PHOTOELECTRIC ENCODER
    2.
    发明公开
    PHOTOELECTRIC ENCODER 审中-公开
    FOTOELEKTRISCHER CODIERER

    公开(公告)号:EP1729097A1

    公开(公告)日:2006-12-06

    申请号:EP05721111.2

    申请日:2005-03-18

    IPC分类号: G01D5/36 G02B13/22

    CPC分类号: G01D5/38 G01D5/34715 G01D5/36

    摘要: A photoelectric encoder has a telecentric optical system in which a first lens and an aperture located at a focal position of the first lens are interposed between a main scale and a photoreceptor. At least a second lens is interposed between the aperture and the photoreceptor with a focus of the second lens on the aperture, thereby constituting a bilateral telecentric optical system. This makes it possible to improve the signal detection efficiency and increase the assembly tolerance.

    摘要翻译: 光电编码器具有远心光学系统,其中第一透镜和位于第一透镜的焦点位置处的孔介于主刻度尺和感光体之间。 至少第二透镜被插入孔和感光体之间,第二透镜的焦点在孔上,从而构成双向远心光学系统。 这使得可以提高信号检测效率并增加组装公差。