Metalens Array and Spatial Positioning Method Based on Metalens Array
AssigneeNankai University
InventorsShuqi Chen, Wenwei Liu, Dina Ma, Hua Cheng, Jianguo Tian
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Abstract
The present disclosure provides a metalens array and a spatial positioning method based on the metalens array. The metalens array includes at least two metalenses, each of the metalenses comprises a plurality of prism cells, each of the prism cells comprises a silicon dioxide substrate and a titanium oxide prism placed on the silicon dioxide substrate, and the plurality of prism cells are arranged periodically.
Claims20
A metalens array, comprising:
- at least two metalenses, with each of the metalenses comprising a plurality of prism cells and each of the prism cells comprising a silicon dioxide substrate and a titanium oxide prism placed on the silicon dioxide substrate, wherein the plurality of prism cells are arranged periodically.
A spatial positioning method based on a metalens array, the metalens array having at least two metalenses, with each of the metalenses comprising a plurality of prism cells, the plurality of prism cells arranged periodically, the method comprising:
- acquiring an object image of an observed object formed by the metalens array, wherein the object image comprises a plurality of images of the observed object, and one metalens corresponds to one image of the observed object;
- correcting the object image using a genetic algorithm to obtain an corrected object image, wherein to-be-optimized variables of the genetic algorithm comprise:
- a scaling amount of the object image in a horizontal direction, a translational amount of the object image in the horizontal direction, a scaling amount of the object image in a vertical direction, a translational amount of the object image in the vertical direction, and a distortion correction factor of the object image;
- determining, based on the corrected object image, a size of each image of the observed object and an object distance between each two images of the observed object;
- and
- determining a spatial position of the observed object based on the sizes and the object distances of the images of the observed object, and a periodicity of the metalens array.
Dependencies are inferred from the claim text.