7-Element Camera Lens for 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 and digital cameras, where the shrinking pixel size of photosensitive devices and increasing demand for high imaging quality require advanced lens designs.
Innovation Solution
A 7-piece camera optical lens structure is designed, with specific materials and refractive power conditions for each lens element, including plastic and glass materials, to achieve ultra-thin and wide-angle capabilities while correcting aberrations, featuring a focal length and refractive power distribution that balances spherical and chromatic aberrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a traditional three-piece or four-piece lens structure is used, then the device complexity is low, but the imaging quality and chromatic aberration correction are insufficient
Solution Approach 1:
The lens system is divided into seven separate lens elements (first lens through seventh lens) with different materials and refractive powers. Each lens element is segmented to perform specific optical functions, allowing for better correction of chromatic aberration and improved imaging quality while maintaining manageable complexity through modular design
Solution Approach 2:
The lens system uses composite materials including plastic materials (first lens through fifth lens) and glass materials (sixth lens and seventh lens). This combination of different materials with varying refractive indices and aberration characteristics enables comprehensive optical correction while achieving the desired imaging quality
2Volume of moving object
If the pixel size of photosensitive devices is shrunk, then the device miniaturization is achieved, but the imaging quality deteriorates
Solution Approach 1:
The lens system uses specific parameter ranges for focal lengths (f1/f between -3 and -1, f2/f between 0.47 and 1.64, etc.), refractive powers (nd1 between 1.6355 and 1.6613, nd6 between 1.7130 and 1.8014), and curvature radii to optimize the lens performance for miniaturized pixel sizes while maintaining high imaging quality
Solution Approach 2:
The seven lens elements are arranged in a nested configuration within a compact optical path, where each lens element is positioned to work synergistically with others, achieving high imaging quality in a miniaturized form factor suitable for handheld devices
3Manufacturing precision
If a five-piece, six-piece or seven-piece lens structure is used, then the chromatic aberration correction is improved, but the device complexity increases
Solution Approach 1:
Different lens elements are assigned different local qualities - the first lens through fifth lens use plastic materials with specific refractive powers for certain optical corrections, while the sixth and seventh lenses use glass materials with higher refractive powers for additional chromatic aberration correction. This localized optimization achieves comprehensive aberration correction without unnecessary complexity
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 minimal optical length, maintaining miniaturization characteristics and fully 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
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.