Combined illuminator/light collectors for optical readers
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United States of America Patent
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Nov 15, 2016
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N/A
app pub date -
Dec 13, 2012
filing date -
Dec 12, 2011
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Abstract
Combined illuminator/light collectors (I/LCs) that provide measurement and/or reference light to a target and collect light from the target. One example of a use for a combined I/LC of the present disclosure is for an optic of an optical reader used to read one or more chemical indicators that undergo physical changes that can be optically detected. The combined I/LC includes a spot lensing designed and configured in conjunction with the target to provide spot illumination on the target from one or more light sources. A light collector collects light from the target resulting from the spot illumination. Some embodiments further include dispersive lensing to direct a portion of the light from each light source away from the spot illumination to keep that light from interfering with the spot illumination.
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