D. B. Judd, Color in Business, Science and Industry (John Wiley & Sons, Inc., New York, 1952).
R. H. Park and E. I. Stearns, J. Opt. Soc. Am. 34, 112 (1944).
G. W. Haupt and F. L. Douglas, J. Opt. Soc. Am. 37, 698 (1947).
Forrest, Kreidl, and Pett, J. Opt. Soc. Am. 38, 554 (1948).
D. L. MacAdam, J. Opt. Soc. Am. 39, 22 (1949).
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A correction may be introduced for loss in transmittance by surface reflection or in a substrate, and the effect of sample thickness can be accounted for, by suitable modifications of Eq. (1). 70
Billmeyer, Beasley, and Sheldon, "A color order system predicting constant hue" (paper in preparation).
F. W. Billmeyer, Jr., "Use of a digital readout unit in converting spectrophotometric data to color coordinates," J. Opt. Soc. Am. (to be published).
All color differences referred to in this paper were calculated by the Adams chromatic value formula, normalized to the NBS unit by the factor adopted in ASTM Designation D 1482-57T. See also E. Q. Adams, J. Opt. Soc. Am. 32, 168 (1942); D. Nickerson and K. F. Stultz, J. Opt. Soc. Am. 34, 550 (1944).
The samples referred to make up the full chroma transparent section of the Faber Birren Color Library in "Lucite" acrylic resin; see "Color styling in acrylic resins," F. W. Billmeyer, Jr., and I. K. de Blieu (paper in preparation).
While the tolerance limits in this experiment were selected to be comparable to the probable error of color measurement,12 they can readily be made to correspond more nearly to steps of equal visual perception.