Optical: systems and elements – Deflection using a moving element – Using a periodically moving element
Patent
1996-12-31
1999-10-26
Bacares, Rafael
Optical: systems and elements
Deflection using a moving element
Using a periodically moving element
359172, 359189, 250214AL, H04B 1000
Patent
active
059738111
ABSTRACT:
A portable directional multi-channel receiver comprises a non-visual communicator, a self-contained source of electrical energy, a detector for receiving an amplitude modulated lightwave signal with at least two different frequency modulated subcarrier frequencies, and electronics converting the received signals into intelligible non-visual communication emanating from the communicator both in the presence and in the absence of an ambient background of light energy, such as sunlight. The device is adapted for use by the visually impaired, as well as those who are not fluent in the relevant printed language, in finding desired locations from which suitable modulated infrared signals are emitted.
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Bacares Rafael
Patty II R. Andrew
Sieberth John F.
Talking Signs, Inc.
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