Computer generated holographic microtags

Title: Computer generated holographic microtags

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Abstract

A microlithographic tag comprising an array of individual computer generated holographic patches having feature sizes between 250 and 75 nanometers is disclosed. The tag is a composite hologram made up of the individual holographic patches and contains identifying information when read out with a laser of the proper wavelength and at the proper angles of probing and reading. The patches are fabricated in a steep angle Littrow readout geometry to maximize returns in the -1 diffracted order. The tags are useful as anti-counterfeiting markers because of the extreme difficulty in reproducing them. 5 figs.

Inventors:: Sweatt, W C

Issue Date:: 1998-03-17

Research Org.:: Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)

Sponsoring Org.:: USDOE, Washington, DC (United States)

OSTI Identifier:: 597142

Patent Number(s):: 5729365

Application Number:: PAN: 8-583,889; TRN: 98:004646

Assignee:: Sandia Corp., Albuquerque, NM (United States)

DOE Contract Number:: AC04-94AL85000

Resource Type:: Patent

Resource Relation:: Other Information: PBD: 17 Mar 1998

Country of Publication:: United States

Language:: English

Subject:: 05 NUCLEAR FUELS; IDENTIFICATION SYSTEMS; MINIATURIZATION; DESIGN; HOLOGRAPHY; READOUT SYSTEMS; CRIME; USES; SECURITY

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                    Sweatt, W C. Computer generated holographic microtags.  United States: N. p., 1998. 
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                    Sweatt, W C. Computer generated holographic microtags.  United States.

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                    Sweatt, W C. Tue .  
        "Computer generated holographic microtags".  United States.

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@article{osti_597142,

  title        = {Computer generated holographic microtags},

  author       = {Sweatt, W C},

  abstractNote = {A microlithographic tag comprising an array of individual computer generated holographic patches having feature sizes between 250 and 75 nanometers is disclosed. The tag is a composite hologram made up of the individual holographic patches and contains identifying information when read out with a laser of the proper wavelength and at the proper angles of probing and reading. The patches are fabricated in a steep angle Littrow readout geometry to maximize returns in the -1 diffracted order. The tags are useful as anti-counterfeiting markers because of the extreme difficulty in reproducing them. 5 figs.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {1998},

  month        = {3}

}

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Computer generated holographic microtags

Patent Sweatt, William C [Albuquerque, NM]

A microlithographic tag comprising an array of individual computer generated holographic patches having feature sizes between 250 and 75 nanometers. The tag is a composite hologram made up of the individual holographic patches and contains identifying information when read out with a laser of the proper wavelength and at the proper angles of probing and reading. The patches are fabricated in a steep angle Littrow readout geometry to maximize returns in the -1 diffracted order. The tags are useful as anti-counterfeiting markers because of the extreme difficulty in reproducing them.
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