High accuracy optoelectronic displacement measuring device

摘要

The device relates to devices of the "displacement sensor" type using light 112 partially masked by a moving mask 202, whose displacement corresponds to a variation of the difference in the illumination of two photo-receivers 1, 2. The precision of the measurements is independent of the lateral or rotational mechanical plays of the moving rod in contact with the part to be checked, by using a moving mask element 200 which is mechanically independent of the moving rod 105 on whose inner end the said element is continuously in print, axial and tangential contact. The application is the device is the precise dimensional, static or dynamic, inspection of assemblies for the servocontrol of moving bodies in robotics, etc. IMAGE