Patent ID: 7474402

Claim:
A solid-state color-measuring device, comprising: at least one light source comprising a colorimeter illuminant for illuminating a sample; a plurality of light detectors; and a plurality of filters that are permanently deposited onto the solid-state color-measuring device, the filters being included in a plurality of layers such that light reflected off the sample passes through the layers and causes the plurality light detectors to cause the solid-state color-measuring device to produce an output having a plurality of colorimeter-illuminant-weighted spectral responses each approximating a reference-illuminant-weighted CIE-like color-matching function, wherein a set of combinations of layers is determined, each of the combinations of layers being determined so that the output has the colorimeter-illuminant-weighted spectral responses that are linearly combined to approximate a set of reference-illuminant-weighted CIE-like color-matching functions; and further wherein one of the set of combinations is selected from a set of combinations having a best solution and meeting predetermined performance criteria, the combination that is selected being permanently deposited onto the solid-state color-measuring device.