Metalens Metasurface Regions for Lower Analysis Load
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The design and evaluation of metamaterial-based optical elements for image display devices, particularly metalenses, face significant challenges due to the high calculation load and time required for evaluating the actual dimensions and arrangement of microstructures, especially when dealing with visible light, which necessitates a more accurate manufacturing technique.
Innovation Solution
A wavefront control element comprising an array of metasurface regions, each with a lens function, is designed to control the wavefront of incident light, utilizing a reduced calculation approach by arranging metasurface regions in a symmetrical pattern to reduce the electromagnetic wave analysis load and time, allowing for practical implementation of a cm-order lens.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If electromagnetic wave analysis (FDTD method) is used to evaluate the actual dimensions and arrangement of microstructures in a metalens, then the design accuracy and optical performance can be ensured, but the calculation load and calculation time increase enormously
Solution Approach 1:
The patent divides the entire metalens surface into multiple independent metasurface regions arranged in an array. Each metasurface region can be evaluated separately using electromagnetic wave analysis, rather than analyzing the entire cm-order lens at once. This segmentation reduces the calculation load and time while maintaining design evaluation accuracy for each region.
2Area of stationary object
If the area of the base material surface is increased to create a cm-order lens, then the lens functionality for projectors is achieved, but the calculation load for design evaluation increases enormously
Solution Approach 1:
The large-area metalens is segmented into multiple smaller metasurface regions that can be independently designed and evaluated. This allows the total lens area to be large enough for projector applications while each individual region remains small enough for manageable computational analysis.
Solution Approach 2:
Multiple metasurface regions are combined to form the complete cm-order metalens. Each region contributes to the overall optical function, and their combined effect achieves the desired lens performance for projector applications without requiring analysis of the entire large area at once.
3Productivity
If machine learning is introduced to reduce calculation time for metalens design, then the calculation speed may be improved, but there is no practical use currently
Solution Approach 1:
By segmenting the design into manageable metasurface regions, traditional electromagnetic wave analysis becomes practically implementable without requiring unproven machine learning approaches. This makes the methodology immediately practical for manufacturing while still achieving reasonable calculation times.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach significantly reduces the calculation load and time required for designing and evaluating the dimensions of the metasurface regions, enabling the practical implementation of a cm-order lens for projectors without the need for extensive computational resources.
Implementation Method 1
each of the plurality of metasurface regions has a lens function. Each of the plurality of metasurface regions converges or diverges the incident light
Data Source
AI summary
A metalens (wavefront control element) according to the present disclosure is a wavefront control element that controls a wavefront of incident light, and includes a plurality of metasurface regions. The plurality of metasurface regions are arranged in an array.