Patent ID: 9444981
Filing Date: 2016-09-13
CPC Classification: H04N

Claim Text:
1. A surface measurement module for 3-D image acquisition of a subject-under-inspection, the module comprising: (a) a casing to house a pattern shifting device from which an output comprising a multi-frequency pattern comprising a plurality of pixels representing at least a first and second superimposed sinusoid of light from a light source, is directed at a polarizing beam splitter, (b) each said pixel of said plurality of pixels comprised of said first sinusoid having a first frequency distinct from a second frequency of said second sinusoid; (c) the polarized output of said splitter directed through a lens assembly comprising at least one lens element; (d) a reflector to direct said polarized output exiting said lens assembly, to illuminate a surface of the subject-under-inspection; (e) a scattered light illumination off said surface is directed back to said reflector and then through said lens assembly for capture by an image sensor; and (f) said casing also housing said polarizing beam splitter, said lens assembly, and said image sensor.