Method of determining the capacity of a cosmetic to diffuse and/or absorb light
US7061617B2 · kind B2 · utility
9Cited by
4References
57Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 10, 2003 |
| Grant date | Jun 13, 2006 |
| Priority date | — |
| Expiry date | Mar 9, 2024 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/441
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Methods and apparatus for determining the optical characteristics of cosmetic substances are disclosed. The method includes illuminating the surface of the substance with an incident light beam so as to form a back-scatter spot, obtaining an image of the back-scatter spot, and analyzing the variations in brightness of the image at a number of points so as to determine the optical characteristic in question.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.