A method for reading an identification tag is provided that includes detecting a content of particles having a first feature amount as a specific feature amount, where the particles are included in the identification tag; and distinguishing a type of the identification tag by information on the content of the particles having the first feature amount.

A wearable computing device reads near-invisible one- or two-dimensional barcodes having a size of 100 microns to one millimeter. The device includes a magnifying lens, a digital camera, a processor, program memory and a wireless communication module, all supported on a wearable device body. The wearable device body may be an eyeglass frame, a watch body or wristband, a headband or sweatband or a cap or other headgear, among other possibilities. Applications of the wearable computing device include unattended shopping in a physical retail store.

The present technology discloses smart labels to monitor physical parameters, and for traceability and authentication of objects, documents or people. This active and multifunctional label is based on spectrally and spatially multiplexed Quick Response (QR) codes (A). Spectrally selectivity is achieved using luminescent materials and spatially multiplexing is achieved using different patterns (B) combining both to design improved QR codes able to store information at different layers of accessibility. This brings advantages over the actual scenario of QR codes wherein the amount of storage information increases up to three times, adding the capability to sense physical parameters and allow to control the provided information, creating public and restricted access. To access and read the content of each layer, different illumination is used (C) to (E) and is processed using a device or via dedicated applications.

A method for determining the position of a first part moving in relation to a second part in a system, comprising forming a code on a surface of the first part or the second part, yielding an encoded surface; detecting the code on the encoded surface; decoding the code; and determining the position of the moving part from the decoding of the code; the code comprises microstructures at precisely selected positions on the surface of the encoded part; detecting the code comprises scanning the encoded surface with a sensor in conditions selected in relation to the code formed and to the encoded surface to precisely read the code on the encoded surface.

The present disclosure provides a polarized Raman spectrum-based nano barcode smart label, including: a substrate and a nanoparticle coding layer that is provided on the substrate and can be coded by polarized Raman spectrum coding, wherein the nanoparticle coding layer that can be coded by polarized Raman spectrum coding is a mixed layer including a plurality of nanomaterials having different Raman characteristic peaks; under different polarization detection states, the Raman characteristic peaks can exhibit coding characteristics that are totally different from those under a non-polarization detection state and are distinguished from those of a conventional Raman peak position, so as to achieve spectral characteristics for multiple coding. During use of the smart label of the present disclosure, a corresponding nano barcode detection system is used to detect a brand label provided with the encoded nanoparticles to obtain coding information of the brand label.

Provided is a structure for individual authentication in which a pillar pattern region including a plurality of nanopillars formed of synthetic quartz glass is formed on at least a part of a surface portion of a synthetic quartz glass substrate. In the pillar pattern region, the nanopillars have an indentation elastic modulus of 35 to 100 GPa as measured by a nanoindentation method, and the nanopillars are plastically deformed.

A method and system are provided. The method involves generating a plurality of nanoparticles, isolating fluorescent nanoparticles, embedding the fluorescent nanoparticles in a resin and applying the resin on a product. The system is for product authentication and includes a light source, fluorescence nanoparticles, a detector and a resin for applying on a product. Furthermore, a non-transitory computer readable medium encoded with codes is provided to direct the system to carry out the method.

An object marking including a first security element and at least a second security element, wherein each security element is associated with a set of data segments and each security element exhibits depending on the capturing conditions, in particular the viewing angle and/or the direction of illumination, a code segment which is an optoelectronically readable representation of one of the data segments of the set associated with the respective security element, wherein different distinct data segments are represented by different code segments and that the set associated with the first security element and the set associated with the second security element differ in at least one data segment; method for producing and method for authenticating the same.

Storage media are provided. A substrate has an array of addressable locations thereon, each addressable location adapted to be physically associated with a collection of molecules, each collection comprising at least a first subcollection of molecules and a second subcollection of molecules. The molecules in the collection are selected from a set of unambiguously identifiable molecules, the set comprising at least a first subset of molecules and a second subset of molecules. Each molecule in the first subset is identifiable by a first physical property, and each molecule in the second subset is identifiable by a second physical property, different from the first physical property. Each molecule in the set is uniquely associated with a predetermined position in a numerical value, wherein the presence of the molecule in the collection indicates a predetermined digit at the associated position and the absence of said molecule in the collection indicates a zero at said associated position.

A light emitting device for optically reproducing a coded information includes a plurality of optical components. Each of the components is configured to emit light. The combination of the light emitted from the optical components provides coded information.