Diffraction gratings used as identifying markers

Patent · Tue Mar 26 00:00:00 EST 1991

OSTI ID:7102255

Deason, V A; Ward, M B

A finely detailed diffraction grating is applied to an object as an identifier or tag which is unambiguous, difficult to duplicate, or remove and transfer to another item, and can be read and compared with prior readings with relative ease. The exact pattern of the diffraction grating is mapped by diffraction moire techniques and recorded for comparison with future readings of the same grating. 7 figures.

• DOE Contract Number: AC07-76ID01570
• Assignee: Dept. of Energy, Washington, DC (United States)
• Patent Number(s): US 5003600; A
• Application Number: PPN: US 7-388880
• OSTI ID: 7102255
• Resource Relation: Patent File Date: 3 Aug 1989
• Country of Publication: United States
• Language: English

Related Subjects

98 NUCLEAR DISARMAMENT, SAFEGUARDS, AND PHYSICAL PROTECTION
DIFFRACTION GRATINGS
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