7-Element Camera Lens Design for Miniaturization and Aberration Correction
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Solution Overview
Problem
There is a growing demand for ultra-thin wide-angle camera lenses with good optical characteristics and fully corrected chromatic aberration, particularly for handheld devices like smartphones, where the shrinking pixel size of photosensitive devices and increasing imaging quality requirements pose challenges for traditional lens structures.
Innovation Solution
A 7-piece camera optical lens design is proposed, comprising lenses made of different materials (plastic and glass) with specific focal lengths, refractive powers, and curvature radii, optimized to achieve ultra-thin and wide-angle performance while correcting aberrations, with conditions such as 1.00≤f1/f≤1.5 and 1.7≤n2≤2.2 ensuring effective refractive power and shape control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional three-piece or four-piece lens structure is used, then the lens structure is simple, but the imaging quality is insufficient and chromatic aberration cannot be fully corrected
Solution Approach 1:
The lens system is divided into seven separate lens elements with different materials and optical properties. Each lens element (first through seventh lenses) serves specific functions for correcting different types of aberrations, allowing comprehensive correction of chromatic and spherical aberrations while achieving high imaging quality.
Solution Approach 2:
The patent uses composite material construction with at least one glass lens element (second or fifth lens) and multiple plastic lens elements. Different materials with varying refractive indices and dispersion properties are combined to correct chromatic aberration across multiple wavelengths while maintaining optical performance.
2Manufacturing precision
If more lens elements are added to improve imaging quality, then the imaging quality improves, but the total optical length increases and miniaturization is compromised
Solution Approach 1:
The patent optimizes specific parameter ranges including focal length ratios (f1/f between 1.00-1.5), refractive indices (n2 between 1.7-2.2), and curvature radius relationships ((R13+R14)/(R13-R14) between 0.5-10). These parameter constraints enable compact lens element arrangements that achieve high imaging quality with controlled total optical length suitable for miniaturized devices.
Solution Approach 2:
Different lens elements are assigned specific optical functions and material properties tailored to their positions in the optical path. The second lens (glass material) and fifth lens (glass material) provide specific refractive power and dispersion control, while plastic lenses provide other corrective functions, creating locally optimized quality distribution throughout the system.
3Length of stationary object
If ultra-thin design is implemented, then the lens thickness is reduced for miniaturization, but the optical characteristics and aberration correction capability deteriorate
Solution Approach 1:
The seven lens elements are arranged in a nested sequence from object side to image side, with each lens element contributing to the overall optical correction. The compact nested arrangement allows sufficient optical power and aberration correction capability to be achieved within an ultra-thin form factor, as each lens element is optimally positioned and sized for its specific function.
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 7-piece lens design achieves high-performance imaging with low total optical length, maintaining miniaturization characteristics and effectively correcting spherical and 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
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.