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US 8,717,650 B2Granted
Method and system for producing multiple images in a single image plane using diffraction
AssigneeStamper Technology, Inc.
InventorBruce Ha
Life of this patent
Estimating the term…
Abstract
Methods create images viewable under different selected angles on optical storage devices and other photosensitive surfaces and optical storage devices with super-imposed images. Generally, a photosensitive surface is exposed with multiple diffraction patterns creating super-imposed images. These diffraction patterns create super-imposed images on the photosensitive surfaces, which can be read by either a human or a computer.
Claims9
A method for pressing a disc, comprising:
- providing a disc configured to be pressed by a stamper;
- and
- pressing the disc with the stamper to form a plurality of diffractive elements on the disc, wherein the stamper is formed by:
- exposing, solely by a single spherical wavefront, a rotating photosensitive substrate a first time to form a plurality of first diffractive elements, wherein the plurality of first diffractive elements are reconstructable to form a first image viewable at a first angle;
- exposing, solely by the single spherical wavefront, the rotating photosensitive substrate a second time to form a plurality of second diffractive elements, wherein the plurality of second diffractive elements are reconstructable to form a second image viewable at a second angle different from the first angle;
- and
- replicating the photosensitive substrate.
4 more elements
A method for pressing a disc, comprising:
- providing a disc configured to be pressed by a stamper;
- and
- pressing the disc with the stamper to form a plurality of diffractive elements on the disc,
- wherein the stamper is formed by replicating a master,
- wherein the master is formed by exposing a rotating photosensitive substrate to a single laser beam wavefront, wherein the exposing is accomplished without a reference beam impacting the rotating photosensitive substrate, and wherein the exposing is accomplished with one laser beam impact point.
2 more elements
Dependencies are inferred from the claim text.