Energy, Quanta, and Vision
Author | : Selig Hecht |
Publisher | : |
Total Pages | : 22 |
Release | : 1942 |
Genre | : Eye |
ISBN | : |
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Author | : Selig Hecht |
Publisher | : |
Total Pages | : 22 |
Release | : 1942 |
Genre | : Eye |
ISBN | : |
Author | : Maarten Anne Bouman |
Publisher | : Springer |
Total Pages | : 102 |
Release | : 2013-11-09 |
Genre | : Medical |
ISBN | : 9401760632 |
Author | : |
Publisher | : |
Total Pages | : 338 |
Release | : 1965 |
Genre | : |
ISBN | : |
Author | : Albert Rose |
Publisher | : Springer Science & Business Media |
Total Pages | : 204 |
Release | : 2013-06-29 |
Genre | : Technology & Engineering |
ISBN | : 1468420372 |
The content of this monograph stems from the writer's early involvement with the design of a series of television camera tubes: the orthicon, the image orthicon and the vidicon. These tubes and their variations, have, at different times been the "eyes" of the television system almost from its inception in 1939. It was natural, during the course of this work, to have a parallel interest in the human visual system as well as in the silver halide photographic process. The problem facing the television system was the same as that facing the human visual and the photographic systems, namely, to abstract the maximum amount of information out of a limited quantity oflight. The human eye and photographic film both repre sented advanced states of development and both surpassed, in their performance, the early efforts on television camera tubes. It was particularly true and "plain to see" that each improvement and refinement of the television camera only served to accentuate the remarkable design of the human eye. A succession of radical advances in camera-tube sensitivity found the eye still operating at levels of illumination too low for the television camera tube. It is only recently that the television camera tube has finally matched and even somewhat exceeded the performance of the human eye at low light levels. It was also clear throughout the work on television camera tubes that the final goal of any visual system-biological, chemical, or electronic-was the ability to detect or count individual photons.
Author | : Colin Blakemore |
Publisher | : Cambridge University Press |
Total Pages | : 472 |
Release | : 1993-05-13 |
Genre | : Medical |
ISBN | : 9780521447690 |
Professor Colin Blakemore presents a fascinating insight to all the major topics in visual science research.
Author | : Helga Kolb |
Publisher | : |
Total Pages | : |
Release | : 2007 |
Genre | : |
ISBN | : |
Author | : Maarten Anne Bouman |
Publisher | : |
Total Pages | : 70 |
Release | : 1960 |
Genre | : Physiological optics |
ISBN | : |
Author | : United States. National Advisory Neurological Diseases and Blindness Council. Subcommittee on Vision and Its Disorders |
Publisher | : |
Total Pages | : 246 |
Release | : 1968 |
Genre | : Eye |
ISBN | : |
Author | : Hessel de Vries |
Publisher | : |
Total Pages | : 4 |
Release | : 1949 |
Genre | : |
ISBN | : |
Author | : Hugh Davson |
Publisher | : Academic Press |
Total Pages | : 819 |
Release | : 2014-05-12 |
Genre | : Medical |
ISBN | : 1483259870 |
The Eye: Volume 2, The Visual Process is a compendium of papers that describes the physiology of the eye, particularly the visual functions, the photobiology of the visual process, and the visual pathway. One paper describes the light stimuli used in physiological experiments concerning vision in terms of their spectral energy distribution, particularly the amounts of light absorbed by the photosensitive substances contained in the retinal receptors. Another paper explains the mosaic-like arrangement of the receptors and the variations of this mosaic in the different regions of the retina, including the Purkinje phenomenon which can cause errors in visual measurements. One paper examines the directional properties of the rods at long wavelengths and the theory of the Stiles-Crawford effect. Other papers investigate the limits of the visible spectrum, the scotopic luminous efficiency, theories of dark-adaptation, as well as the minimum retinal illumination, the minimum flux of energy, and the minimum amount necessary for vision. One paper notes that whereas one rod can be stimulated by one quantum (a discrete process involving one pigment molecule), it is not sufficient to make a human subject see a light stimulus. The compendium is invaluable for researchers and investigators involved in physiology, psychology, ophthalmology, and in all branches of ocular physiology.