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Books > Professional & Technical > Mechanical engineering & materials > Materials science > Testing of materials
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Vision - Human and Electronic (Paperback, Softcover reprint of the original 1st ed. 1973)
Loot Price: R3,082
Discovery Miles 30 820
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Vision - Human and Electronic (Paperback, Softcover reprint of the original 1st ed. 1973)
Series: Optical Physics and Engineering
Expected to ship within 18 - 22 working days
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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."
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