Illumination for projecting an image
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United States of America Patent
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Mar 8, 2011
Issued Date -
N/A
app pub date -
Jul 16, 2007
filing date -
Jul 17, 2006
priority date (Note) -
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Abstract
The invention is directed to a method for illuminating an object and projecting its image on a ground glass screen. Optical comparators conventionally use incandescent illumination, either mercury arc or halogen. The use of an array of high intensity LED devices, provides many options for packaging the required optical components used in comparators.
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