SYSTEM AND METHOD FOR ENCRYPTION OF A HOLOGRAPHIC IMAGE
First Claim
1. A method for encrypting a holographic image, comprisingproducing a beam of light having at least two wavelengths of light;
- splitting the beam of light into an illumination beam and a reference beam;
adding amplitude information to the illumination beam with an intensity control device to form an object beam;
selecting wavelength information in the object beam to form a spatial color modulated object beam; and
directing the reference beam and the spatial color modulated object beam to a predetermined location on a holographic media to enable the reference beam and the spatial color modulated object beam to form an interference pattern on the holographic media.
1 Assignment
0 Petitions
Accused Products
Abstract
A system and method for encryption of a holographic image is disclosed. The method includes the operation of producing a beam of light having at least two wavelengths of light. The beam of light can be split to form an illumination beam and a reference beam. Amplitude information can be added to the illumination beam with an intensity control device to form an object beam. Wavelength information can be selected in the object beam to form a spatial color modulated object beam. The reference beam and spatial color modulated object beam can be directed to a predetermined location on the holographic media to interfere to record an interference pattern.
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Citations
20 Claims
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1. A method for encrypting a holographic image, comprising
producing a beam of light having at least two wavelengths of light; -
splitting the beam of light into an illumination beam and a reference beam; adding amplitude information to the illumination beam with an intensity control device to form an object beam; selecting wavelength information in the object beam to form a spatial color modulated object beam; and directing the reference beam and the spatial color modulated object beam to a predetermined location on a holographic media to enable the reference beam and the spatial color modulated object beam to form an interference pattern on the holographic media. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A system for encryption of a holographic image, comprising:
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a light source for a beam of light having at least two wavelengths of light; a beam splitter configured to split the beam of light into an illumination beam and a reference beam; an intensity control device configured to add amplitude information to the illumination beam to form an object beam; a spatial color modulator configured to add wavelength information to the object beam to form a spatial color modulated object beam; an optical redirection device for directing the spatial color modulated object beam and the reference beam to a predetermined location on a holographic media to enable the reference beam and spatial color modulated object beam to form an interference pattern on the holographic media. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A system for encryption of a holographic image, comprising:
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a means for producing a beam of light having at least two wavelengths of light; a means for splitting the beam of light into an illumination beam and a reference beam; a means for adding amplitude information to the illumination beam to form an object beam; a means for selecting wavelength information in the object beam to form a spatial color modulated object beam; and a means for directing the reference beam and the spatial color modulated object beam to a predetermined location on a holographic media to enable the reference beam and the spatial color modulated object beam to form an interference pattern on the holographic media. - View Dependent Claims (17)
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18. A method of making a holographic printer configured to print an encrypted hologram, comprising:
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providing a light source configured to emit a light beam having at least two wavelengths; positioning a light dividing means configured to split the light beam into a reference beam and an illumination beam; positioning an intensity control device configured to add amplitude information to the illumination beam to form an object beam; locating a spatial color modulator in a path of the object beam to form a spatial color modulated object beam; situating a beam redirection means in a path of at least one of the spatial color modulated object beam and the reference beam to direct the reference beam and the spatial color modulated object beam to a substantially similar location on a holographic media to form an interference pattern on the holographic media. - View Dependent Claims (19)
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20. An article of manufacture comprising:
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a computer readable medium having computer readable program code means embodied therein for causing a printer to print an encrypted digital hologram, the computer readable program code means in said article of manufacture comprising; computer readable code means for causing a light source to transmit a light beam having at least two wavelengths directed toward a splitting means, wherein the splitting means is configured to split the light beam into a reference beam and an illumination beam, the reference beam being directed toward a holographic media and the illumination beam being directed toward an intensity control device followed by a spatial color modulator comprising a two dimensional array of color selection modules, wherein a plurality of the color selection modules have an adjustable cavity size; and computer readable code means for causing a computer to control a driver circuit, the driver circuit being electrically coupled to the spatial color modulator, wherein the driver circuit is configured to vary a voltage between a plurality of slidable mirrors and a base to provide an electrostatic charge sufficient to change a cavity size in each of the plurality of color selection modules to select a wavelength of an object beam to form a spatial color modulated object beam, wherein the spatial color modulated object beam is directed toward the holographic media to interfere with the reference beam and form an interference pattern on the holographic media.
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Specification