Patent ID: 7656540
Filing Date: 2010-02-02
Classification: G01B

Abstract:
1. An optical measurement device for determining at least two parameters of a measurement location of a surface of a workpiece positioned in a known coordinate system by a workpiece support, comprising: a first laser light source providing a first measurement beam at a first wavelength; a second laser light source providing a second measurement beam at a second wavelength; a beam steering system positioning the first and second measurement beams to be collocated together as a defined spot at the same time on the surface of the workpiece and substantially normally incident on the workpiece; a first imaging system, detecting the Z-height of the workpiece based upon the incoming position of the spot of the first wavelength light of the first measurement beam; and an optical receiving system, detecting the angle of the surface of the workpiece based upon the incoming position of the spot of the second wavelength light of the second measurement beam, wherein the first imaging system and the optical receiving system simultaneously detect the first and second measurement beams, respectively.