Beam splitter
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United States of America Patent
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Issued Date -
Aug 5, 2010
app pub date -
Feb 2, 2009
filing date -
Feb 2, 2009
priority date (Note) -
Abandoned
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Abstract
A device for splitting light between the visible light spectrum and the near infrared light spectrum, particularly for separating reflected light between the visible light spectrum and the near infrared light spectrum, in determining multiple characteristics of product in a product scanning system. The invention also pertains to sorting machines that optically sort or separate nonstandard fungible objects from standard objects as they pass a viewing station by viewing such objects in at least two different wavelength spectrums and particularly to such sorting machines utilizing detector elements comprised of two or more different photo-sensitive devices and to the optical detection system used therein. The device includes a hermetically-sealed device with two transparent prisms between which is sandwiched indium tin oxide (ITO) selected to exhibit dielectric behavior in the VIS/NIR and metallic behavior in the NIR band.
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