Abstract
A laser radar system, direct-detection three-dimensional imaging laser radar using a Geiger-mode avalanche photodiode (APD) is introduced in this paper. The system consists of a passively Q-switched microchip laser as a light source, a Geiger-mode APD as a detector, a time-to-digital converter (TDC) as a signal processor, and a customized algorithm for three-dimensional visualization. Due to the extremely high sensitivity of the detector, the system has the ability to detect a target that is obstructed by a sparse obstacle. The combination of both the detector having short dead time and the TDC having a multi-stop function enables the system to operate in a single- or a multi-hit mode during the acquisition of time-of-flight data. It has been shown experimentally that the multi-hit mode is more efficient in detecting the objects behind a sparse obstacle than the single-hit mode.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
