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...

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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 th

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