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Photometric standards and calibrating procedures
Research on absolute reflection standards at
Working colour standards for industry made
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anomaloscope average beige blue calculated calibration cavity radiator chart Color Rule colorimetric Colormaster colour difference formula colour discrimination colour matching lamps colour temperature colour vision colour vision tests compared comparison correlation Cream curve diagram dominant wavelength effective colour difference energy distribution equivalent luminance error evaluation filter fluorescent brightening fluorescent lamps green grey Grum illumination industry Judd laboratory Lakowski light source Lovibond glasses luminance factor MacAdam unit match-point mean measurements mesopic metamerism method minutes of arc National Physical Laboratory natural daylight neutral north skylight observers obtained optical optical brighteners phase of daylight photometric photopic pigment pink plastic plotted ratio reference reflectance samples shown in Figure shows specification spectral radiance spectrophotometer spectrum standard surface Table tiles Tintometer tolerance tristimulus values tubes tungsten ultraviolet Uniform Chromaticity Scale Unilever visual Wyszecki xenon xenon arc lamp yellow