Photoelectric device measuring distance or angle between objects - has LED slidable and pivotable within clamped ring for adjustment to focus of collimator lens

摘要

In the photoelectric measuring device, light from a movable diode (4) is collimated (7) and propagated as a parallel beam through a scanning plate (5) and a scale carrier (1) to a group of photodetectors (6). The diode is adjusted so that its crystal (41) is located at a focus of the collimator, by a ring (10) whose convex surface (101) is in contact with the inside (13) of a tubular holder (9). After each adjustment, the ring is clamped by the tightening of a radial screw. ADVANTAGE - Source of radiation can be adjusted esp. precisely without any external device, and secured with simple clamp which facilitates replacement.