Stiles & Burch (1959) 10-deg colour matching functions

Data key

Wavenumber scale

Columns

  1. Wavenumber (cm-1)
  2. Wavelength (nm)
  3.  
  4.  
  5.  

 

Wavelength scale

Columns

  1. Wavenumber (cm-1)
  2.  
  3.  
  4.  

Notes

    Mean 10-deg colour matching functions of Stiles and Burch (1959).  Primaries at 15500 (645.16), 19000 (526.32) and 22500 (444.44) cm-1 (nm).

    CMFs versus wavenumber: from Table 1(5.5.4) of Wyszecki and Stiles (1982).

    CMFs versus wavelength: at shorter wavelengths from Table I(5.5.4); but, at longer wavelengths, corrected by Stockman and Sharpe (2000) from the original CMFs (Table 7 of Stiles & Burch, 1959) for rod intrusion (according to the corrections given in Table 8 of Stiles & Burch, 1959) and re-interpolated  at 5-nm intervals.   See Table 3 of Stockman and Sharpe (2000).

    The 10-deg CMFs of Stiles and Burch, like their 2-deg functions, have the advantage over the CIE 2-deg functions in that they were measured directly and thus do not depend on unnecessary photometric assumptions.

    The 10-deg CMFs reflect a lower macular pigment density than the 2-deg functions, since macular pigmentation declines with eccentricity. They also reflect a narrowing of the underlying cone spectral sensitivities, since cone outersegments become shorter with increasing eccentricity, thus reducing the axial optical pigment density in the cone outer segment.

References

Stiles, W. S., & Burch, J. M. (1959). NPL colour-matching investigation: Final report. Optica Acta, 6, 1-26.

Stockman, A., & Sharpe, L. T. (2000). Spectral sensitivities of the middle- and long-wavelength sensitive cones derived from measurements in observers of known genotype. Vision Research, 40, 1711-1737.

Wyszecki, G., & Stiles, W. S. (1982). Color Science: concepts and methods, quantitative data and formulae. (2nd ed.). New York: Wiley.