Three-Dimensional Imaging Using a Multi-Phase Projector

THREE-DIMENSIONAL IMAGING USING A MULTI-PHASE PROJECTOR 5 An apparatus for inspecting a surface of an object has a first light source operative to illuminate the object without producing a patterned image onto the object. A second light source projects a patterned image produced from a first polarized light from the second light source onto the object, wherein the first polarized light is polarized in a first polarization direction. A third light 10 source projects the patterned image produced from a second polarized light from the third light source onto the object, wherein the second polarized light is polarized in a second polarization direction different from the first polarization direction. An imaging device views the surface of the object when the object is illuminated separately by the first, second and third light sources 15 respectively for determining a profile of the surface of the object. (FIG. 1) 20