Currency acceptor, and light source for use therein
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United States of America Patent
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Jan 31, 2006
Grant Date -
Jun 26, 2003
app pub date -
Dec 11, 2002
filing date -
Dec 20, 2001
priority date (Note) -
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Abstract
A multi-wavelength light source for use in a banknote validator comprises a housing containing a plurality of LEDs and a window for releasing light emitted by the LEDs. Visible wavelengths have a direct path to a diffuser located in the window. Infra-red wavelengths have to be diffusively reflected by the interior of the housing before they reach the diffuser, and thereby suffer greater attenuation that the visible wavelengths. The diffuser acts as a substantially point-like light source.
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