Columns
Quantal
Logarithmic
Energy
Logarithmic
Linear
Notes
2° cone
spectral sensitivities: log L2(λ) or log
The cone spectral sensitivities
are defined as linear combinations of the Stiles
and Burch (1959) 10-deg CMFs,
Stockman, Sharpe & Fach
(1999) and Stockman and Sharpe (2000) estimated the five unknowns from L- and
M-cone spectral sensitivity measurements in single-gene red-green dichromats,
S-cone spectral sensitivity measurements in blue
cone monochromats and normals, and from existing color matching
data. The estimates are
For further details, see Stockman, Sharpe & Fach (1999) and Stockman & Sharpe (2000). Stockman, Sharpe & Fach (1999) were unable to measure S-cone spectral sensitivity data after 615 nm, after which S(λ) is so small that it can reasonably, for most purposes, be set to zero.
Stiles, W. S. & Burch, J. M. (1959). NPL colour-matching investigation: Final report. Optica Acta, 6, 1-26.
Stockman, A., Sharpe, L. T., & Fach, C. C. (1999). The spectral sensitivity of the human short-wavelength cones. Vision Research, 39, 2901-2927.
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.