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 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 conditions for the focal lengths, refractive powers, and curvature radii of each lens to achieve ultra-thin and wide-angle capabilities, including the use of plastic and glass materials, and optical filters to correct aberrations and maintain miniaturization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a traditional three-piece or four-piece lens structure is used, then the device can maintain a simpler structure, but the imaging quality is insufficient for shrinking pixel sizes and high-quality requirements
Solution Approach 1:
The lens system is divided into 7 separate lens elements (L1-L7) with specific optical powers, where each element contributes to correcting different types of aberrations. This segmentation allows for precise control of light paths and improved imaging quality while maintaining a manageable structural complexity through systematic arrangement.
Solution Approach 2:
The patent employs a composite lens structure combining different materials: plastic lenses (L1, L2, L4, L5, L6) and glass lenses (L3, L7). This material composition enables optimization of both weight and optical performance, with plastic providing lightweight flexibility and glass offering superior optical properties for specific elements.
2Length of moving object
If the lens is designed to be ultra-thin for handheld devices, then the device size is reduced, but achieving wide-angle capability and good optical characteristics becomes difficult
Solution Approach 1:
The patent achieves wide-angle capability in an ultra-thin form factor by optimizing the lateral arrangement and curvature of lens surfaces rather than increasing thickness. The asymmetric curvature designs and strategic positioning of lens elements in the horizontal plane enable wide field of view without proportionally increasing the optical path length.
Solution Approach 2:
Multiple lens surfaces employ asymmetric curvature designs with specific radius ratios (e.g., R1/R2, R3/R4, R5/R6 within defined ranges). These curved surfaces are optimized to control light paths for wide-angle imaging while maintaining compact thickness, with each surface curvature carefully calculated to balance field of view and aberration correction.
3Manufacturing precision
If more lens elements are added to improve imaging quality, then the chromatic aberration correction is improved, but the lens thickness and complexity increase
Solution Approach 1:
The patent achieves effective chromatic aberration correction by precisely controlling refractive index parameters and Abbe numbers of lens materials. Specific ranges are defined for refractive powers (e.g., -3f1/f≤-1, 1.7n3≤2.2, 1f6/f7≤10) and material properties, allowing correction of chromatic aberrations with minimal thickness increase through optimized parameter selection rather than simply adding more elements.
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, ultra-thin camera lenses with fully corrected on-axis and off-axis chromatic aberrations, maintaining excellent optical characteristics and miniaturization, suitable for handheld devices with wide-angle and high imaging quality requirements.
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 along the optical axis
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.