Optical Lens Phase Delay Structures for Full-Color Imaging Resolution
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Solution Overview
Problem
Conventional metalens technology faces challenges in achieving high resolution for full-color light imaging, as the same microstructure array struggles to clearly image different wave bands simultaneously.
Innovation Solution
The optical lens employs multiple circular phase delay structures with varying microstructure distances in a radial direction, allowing for distinct phase delays for different color lights, enabling clear imaging of each color band.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If the same microstructure array is used to refract full-color light, then the lens thickness is greatly reduced, but the resolution for different color lights deteriorates
Solution Approach 1:
The patent divides the single microstructure array into multiple distinct phase delay structures, each optimized for specific wavelength ranges. This segmentation allows different color lights to be refracted by appropriate structures, achieving both thin lens design and high resolution for multiple wavelengths simultaneously.
Solution Approach 2:
Different regions of the lens substrate are assigned different phase delay structures with specific microstructure arrangements tailored to their local wavelength requirements. This local quality approach enables each region to optimize imaging performance for its designated color band while maintaining overall lens compactness.
2Device complexity
If the same phase delay structure is used for all color lights, then the device complexity is reduced, but the imaging quality for different colors deteriorates
Solution Approach 1:
The patent segments the phase delay function across multiple structures, with each structure handling specific wavelength ranges. This segmentation improves imaging quality for different colors while keeping the overall device design systematic and manageable through modular arrangement.
Solution Approach 2:
The patent varies key parameters of the phase delay structures, particularly the distance between adjacent microstructures in radial direction, to optimize performance for different wavelength ranges. These parameter changes enable clear imaging of multiple colors without requiring completely different structural designs.
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 allows for appropriate phase delays for each color light, resulting in clear imaging and improved resolution, effectively addressing the limitations of conventional metalens technology.
Implementation Method 1
Each of the phase delay structures is circular, and includes a center of circle and multiple microstructures. Distances D between the two adjacent microstructures of each of the phase delay structures in a radial direction of the center of circle are the same, and at least two of the phase delay structures among the phase delay structures have the different distances D.
Implementation Method 2
different phase delay structures are used to refract different color lights (wave bands). Compared to the conventional technology where the same phase delay structure is used to refract different color lights, each of the color lights in the embodiment of the disclosure may have appropriate phase delay respectively
Data Source
AI summary
An optical lens is provided, including a substrate and multiple phase delay structures. The phase delay structures are disposed on the substrate in an array. Each of the phase delay structures is circular, and includes a center of circle and multiple microstructures. Distances D between the two adjacent microstructures of each of the phase delay structures in a radial direction of the center of circle are the same, and at least two of the phase delay structures among the phase delay structures have the different distances D.