Raynauld's Light unit Converter

Input value Converted Value
Convert From Convert To:
Value in Selected Unit

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.

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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