公开(公告)号：US06194708B1

公开(公告)日：2001-02-27

申请号：US09328424

申请日：1999-06-09

申请人： Ching Shun Wang ,  Cheng-Liang Hsieh ,  Ming-Hsiang Chu ,  Yu Shian Liu ,  Mi-Jung Wang ,  Nelson Lai ,  Shu Fang Lu ,  You-Yan Yang

发明人： Ching Shun Wang ,  Cheng-Liang Hsieh ,  Ming-Hsiang Chu ,  Yu Shian Liu ,  Mi-Jung Wang ,  Nelson Lai ,  Shu Fang Lu ,  You-Yan Yang

IPC分类号： G01D5347

CPC分类号： G01D5/3473 ,  G01D5/34707 ,  G01D5/36

摘要： An encode device, comprises a light source, an encode wheel and a light detector. A hollow dent is formed on the center part of the incident plane of the encode wheel. The inner circumference of the dent is provided with a ring-shaped lens such that the light impinging on the inner circumference of the dent is focused by the ring-shaped lens. The rim of the encode wheel is provided with a plurality of cylindrical lenses which are perpendicular to the ring-shaped lens such that the light leaving the encode wheel can be further focused. Therefore, the working beam projected toward the chip of the light detector has less interference.

摘要翻译： 一种编码装置，包括光源，编码轮和光检测器。 在编码轮的入射面的中心部分形成有中空的凹痕。 凹陷的内圆周设置有环形透镜，使得入射凹陷内周的光被环形透镜聚焦。 编码轮的边缘设置有多个垂直于环形透镜的柱面透镜，使得离开编码轮的光可以进一步聚焦。 因此，向光检测器的芯片投影的工作光束具有较小的干扰。