Patent ID: 8768025
Filing Date: 2014-07-01
Classification: A61B,G01J

Abstract:
1. An apparatus for obtaining a color mapping for a dental object, comprising: an illumination apparatus energizable to direct illumination of at least a first, a second, and a third wavelength band, one wavelength band at a time, toward the dental object; a monochrome image sensor array having broad spectral response over at least the first, second, and third wavelength bands, that is disposed with respect to an optical system and that is actuable to capture an image of the dental object at each illumination wavelength band to form a set of images of the dental object; a reference target that is disposed in the object field of the optical system and substantially in focus with respect to the image sensor array; and a control logic processor operatively connected with the illumination apparatus and monochrome image sensor array and responsive to stored instructions to energize the illumination apparatus to sequentially provide the at least first, second, and third wavelength bands and further responsive to stored instructions to capture and store an image at each wavelength band, to calculate image data values for each pixel, and to generate and store a color mapping according to a sample set of spectral reflectance data and according to measured image values from the sample set.