Diffraction gratings used as identifying markers

Patent Application · Thu Aug 03 00:00:00 EDT 1989

OSTI ID:5878731

Deason, V A; Ward, M B

A finely detailed defraction 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 defraction grating is mapped by diffraction moire techniques and recorded for comparison with future readings of the same grating. 7 figs.

• Research Organization: EG and G Idaho, Inc., Idaho Falls, ID (USA)
• Sponsoring Organization: USDOE; USDOE, Washington, DC (USA)
• DOE Contract Number: AC07-76ID01570
• Assignee: Dept. of Energy
• Patent Number(s): PATENTS-US-A7388880
• Application Number: ON: DE91011603; PPN: US 7-388880
• OSTI ID: 5878731
• Country of Publication: United States
• Language: English

Related Subjects

47 OTHER INSTRUMENTATION
98 NUCLEAR DISARMAMENT, SAFEGUARDS, AND PHYSICAL PROTECTION
DIFFRACTION GRATINGS
DESIGN
IDENTIFICATION SYSTEMS
ARMS CONTROL
INFORMATION VALIDATION
INSPECTION
INTERFEROMETRY
INVENTIONS
VERIFICATION
GRATINGS
TESTING
VALIDATION
440600* - Optical Instrumentation- (1990-)
350300 - Arms Control- Verification- (1987-)