Patent ID: 9459373
Filing Date: 2016-10-04
CPC Classification: G01J,G01P,G01V,G07F

Claim Text:
1. A method of detecting an object passing through a volume of interest in a first direction using an optical sensing system, said method comprising: activating an emitter to generate a light beam that substantially spans said volume of interest and has an intensity and a diameter; expanding the diameter of the light beam by directing the light beam through a lens assembly to create an expanded light beam; collimating the expanded light beam by directing the expanded light beam through the lens assembly to create a collimated light beam; focusing the collimated light beam at a mosaic detector having a plurality of light detecting elements along a length and a width, each detecting element able to independently detect changes to the intensity of the light beam; detecting shadows falling on each of the light detecting elements caused by the object moving through said volume of interest; programming a processor with motion detection algorithms to determine whether the detected shadows meet a certain pattern as movement of the object is detected.