Abstract: System and method for optically verified sample authentication are described herein.

Abstract: System and method for optically verified sample authentication are described herein.

Abstract: A system to authenticate and identify items is described herein. An example apparatus includes an illuminating source to illuminate a sample with a first emission of light having a peak wavelength at a first wavelength and a second emission of light having a peak wavelength at a second wavelength, a photo element to detect a first optical response emitted by the sample after the first emission of light and to detect a second optical response emitted by the sample after the second emission of light, and an identifier to identify the sample based on the first optical response and the second optical response.

Abstract: Apparatus and method to authenticate 3D printer consumables are described herein. An example 3D printer includes a consumable used by the three-dimensional printer to print a three-dimensional object, the consumable containing embedded ceramic particles, the ceramic particles having luminescent properties such that they emit light having a first wavelength when they are illuminated by light having a second wavelength, and a detector to detect the presence of the ceramic particles in the consumable.

Abstract: Methods and apparatus for invisible luminescent protection for financial and identification documents are described herein. An example apparatus includes an illuminating source to illuminate a sample with light having a first wavelength, a photo element to detect light having a second wavelength and to capture an image of a first pattern printed on the sample, wherein the first pattern is printed on a first area of the sample with clear ink containing inorganic, ceramic particles having a mean diameter of less than one micron and having luminescent properties such that when the particles are illuminated with light having the first wavelength, they emit light having the second wavelength.

Abstract: Secure wire marking for identification and authentication is disclosed herein. An example apparatus includes a first strand that is electrically conductive, the first strand being embedded with a first set of particles, wherein the first set of particles have a first optical response when they are illuminated by light having a first wavelength.

Abstract: A multi-layer optical barcode with security features is described herein. An example method includes illuminating a first phosphor layer on a substrate with light having a first wavelength, wherein the first phosphor layer has luminescent properties such that when it is illuminated by light having the first wavelength, it emits light having a second wavelength, the first phosphor layer is divided into a first two-dimensional grid of cells arranged in a first spatial pattern, wherein each cell of the first phosphor layer corresponds to one bit of an identification code, a first portion of the first phosphor layer is removed from a first number of cells of the first two-dimensional grid of cells to expose the substrate for the first number of cells, capturing a first image of the light emitted by the first phosphor layer having the second wavelength, determining whether the first phosphor layer is authentic based on the first image, and determining the identification code based on the first image.

Abstract: A system to authenticate and identify items is described herein. An example apparatus includes an illuminating source to illuminate a sample with a first emission of light having a peak wavelength at a first wavelength and a second emission of light having a peak wavelength at a second wavelength, a photo element to detect a first optical response emitted by the sample after the first emission of light and to detect a second optical response emitted by the sample after the second emission of light, and an identifier to identify the sample based on the first optical response and the second optical response.

Abstract: A luminescent infrared transparent sticker is disclosed herein. An example apparatus includes a substrate that is transparent with respect to light at a first wavelength and light at a second wavelength and an adhesive on a first side of the substrate, wherein the adhesive contains taggant that has luminescent properties such that when the taggant is illuminated with light at the first wavelength, it emits light at the second wavelength.

Abstract: A luminescent infrared transparent sticker is disclosed herein.

Abstract: A multi-layer optical barcode with security features is described herein. An example method includes illuminating a first phosphor layer on a substrate with light having a first wavelength, wherein the first phosphor layer has luminescent properties such that when it is illuminated by light having the first wavelength, it emits light having a second wavelength, the first phosphor layer is divided into a first two-dimensional grid of cells arranged in a first spatial pattern, wherein each cell of the first phosphor layer corresponds to one bit of an identification code, a first portion of the first phosphor layer is removed from a first number of cells of the first two-dimensional grid of cells to expose the substrate for the first number of cells, capturing a first image of the light emitted by the first phosphor layer having the second wavelength, determining whether the first phosphor layer is authentic based on the first image, and determining the identification code based on the first image.

Abstract: A vision system to authenticate documents is described herein. An example apparatus includes an illuminating source to illuminate a pattern on a sample with first infrared light having a peak wavelength at a first wavelength, wherein the pattern is printed with ink that has luminescent properties such that when the pattern is illuminated by infrared light containing the first wavelength, the pattern emits second infrared light having a peak wavelength at a second wavelength, a filter adjacent to the illuminating source, wherein the filter passes the second infrared light and the filter does not pass the first infrared light, a photo element in close proximity to the filter such that the second infrared light that passes through the filter illuminates the photo element, wherein the photo element detects the second infrared light and captures an image of the pattern, and a display to display the image captured by the photo element.

Abstract: Methods and apparatus for variable data printing for security purposes using ceramic sub-micron infrared-luminescent particles in inkjet ink. An example apparatus includes an inkjet printer containing marked ink, the marked ink containing particles consisting of rare earth doped ceramics, wherein the particles are less than one micron in size, the particles are suspended in the marked ink, and the particles have luminescent properties such that when the particles are illuminated by first electromagnetic radiation having a first wavelength, the particles emit infrared light having a peak wavelength at a second wavelength.

Abstract: Methods and apparatus for variable data printing for security purposes using ceramic sub-micron infrared-luminescent particles in inkjet ink. An example apparatus includes an inkjet printer containing marked ink, the marked ink containing particles consisting of rare earth doped ceramics, wherein the particles are less than one micron in size, the particles are suspended in the marked ink, and the particles have luminescent properties such that when the particles are illuminated by first electromagnetic radiation having a first wavelength, the particles emit infrared light having a peak wavelength at a second wavelength.

Abstract: Apparatus and methods for measuring dye concentration in liquids are described herein.

Abstract: Methods and apparatus for a long range product authenticator. An example apparatus includes a sample that produces a luminescent emission in response to illumination by electromagnetic radiation with a first wavelength, a laser to illuminate the sample with electromagnetic radiation that has the first wavelength, wherein the laser illuminates the sample during a first duration of time and does not illuminate the sample during a second duration of time, a photo element to detect the luminescent emission of the sample during the second duration of time and a lens to focus the luminescent emission of the sample onto the photo element.

Abstract: Methods and apparatus for a product authenticator and barcode scanner interlock. An example apparatus includes a barcode scanner to scan a barcode on an item and a tester to determine whether the item is authentic, wherein the tester prevents the barcode from scanning the item if the item is not authentic.