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1. 发明授权

US06359717B2 Optical scanning apparatus and scanning image forming lens 失效
标题翻译：光学扫描装置和扫描图像形成透镜
公开(公告)号：US06359717B2
公开(公告)日：2002-03-19
申请号：US09874793
申请日：2001-06-06
申请人： Seizo Suzuki , Magane Aoki , Kobji Sakai
发明人： Seizo Suzuki , Magane Aoki , Kobji Sakai
IPC分类号： G02B2608
CPC分类号： G02B26/125 , Y10S359/90
摘要： An optical scanning apparatus includes a light source for outputting light, a first lens system arranged to receive the light output from the light source and to transmit a light flux therefrom, an optical deflector arranged to receive the light flux from the first lens system and having a deflecting reflective plane to deflect the light flux from a surface therefrom and a second lens system arranged to receive the light flux deflected from the optical deflector and to condense the deflected luminous flux into an optical beam spot on a surface to be scanned so as to form images having image heights, the luminous flux condensed by the second lens system into the optical beam spot including an optical beam waist. The second lens system has a scanning and image forming element including at least one surface including a plurality of portions each having a non-arc shape in a sub-scanning direction such that at least two of the non-arc shapes are different from each other and such that an effective writing width W and a width Fs of the sub-scanned image-surface curvature located within the effective writing width satisfies the condition Fs/W
摘要翻译：一种光学扫描装置，包括：用于输出光的光源;第一透镜系统，布置成接收从光源输出的光并从其透射光束;光学偏转器，布置成接收来自第一透镜系统的光束，并具有偏转反射平面，用于偏转来自其表面的光通量;以及第二透镜系统，布置成接收从光偏转器偏转的光束，并将偏转的光束冷凝成要扫描的表面上的光束点，以便形成具有图像高度的图像，将由第二透镜系统聚光的光束形成为包括光束腰部的光束点。第二透镜系统具有扫描和图像形成元件，该扫描和图像形成元件包括至少一个表面，其包括在副扫描方向上具有非弧形的多个部分，使得至少两个非弧形形状彼此不同并且使得位于有效写入宽度内的有效写入宽度W和副扫描图像表面曲率的宽度Fs满足条件Fs / W <0.005。或者，第二透镜系统包括扫描和图像形成元件，其包括至少一个表面，该至少一个表面包括在副扫描方向上具有非弧形的多个部分，使得至少一个透镜表面是亚非圆弧亚非圆弧形的副扫描横截面中的表面和形状是非弧形，并且非圆弧形状根据副扫描横截面在主扫描方向上的位置而变化。

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