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CN-122018056-A - Particle swarm optimization algorithm-based stretchable super-structured lens with adjustable focus and high focusing efficiency in infrared band

CN122018056ACN 122018056 ACN122018056 ACN 122018056ACN-122018056-A

Abstract

A stretchable super-structure lens with adjustable focus and high focusing efficiency in infrared band based on particle swarm optimization algorithm. The stretchable super-structure lens is composed of periodic structures, each of which includes a substrate (1), and a plurality of super-structure lens basic unit structures (2) are stacked on the substrate (1). The substrate (1) is composed of a stretchable material PDMS, and the super-structure lens basic unit structure (2) is composed of a GaN material. The invention has simple structure, simple preparation process and low material cost, the super-structure lens can realize the stretching effect of the period from 450nm to 650nm within 780-880 n wave bands, and the obtained focal lengths are respectively 50.38 mu m, 69.05 mu m, 88.45 mu m, 107.34 mu m and 130.03 mu m, so that the expected target focal length can be well reached. The focusing efficiency of the super-structure lens can reach more than 60 percent in 780-880 nm wave bands, compared with the prior stretchable super-structure lens, the stretchable super-structure lens with adjustable focus provides an effective method for the application of a stretchable device, and provides new directions for the design of future super-structure lenses, such as the application in the next generation of three-dimensional stereo imaging and holographic projection and astronomical telescope systems.

Inventors

  • YANG HONGYAN
  • XIE ZIXUAN
  • ZHUO YANSHENG
  • CHEN WEIJIE
  • SHEN CHAO

Assignees

  • 南宁桂电电子科技研究院有限公司
  • 桂林电子科技大学

Dates

Publication Date
20260512
Application Date
20260313

Claims (7)

  1. 1. A stretchable super-structure lens with adjustable focus and high focusing efficiency in infrared band based on particle swarm optimization algorithm. The stretchable super-structure lens with the adjustable focus with the high focusing efficiency is characterized by comprising a substrate (1), wherein the super-structure lens with the adjustable focus of an infrared band formed by a plurality of super-structure lens structure units (2) is arranged on the substrate (1), and the super-structure lens structure units (2) are of a cube structure.
  2. 2. The high focusing efficiency stretchable super-structured lens based on the particle swarm optimization algorithm according to claim 1, wherein the super-structured lens is a complex array of structural units (2).
  3. 3. The high focusing efficiency stretchable super-structured lens based on particle swarm optimization algorithm according to any of claims 1-2, wherein the super-structured lens structure unit (2) has a height h= 1.5 μm, a length L ranging from 0.05 μm to 0.25 μm, and a width W ranging from 0.05 μm to 0.25 μm.
  4. 4. A stretchable super-structured lens with adjustable focus and high focusing efficiency in infrared band based on particle swarm optimization algorithm according to any of claims 1-2, wherein the period of the substrate (1) is in the range of 0.45 μm-0.65 μm.
  5. 5. The stretchable super-structured lens with the adjustable focus and high focusing efficiency in the infrared band based on the particle swarm optimization algorithm is characterized in that the substrate (1) is made of PDMS, and the super-structured lens structural unit (2) is made of GaN.
  6. 6. The method for designing a focus-adjustable stretchable super-structure lens with high focusing efficiency in infrared band based on particle swarm optimization algorithm according to claim 1, wherein after selecting super-structure lens material and selecting super-structure lens basic unit structure, the super-structure lens basic unit can be simulated and optimized to its performance parameters by finite difference time domain method, and the phase delay can be satisfied to 2 in the structural unit The super-structure lens structure unit is constructed according to a wave front reconstruction equation. After the super-structure lens structure units are built, the positions and the sizes of the super-structure lens structure units (2) are calculated according to a particle swarm optimization algorithm, and then the whole super-structure lens is built according to the phase and the sizes of each obtained super-structure lens structure.
  7. 7. The particle swarm optimization algorithm-based stretchable super-structured lens with high focusing efficiency and adjustable focus in infrared band is characterized in that the super-structured lens achieves a stretchable effect with a period ranging from 450nm to 650nm in 780nm-880n bands, and the obtained focal lengths are 50.38 μm, 69.05 μm, 88.45 μm, 107.34 μm and 130.03 μm respectively, so that the expected target focal length can be well achieved. The focusing efficiency of the super-structured lens can reach more than 60% within the wave band of 780nm-880nm, and the super-structured lens has a great progress space compared with the prior stretchable super-structured lens. The focus-adjustable stretchable super-structured lens provides an effective method for the application of stretchable devices and provides a new direction for the design of future super-structured lenses, such as the application in the next generation of three-dimensional stereoscopic imaging and holographic projection and astronomical telescope systems.

