7-Element Camera Lens for Ultra-Thin Wide-Angle Imaging
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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, particularly for handheld devices like smartphones, 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 indices, and curvature radii of each lens to achieve ultra-thin and wide-angle capabilities while correcting aberrations, including a combination of plastic and glass materials for the lenses and an optical filter to enhance imaging quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a three-piece or four-piece lens structure is used, then the lens can be kept simple, but the imaging quality and chromatic aberration correction are insufficient
Solution Approach 1:
The lens is divided into seven separate lens elements (L1-L7) with specific configurations. Each lens element has defined curvature radii, thickness, and material properties. The segmentation into multiple elements enables better control of optical paths and chromatic aberration correction while maintaining manageable complexity through systematic design parameters.
2Volume of moving object
If the pixel size of photosensitive devices shrinks, then the device can be miniaturized, but the imaging quality requirement increases
Solution Approach 1:
The patent specifies precise parameter ranges for each lens element including curvature radii (R1-R16), thickness (d1-d7), refractive indices (n1-n7), and Abbe numbers (v1-v7). These parameter changes enable the lens to achieve ultra-thin total optical length (TTL ≤ 5.72mm) while maintaining excellent imaging quality through optimized optical paths and aberration correction.
3Manufacturing precision
If a five-piece, six-piece or seven-piece lens structure is used, then the imaging quality improves, but the lens becomes more complex and harder to manufacture
Solution Approach 1:
The patent employs composite material design with different glass types for each lens element, specifying refractive indices (n1=1.5462, n2=1.6580, n3=1.6580, n4=1.5462, n5=1.5462, n6=1.7274, n7=1.7273) and Abbe numbers (v1=55.95, v2=21.49, v3=21.49, v4=55.95, v5=55.95, v6=24.59, v7=51.31). This composite approach corrects chromatic aberrations while managing manufacturing complexity through standardized material specifications.
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 results in a camera optical lens with excellent optical characteristics, fully corrected on-axis and off-axis chromatic aberrations, and a compact ultra-thin structure, maintaining miniaturization characteristics with improved imaging performance.
Implementation Method 1
an optical filter to enhance imaging quality
Implementation Method 2
specific conditions for the focal lengths, refractive indices, and curvature radii of each lens
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.