Note 1: Conversions from Illuminance Units to Luminance units are valid only for a Lambertian surface having perfect reflectance.
Note 2: Human cone has a length of 25 microns, a cross section of 2 microns square and a linear optical density of 0.016 OD/micron; media absorption is 0.64 at 555 nm and quantum efficiency 0.67
Note 3: Troland conversion is based on 683 lumens/watt and a nodal point to retina distance of 15 mm.
Note 4: Pupil diameter is 2mm.
An invitation to visit my Phototransduction model.
References:1- Hurvich, L.M. and Jameson, D. The perception of brightness and darkness, Allyn and Bacon, Inc.,Boston 1966.
2- Makous, W.L. Fourier models and the loci of adaptation, J. Opt. Soc. Am. A, 14, 2323-2345, 1997
3- Ryer, A. Light Measurement Handbook
4- Le Grand, Y. Optique physiologique, Tome II , Masson et Cie , Éditeurs, Paris, 1972