Identifying and classifying surface qualities and defects of object - using video camera to store reflected images arising from sequential exposure to light from distributed sources

摘要

The surface to be detected is illuminated from several sources (2,3) in different places. The sources illuminate the surface in sequence. The diffusely returned or reflected light at each point in the time sequence is recorded as space-time images by means of a video camera (7) with an image memory (9). The object is surrounded by an illuminating canopy whose surface light source arrangement is freely programmable w.r.t. angle and intensity stages. A further programmable light source (3) with a collimating optic (5) enables all points of a flat object surface to fulfil the reflection angle condition for the pupil of the camera lens. USE/ADVANTAGE - Characteristics and defects of surface such as edges, textures, nicks, colour spots, mat section, waves, cracks of objects such as metal pieces, ceramic discs, metal sheets, semiconductor chips, hybrid components, SMD's and their circuits, seals. Rapid detection and classification.