Seven-Lens Camera Optics for Ultra-Thin Wide-Angle Apertures
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Solution Overview
Problem
There is an urgent need for a camera optical lens that can achieve high optical performance while satisfying design requirements for ultra-thin, wide-angle lenses with a large aperture, which is not adequately addressed by existing technologies.
Innovation Solution
A camera optical lens design comprising seven lenses, each with specific relational expressions for curvature radii, refractive powers, and thicknesses, including glass materials for certain lenses, to balance field curvature, aperture, and wide-angle requirements, while maintaining ultra-thinness and good imaging quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the number of lens elements is increased to improve imaging quality, then optical performance is improved, but device complexity and thickness increase
Solution Approach 1:
The optical system is divided into seven distinct lens elements, each with specific refractive power and surface curvature characteristics. This segmentation allows each lens to contribute to correcting specific aberrations while maintaining overall system performance and enabling compact arrangement
Solution Approach 2:
The patent specifies precise parameter ranges for each lens element including focal length ratios (e.g., 0.30 < f1/f < -0.60), curvature radius relationships (e.g., R1/R2 ratios), and thickness constraints (e.g., 0.05 < d1/TTL < 0.30). These parameter optimizations enable high imaging quality while controlling overall system complexity and thickness
2Use of energy by moving object
If the aperture is enlarged to improve light gathering capability, then sensitivity is improved, but optical aberrations increase
Solution Approach 1:
The patent specifies the f-number range (0.50 < FNO < 1.20) to define the aperture size, and through optimized lens parameter design including refractive powers and surface curvatures, achieves large aperture while controlling optical aberrations
Solution Approach 2:
Different lens elements use materials with different refractive indices and Abbe numbers to correct chromatic and spherical aberrations. The combination of materials with complementary optical properties enables large aperture design while maintaining aberration control
3Area of stationary object
If the field of view is widened to improve coverage range, then detection range is improved, but distortion and aberrations increase
Solution Approach 1:
The seven-lens configuration distributes the wide-angle correction function across multiple elements, with each lens contributing to field curvature and distortion correction. This segmentation enables FOV > 100 degrees while maintaining image quality
Solution Approach 2:
The patent specifies parameter relationships such as focal length ratios (f3/f, f4/f, f5/f), curvature radius ratios (R5/R6, R7/R8), and thickness ratios (d5/TTL, d7/TTL) that optimize the system for wide-angle performance while controlling distortion and field curvature aberrations
4Length of moving object
If the lens thickness is reduced to achieve ultra-thin design, then device compactness is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent specifies thickness ratios (e.g., 0.05 < d1/TTL < 0.30, 0.20 < d3/TTL < 0.50, 0.80 < d5/d7 < 4.00) that define the relative thickness of each lens element. These parameter constraints enable ultra-thin overall design while maintaining manufacturability and optical performance
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 a large aperture and wide-angle with improved optical performance, reduced chromatic aberration, and ultra-thinness, enhancing imaging quality and sensitivity.
Implementation Method 1
a camera optical lens includes 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
Data Source
AI summary
A camera optical lens includes from object side to image side: first lens, second lens, third lens, fourth lens, fifth lens, sixth lens and seventh lens. Central curvature radius of object-side surface of fourth lens is R7, central curvature radius of image-side surface of fourth lens is R8, a field of view of camera optical lens is FOV, f-number of camera optical lens is FNO, total optical length from object-side surface of first lens to image plane of camera optical lens along optic axis is TTL, on-axis thickness of second lens is d3, focal length of sixth lens is f6, focal length of seventh lens is f7, and following relational expressions are satisfied: 1.00≤R7/R8≤3.00; 80.00≤FOV/FNO≤120.00; 10.00≤TTL/d3≤20.00; −4.00≤f6/f7≤−1.00. The camera optical lens has good optical performance such as large aperture and wide-angle.