The Measurement of Colour

absorption amount of light atlas beam C.I.E. system C₁ calculated Chapter chromaticity chart chromaticity co-ordinates colorimeter colorimetry colour discrimination colour matches colour measurement colour mixture colour quality colour specification colour temperature colour vision cones defined desaturated described diagram distribution coefficients distribution curves dominant wavelength energy distribution equal equal-energy field filter fluorescent lamp fovea give given green and blue Guild illumination illustrated in Fig instrument layer light flux located luminance factor luminous efficiency matt surface medium Munsell observer optical photocell photometer photometry pigment prism problem produced radiations receptors reference stimuli refractive refractive index represented reproduction retina Rochon prism sample saturation sensitivity curves shown in Fig signals spectral composition spectral sensitivity spectrophotometer spectrum locus standard subtractive colour surface T-units Tintometer tion Trans transmission curve trichromatic tristimulus values V₁ visible spectrum visual W. D. WRIGHT yellow