Three-Lens Optical System Aberration Correction via Segmentation
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Solution Overview
Problem
Conventional optical systems in 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 being difficult to manufacture and miniaturize.
Innovation Solution
The optical image capturing system employs a combination of refractive powers and specific geometrical shapes of three-piece optical lenses with engaging components to increase light intake, widen the view angle, and improve pixel density, using parameters like refractive indices, lens thicknesses, and surface profiles to correct aberrations and optimize manufacturing precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the optical system uses a large aperture to increase light intake, then the imaging quality in dark environments is improved, but aberrations increase causing poor imaging quality at peripheral portions
Solution Approach 1:
The optical system divides the light path into multiple segments by using three lens elements (first lens, second lens, third lens) with different refractive powers and shapes. Each lens segment handles specific portions of the light cone, allowing the system to achieve large aperture while controlling aberrations through distributed optical correction.
Solution Approach 2:
Different regions of the optical system are optimized with different lens characteristics. The first lens has positive refractive power with specific curvature, the second lens has negative refractive power to correct aberrations, and the third lens has positive refractive power to finalize the imaging quality. This local optimization allows large aperture while maintaining imaging quality.
2Area of stationary object
If the optical system uses a wide view angle to satisfy selfie requirements, then the coverage area is improved, but distortion increases while imaging
Solution Approach 1:
The wide view angle is segmented across three lens elements, each contributing to the overall field of view while maintaining control over distortion. The first lens captures the wide angle, the second lens corrects distortion, and the third lens refines the imaging quality, enabling wide view without excessive distortion.
Solution Approach 2:
The system changes optical parameters including refractive indices, lens curvatures, and spacing between lenses to optimize the balance between view angle and distortion. By adjusting these parameters, the system achieves wide view angle while maintaining acceptable imaging quality.
3Volume of moving object
If the optical system is miniaturized for portable devices, then the device size is reduced, but the difficulty of manufacturing increases
Solution Approach 1:
The patent combines multiple optical functions into a compact three-lens system. The first, second, and third lenses are arranged in close proximity with specific spacing, merging the functions of light gathering, aberration correction, and imaging quality optimization into a miniaturized package that is still manufacturable.
Solution Approach 2:
The system uses specific parameter values for lens curvatures, refractive indices, and spacing that balance miniaturization with manufacturability. The curvature values and material properties are selected to achieve compact size while remaining compatible with standard manufacturing processes.
4Measurement precision
If the optical system increases pixel density to provide higher image quality, then the imaging resolution is improved, but the requirement for miniaturization becomes more stringent
Solution Approach 1:
The optical system segments the light path across three lens elements to achieve high pixel density without requiring a larger system. Each lens contributes to focusing light onto a compact sensor array, enabling high pixel density while maintaining a miniaturized overall 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 solution enhances imaging quality, corrects aberrations, and allows for the miniaturization of optical systems while maintaining high performance, suitable for compact electronic devices with improved light intake and pixel density.
Implementation Method 1
The optical image capturing system includes a first lens, a second lens, and a third lens from an object side to an image side... Each lens has refractive power... to increase the amount of incoming light... to widen the view angle... to improve the total pixels contained in an image and the imaging quality
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.