Coordinate input device
    11.
    发明授权
    Coordinate input device 失效
    协调输入设备

    公开(公告)号:US3654389A

    公开(公告)日:1972-04-04

    申请号:US3654389D

    申请日:1968-07-12

    Applicant: IBM

    Inventor: POLE ROBERT V

    CPC classification number: G06F3/0386

    Abstract: A coordinate input device having two beams of pulsed laser light passing through a photochromic glass plate. The successive intersection points of pulses from the two beams scan the plate along a raster to successively mark each coordinate position on the plate. A light pen directs ultraviolet light onto the surface of the plate to generate a scattering center at any chosen coordinate on the plate. Laser light is scattered by such centers and is detected by the light pen. The greater amount of light scattered at an intersection point is used to generate an indication of the chosen coordinate. Another embodiment uses roughened glass, rather than photochromic glass, to cause scattering.

    Abstract translation: 具有通过光致变色玻璃板的两束脉冲激光的坐标输入装置。 来自两个光束的相继的脉冲相交点沿光栅扫描板,以连续地标记板上的每个坐标位置。 光笔将紫外光引导到板的表面上,以在板上的任何所选坐标处产生散射中心。 激光由这样的中心散射,并由光笔检测。 使用在交点处散射的更大量的光来产生所选坐标的指示。 另一个实施例使用粗糙玻璃而不是光致变色玻璃来引起散射。

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