Method and system to detect tampering of a closed chassis using a passive fiber optic sensor
First Claim
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1. A passive optical anti-tamper system, the system comprising:
- one or more light pipes each including an input end and an output end, the one or more light pipes located within a chassis, wherein the one or more light pipes comprise a plurality of optical fibers bundled to form a bundled-output end and wherein the input ends of the plurality of optical fibers are unbundled;
one or more light detectors located within the chassis, the one or more light detectors optically coupled to the output ends of the one or more light pipes; and
an alarm in communication with the one or more detectors, wherein the alarm is operable to transmit a tamper-event-warning signal if an increased light level is detected by at least one detector.
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Abstract
A passive optical anti-tamper system including one or more light pipes, one or more light detectors and an alarm. The light pipes each include an input end and an output end and are located within a chassis with the one or more light detectors. The one or more light detectors are optically coupled to the output ends of the one or more light pipes. The alarm is operable to transmit a tamper-event-warning signal if an increased light level is detected by at least one detector.
26 Citations
13 Claims
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1. A passive optical anti-tamper system, the system comprising:
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one or more light pipes each including an input end and an output end, the one or more light pipes located within a chassis, wherein the one or more light pipes comprise a plurality of optical fibers bundled to form a bundled-output end and wherein the input ends of the plurality of optical fibers are unbundled; one or more light detectors located within the chassis, the one or more light detectors optically coupled to the output ends of the one or more light pipes; and an alarm in communication with the one or more detectors, wherein the alarm is operable to transmit a tamper-event-warning signal if an increased light level is detected by at least one detector. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification