Optical: systems and elements – Diffraction – From grating
Reexamination Certificate
2007-03-13
2007-03-13
Lavarias, Arnel (Department: 2872)
Optical: systems and elements
Diffraction
From grating
C435S288700, C436S518000
Reexamination Certificate
active
10661254
ABSTRACT:
An optical identification element having a synthesized chemical attached thereto includes an optical substrate having at least one diffraction grating disposed therein, the grating having a resultant refractive variation at a grating location, said grating being embedded within a substantially single material of said optical substrate; the grating providing an output optical signal indicative of a code when illuminated by an incident light signal propagating in free space, the code identifying at least one of the element and the chemical, the output signal not being a result of laser action with the grating when illuminated by said incident light signal; and the synthesized chemical being attached to the substrate.
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pate
Moon John
Putnam Martin A.
CyVera Corporation
Lavarias Arnel
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