发明授权
US3740153A Optical straight line detector 失效
光直线检测器

Optical straight line detector
摘要:
A simple means of detecting a straight line or edge using noncoherent optical techniques. An object is imaged onto a rotating film loop by a lens. The film loop has a number of parallel, equally spaced bars. When a straight line is detected which is parallel to the bars on the rotating film, its presence is indicated by a large signal being emitted by a photodetector.
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