Four-Lens Optical System Aberration Correction
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Solution Overview
Problem
Traditional optical image capturing systems for portable electronic devices face challenges in achieving high imaging quality with large apertures, which result in aberrations, and wide view angles, leading to distorted images and manufacturing difficulties, while also requiring increased light and view angle capabilities.
Innovation Solution
The use of a four-piece optical image capturing system with specific refractive powers, convex and concave surfaces, and inflection points in the lens elements to enhance light intake and view angle, correcting aberrations and improving imaging quality, suitable for miniaturized electronic products.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a large aperture design is used to increase light intake, then the quantity of incoming light is improved, but aberration increases resulting in deterioration of image quality
Solution Approach 1:
The optical system is divided into four separate lens elements with specific refractive powers and surface curvatures. Each lens element contributes to correcting specific types of aberrations, allowing the system to maintain large aperture for light intake while distributing the correction function across multiple components rather than relying on a single element
Solution Approach 2:
Different lens elements have different refractive powers and surface characteristics optimized for their specific positions in the optical path. The first lens element has positive refractive power with specific convex/concave surface configurations, while subsequent elements have different configurations tailored to correct specific aberrations at different stages of light propagation
2Adaptability or versatility
If a wide view angle design is used to increase field of view, then the view angle is improved, but distortion rate increases resulting in deterioration of image quality
Solution Approach 1:
The wide view angle requirement is addressed by distributing the angular coverage function across four lens elements. Each element handles a portion of the angular field, with their combined effect achieving wide view angle while maintaining image quality through progressive correction of distortion at different field positions
Solution Approach 2:
The lens elements employ specific convex and concave surface curvatures with defined radii of curvature. These curved surfaces are designed to redirect light rays from wide angles while compensating for distortion, using precise geometric configurations to maintain image fidelity across the expanded field of view
3Manufacturing precision
If high pixels are implemented to improve imaging quality, then imaging quality is improved, but the requirement for large aperture and wide view angle creates manufacturing difficulties
Solution Approach 1:
The system uses four separate lens elements that can be manufactured and tested individually before assembly. This segmentation allows for specialized manufacturing processes for each element based on their specific refractive power requirements, while the modular nature simplifies quality control and assembly compared to a single complex high-pixel lens
Solution Approach 2:
The patent specifies particular parameter ranges for each lens element including refractive power, radius of curvature, and thickness. By defining these parameters within specific ranges, the design balances imaging quality requirements with manufacturability, allowing standard manufacturing tolerances to achieve the desired high pixel quality without excessive difficulty
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 system effectively increases light intake and view angle, enhancing imaging quality and pixel density, while maintaining a compact design, thereby addressing the limitations of traditional systems.
Implementation Method 1
an order from an object side to an image side, includes a first, second, third and fourth lens elements with refractive power
Data Source
AI summary
A four-piece optical lens for capturing image and a five-piece optical module for capturing image are provided. In the order from an object side to an image side, the optical lens along the optical axis includes a first lens with positive refractive power; a second lens with refractive power; a third lens with refractive power; and a fourth lens with refractive power; and at least one of the image-side surface and object-side surface of each of the four lens elements are aspheric. The optical lens can increase aperture value and improve the imaging quality for use in compact cameras.