Patent ID: 7388665

Claim:
A multicolour chromaticity sensor enabling determination of intensity and chromaticity of light, the sensor comprising: a) two or more photodetectors, each having a detection zone responsive to a range of wavelengths in the electromagnetic spectrum, wherein each photodetector generates a sensor parameter representative of intensity and chromaticity of light incident upon its detection zone; b) two or more filters, one filter optically coupled to a first of the two or more photodetectors thereby forming a first filter-photodetector and a second filter optically coupled to a second of the two or more photodetectors thereby forming a second filter-photodetector; and c) the first filter-photodetector configured to be sensitive to a first predetermined region of the electromagnetic spectrum, and the second filter-photodetector configured to be sensitive to a second predetermined region of the electromagnetic spectrum, said first filter-photodetector and second filter-photodetector forming a complementary pair, wherein the first predetermined region is complementary to the second predetermined region; wherein a measuring means interfaced with each of the two or more photodetectors independently receives a first sensor parameter from for one of the two or more photodetectors and a second sensor parameter for a second of the two or more photodetectors, thereby providing a means to determine the intensity and chromaticity of the light.