Luminous efficiencies of 2゜and 10゜ fields for brightness perception obtained from Japanese subjects :

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  • IKEDA,Mitsuo
    Department of Information Processing, Tokyo Institute of Technology Graduate School,

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Luminous efficiencies for brightness are tabulated at every 10 nm step that were obtained for 2゜field from 18 Japanese subjects and for 10゜field from 9 Japanese subjects. The data were provided by various Japanese laboratories and analyzed in the Research Committee on the luminous efficiency functions in the Illuminating Engineering Institute of Japan. The efficiencies were all determined by the direct comparison method against a reference at some photopic retinal illuminance level. The mean luminous efficiency function of the 18 subjects for the 2゜ field is fairly close to that presented in a technical report of the CIE Technical Committee TC-1.4,Vision.

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