OPTICAL SECURITY TAG

摘要

A security tag or device for use with a product package. The security tag has an optical sensor that detects ambient radiation (or light, if any) within the package interior (e.g., from a source outside the package). The optical sensor is temporarily limited from detecting the ambient radiation within the package by a lock section. A device may be provided to activate the lock section so that the optical sensor can detect light in the package. The optical sensor can be aligned with an opening in the package after the lock section is activated. After calibration, the optical sensor is used to determine changes in detected ambient radiation within the package. The security tag has an alarm adapted to provide an alert when a change (e.g., above a threshold) in intensity of ambient radiation within a package is detected by the optical sensor.

主权项

1. A security tag for a package comprising:
a housing with a battery therein; an optical sensor configured to detect ambient radiation within the package; a circuit configured to connect the battery and the optical sensor; an alarm or indicator further connected to the circuit and adapted to provide an alert; an attachment portion for attaching the housing to the package, the attachment portion comprising a lock section that limits the optical sensor from detecting the ambient radiation within the package; and a device for activating the lock section; wherein the optical sensor is configured to detect changes of intensity of the ambient radiation within the package, and wherein the optical sensor is configured to activate the alarm or indicator and provide the alert upon detection of a change in intensity above a threshold level.