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Laser rangefinder Laser rangefinder

Laser rangefinder

 

A laser rangefinder is a rangefinder which uses a laser beam to determine the distance to an object. The most common methode of the distant measurement is time of flight principle by measuring the time from sending a laser pulse towards the object and to returning back to the sender.

Pulsed laser diodes and detectors (PIN-PD, APD, MPPC) from Hamamatsu have been in use in the Laser rangefinder.

 

Parameter MPPC® APD PIN photodiode
Range Long Middle Short
Accuracy High High High
Readout circuit Simple Complex Complex
Operation voltage to several tens of V 100 to 200 V to 10 V
Gain 105 10 to 100 1
Temperature sensitivity Middle High Low
Response time Fast Medium Medium
Ambient light immunity Medium Medium High
Array Suitable Suitable Suitable
Gap Narrow Wide Wide
Uniformity Good Depends on the size Good

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