Scanning three-dimensional imaging pulsed laser radar System and Method using dual Geiger-mode avalanche photodiodes

摘要

The invention of the scanning operation Geiger-mode avalanche photodiode dual three-dimensional imaging and pulsed laser radar systems relates to a method, and more specifically to a target irradiated with a laser pulse beam having a pulse width of less than several tens of nanoseconds, and is scattered therefrom eobael Geiger mode through the optical system to return a portion of light lunch photodiode (GmAPD: Geiger-mode Avalanche By detecting a PhotoDiode) to measure the TOF (Time-Of-Flight) is the TOF of the laser pulse beam is sent into a TDC (Time-to-Digital Converter) signal processing system through a converter is converted into the distance information, it is for a three-dimensional imaging pulse scanning laser radar system and a method for operating a dual Geiger mode avalanche photodiode is to obtain a three-dimensional image through. According to the invention, the 3-D by two, the same light energy to the beam splitter located in the GmAPD signal detecting pulse laser imaging radar system of connecting the signals from the two GmAPD to be delivered to each of the AND gates GmAPD, false alarms the probability (false-alarm probability) can be drastically reduced. ;