Chemical synthesis using diffraction grating-based encoded optical elements
First Claim
1. An optical identification element attached to a chemical, comprising:
- an optical substrate;
at least a portion of said substrate having at least one diffraction grating disposed therein, said grating having at least one refractive index pitch superimposed at a common location;
the grating providing an output optical signal when illuminated by an incident 10 light signal;
said optical output signal being indicative of a code in said substrate; and
the chemical being attached to said substrate.
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Accused Products
Abstract
An assay stick 7 includes a transparent reaction vessel or tube 14 having one or more microbeads 8 disposed therein. The microbeads 8 have a plurality of unique identification digital codes based on a diffraction grating 12 disposed therein that are detected when illuminated by incident light 24. The incident light 24 may be directed transversely onto the side or onto an end of the tube 14 with a narrow band (single wavelength) or multiple wavelength source, in which case the code is represented by a spatial distribution of light or a wavelength spectrum, respectively. The assay stick 7 may be reused or disposed upon completion of the assay.
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Citations
20 Claims
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1. An optical identification element attached to a chemical, comprising:
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an optical substrate;
at least a portion of said substrate having at least one diffraction grating disposed therein, said grating having at least one refractive index pitch superimposed at a common location;
the grating providing an output optical signal when illuminated by an incident 10 light signal;
said optical output signal being indicative of a code in said substrate; and
the chemical being attached to said substrate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 20)
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18. A microparticle attached to a chemical comprising:
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an optical substrate;
at least a portion of said substrate having at least one diffraction grating disposed therein, said grating having at least one refractive index pitch superimposed at a common location;
the grating providing an output optical signal when illuminated by an incident light signal;
said optical output signal being indicative of a code in said substrate; and
the chemical being attached to said substrate.
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19. A method of synthesizing a chemical on an optical element, comprising:
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obtaining a optical element, comprising;
an optical substrate;
at least a portion of the substrate having at least one diffraction grating disposed therein, the grating having at least one refractive index pitch superimposed at a common location;
the grating providing an output optical signal when illuminated by an incident light signal; and
the optical output signal being indicative of a code; and
attaching a chemical to the element.
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Specification