Alpha-kappa-alpha theta-alpha p__or a series of products for scanning devices and a beam of light that detects and removes products A

摘要

A beam of light (23) is moved through a product's classification detection area (14) with a specific area for dialogue. In scanning a band (14), in which to move their product and its beam.A detector (62) is set to receive the product emitted by reflected light and has a first field of view (76) greater than that. The region of the cross-section beam, in which the first detector is essentially sensitive to direct and delta_alpha___mu_reflection of light products and creation Use a first signal corresponding to these.The second detector (66) receives the reflected light and the second light field (80) is generally equal to the cross-sectional area of the beam. The second detector (66) is intrinsically sensitive only if the product directly reflects light and generates a second signal corresponding to these.Control circuit (72) forcing mechanism, removing impurities from abnormal products or series of products based on the first signal (62) and second detector (66) alone, or the difference between signals.