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About Optical Triangulation Position Sensors
Optical triangulation position sensors use reflected waves to pinpoint position and displacement. The source of these waves may be a light emitting diode (LED), infrared (IR) light, or laser. Most optical triangulation position sensors house the sensor itself with the emitter. The sensor detects the beam that is reflected from the surface or object and provides an output that varies with the distance. Outputs for optical triangulation position sensors include analog current, analog voltage, and frequency. Digital, serial, and parallel outputs are also available, along with alarms and changes in state of switches.
Typically, the sensing component for optical triangulation position sensors is either a charged coupled device (CCD) or a photodiode (PSD). The sampling rate is important, as this specification may determine the suitability of optical triangulation position sensors for specific applications. Beam patterns are designated as point, line, or area. To achieve a line pattern, many point-style sensors are used together in a line. To create an area scan, several optical triangulation position sensors are used together in a matrix or other shape.
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Engineering Web: Optical Triangulation Position Sensors
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