||the 1931 2° functions from 360 to 830 nm, at 1nm intervals|
||the 1931 2° functions from 380 to 780 nm, at 5nm intervals|
Each is a colorSpec object organized as a matrix with 3 variables.
||the x-bar responsivity function|
||the y-bar responsivity function|
||the z-bar responsivity function|
Günther Wyszecki and W.S. Stiles. Color Science : Concepts and Methods, Quantitative Data and Formulae. Second Edition. Wiley-Interscience. 1982. Table I(3.3.1). pp. 723-735.
ASTM E 308 - 01. Standard Practice for Computing the Colors of Objects by Using the CIE System. Table 1