，通过比较单元基于校正系数和光束的扫描时间来计算扫描时间差，并且 下游激光检测传感器被传感器旋转驱动单元旋转以使扫描时间差为零，从而使狭缝彼此平行。