Color measurement instrument capable of obtaining simultaneous polarized and nonpolarized data
US6597454B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 12, 2000 |
| Grant date | Jul 22, 2003 |
| Priority date | — |
| Expiry date | May 12, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J3/0272
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A color measurement instrument capable of measuring both the nonpolarized spectral response and the polarized spectral response of a sample on a single reading. The instrument includes a source of polarized light to illuminate the sample, and a detector for measuring the light reflected by the sample. A rotatable filter wheel is located between the sample and the detector. Nonpolarizing bandpass filters and polarizing bandpass filters are mounted in the wheel in a circular configuration. A drive mechanism rotates the wheel to automatically sequentially align each of the nonpolarizing filters and the polarizing filters with the detector, enabling the instrument to sample both nonpolarized data and polarized data on a single reading.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.