Reflectance sensor for integral illuminant-weighted CIE color matching filters
US7474402B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 23, 2006 |
| Grant date | Jan 6, 2009 |
| Priority date | — |
| Expiry date | Apr 15, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J2003/467
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A tristimulus colorimeter for measuring reflective or transmissive materials is provided. The colorimeter measures a sample under a calibrated light source, receives inputs to detectors, and determines CIE tristimulus values of the same sample as they would occur under a reference light source. The colorimeter includes a calibrated light source and a single silicon chip that includes three or more detectors. Each detector is permanently coated by a different mix of dyes or other colorants that form a wavelength-selective filter. A single silicon chip embodies all the detectors and electronics, with each detector coated over by deposited filter layers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.