公开(公告)号：US6134040A

公开(公告)日：2000-10-17

申请号：US188939

申请日：1998-11-10

申请人： Cheon Seoq Rim ,  Jong Su Yi

发明人： Cheon Seoq 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 includes a light source for scanning a modulated beam from a laser diode, a collimator lens for forming the beam from the light source into parallel beam, a slit for partially passing the required parallel beam passed through the collimator lens for scanning, a cylinder lens for converging the parallel beam passed through the slit in a sub scan direction, a polygonal rotating mirror rotated at high speed for deflecting the incident beams parallel in a scan direction and converged in the sub scan direction while going through the cylinder lens in the state of having a prescribed view of angle, and a scanning lens system for allowing the beams incident after being deflected by 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 two first scanning lens and second scanning lens of a plastic substance constitute the scanning lens system, a first surface of the first scanning lens is formed of a coaxially aspherical surface, a second surface of the first scanning lens and third and fourth surfaces of the second scanning lens are formed of an aspherical toric surface having a rotating axis in the scan direction, and the shape around the optical axis of the scanning lens is to be concave, convex, convex and concave from the first surface in the scan direction and to be concave, convex, concave and convex in the sub-scan direction.

摘要翻译： 激光扫描系统包括用于扫描来自激光二极管的调制光束的光源，用于将光束从光源形成为平行光束的准直透镜，用于部分地通过穿过准直透镜进行扫描的所需平行光束的狭缝， 用于使沿着副扫描方向通过狭缝的平行光束会聚的圆柱透镜;高速旋转的多边形旋转镜，用于使入射光束沿扫描方向平行偏转，并在副扫描方向上会聚，同时穿过圆柱透镜 具有规定的角度视角的状态，以及扫描透镜系统，用于允许在多边形旋转镜偏转之后入射的光束在扫描表面上通过在入射光束和副扫描方向上会聚而形成图像， 塑料物质的两个第一扫描透镜和第二扫描透镜构成扫描透镜系统，第一扫描的第一表面 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扫描透镜的第三表面由扫描方向上具有旋转轴的非球面复曲面形成，并且光学周围的形状 扫描透镜的轴线在扫描方向上从第一表面凹入，凸，凹和凹，并且在副扫描方向上是凹的，凸的，凹的和凸的。