Patent ID: 9213882
Filing Date: 2015-12-15
Classification: G06K

Abstract:
1. A device of extracting data from an identifiable monochromatic pattern, said device comprising: an optical assembly having a mask with at least one concentric ring for separating a polychromatic optical signal received from an object with an identifiable monochromatic pattern into a plurality of wavelength components; an image sensor which separately captures each of said plurality of wavelength components in one of a plurality of color channels; and a processing unit which reconstructs a plurality of images each from a different color channel of said plurality of color channels that includes a different wavelength component of said plurality of wavelength components, detects said identifiable monochromatic pattern in at least one of said plurality of images, and extracts data associated with or encoded by said identifiable monochromatic pattern; wherein each of said plurality of images has a different depth of field, wherein said at least one concentric ring for optically delivering an exhibited phase shift of Π (modulus 2π) for a first wavelength component a phase shift of 0 (mod 2π) for the second wavelength component, and an exhibited phase shift of Π/2 (mod 2π) for the third wavelength component.