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发明授权
US07271823B2 Optical scanner and image forming apparatus 有权
光学扫描仪和图像形成装置

Optical scanner and image forming apparatus
摘要：
An optical scanner has a deflector, a coupling lens, a cylindrical lens, a plate through which light to and from the deflector pass, and an optical system which condenses the light deflected on a surface to be scanned. Bundles of light beams incident on the deflector have an angle between the bundles in a rotating plane of the deflector, and expressions 0.6
摘要（中）：

光学扫描器具有偏转器，耦合透镜，柱面透镜，偏转器和偏光板通过的平板，以及将要扫描的表面上偏转的光聚光的光学系统。 入射在偏转器上的光束束在偏转器的旋转平面中在束之间具有角度，并且表达式0.6 <（θ1 max-α）/（θ2 +α）<1.4和0.6 < -α）/（θ2 +α）<1.4，其中θ1 max和θ1 min是偏转表面上的最大入射角和最小平均入射角，θ2是半视角，α是 板在旋转平面中相对于主扫描方向的倾斜角。

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