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Optical time of flight position sensors and instruments determine displacement and distance by measuring the time it takes light to travel from the instrument to a target and back. These sensors can use either lasers or LEDs as light sources. LEDs are often less powerful than lasers, limiting their effective distance. However, because LEDs are relatively weak sources of light, they do not have safety classifications and can be used in different applications than lasers can. The lasers in these sensors can be safety class I, II or III devices.

Some measurement methods analyze a single trip or a pulse of light while others calculate the measured range over a number of trips, using a continuous wave. For very long-range distance measurements (up to many miles) time of flight laser rangefinders with pulsed laser beams are used. The laser emits very brief, very intense pulses of light. The amount of time the pulse takes to reach the target and return is measured and converted to a distance measurement. The scan field for optical time of flight sensors can use a single point of light or a line, depending on the needs of the application.


Products & Services Related to Optical Sensors, Time of Flight
Cable Extension Linear Position Sensors
Cable extension linear position sensors are used to measure the movement and displacement of objects. A cable or wire is attached to an object, and as the object moves, the transducer produces an electrical signal proportional to the wire's linear extension.
Linear Position Sensors and Switches, Ultrasonic
Linear position sensors and switches, ultrasonic, are used for position and displacement sensing, using ultrasonic technology.
Linear Position Sensors, Capacitive
Capacitive linear position sensors are devices that sense position / displacement using capacitance technology.
Linear Position Sensors, Eddy Current
Eddy current linear position sensors detect the distance from a target by using magnetic fields generated by a reference and sensing coils.
Linear Position Sensors, Fiber Optic
Fiber optic linear position sensors use fiber optic technology to sense position and displacement.
Linear Position Sensors, LVDT
Linear variable differential transformer (LVDT) linear position sensors have a series of inductors in a hollow cylindrical shaft and a solid cylindrical core. These devices produce an electrical output proportional to the position of the core
Position Sensors, Optical Triangulation
Optical triangulation position sensors use reflected waves to pinpoint position and displacement.

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Engineering Web: Optical Sensors, Time of Flight
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Optical Sensors, Time of Flight. Free Registration  Optical Sensors, Time of Flight 11 companies make Optical Sensors, Time of Flight. Click on a listing for more information or filter your list by ...
Photonics Europe - Program - Conferences - SPIE Web
Zero-crossing detection algorithm for arrays of optical spatial filtering velocimetry sensors.  . Paper 7003A-30 Time: 15:00 - 15:20. Author(s): Michael L. Jakobsen, Steen G. Hanson, Danmarks Tekniske ...
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Long Range Lasers w/ Optical Protection

Long Range Lasers w/ Optical Protection
Balluff, Inc.


Mini Photoelectric BOS 5K Sensors

Mini Photoelectric BOS 5K Sensors
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microV™ Velocimeter

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