Patent ID: 8587772
Filing Date: 2013-11-19
Classification: G01B

Abstract:
1. A chromatic point sensor (CPS) system configured to compensate for potential errors, including errors due to workpiece material effects, the CPS system comprising: a first confocal optical path including a longitudinally dispersive element, the first confocal optical path configured to focus different wavelengths at different distances proximate to a workpiece; a second optical path configured to focus different wavelengths at substantially the same distance proximate to the workpiece; a light source connected to input a first input spectral profile of wavelengths to the first confocal optical path; a light source connected to input a second input spectral profile of wavelengths to the second optical path; a first confocal optical path disabling element configured to prevent the first input spectral profile from being transmitted to a workpiece through the first confocal optical path; a second optical path disabling element configured to prevent the second input spectral profile from being transmitted to a workpiece through the second optical path; and a CPS electronics comprising a CPS wavelength detector comprising a plurality of pixels distributed along a measurement axis of the CPS wavelength detector, the plurality of pixels receiving respective wavelengths and providing output spectral profile data, wherein, the CPS system is configured such that: