Print Email Facebook Twitter On threshold mechanisms for achromatic and chromatic vision Title On threshold mechanisms for achromatic and chromatic vision Author Bouman, M.A. Walraven, P.L. Instituut voor Zintuigfysiologie TNO Publication year 1972 Abstract On the basis of measurements of the achromatic zone for red light in the fovea and for green light in the periphery, a discussion is given on the possible difference in threshold mechanisms for the achromatic (scotopic) and chromatic (photopic) retinal systems. A specific suggestion for this distinction is given that not directly refers to the usual rod-cone concept but is based on the occurrence of multiple coincidence of quantum absorptions by multiple hits per receptor no matter rod or cone as photopic signals, versus multiple coincidences by single hits per receptor in a distinct ommatidium type group of receptors as scotopic signals. Subject Visionarticlecolor visiondifferential thresholdhumanphotoreceptorphysiologypsychophysicsretinavisionColor PerceptionDifferential ThresholdHumanPhotoreceptorsPsychophysicsRetinaVision To reference this document use: http://resolver.tudelft.nl/uuid:a4ffa154-e9c3-4fff-aeb0-fffe9e9ef785 TNO identifier 4370 Source Acta Psychologica, 36 (3), 178-189 Document type article Files To receive the publication files, please send an e-mail request to TNO Library.