Device for contact-free measuring of the distance of a surface of an object from a reference plane

摘要

A device for contact-free measuring of the distance of an object surface from a reference plane by deflecting a beam of light in a path and detecting a beam reflected along a given line of sight by a detector characterized by providing means for measuring the interval of time for travel of the deflected light beam between at least two specific directions of the beam and between at least one of the two directions and a direction at which the photo detector responds and utilizes the time intervals to determine the speed of deflection and determine the distance of the surface from the reference plane.