Micro moving scanning optical system of bionic field of view
To meet the requirements for a wide field of view in vehicle-mounted LiDAR systems,a beam scanning system based on micro-motion non-uniform array microlenses has been designed.This system adopts a biomimetic field of view design and incorporates a scanning structure of microlenses and refractive prisms to effectively segment and stitch the wide field of view.By designing the spatial distribution of the microlenses and refractive prisms,a seamless connec-tion of the field of view is achieved.The deflection of the beam is accomplished by the slight displacement of the micro-lenses and refractive prisms driven by piezoelectric ceramics,completing the scanning of the optical system over a wide field of view.The working wavelength of the scanning optical system is 905nm,and when the displacement of the piezoe-lectric ceramics is 200pm,the horizontal field of view is 112.5°,and the vertical field of view is 25°.The root-mean-square(RMS)radius of the exit beam is less than 0.277°,and in areas of high resolution,the RMS radius is less than 0.081°.This solution offers the advantages of compact size,large scanning field of view,and high central resolution,providing a reference for the miniaturization of vehicle-mounted LiDAR scanning systems.
applied opticsscanning optical systembiomimetic field of viewarray microlens
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