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CRT Phosphor Subtraction System Disclosure Number: IPCOM000053092D
Original Publication Date: 1981-Aug-01
Included in the Prior Art Database: 2005-Feb-12

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Fritz, RJ [+details]


This arrangement for a CRT scanner uses an optical beam splitter to divide the light from the CRT into a first portion directed to the document via a folded optical system and a second portion directed to a photo-multiplier which detects variation in the light output of the CRT.