The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 27, 1994
Filed:
Sep. 10, 1993
Applicant:
Inventor:
Peter R Forman, Los Alamos, NM (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B / ; G01B / ; H01J / ;
U.S. Cl.
CPC ...
385 37 ; 385 15 ; 385 38 ; 385 12 ; 356 32 ; 356 355 ; 356345 ; 356347 ; 359 15 ; 359 27 ; 359 34 ; 25022718 ; 25022719 ; 25022714 ;
Abstract
An optical security system enables the integrity of a container seal to be remotely interrogated. A plurality of Bragg gratings is written holographically into the core of at least one optical fiber placed about the container seal, where each Bragg grating has a predetermined location and a known frequency for reflecting incident light. A time domain reflectometer is provided with a variable frequency light output that corresponds to the reflecting frequencies of the Bragg gratings to output a signal that is functionally related to the location and reflecting frequency of each of the Bragg gratings.