Key points are not available for this paper at this time.
Abstract The second part of the N.P.L.'s colour-matching investigation was devoted to determining average colour-matching properties in a large (10° diameter) bipartite matching field, and the final corrected results are here presented in tabular form, together with a specification of the conditions of measurement, and ancillary data on repeatability. The tabulated results comprise (a) mean colour-matching functions, referred to reference primaries at wave-numbers 15 500, 19 000 and 22 500 cm-1, for spectral stimuli in the range 12 000 to 25 500 cm-1, given at intervals of 250 cm-1 between 16 000 and 22 000 cm-1 and at intervals of 500 cm-1 outside these limits, (b) the standard deviations and correlation coefficients of the colour-matching functions at wave-numbers between 14 000 and 25 500 cm-1, (c) mean colour-matching functions corrected for rod intrusion in the range 12 000 to 17 000 cm-1, (d) the corresponding mean unit coordinates in a W.D.W. system, and their standard deviations, (e) the mean relative luminosity factors of the reference primaries and their standard deviations determined by both direct-comparison and flicker heterochromatic matching, (f) the mean relative luminosity function V λ in the range 12 000 to 15 000 cm-1 determined by direct comparison with 14 250 cm-1. The main colour-matching results are based on 49 subjects, but the results for spectral stimuli of wave-number less than 14 000 cm-1 rest on fewer subjects. The extent to which the results show an increase with age in the yellow pigmentation of the eye is discussed.
Stiles et al. (Thu,) studied this question.