Filter design for colorimetric measurement
US7916301B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 14, 2008 |
| Grant date | Mar 29, 2011 |
| Priority date | — |
| Expiry date | Jul 11, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J3/513
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A color detector includes a light source configured to generate light with a spectrum of wavelengths; a plurality of filters in optical communication with the light source, wherein each filter is configured to pass a bandwidth of wavelengths around a different peak wavelength; and a plurality of photodetectors, each configured to receive light passed through a respective filter of the plurality of filters. The bandwidth of each filter is configured to Correspond to a bandwidth of a curve from a set of standard color matching functions. A method for improving color detection accuracy in a color detector includes matching a bandwidth passed by each of a plurality of color filters with a bandwidth and peak wavelength of a Commission Internationale de l'Eclairage (CIE) color matching function; and separately detecting an amount of light passed by each the filter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.