Optical inspection system for large parts and for multiple measurements

摘要

An optical-electronic measurement system wherein only the images of workpiece edges from which measurements are to be taken are coupled to identifiable locations on the photocathode of a processor-controlled scanner by a plurality of flexible fiber optic bundles whose object ends are placed about an inspection field so that each such edge is within the field of view of a respective bundle. Pairs of such identifiable locations are correlated to the measurements to be taken. A workpiece of known size is placed in the inspection field and the scanner photocathode is electronically scanned to determine the positions of the edge images relative to scan origins. The processor adjusts functions to relate the edge positions correctly to the known dimensions. The same measurements of workpieces of unknown dimensions are then taken by the calibrated system using the adjusted functions.