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US 8,570,498 B2Granted
Filters, illuminants, and customized spectral profiles for reducing perceptible changes in appearance
AssigneeBoard of Regents, The University of Texas System
InventorCarl W. Dirk
Life of this patent
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Abstract
Customized spectral profiles, and filters and illuminants having a customized spectral profile, optimized to reduce light in one or more wavelength regions for which one or more pigments are relatively more susceptible to perceptible changes in appearance.
Claims18
A method of generating a customized spectral profile, the method comprising:
- determining for one or more pigments one or more wavelength regions for which the one or more pigments are relatively more susceptible to perceptible changes in color than for one or more other less-susceptible wavelength regions;
- optimizing a spectral profile to generate a customized spectral profile such that an illuminant or filter configured to have the customized spectral profile will reduce light in the one or more more-susceptible wavelength regions.
A method of generating a customized spectral profile, the method comprising:
- determining for an image a plurality of wavelength regions in which one or more pigments of the image are relatively more susceptible to damage causing perceptible changes in appearance;
- optimizing a custom spectral profile for a filter or illuminant to reduce light in each of the wavelength regions.
An apparatus comprising:
- an illuminant configured to emit light if the illuminant is energized;
- a plurality of filter layers coupled to the illuminant;
- where the apparatus is configured such that, if the illuminant is energized and emits light, the filter layers will:
- (a) block a portion of the light having wavelengths in one or more selected wavelength regions in which one or more pigments are relatively more susceptible to damage causing perceptible changes in appearance, and
- (b) transmit a portion of the light such that the transmitted light has a color rendering index of at least 85 for the one or more pigments relative to the illuminant without filter layers.
2 more elements
Dependencies are inferred from the claim text.