Method and apparatus for determining color, in particular of a dental prosthesis
US4836674A · kind A · utility
134Cited by
6References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 13, 1987 |
| Grant date | Jun 6, 1989 |
| Priority date | — |
| Expiry date | Aug 13, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2201/0806
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention can be used to determine the color to be given to a dental prosthesis, for example, on the basis of color measurements performed on adjacent teeth in the mouth of the patient. An optical fiber instrument picks up light reflected from a tooth and transmits it to the inlet of a spectrocolorimeter which associated with a microprocessor in order to determine the diffuse spectral reflectance of the tooth and to calculate the tristimulus values of its apparent color under various different types of illumination. The invention is particularly suitable for determining the color of dental prostheses.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.