Verfahren und Vorrichtung zum optischen Pruefen der Mantelflaeche zylindrischer Koerper
The method involves using a collimated light beam with a circular cross-section, which is transferred into a convergent light beam with an annular cross-section. The light beam is directed onto the cylindrical component mantle surface at an acute angle to its longitudinal axis, for uniform illumination of a cylindrical section of the component surface. The radially dispersed light received from the illuminated area of the mantle surface of the component is detected and evaluated. the beam may be divided into two partial beams, each of which illuminates a half-cylinder surface of the cylindrical section. The light beam from a collimated source (1) may be converted into a convergent beam directed by a semi-reflective mirror (6) onto the mantle surface of the component. The dispersed light from the cylindrical component may be reflected by a rotationally symmetrical reflector (10) and fed through the semi-reflective mirror onto a detector, e.g. a camera (13). USE - For testing shaft, pist on rod, axle, etc. ADVANTAGE - Robust testing method providing rapid testing rate.
DE 1997-19713973 A: 19970404