Seven-Element Camera Optical Lens for Wide-Angle Aberration Correction
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Solution Overview
Problem
There is an urgent need for wide-angle camera lenses with excellent optical characteristics, compact size, and fully corrected aberrations, particularly for handheld devices like smartphones and digital cameras, to meet the demands of miniaturization and improved imaging quality.
Innovation Solution
A seven-element camera optical lens design comprising specific refractive properties and curvature relationships for each lens, including materials like glass and plastic, with aspherical surfaces, to achieve a large aperture, ultra-thinness, and ultra-wide angle, while effectively correcting chromatic and spherical aberrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a multi-element lens structure is employed to improve imaging quality, then optical performance is improved, but device complexity increases
Solution Approach 1:
The lens system is divided into seven distinct elements with specific refractive properties and curvature relationships. Each element is designed to address specific optical aberrations, with the first element providing positive refractive force, the second providing negative refractive force, and so on through the seventh element. This segmentation allows complex optical correction to be achieved through coordinated action of individual elements rather than a single complex element.
Solution Approach 2:
The patent specifies precise parameter relationships including the Abbe number of the first lens (v1), central radii of curvature of various surfaces (R9/R10, R11/R12), on-axis thicknesses (d7/d8), and focal length ratios (f2/f7, f1/f). By optimizing these parameters within specific ranges, the lens achieves excellent optical characteristics while maintaining a manageable seven-element structure rather than requiring more elements.
2Volume of moving object
If the pixel size of photosensitive devices is reduced to enable miniaturization, then device size is reduced, but imaging quality deteriorates
Solution Approach 1:
The patent employs aspherical surfaces for the lens elements, with specific central radii of curvature relationships specified (R9/R10 between 2.50-30.00, R11/R12 between 3.00-10.00). The aspherical curvature allows the lens to correct aberrations more effectively while maintaining a compact seven-element structure, enabling high imaging quality in miniaturized camera modules with reduced pixel sizes.
3Area of stationary object
If a wide-angle lens design is implemented to increase field of view, then imaging coverage is improved, but optical aberrations increase
Solution Approach 1:
The lens system uses a composite structure combining elements with different refractive properties and Abbe numbers. The first lens has Abbe number v1 between 60.00-82.00, while other elements have different optical characteristics. This composite approach allows the lens to achieve wide field of view while correcting chromatic and spherical aberrations through the coordinated optical properties of different 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 lens design achieves excellent optical performance with a wide angle, large aperture, and ultra-thinness, suitable for high-pixel camera elements in smartphones and web cameras, with improved imaging quality and reduced sensitivity.
Implementation Method 1
a first lens having a positive refractive force, a second lens having a negative refractive force, a third lens having a positive refractive force, a fourth lens having a negative refractive force, a fifth lens having a negative refractive force, a sixth lens having a positive refractive force, and a seventh lens having a negative refractive force lens
Data Source
AI summary
Disclosed is a camera optical lens, including: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens. The first, third, and six lenses have a positive refractive force, and the second, fourth, fifth, and seven lenses have a negative refractive force. An Abbe number of the first lens is vi; a central radius of curvature of an objective surface of the fifth lens is R9, a central radius of curvature of an image surface thereof is R10; an on-axis thickness of the fourth lens is d7, and an on-axis distance between the fourth and fifth lenses is d8; a central radius of curvature of an objective surface of the sixth lens is R11, a central radius of curvature of an image surface thereof is R12, and the following relationship expressions are satisfied: 60.00≤v1≤82.00; 2.50≤R9/R10≤30.00; 0.35≤d7/d8≤1.00; 3.00≤R12/R11≤10.00.