This paper presents one approach to designing color filters for a colorimeter that uses multiple internal illuminants and multiple filtered-detectors. The internal illuminants and optical detectors are fixed items in the colorimeter. The color filters are designed using simplex search,
Vora's measure of goodness, and linear minimum mean square estimation. Radiance and reflectance data sets were used to test the performance of the designed color filters. Design experiments for solely photometric, solely radiometric, and combination colorimeters gave average Δ
Paul Chen, H. Joel Trussell, "Color Filter Design For Multiple Illuminants and Detectors" in Proc. IS&T 3rd Color and Imaging Conf., 1995, pp 67 - 70, https://doi.org/10.2352/CIC.1995.3.1.art00018