Développement d'une méthode de photométrie visuelle mésopique

摘要

We prose a new method of heterochromatic visual photometry based on a spatially structured stimulus (HSSP : Heterochromatic Spatial Structre Photometry). For this purpose, we have built a new apparatus including to the optics and the visual detector in order to present simultaneously the observer a reference and a spectral test respectively displayed on the odd and even bars of an adjustable two-colour grating. Results collected at 6 mesopic retinal levels (10↑（-3） to 10↑(2)Td),for spectral lights, by 3 observers, have validated the HSSP method. We have discriminated the activity of the visual photorecep tors, rods and cones, in the visual match. We insist on the need for con- trolling the eccentricity and the spatial frequency of the stimulus. This new method offers a possibility of standardization of mesopic photometry in the future.