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1. 发明公开

EP2400260A1 Optical displacement sensor 审中-公开
标题翻译： Optischer Weggeber
公开(公告)号：EP2400260A1
公开(公告)日：2011-12-28
申请号：EP11162086.0
申请日：2003-02-13
申请人： OPDI Technologies A/S
发明人： Hanson, Steen , Rose, Bjarke , Jakobsen, Michael Linde
IPC分类号： G01B11/16 , G01B9/02 , G01P3/36 , G01B11/00
CPC分类号： G01B11/002 , G01P3/36
摘要： The present invention relates to a compact and inexpensive optical displacement sensor system for determination of displacement of an object, which does not require accurate control of the distance to the object. The object is illuminated by a coherent light source for formation of speckle variations, and a repetitive optical structure is utilized to divert light from the illuminated object onto at least three optical detector elements. The speckle variations move with movement of the object, and speckle variation movement is determined without a need for imaging the object onto the repetitive optical structure. Since the speckle variations are not imaged onto the repetitive optical structure, the distance and possible distance changes between the object and the repetitive optical structure substantially do not affect system performance.
摘要翻译：本发明涉及一种用于确定物体的位移的紧凑且廉价的光学位移传感器系统，其不需要精确控制到物体的距离。该物体由相干光源照射以形成斑点变化，并且使用重复的光学结构将来自被照射物体的光转移到至少三个光学检测器元件上。斑点变化伴随物体的移动而移动，并且确定斑点变化运动，而不需要将物体成像到重复的光学结构上。由于斑点变化不成像在重复的光学结构上，物体与重复光学结构之间的距离和可能的距离变化基本上不影响系统性能。

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