A scattered point redistribution ranging device and laser detection system

Abstract

The invention discloses a scattered point redistribution ranging device and a laser detection system. Wherein, the scatter-point redistribution ranging device includes an optical collector array, a calibration module, a TDC array, an identification module, and a DSP module. The optical collector array is connected to the DSP module through the TDC array and the identification module, and the optical collector array receives the target The scatter spots reflected by the object obtain two-dimensional imaging, and the calibration module obtains the distribution information of all scatter spots in the light collector array according to the two-dimensional imaging, and configures the distribution information into the light collector array, and then the TDC The array receives the photon-triggered time signal and the distribution information output by the light collector array, is identified by the identification module and sent to the corresponding DSP module for histogram statistics, and calculates the distance of the target object. There is no need to do calibration in the end. For different sizes of light spots and different systems, the module construction will be the same, which is very conducive to the mass production of modules.

Description

technical field [0001] The invention relates to the technical field of light detection, in particular to a scatter-point redistribution ranging device and a laser detection system. Background technique [0002] Depth image sensors can detect the distance of objects and are widely used in AR / VR, 3D modeling, face recognition, unmanned driving, intelligent robots and other fields. The depth measurement system based on photon time-of-flight usually includes a laser transmitter, a collector and a related control unit. The laser signal emitted by the transmitter is reflected by the detected object, and the collector performs signal processing on the reflected optical signal, and calculates The time difference between the time of laser emission and the time of reception is used to obtain the actual distance of the object. [0003] Single-photon avalanche diodes (SPADs) have fast speed and high photoelectric efficiency, and can be fabricated in CMOS technology, so they are widely ...

AI Technical Summary

Problems solved by technology

The existing technology must be calibrated after calibration, that is, the light spot is moved to the designated SPAD sub-array, and the requirements for optical calibration are very strict, and when multiple light spots need to be calibrated one by one, the calibration process is cumbersome and inefficient. For different The size of the light spot, different systems, are different for optical calibration, and the modules will be different every time they are built, which is not conducive to the mass production of modules

Images