Beam shaping for optical scanners
    8.
    发明授权
    Beam shaping for optical scanners 失效
    光学扫描仪的光束成形

    公开(公告)号:US5742038A

    公开(公告)日:1998-04-21

    申请号:US268982

    申请日:1994-06-30

    摘要: An optical scanner such as a bar code scanner includes a laser diode to create the scanning laser beam. Laser diodes are characteristically astigmatic, and when passed through a rotationally symmetric lens the beam typically forms a waist both in the x (scanning) direction and in the y (perpendicular) direction. The width of the beam envelope in the x direction is adjusted by means of a conventional lens. The width of the beam envelope in the y direction is adjusted by the use of a non-planar mirror, preferably a cylindrical mirror, as the rotating or oscillating element.

    摘要翻译: 诸如条形码扫描器的光学扫描仪包括用于产生扫描激光束的激光二极管。 激光二极管的特征是散光,当通过旋转对称透镜时,光束通常在x(扫描)方向和y(垂直)方向上形成腰部。 通过传统的透镜来调整光束包络线在x方向上的宽度。 通过使用非平面镜(优选圆柱形镜)作为旋转或振荡元件来调节光束包络线在y方向上的宽度。