Patent Number: 7,785,103

Title: Apparatus and method for measuring optical characteristics of teeth

Abstract: A method for outputting a closest match of a plurality of electronically stored shade guide values of a dental shade guide system is disclosed. A protective tip including a hole for couples light from a probe to a measurement spot on a dental object. The probe is in proximity to a reference standard and a calibration/normalization measurement of the reference standard is taken. Light returned from the dental object is measured with an optical sensor. A first frequency proportional to an intensity of a first wavelength/spectral band of light is determined, a second frequency proportional to an intensity of a second wavelength/spectral band is determined, and a third frequency proportional to an intensity of a third wavelength/spectral band of light is determined. A closest match is selected of a plurality of electronically stored shade guide values of one or more dental shade guide systems.

Inventors: Jung; Wayne D. (Morton Grove, IL), Jung; Russell W. (Morton Grove, IL), Loudermilk; Alan R. (Chicago, IL)

Assignee: JJL Technologies LLC

International Classification: A61C 1/00 (20060101); G01J 3/51 (20060101)

Expiration Date: 8/31/12018