ENCODED MICROPARTICLES AND A METHOD FOR FABRICATING
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Accused Products
Abstract
A method for fabricating microparticles is provided. The method includes providing a removable substrate that has a photosensitive material. The substrate has a plurality of inner regions. Each inner region surrounds a corresponding outer region. The method also includes providing at least one optically detectable code within at least one of the inner regions of the substrate and etching lines into the substrate to create a plurality of microparticles having at least one optically detectable code therein. The microparticles have elongated bodies that extend in an axial direction. The optically detectable codes extend in the axial direction within the microparticles.
127 Citations
63 Claims
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1-13. -13. (canceled)
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14. An optical arrangement for fabricating an optical identification element, the optical arrangement comprising:
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means for providing a removable substrate having a photosensitive material fabricated thereon; means for writing one or more gratings on the photosensitive material; and means for separating and creating one or more separate optical identification elements from the substrate. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27-40. -40. (canceled)
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41. A method for fabricating microparticles comprising:
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providing a removable substrate including a photosensitive material, the substrate having a plurality of gratings distributed throughout the substrate, each of the gratings providing a corresponding optically detectable code; and etching lines into the removable substrate to create a plurality of microparticles, each microparticle having at least one grating therein, the microparticles having elongated bodies that extend in an axial direction, each grating extending along the axial direction within the corresponding microparticle. - View Dependent Claims (42, 43, 44, 45, 46, 47, 48, 49, 50, 51)
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52. A method for fabricating microparticles comprising:
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providing a removable substrate including a photosensitive material, the substrate having a plurality of inner regions, each inner region surrounded by a corresponding outer region; providing at least one optically detectable code within at least one of the inner regions of the substrate; and etching lines into the substrate to create a plurality of microparticles having at least one optically detectable code therein, the microparticles having elongated bodies that extend in an axial direction, the optically detectable codes extending in the axial direction within the microparticles. - View Dependent Claims (53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63)
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Specification