Three-dimensional imaging photon counting system using N-fold pulse coding and counting method

Abstract

The present invention relates to a three-dimensional imaging photon counting system using N-fold pulse coding and a counting method. The system includes a total controller, a signal generator, a pulselaser, a transmission optical system, a receiving optical system, a Gm-APD array detector, and a TCSPC (time-correlated single photon counter) and a signal processing unit. According to the method ofthe present invention, the total controller controls the signal generator to generate N-fold pulse signals; the N-fold pulse signals are converted into pulse optical signals through the pulsed laser;thee pulse optical signals hit a target object through the transmission optical system; the energy of echo pulse signals reflected by the target object is collected by the receiving optical system; the echo pulse signals irradiate the Gm-APD array detector; signals generated by the detector pass through the TCSPC (time-correlated single photon counter); counted signals are transmitted to the signal processing unit for time correlation and solution; and a counting result is transmitted to the total control module, and the total control module outputs a result. With the counting method of the invention adopted, the problems of strength information loss and incapability of resisting environmental interference in the prior art can be solved.

Description

technical field [0001] The invention relates to the technical field of laser radar, in particular to a three-dimensional imaging photon counting system and counting method using N-fold pulse coding. Background technique [0002] Optical 3D imaging technology has a wide range of applications in terrain mapping, navigation, unmanned driving, medical treatment and other fields. There are currently two main implementation methods: [0003] One is the three-dimensional synthesis method, that is, the planar image of the target is passively acquired by CCD and other photosensitive devices, and the three-dimensional image of the measured target is obtained through three-dimensional reconstruction in the later stage by obtaining different dimensional information of the same target at different azimuth coordinates; [0004] The other is the pulsed laser active detection method, that is, the pulsed laser is used to perform laser ranging detection on different parts of the target objec...

AI Technical Summary

Problems solved by technology

[0011] In order to solve the problems of intensity information loss and inability to resist environmental interference existing in the existing photon counting three-dimensional imaging technology, the present invention provides a three-dimensional imaging photon counting system and counting method using N-fold pulse coding

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