7-Element Camera Lens Design for Wide-Angle Imaging
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
There is a need for ultra-thin wide-angle camera lenses with good optical characteristics and fully corrected chromatic aberration, particularly for handheld devices like smartphones and digital cameras, where the shrinking pixel size of photosensitive devices and increasing demand for better imaging quality require more complex lens structures.
Innovation Solution
A 7-piece camera optical lens design is proposed, with specific conditions for the focal lengths, refractive powers, and curvature radii of each lens element, optimized to achieve ultra-thin and wide-angle performance while minimizing chromatic aberration, using a combination of plastic and glass materials to control refractive power and shape.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a three-piece or four-piece lens structure is used, then the device is simpler and easier to manufacture, but the imaging quality is insufficient for shrinking pixel sizes
Solution Approach 1:
The lens system is divided into 7 distinct lens elements with specific optical powers, where each element contributes to correcting specific aberrations. The segmentation allows complex optical functions to be distributed across multiple simpler components, achieving high imaging quality while maintaining manufacturability through standardized element designs.
Solution Approach 2:
The patent employs composite lens structures combining different materials with specific refractive indices and Abbe numbers. Elements use materials with varying optical properties to correct chromatic and spherical aberrations, achieving superior imaging quality through material composition rather than single-material designs.
2Manufacturing precision
If more lens elements are added to improve imaging quality, then chromatic aberration correction improves, but the total optical length increases
Solution Approach 1:
The patent optimizes key parameters including the optical power distribution across elements, the ratio of specific element powers, and the positioning of elements within the optical path. By carefully controlling parameters like the ratio of the optical power of the fourth element to the fifth element, the design achieves effective chromatic aberration correction while constraining the total optical length within 5.0mm to 7.0mm.
Solution Approach 2:
Each lens element is designed with specific local optical properties including particular refractive indices, Abbe numbers, and surface curvatures tailored to correct specific aberrations at different positions in the optical path. This localized optimization allows efficient correction of chromatic aberration without requiring uniform increases in all dimensional parameters.
3Adaptability or versatility
If the lens is designed for wide-angle imaging, then the field of view increases, but optical aberrations become more difficult to correct
Solution Approach 1:
The wide-angle optical path is divided into 7 sequential lens elements, each responsible for specific aberration correction tasks. This segmentation allows the complex wide-angle aberrations to be broken down and corrected incrementally through each element, making the overall correction more manageable and effective than a single-element approach.
Solution Approach 2:
The patent uses composite material design with elements having different refractive indices and dispersion properties to correct the increased aberrations associated with wide-angle imaging. The varied material properties across elements enable effective correction of off-axis aberrations and chromatic effects that are more pronounced in wide-angle designs.
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 design achieves high-performance imaging with reduced total optical length, maintaining miniaturization characteristics and effectively correcting on-axis and off-axis chromatic aberrations, resulting in excellent optical characteristics and wide-angle capabilities.
Implementation Method 1
a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6 and a seventh lens L7 arranged from the object side to the image side in sequence
Data Source
AI summary
The present disclosure discloses a camera optical lens. The camera optical lens including, in an order from an object side to an image side, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens. The camera optical lens further satisfies specific conditions.