Illumination apparatus, image sensor unit, and paper sheet distinguishing apparatus
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United States of America Patent
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Aug 9, 2016
Grant Date -
Jun 19, 2014
app pub date -
Sep 6, 2013
filing date -
Sep 7, 2012
priority date (Note) -
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Abstract
An illumination apparatus includes: a light source that emits light at a plurality of wavelengths; and a rod-like light guide that shapes light emitted by the light source into a line, wherein the light guide is made of a material including a region in which transmittance of wavelengths is not constant, the light source is arranged at one end of the light guide in a longitudinal direction, the light source includes a wavelength of a region in which transmittance of the light guide is not constant, and a reflection surface including reflection member having reflectance differences for the light at a plurality of wavelengths is formed at the other end of the light guide in the longitudinal direction.
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