The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 29, 2000
Filed:
Aug. 14, 1997
Other;
Abstract
The invention relates to a method and apparatus for color matching of slightly colored objects which are transparent, diffusing an absorbent, by acuminating a small error of the objects with a first bunch of optical fibers. A second bunch of optical fibers is used to pick up the light back scattered from the area of the objects. The second fibers are located inside of the illuminating fibers. The light is measured at 3 wavelengths that correspond to blue, green and red colors and the pigmentation of the object is calculated as a difference between the red and blue spectrum components. Presentation of the brightness is calculated to be proportional to the green spectrum component. The pigmentation and brightness is then compared with the same perimeters of a standard shape pallet. The invention is particularly suitable for color matching the teeth in the mouth with dental prosthesis and dental restorative materials.