Area Array Push-broom Photon Counting 3D Imaging System Based on Pixel Multiplexing

Abstract

The invention provides an area array push-broom photon counting three-dimensional imaging system based on pixel multiplexing, which aims to improve the imaging capability of the existing photon counting radar system under motion conditions. The invention obtains the target distance image by superimposing the measurement data of different pixels on the same target point, and then carries out the optimal estimation of the target distance value, thereby improving the three-dimensional imaging quality of the photon counting radar system under the motion condition.

Description

technical field [0001] The invention relates to the field of photon counting laser radar, in particular to an area array push-broom photon counting three-dimensional imaging system based on pixel multiplexing. Background technique [0002] In recent years, photon counting lidar technology based on single-photon detection has gradually become the development trend of a new generation of lidar due to its advantages of high detection sensitivity, high time resolution, and lightweight system. Due to the limitation of semiconductor technology, it is currently impossible to obtain a large area array photon counting detector with a timing function for each pixel. Most photon counting lidar systems still use the time-consuming unit scanning or multi-element linear scanning method to obtain the 3D image of the target. . Since a single detection by a photon-counting radar can usually only distinguish the presence or absence of a photon detection event but not signal and noise photons...

AI Technical Summary

Problems solved by technology

Due to the limitation of semiconductor technology, it is currently impossible to obtain a large area array photon counting detector with a timing function for each pixel. Most photon counting lidar systems still use time-consuming unit scanning or multi-line array scanning to acquire target 3D images

Since a single detection of photon counting radar can usually only distinguish between photon detection events and cannot distinguish signal and noise photons, multiple detections need to be accumulated per pixel in order to extract the signal

Therefore, under moving conditions, the imaging quality of photon counting radar is generally poor. When it works on a moving platform with a fast moving speed, such as a satellite or an aircraft platform, the three-dimensional imaging quality of the radar system will be seriously reduced

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