Brytech Inc.

John C B Davey

David A Kahn

A hand-held colorimetric device () suitable for use by blind or color-blind individuals to determine the color of a surface-under-test (SUT), for example of a fabric, has an aperture () which, in use, is covered by the SUT () whose color is to be determined. Six LEDs (A,B,B,A andB) arranged in pairs (A/B,A/B,a/B) emitting red/orange, green, and blue light illuminate the SUT and diffuse reflections therefrom containing red/orange, green, and blue spectrum sample values are used to determine the luminous reflectivity and chromaticity values for the color of the SUT. The measured values are compared with colorimetric values of reference surfaces to determine the color of the SUT. The colorimetric device may output the name of the color aurally.

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Nepean, Canada

John C B Davey