APPARATUS AND METHOD FOR THE OPTICAL DETECTION OF MULTIPLE ITEMS ON A PLATFORM

摘要

An apparatus for detecting the presence of multiple items includes a platfor m upon which one or more items may be placed and a detector positioned with respect to the platform to receive an image of a profile of the one or more items on the platform. The detector is configured and arranged to generate a signal corresponding to the profile. T he signal indicates whether multiple items are on the platform. The detector may be, for example, a moving point detector, a linear detector , or a two-dimensional array detector. This apparatus can be used in conjunction with an inventory control device, such as an automated library check-out device, to prevent the unauthorized removal of inventory items.