Method for designing a colorimeter having integral CIE color-matching filters
First Claim
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1. A method for determining a design of a color-measuring device, comprising:
- determining a plurality of light detectors; and
determining a plurality of filters having a plurality of colorants that are permanently deposited onto the color-measuring device;
wherein the colorants permit light to pass through the filters to cause the light detectors to produce an output approximating a plurality of spectral responses of at least one CIE-like color-matching function.
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Abstract
A method for determining the optimal colorant thicknesses for integral CIE color-matching filters is provided. According to a computational study, a four band filter of the present invention provides a best approximation to the CIE XYZ color-matching functions with the least cost.
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Citations
23 Claims
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1. A method for determining a design of a color-measuring device, comprising:
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determining a plurality of light detectors; and
determining a plurality of filters having a plurality of colorants that are permanently deposited onto the color-measuring device;
wherein the colorants permit light to pass through the filters to cause the light detectors to produce an output approximating a plurality of spectral responses of at least one CIE-like color-matching function. - View Dependent Claims (2, 3, 4, 5)
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6. A method for designing a colorimeter having integral CIE-like color-matching filters, comprising:
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determining a set of channels from a plurality of channels;
determining a set of filters, each filter being permanently deposited on each of the channels, each filter being an absorptive filter, each filter having at least one layer, at least one channel having at least one filter with a double layer so that a linear combination of the set of channels matches a set of CIE-like target color-matching functions within a tolerance, each channel integrating at least one detector and at least one filter onto a single semiconductor substrate;
determining a colorant for each layer on each channel from a set of colorants; and
determining a thickness of each layer on each channel. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method for designing a colorimeter having integral CIE color-matching filters, comprising:
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receiving a plurality of colorants and a plurality of target CIE-like color-matching functions;
determining a plurality of channel colorant recipes and a plurality of additive mixtures of channels to match the target CIE-like functions within a tolerance for a minimum number of channels and colorants per channel, each channel being one of a plurality of channels in a colorimeter, each channel having a filter covering each detector; and
providing a best solution from the channel colorant recipes and the additive mixtures of channels, the best solution including a set of channels, a thickness for each colorant in each channel, and a matrix of linear coefficients. - View Dependent Claims (18, 19, 20, 21, 22)
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23. A computer-readable medium having stored thereon a plurality of instructions, the plurality of instructions including instructions which, when executed by a processor, cause the processor to perform the steps of a method for designing a colorimeter having integral CIE color-matching filters, comprising:
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determining a set of colorants for each layer of each channel of a colorimeter, the colorimeter having a plurality of channels, each channel having at least one filter covering each detector, a linear combination of the channels matching a set of CIE-like target color-matching functions to within a tolerance;
generating a set of potential solutions, the set of potential solutions including the set of colorants for each colorant layer of each channel, a particular number of colorants for each layer, and a thickness of each colorant layer for each channel;
selecting a solution from the set of potential solutions by minimizing the number of channels needed to match the CIE-like target color-matching functions within the tolerance, by minimizing the number of colorant layers per channel without increasing the number of channels needed to match the CIE-like target color-matching functions within the tolerance, and by minimizing deviations in performance under the influence of colorant layer thickness variations; and
providing the solution, the solution including a particular number of channels, a particular number of colorant layers per channel, the set of colorants for each layer of each channel, and the thickness of each layer needed to match the CIE-like target color-matching functions within the tolerance.
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Specification