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Optical wireless communications
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Optical wireless communications (OWC) is a form of optical communication in which unguided visible, infrared (IR), or ultraviolet (UV) light is used to carry a signal. It is generally used in short-range communication.
Illustration of the Laser Communications Relay Demonstration (LCRD) relaying data from ILLUMA-T on the International Space Station to a ground station
Illustration of the Laser Communications Relay Demonstration (LCRD) relaying data from ILLUMA-T on the International Space Station to a ground station on Earth.
Optical communication
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Optical communication, also known as optical telecommunication, is communication at a distance using light to carry information. It can be performed visually or by using electronic devices. The earliest basic forms of optical communication date back several millennia, while the earliest electrical device created to do so was the photophone, invented in 1880.
A naval signal lamp, a form of optical communication that uses shutters and is typically employed with Morse code (2002)
A naval signal lamp, a form of optical communication that uses shutters and is typically employed with Morse code (2002)
A replica of a Chappe telegraph tower (18th century)
A replica of a Chappe telegraph tower (18th century)
An air traffic controller holding a signal light gun that can be used to direct aircraft experiencing a radio failure (2007).
An air traffic controller holding a signal light gun that can be used to direct aircraft experiencing a radio failure (2007).