Six-Element Camera Lens Design for Miniaturization and Aberration Correction
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Solution Overview
Problem
There is a need for ultra-thin wide-angle camera lenses with good optical characteristics and fully corrected chromatic aberration, as existing miniature camera lenses struggle to maintain imaging quality due to shrinking pixel sizes and increasing demands for thinner and more compact designs.
Innovation Solution
A six-piece camera optical lens design is proposed, comprising lenses made of different materials (plastic and glass) with specific refractive powers, focal lengths, and thickness ratios, optimized to minimize total optical length while correcting aberrations and maintaining high performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the lens structure is reduced to three-piece or four-piece for miniaturization, then the device size is reduced, but the imaging quality deteriorates
Solution Approach 1:
The patent applies parameter changes by carefully controlling the refractive indices (n1, n2, n3, n4) and Abbe numbers (v1, v2, v3, v4) of each lens element, along with specific thickness ratios (d1/TTL, d2/TTL, d3/TTL, d4/TTL) and curvature radius ratios, to achieve optimal optical performance in a compact five-piece lens structure
Solution Approach 2:
The patent uses composite materials by combining different types of lens materials with specific optical properties - including plastic and glass materials with different refractive indices and dispersion characteristics - to correct chromatic aberrations and improve overall imaging quality while maintaining a compact form factor
2Manufacturing precision
If more lens pieces (five-piece, six-piece, seven-piece) are used to improve imaging quality, then the imaging quality is improved, but the device thickness increases
Solution Approach 1:
The patent employs parameter changes by establishing specific mathematical relationships between lens parameters - including refractive indices, Abbe numbers, thickness ratios, and curvature radius ratios - to optimize the five-piece lens design for both compactness and high imaging quality, achieving ultra-thin profile while correcting various aberrations
Solution Approach 2:
The patent applies local quality by assigning different material properties and optical characteristics to each specific lens element (L1, L2, L3, L4, L5) based on their position and function in the optical system, with each element having specifically tailored refractive index, Abbe number, and shape parameters to address local optical requirements
3Volume of moving object
If the pixel size is reduced for miniaturization, then the device is more compact, but the chromatic aberration correction becomes more difficult
Solution Approach 1:
The patent uses composite materials with different dispersion characteristics - combining lens elements with high refractive index and low Abbe number with elements with low refractive index and high Abbe number - to effectively correct chromatic aberrations at the reduced pixel sizes typical of modern smartphone cameras
Solution Approach 2:
The patent applies parameter changes by carefully selecting and optimizing the refractive indices and Abbe numbers of each lens element, along with their thicknesses and curvatures, to achieve effective chromatic aberration correction across the visible spectrum despite the small pixel dimensions
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 ultra-thin and wide-angle capabilities with fully corrected on-axis and off-axis chromatic aberrations, ensuring excellent optical characteristics and miniaturization of camera lenses.
Implementation Method 1
a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, and a fifth lens L5, from the object side to the image side respectively. The first lens L1 has a positive refractive power, the second lens L2 has a negative refractive power, the third lens L3 has a negative refractive power, the fourth lens L4 has a positive refractive power, and the fifth lens L5 has a positive refractive power
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 having a negative refractive power, a third lens having a negative refractive power, a fourth lens, a fifth lens, and a sixth lens. The first lens is made of plastic material, the second lens is made of plastic material, the third lens is made of glass material, the fourth lens is made of plastic material, the fifth lens is made of plastic material, and the sixth lens is made of plastic material. The camera optical lens further satisfies specific conditions.