Scatterer-Based Focusing Device for Coma Aberration Correction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing focusing devices for mobile and IoT devices face challenges in reducing thickness due to the need to combine multiple optical lenses to correct coma aberration, limiting their size reduction and field of view.
Innovation Solution
A focusing device comprising a substrate with a first thin lens and a second thin lens, each with scatterers that correct geometric aberrations, allowing light to focus on a focal plane regardless of incident angle, and featuring a phase shift that adjusts focus location based on incident angle, using materials with refractive indexes greater than the substrate and designed scatterer shapes and heights optimized for wavelength bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple optical lenses are combined to correct coma aberration, then coma aberration is removed, but device thickness increases
Solution Approach 1:
The patent combines multiple lens functions into a single integrated lens structure. The first lens and second lens are merged into one component with different refractive index regions, eliminating the need for separate physical lenses while maintaining coma aberration correction capability.
Solution Approach 2:
The patent uses composite material structures with different refractive indices within the same lens. The lens includes a first region with a first refractive index and a second region with a second refractive index, allowing multiple optical functions to be achieved within a single homogeneous component.
2Reliability
If multiple optical lenses are combined to correct coma aberration, then coma aberration is removed, but device size increases
Solution Approach 1:
The patent merges multiple lens functions into a single integrated lens structure, reducing the overall device volume by eliminating the space required for separate lenses and their mounting structures.
Solution Approach 2:
The patent introduces refractive index variation as an additional degree of freedom within the lens structure. By controlling refractive index distribution in different regions rather than using multiple separate components, the patent achieves compact design with reduced volume.
3Volume of moving object
If a single lens is used, then device size is reduced, but coma aberration occurs
Solution Approach 1:
The patent applies different optical properties to different regions of the same lens. The first region has a first refractive index optimized for certain light paths, while the second region has a second refractive index optimized for other light paths, allowing coma aberration correction within a single lens structure.
Solution Approach 2:
The lens is constructed with composite material regions having different refractive indices. This allows the single lens to perform multiple optical functions simultaneously, including coma aberration correction, while maintaining a compact form factor.
4Adaptability or versatility
If the field of view is expanded, then light incident at various angles is captured, but coma aberration increases
Solution Approach 1:
The patent optimizes different regions of the lens for different incident angles. The refractive index distribution is designed such that light rays at various angles are properly focused, expanding the field of view while correcting coma aberration for each angular range.
Solution Approach 2:
The patent varies the refractive index parameter across different regions of the lens to optimize performance for different incident angles. This parameter optimization allows wide field of view coverage while maintaining image quality and correcting aberrations.
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
The solution enables a compact focusing device with a wide field of view, effectively correcting coma aberration and allowing light to focus accurately across various angles and wavelengths, enhancing image quality and reducing device size.
Implementation Method 1
Respective refractive indexes of the first and second scatterers may be greater than a refractive index of the substrate
Data Source
AI summary
Provided is a focusing device that includes a substrate and a plurality of scatterers provided at both sides of the substrate. The scatterers on the both sides of the focusing device may correct geometric aberration, and thus, a field of view (FOV) of the focusing device may be widened.