| 摘要 |
An optical device senses the motion or lack of motion of a moving surface that is perpendicular to the axis of the device. The sensor obtains images of the movable surface, and then analyses those images to determine the nature of the motion. The sensor then produces output signals indicating the state of motion of the movable surface. The optical device does not require contact with the surface of motion or a separate lighting source or a target applied to the movable surface. The optical sensor includes a lens assembly, a light source, an image processing unit, and a motion evaluation unit to accomplish the sensing of the movement of the surface.
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