Area array push-broom photon counting three-dimensional 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, and aims to improve the imaging capability of an existing photon countingradar system under a motion condition. According to the invention, the measurement data of different pixels for the same target point are superposed, and then the target distance value is optimized and estimated to obtain a target distance image, so that the three-dimensional imaging quality of the photon counting radar system under the motion condition is improved.

Description

Technical field [0001] The invention relates to the field of photon counting lidar, in particular to an area array push-broom type 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 system lightweight. Due to the limitation of semiconductor technology, it is currently impossible to obtain large area photon counting detectors with timing functions for each pixel. Most photon counting lidar systems still use the time-consuming unit scan or multi-line array scan method to obtain three-dimensional images of the target. . Since the single detection of photon counting radar can usually only distinguish whether there is a photon detection event but cannot distinguish between 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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