Detecting and thwarting imaging systems at theatrical...

Details Detecting and thwarting imaging systems at theatrical... Detecting and thwarting imaging systems at theatrical...

2005-12-20

2005-12-20

Porta, David (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

C250S208200, C380S201000, C386S349000

Reexamination Certificate

active

06977366

ABSTRACT:
A system and method of detecting and thwarting the use of unauthorized imaging systems at theatrical performances. Sensors are deployed at a theatrical event to detect the IR focusing signal and/or the RF signal of an unauthorized imaging device. De-focusing signals are used to disrupt the auto focus system of imaging devices that do not use IR focusing systems. A thwarting signal comprising invisible light frequencies may be combined to produce a thwarting signal that is received by the CCD of an imaging device as white light thereby rendering the recorded image unusable.

REFERENCES:
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patent: 2004/0091110 (2004-05-01), Barkans
patent: 1 057 323 (2002-02-01), None
patent: WO 00/74366 (2000-12-01), None
Gary Brown, “How Autofocus Cameras Work”, Internet article, http://travel.howstuffworks.com/autofocus.htm.

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