Plurality of longitudinally scanned fluorescent light-conductive fibers differentially masked for beam position detection

摘要: For detecting the position of a beam radiation, e.g. light from mirror galvanometer or radioactive radiation source on float in liquid level detector, for movable element, fiber glass other material is used which fluoresces under and photocell provided at end fluorescent transmitted along fiber. In one arrangement rotating mask arranged around with apertures so that different parts length are exposed thus fed out serial digital form by output. another construction plurality fibers separate masks various photocells give parallel representation position.