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Modulated Laser Pointer Disclosure Number: IPCOM000237673D
Publication Date: 2014-Jul-02
Document File: 2 page(s) / 23K

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A system for using the beam of a laser pointer as the carrier for a signal that uniquely identifies the device.

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Modulated Laser Pointer

    The abuse of laser pointers to temporarily blind aircraft pilots, train drivers, and others has received significant press coverage over the past few years. Standards efforts, such as the SAE G10T Laser safety hazards committee have reported on the dangers. Public agencies have tried to define legal use:,, .html. Public bodies are considering various forms of prohibition on the possession of these devices -restrictions.php.

    Communication systems use modulated lasers as signal carriers, so the modulation of a laser is generally well-understood. This modulation can be sufficiently high-frequency to have no effect on the usefulness of the laser as a pointing device, while simultaneously identifying the individual laser with, for example, a serial number. Installing receivers on vulnerable targets such as an airplane windscreen would assist in the identification of the device that was used.

    We propose a system for embedding a unique identifier into laser pointers that have been deemed to be dangerous. We would hope that such a system would become mandatory for sale or possession of these devices. Such a law may help to resolve the differences between people who wish to use these devices legitimately, and those who wish to see them banned all together.

    A system for using the beam of a laser pointer as the carrier for a signal that uniquely identifies the device.

    A similar modification to laser pointers has been implemented to carry audio signals in amplitude-modulated laser pointer beams. The primary difference is that the fixed identifier will be transferred with low-amplitude, short-duration pulses, not requiring the external input of audio data, and not exhibiting noticeable flicker in the beam.

    One example implementation would be based o...