Patent ID: 8670632

Claim:
An imaging system for reducing an effect of an undesired infrared light source using a desired infrared light source and an image capture device that detects emissions of both the undesired infrared light source and the desired infrared light source, comprising: a desired infrared light source that is positioned on a first side of a light permeable surface, the desired infrared light source selectively emitting desired infrared light that is transmitted through the light permeable surface onto a physical object positioned on or adjacent to an opposite side of the light permeable surface and is reflected back through the light permeable surface by the physical object, the desired infrared light source being controllable to be activated and deactivated at defined intervals to enable the detection and removal of undesired infrared light from all infrared light detected during the defined intervals; an image capture device that is positioned on the same first side of the light permeable surface as the desired infrared light source, the image capture device sensing the desired infrared light after it is reflected by the physical object, and also sensing undesired infrared light that passes through the light permeable surface from undesired sources of infrared light located on the opposite side of the light permeable surface; a screening device that is positioned on the same first side of the light permeable surface as the desired infrared light source and between the desired infrared light source and the image capture device to prevent the desired infrared light from entering the image capture device prior to being reflected back through the light permeable surface by the physical object; and a processor in communication with the desired infrared light source and the image capture device.