Rear-scattered article detecting method for opto-electronic device, involves producing signal pattern on pixel array corresponding to images of light spots, and determining information about sensing distance between device and article

摘要

The method involves striking light rays (18) generated by a light source (14) as a light spot on an article (26b, 26c) and detecting the rays reflected from the article according to a triangulation principle by a receiving arrangement. A ray imaging element is placed in the arrangement, where the element is an array (20) of imaging elements (22b-22d) connected upstream of a pixel array. A signal pattern is produced on the pixel array corresponding to images of the spots. Information about a sensing distance between an opto-electronic device (10) and the article is determined from the pattern.