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Title: Computer generated holographic microtags

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:
Issue Date:
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

Citation Formats

Sweatt, W C. Computer generated holographic microtags. United States: N. p., 1998. Web.
Sweatt, W C. Computer generated holographic microtags. United States.
Sweatt, W C. Tue . "Computer generated holographic microtags". United States.
@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}
}