Six-Lens Optical System with Aspheric Surfaces for Aberration Control
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Solution Overview
Problem
Traditional optical image capturing systems in portable electronic devices face challenges in achieving high pixels, improved imaging quality, and miniaturization while maintaining low aberration and distortion, especially with large aperture and wide view angle designs.
Innovation Solution
The optical image capturing system employs a combination of refractive powers and aspheric surfaces in sixth-piece optical lenses to increase light intake and view angle, incorporating specific lens element parameters and inflection points to correct aberrations and enhance imaging quality, with a configuration of five lens elements and an image plane.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If large aperture design is used to increase light intake, then imaging quality and total pixels are improved, but aberration increases resulting in deterioration of peripherical image formation
Solution Approach 1:
The optical system is divided into six lens elements with different refractive powers and aspheric surfaces, where each lens element is optimized to correct specific types of aberrations. The sixth lens element specifically addresses peripherical image formation quality, while earlier elements handle light gathering and central image quality, allowing the system to achieve both large aperture and low aberration simultaneously
Solution Approach 2:
The patent employs aspheric surfaces on multiple lens elements, including the sixth lens element, which changes the surface geometry parameters from traditional spherical to aspheric profiles. This parameter change enables better control of light rays passing through different zones of the lens, reducing aberration while maintaining large aperture capability
2Adaptability or versatility
If wide view angle design is used to increase field of view, then view angle is improved, but distortion rate increases resulting in deterioration of image formation
Solution Approach 1:
The six-lens configuration segments the optical path into distinct functional zones, with the sixth lens element specifically tasked with correcting distortion in the wide view angle regions. This segmentation allows the system to achieve wide field of view while maintaining image formation accuracy across the entire visual field
Solution Approach 2:
The patent utilizes aspheric surfaces with varying curvatures on multiple lens elements, particularly the sixth lens element, to counteract the distortion inherent in wide view angle designs. The non-spherical surfaces reshape the light paths to eliminate barrel or pincushion distortion while preserving the wide field of view
3Volume of moving object
If miniaturization is pursued to reduce device size, then device compactness is improved, but aberration correction becomes more difficult
Solution Approach 1:
By dividing the optical system into six compact lens elements rather than fewer larger elements, the patent achieves miniaturization while distributing aberration correction functions across multiple smaller components. The sixth lens element specifically targets residual aberrations in the compact configuration
Solution Approach 2:
The adoption of aspheric surfaces on the sixth lens element and other elements enables effective aberration correction in a miniaturized system. The aspheric parameters provide additional degrees of freedom to control light paths within the reduced form factor, maintaining image quality despite the smaller overall system size
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 configuration effectively improves imaging quality, reduces aberrations, and miniaturizes the optical system, enabling it to be used in compact electronic devices while maintaining high performance and low distortion.
Implementation Method 1
an optical image capturing system, in order from an object side to an image side, includes a first, second, third, fourth, fifth and sixth lens elements with refractive power and an image plane
Data Source
AI summary
A six-piece optical lens for capturing image and a six-piece optical module for capturing image are provided. In order from an object side to an image side, the optical lenses along the optical axis include a first lens with refractive power, a second lens with refractive power, a third lens with refractive power, a fourth lens with refractive power, a fifth lens with refractive power and a sixth lens with refractive power, and at least one of the image-side surface and object-side surface of each of the six lens elements is aspheric. The optical lens can increase aperture value and improve the imagining quality for use in compact cameras.