Patent ID: 7446862

Claim:
A door sensor system ( 90 ) for detecting a target object ( 56 ) in and/or near a door, comprising: a door opening ( 96 ), at least one movable door element ( 76 - 1 , 76 - 2 , 76 - 3 , 76 - 4 ), at least one light scanner device ( 10 ), each said light scanner device includes moving mirrors, each said light scanner device mounted at a given mounting angle with respect to said door element, said moving mirrors of said light scanner device deflecting light generated by said light scanner device, each said mirror includes a plurality of mirror facets and each said facet oriented at a tilt angle with respect to an axis ( 36 ) of said moving mirrors, said tilt angles of said plurality of mirror facets defining a plurality of tilted detection planes (scanning planes) generated by said moving mirrors, each detection plane, scanning plane, includes a sweep sector a scan angle defined by said plurality of detection planes, scanning planes, said scan angle includes a scanning width ( 60 ) and a scanning area ( 59 ), and, said light scanner device optically measures the distance to a target at regular intervals 15 - i ) within the sweep sector of each scanning plane ( 15 ) covering the scanning area ( 59 ).