Optical device having an illusive optical effect and method of fabrication
AssigneeViavi Solutions Inc.
InventorVladimir P. Raksha
Life of this patent
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Abstract
A method is provided for manufacturing an image on a substrate, wherein the image includes an indicia and a frame. The method includes covering at least a portion the substrate with a carrier comprising magnetically alignable flakes, aligning the magnetically alignable flakes with a magnetic field of a magnetic assembly comprising a metal plate with an opening, and solidifying the carrier. The frame is formed at an edge of the opening and the indicia is visible within the frame. The magnetic assembly includes two magnets disposed so that the North pole of one magnet and the South pole of another magnet are proximate to the metal plate at opposite sides of the opening.
Claims15
A method of manufacturing an image comprising an indicia and a frame, the method comprising:
- forming the indicia on a first surface of a substrate;
- covering at least a portion of the first surface of the substrate with a carrier having magnetically alignable flakes dispersed therein;
- generating a magnetic field with a magnetic assembly comprising a metal plate surrounding an opening through the metal plate and at least two oppositely oriented magnets;
- aligning the magnetically alignable flakes with the magnetic field to form a frame of the magnetically alignable flakes at the edge of the opening, and
- solidifying the carrier;
- wherein the indicia is visible within the frame.
Dependencies are inferred from the claim text.