公开(公告)号：US20180293470A1

公开(公告)日：2018-10-11

申请号：US16005785

申请日：2018-06-12

申请人： Sharp Kabushiki Kaisha

发明人： Nobuhiro SHIRAI

IPC分类号： G06K15/14 ,  H04N1/06 ,  G03G15/043 ,  H04N1/12 ,  H04N1/113 ,  H04N1/053 ,  B41J2/47 ,  G02B26/12 ,  G02B13/00 ,  G03G15/04

CPC分类号： G06K15/14 ,  B41J2/471 ,  G02B13/0005 ,  G02B26/122 ,  G02B26/123 ,  G02B26/124 ,  G02B26/125 ,  G02B26/127 ,  G03G15/04 ,  G03G15/043 ,  H04N1/053 ,  H04N1/0607 ,  H04N1/1135 ,  H04N1/12 ,  H04N2201/0082 ,  H04N2201/04713 ,  H04N2201/04732 ,  H04N2201/04744

摘要： A light scanning device includes: a first semiconductor laser 44a that emits a light beam L1; a polygonal mirror 42 that deflects the light beam L1; a reflective mirror 64a that reflects the light beam L1 deflected by the polygonal mirror 42 and causes the light beam L1 to enter a photosensitive drum 13; and a BD sensor 72 that detects the light beam L1 deflected by the polygonal mirror 42. The light scanning device scans the photosensitive drum 13 with the light beam L1 and set scanning timing of the photosensitive drum 13 using the light beam L1 based on detection timing of the light beam L1 using the BD sensor 72. The BD sensor 72 is arranged in the position farther from the polygonal mirror 42 than the last reflective mirror 64a that reflects the light beam L1 immediately before entering the photosensitive drum 13 and arranged inside a scanning angle range α of the light beam L1 corresponding to an effective scan area of the photosensitive drum 13.

公开(公告)号：US20150002593A1

公开(公告)日：2015-01-01

申请号：US14267223

申请日：2014-05-01

申请人： Sharp Kabushiki Kaisha

发明人： Nobuhiro SHIRAI ,  Takaharu MOTOYAMA

IPC分类号： B41J2/385

CPC分类号： G03G15/04072

摘要： A light scanning device of the invention includes a scan deflection range of each of the light fluxes deflected by the deflecting part in a scan period of the scan object with the respective light fluxes is divided into a first deflection range where a reflection angle of each of the light fluxes with respect to the deflecting part is small and a second deflection range where the reflection angle is large. A polarization direction of each of the light fluxes is set such that a reflectivity of the reflective mirror when each of the light fluxes deflected in the second deflection range is reflected becomes larger than a reflectivity of the reflective mirror when each of the light fluxes deflected in the first deflection range is reflected.

摘要翻译： 本发明的光扫描装置包括在扫描对象与各光束的扫描周期中由偏转部分偏转的每个光束的扫描偏转范围被划分为第一偏转范围，其中每个的反射角 相对于偏转部的光束小，反射角大的第二偏转范围。 每个光束的偏振方向被设定为使得当在第二偏转范围中偏转的每个光束被反射时反射镜的反射率变得大于当每个光束偏转的反射镜的反射率 第一偏转范围被反映出来。