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1. 发明授权

US6154303A Laser scanning system 失效
标题翻译：激光扫描系统
公开(公告)号：US6154303A
公开(公告)日：2000-11-28
申请号：US450057
申请日：1999-11-29
申请人： Cheon Seog Rim , Jong Su Yi
发明人： Cheon Seog Rim , Jong Su Yi
IPC分类号： H04N1/113 , G02B13/18 , G02B26/10 , G02B26/12 , G02B26/08
CPC分类号： G02B26/125
摘要： A laser scanning system formed by injection molding first and second scanning lenses by using a plastic substance for correcting field curvature at a scanned surface, minimizing focus shift and eccentricity due to a temperature variation and degradation of optical performance due to a tilt error, and providing a relatively simplified lens shape while facilitating mold processing and injection molding includes a light source for emitting a modulated beam from a laser diode, a collimator lens for forming the beam from the light source into parallel beams, a slit for partially passing the parallel beams from the collimator lens, a cylinder lens for converging the parallel beams passed through the slit in a sub scan direction, a polygonal rotating mirror rotated at high speed for deflecting the incident parallel beams at a prescribed angle, and a scanning lens system for receiving the deflected beams from the polygonal rotating mirror to form an image on the scanned surface by converging the incident beams in the scan and sub scan directions, in which a first scanning lens and a second scanning lens of a plastic substance constitute the scanning lens system. A first surface of the first scanning lens is formed with a spherical surface, a second surface of the first scanning lens and third and fourth surfaces of the second scanning lens are formed with an a spherical toric surface having a rotating axis in the scan direction. The shape around the optical axis of the scanning lens is concave, convex and concave from the first surface in the scan direction and concave, convex, concave and convex in the sub scan direction.
摘要翻译：一种激光扫描系统，其通过使用用于校正扫描表面处的场曲率的塑料物质注射成型第一和第二扫描透镜而形成，使得由于温度变化引起的焦点偏移和偏心以及由于倾斜误差导致的光学性能的劣化，相对简化的透镜形状同时促进模具加工和注塑成型包括用于从激光二极管发射调制光束的光源，用于将光束从光源形成平行光束的准直透镜，用于部分地将平行光束从准直透镜，用于使沿着副扫描方向通过狭缝的平行光束会聚的柱面透镜，以高速旋转的多边形旋转镜，用于使入射的平行光束以规定角度偏转;以及扫描透镜系统，用于接收偏转的来自多边形旋转镜的光束，通过会聚t在扫描表面上形成图像他在扫描和副扫描方向上入射光束，其中塑料物质的第一扫描透镜和第二扫描透镜构成扫描透镜系统。第一扫描透镜的第一表面形成有球面，第一扫描透镜的第二表面和第二扫描透镜的第三表面和第四表面在扫描方向上形成具有旋转轴的球形复曲面。扫描透镜的光轴周围的形状在扫描方向上从第一表面是凹的，凸的和凹的，在副扫描方向上是凹的，凸的，凹的和凸的。

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