Description

Particle swarm optimization algorithm-based stretchable super-structured lens with adjustable focus and high focusing efficiency in infrared band Technical Field The invention belongs to the technical field of stretchable super-constructed lenses with adjustable focuses, and particularly relates to a stretchable super-constructed lens with adjustable focuses and high focusing efficiency in an infrared band based on a particle swarm optimization algorithm and a design method thereof. Background Conventional lenses are used for cameras, microscopes, telescopes, etc., and are made of glass or other transparent plastic materials. They have a curved surface and a fixed focal length. Cameras commonly used in daily life are composed of many lenses to solve the problems of chromatic dispersion or aberration and to realize power supply of zooming, so that in order to obtain good imaging quality, etc., conventional imaging systems are inevitably bulky, heavy and inefficient. With the gradual development of the super surface, we gradually have a more powerful phase regulation mode, and by changing the shape and size of the structure designed on the substrate, the amplitude, phase and polarization degree of the light beam can be regulated. With the discovery and verification of the function of PDMS, we can gradually realize the corresponding focus-adjustable function by stretching PDMS. By corresponding technology, we design a stretchable super-structured lens with adjustable focus and high focusing efficiency in the infrared band Based on the regulation and control of the super surface to the phase and the stretchable function of PDMS, the invention designs the stretchable super-structured lens with adjustable focus of the infrared band high focusing efficiency based on the particle swarm optimization algorithm, the structure comprises a substrate (1), a plurality of super-structured lens basic structural units (2) are stacked on the substrate (1), and the substrate (1) and the basic unit structure (2) are both in a cuboid structure. The super-structure lens has a simple structure, is simple and easy to prepare and is more beneficial to manufacture, the super-structure lens can realize a stretching effect with a period of 450nm to 650nm within 780nm-880n wave bands, and the obtained focal lengths are respectively 50.38 mu m, 69.05 mu m, 88.45 mu m, 107.34 mu m and 130.03 mu m, so that the expected target focal length can be well achieved. The focusing efficiency of the super-structure lens can reach more than 60 percent in 780-880 nm wave bands, compared with the prior stretchable super-structure lens, the stretchable super-structure lens with adjustable focus provides an effective method for the application of a stretchable device, and provides new directions for the design of future super-structure lenses, such as the application in the next generation of three-dimensional stereo imaging and holographic projection and astronomical telescope systems. Disclosure of Invention The invention designs an infrared band high focusing efficiency focus adjustable stretchable super-structure lens based on a particle swarm optimization algorithm and a design method thereof, and the design method and the realization of the super-structure lens provide an effective method for the application of a stretchable device, and provide a new direction for the design of the super-structure lens in the future, such as the application in the next generation three-dimensional imaging and holographic projection and astronomical telescope system. The purpose of the invention is realized in the following way: In order to achieve the purpose, the invention adopts the following technical means to realize the super-structure lens, namely the stretchable super-structure lens with the focus adjustable and high focusing efficiency in the infrared band based on the particle swarm optimization algorithm, wherein the periodic structure comprises a substrate, the substrate is further composed of a plurality of super-structure lens unit structures, and the super-structure lens unit structures are cube structures. Furthermore, the super-structure lens structural units are adopted to form a periodic array. Further, the height of the super-structured lens is H, H=1.5 μm, the length L is in the range of 0.05 μm to 0.25 μm, and the width W is in the range of 0.05 μm to 0.25 μm. Further, the period of the substrate was 0.45 μm, 0.50 μm, 0.55 μm, 0.60 μm, 0.65 μm, respectively, with the stretching effect on the substrate Further, the substrate of the super-structure lens is made of stretchable material PDMS, and the unit structure of the super-structure lens is made of GaN as a corresponding material. Further, the super-structure lens unit structure optimizes the performance parameters of the set unit structure by using the finite difference time domain method after the material is selected, and after the expected performance is achieved (the super-structure lens