Three-Lens Optical System Aberration Correction
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Solution Overview
Problem
Conventional optical systems for portable electronic devices face challenges in achieving high imaging quality due to aberrations and distortion, especially in low-light conditions and wide view angles, while also requiring a compact design with increased pixel density.
Innovation Solution
A compact optical image capturing system utilizing a combination of refractive powers and inflection points on the surfaces of three-piece optical lenses to enhance light intake, widen the view angle, and improve imaging quality, with specific lens parameters optimized for aberration correction and manufacturing feasibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the aperture is increased to allow more light and wider view angle, then the amount of incoming light and view angle are improved, but aberrations increase causing poor imaging quality at peripheral portions
Solution Approach 1:
The optical system is divided into three separate lenses with distinct functions: the first lens captures light and begins focusing, the second lens corrects aberrations generated by the first lens, and the third lens further refines the optical path. This segmentation allows each lens to be optimized for its specific role, enabling large aperture operation while maintaining peripheral imaging quality through coordinated aberration correction.
Solution Approach 2:
The second lens acts as an intermediary element between the first and third lenses, specifically designed to correct aberrations generated by the first lens before the light reaches the third lens and image sensor. This intermediary lens serves as a mediator that resolves the conflict between large aperture operation and peripheral image quality by actively compensating for optical defects.
2Adaptability or versatility
If the aperture is increased to provide wider view angle for selfies, then the view angle is improved, but distortion increases during imaging
Solution Approach 1:
The three-lens configuration divides the optical correction tasks across multiple elements. The second lens specifically targets distortion correction for wide-angle applications, while the third lens进一步优化 the overall optical path. This segmentation enables the system to achieve wide view angles suitable for selfies while maintaining geometric accuracy through distributed aberration correction.
Solution Approach 2:
The patent employs aspheric surfaces on multiple lenses with specifically optimized curvature parameters and conic constants. By carefully controlling the geometric parameters of each lens surface, the system achieves wide field of view while compensating for distortion through precise parameter optimization rather than relying on post-processing correction.
3Manufacturing precision
If more lenses are added to correct aberrations and improve imaging quality, then imaging quality is improved, but the optical system becomes more complex and difficult to manufacture
Solution Approach 1:
Each lens in the three-element system is designed with specific local optical properties tailored to its position and function. The first lens is optimized for light gathering and initial focusing, the second lens for aberration correction, and the third lens for final image formation. This local optimization approach achieves high overall imaging quality while keeping each individual lens relatively simple to manufacture.
Solution Approach 2:
The patent combines different lens materials with complementary optical properties to achieve superior aberration correction. By selecting materials with different refractive indices and dispersion characteristics for the three lenses, the system corrects both spherical and chromatic aberrations more effectively than a single-material system, while maintaining a compact three-element design that avoids excessive complexity.
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, widens the view angle, and enhances imaging quality, meeting the requirements for high pixel density and compactness, while maintaining excellent transverse aberration performance even at 0.7 field of view.
Implementation Method 1
an optical image capturing system includes a first lens, a second lens, and a third lens from an object side to an image side... The first lens has refractive power
Data Source
AI summary
The invention discloses a three-piece optical lens for capturing image and a three-piece optical module for capturing image. In order from an object side to an image side, the optical lens along the optical axis comprises a first lens with positive refractive power; a second lens with refractive power; and a third lens with refractive power; and at least one of the image-side surface and object-side surface of each of the three lens elements are aspheric. The optical lens can increase aperture value and improve the imaging quality for use in compact cameras.