By Robert A. Crone
This is the 1st complete textual content at the background of colour theories given that Halbertsma's e-book of 1947. colour is mentioned in shut reference to the evolution of rules of sunshine and imaginative and prescient. The ebook has chapters at the historical Greek principles of imaginative and prescient and colour; at the contributions of Arabic technological know-how; at the clinical Revolution from Kepler to Newton; at the early historical past of the three-color speculation; at the trichromatic conception and faulty colour imaginative and prescient; and on Goethe's, Schopenhauer's and Hering's theories. New knowing of the constitution and services of the retina and the mind eventually ends up in the trendy technological know-how of colour imaginative and prescient.
A historical past of Color has been written for ophthalmologists, optometrists and others who're attracted to visible technology and its background. The publication calls for no really expert knowledge.
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Extra resources for A History of Color: The Evolution of Theories of Lights and Color
Experience with converging lenses and the inverted image in the camera obscura led finally to Kepler's theory, with which this chapter will close. But the path was difficult. Of those who took this path I name Leonardo da Vinci, Maurolyco and Della Porta, all opticists who did not dare take the decisive step to the inverted retinal image. Leonardo da Vinci is the first to compare the eye to the eamera obseura. The instrument had already helped hirn to demonstrate that crossing of speeies occurs in the 'pupil' of the camera obscura.
Kepler relates how he tortured hirnself until he was nearly out of his mind, in an attempt to construct (in Leonardo's manner) double crossing of the rays. Finally, he gave in. Vision thus arises from the image of a visible object on the white concave screen of the retina; what outside on the right is appears on the left side of the screen, what on the left is on the right, what above is below and wh at below is above. Green also appears as green, and every possible thing appears inside in its own color .
As ideas, on the one hand, belong to the immaterial order of cogitation and, on the other hand, are represented by material processes, there must be a place somewhere in the brain where mind and body meet and exert influence on each other . According to Descartes, this is the conarium, the pineal body. It seems to be the obvious place for contact between mind and body. It is small and therefore an appropriate seat for the immaterial and spaceless mind; it is also singular and thus a suitable meeting-pi ace for the sensory impressions from the two eyes, the two ears and the other senses; in short it is a suitable organ of 'common sense', sensorium commune.