Integrated optical tamper sensor with planar waveguide

Patent · Mon Jan 04 23:00:00 EST 1993

OSTI ID:6158559

Carson, R F; Casalnuovo, S A

A monolithic optical tamper sensor, comprising an optical emitter and detector, connected by an optical waveguide and placed into the critical entry plane of an enclosed sensitive region, the tamper sensor having a myriad of scraps of a material optically absorbent at the wavelength of interest, such that when the absorbent material is in place on the waveguide, an unique optical signature can be recorded, but when entry is attempted into the enclosed sensitive region, the scraps of absorbent material will be displaced and the optical/electrical signature of the tamper sensor will change and that change can be recorded.

• DOE Contract Number: AC04-76DP00789
• Assignee: Dept. of Energy, Washington, DC (United States)
• Patent Number(s): US 5177352; A
• Application Number: PPN: US 7-711235
• OSTI ID: 6158559
• Country of Publication: United States
• Language: English

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