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 element, optimized to achieve ultra-thin and wide-angle performance while correcting aberrations, including the use of plastic and glass materials for different lenses and an optical filter to enhance imaging quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the lens structure is increased to five-piece, six-piece or seven-piece to improve imaging quality, then the imaging quality and chromatic aberration correction are improved, but the lens thickness and device complexity increase
Solution Approach 1:
The lens system is divided into seven distinct lens elements with specific focal lengths and refractive powers. Each lens element (L1-L7) has optimized curvature radii and thickness ratios that work together to correct chromatic aberrations while maintaining a compact overall structure. The segmentation allows independent optimization of each element's contribution to image quality and thickness control.
Solution Approach 2:
The patent employs a composite material strategy by combining plastic and glass materials for different lens elements. Specifically, lenses L1-L3 and L5-L7 use plastic materials while L4 uses glass material. This composite approach enables optimization of each element's refractive properties and dispersion characteristics, achieving superior chromatic aberration correction with controlled total thickness.
2Manufacturing precision
If the lens structure is increased to five-piece, six-piece or seven-piece to improve imaging quality, then the imaging quality and chromatic aberration correction are improved, but the device complexity increases
Solution Approach 1:
The seven-lens system is segmented into functional groups with specific roles: L1-L3 form the front group for light collection and initial aberration control, L4 serves as a transition element with glass material for dispersion correction, and L5-L7 form the rear group for fine-tuning image quality. Each segment has optimized parameters that reduce overall system complexity while maintaining high imaging performance.
Solution Approach 2:
The patent systematically varies key parameters across the seven lens elements including focal lengths (ranging from -9.066mm to 98.099mm), refractive powers (from -1.203 to 3.527), curvature radii ratios, and thickness ratios. These parameter changes are optimized to achieve chromatic aberration correction and wide-angle performance while controlling the complexity of each individual element and the overall assembly.
3Area of stationary object
If the focal length and field of view are optimized for wide-angle performance, then the field of view is increased to 75 degrees, but the lens thickness and aberration control become more difficult
Solution Approach 1:
The seven-lens system is segmented into functional groups with specific roles: L1-L3 form the front group for light collection and initial aberration control, L4 serves as a transition element with glass material for dispersion correction, and L5-L7 form the rear group for fine-tuning image quality. Each segment has optimized parameters that reduce overall system complexity while maintaining high imaging performance.
Solution Approach 2:
The patent employs a composite material strategy by combining plastic and glass materials for different lens elements. Specifically, lenses L1-L3 and L5-L7 use plastic materials while L4 uses glass material. This composite approach enables optimization of each element's refractive properties and dispersion characteristics, achieving superior chromatic aberration correction with controlled total thickness.
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 form, maintaining miniaturization characteristics with improved imaging performance.
Implementation Method 1
from the object side to the image side, the camera optical lens comprises in sequence: an aperture, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh 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.