Patent ID: 8313033
Filing Date: 2012-11-20
Classification: G06K

Abstract:
1. A workstation for electro-optically reading targets associated with objects, comprising: a housing having a light-transmissive window; a scan module mounted in the housing, the scan module including a reading light source for directing reading light through the window at a target for return therefrom during reading, and a reading light detector for detecting return reading light returned from the target along a reading path through the window over a reading field of view during reading and for generating an electrical signal indicative of the detected return reading light; an object sensing system for sensing an object associated with the target, and for generating a trigger signal to initiate the reading, the object sensing system including an object light source for directing object sensing light through the window at the object for return therefrom, and an object light sensor for detecting return object sensing light returned from the object along an object detection path through the window over an object detection field of view, a portion of the object sensing light incident on the window being reflected therefrom into the object detection field of view as a virtual hot spot that degrades object detection by the object light sensor; a controller responsive to the trigger signal and operative for processing the electrical signal into data corresponding to the target; and an optical element in the object detection path for optically modifying the object detection field of view to prevent the virtual hot spot from being detected by the object light sensor.