Vision System to Authenticate Documents

摘要

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.

主权项

1. An apparatus comprising:
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.