Seven-Lens Camera Optical Lens Design for Wide-Angle Imaging
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
There is a demand for a camera optical lens that can achieve large-aperture, ultra-thinness, and wide-angle capabilities while maintaining high imaging performance, which existing miniaturized camera lenses struggle to meet due to limitations in semiconductor manufacturing and lens design.
Innovation Solution
A camera optical lens design comprising seven lenses, with specific refractive indices, focal lengths, and curvature radii optimized to achieve a large-aperture, ultra-thinness, and wide-angle capabilities, including the use of glass materials and aspheric lenses to correct aberrations and improve image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the pixel area of the optical sensor is reduced to achieve miniaturization, then the device size is reduced, but the imaging quality deteriorates
Solution Approach 1:
The optical lens is divided into seven individual lens elements (first lens through seventh lens) with different refractive powers and surface curvatures. This segmentation allows each element to contribute to correcting specific aberrations, enabling high imaging quality in a compact form factor suitable for miniaturized sensors
Solution Approach 2:
Different lens elements have locally optimized properties: the first lens has negative refractive power with specific curvature ratios, the third and fifth lenses have positive refractive power, while the second, fourth, and sixth lenses have negative refractive power. Each lens element's curvature radii and thickness are specifically designed to correct particular aberrations, achieving high imaging quality despite reduced sensor size
2Manufacturing precision
If a multi-element lens structure is used to improve imaging quality, then the imaging performance is improved, but the device complexity increases
Solution Approach 1:
The patent optimizes specific parameter ranges for each lens element to achieve high imaging quality: the first lens has curvature radius ratio R2/R1 between -0.30 and -2.00, the third lens has focal length ratio f3/f between 0.50 and 5.00, and the sixth lens has curvature radius ratio R12/R11 between -5.00 and 5.00. These parameter optimizations simplify the design process while maintaining complex aberration correction capabilities
Solution Approach 2:
The patent specifies refractive index ranges for different lens elements (first lens: 1.70-2.10, second lens: 1.60-1.85, third lens: 1.70-2.10) to optimize optical performance. This material selection strategy enables effective aberration correction across the seven-element structure while managing manufacturing complexity
3Use of energy by moving object
If the aperture is increased to improve light gathering capability, then the sensitivity is improved, but the chromatic aberration increases
Solution Approach 1:
The patent converts the harmful effect of chromatic aberration into a benefit by strategically placing lenses with positive and negative refractive powers throughout the seven-element structure. The first lens (negative), third lens (positive), fourth lens (negative), and sixth lens (negative) work together to disperse and recombine different wavelengths, correcting chromatic aberration while maintaining large aperture for improved light gathering
Solution Approach 2:
The patent optimizes the refractive index parameters of different lens elements to balance light gathering and chromatic aberration correction. The first lens has refractive index 1.70-2.10, the third lens has 1.70-2.10, and the sixth lens has 1.70-2.05, with specific curvature radius ratios that enable effective dispersion control across the aperture
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 effectively meets the requirements of large-aperture, ultra-thinness, and wide-angle imaging with improved optical performance, correcting chromatic aberrations and maintaining sensitivity across medium to long-range distances.
Implementation Method 1
a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens; wherein an on-axis distance from an image-side surface of the third lens to an object-side surface of the fourth lens is d6, a total optical length from an object-side surface of the first lens to an image plane of the camera optical lens along an optic axis of the camera optical lens is TTL
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. On-axis distance d6 from image-side surface of third lens to object-side surface of fourth lens, total optical length TTL, field of view FOV of camera optical lens, full field of view image height IH in diagonal direction of camera optical lens, focal length f of camera optical lens, focal length f3 of the third lens, central curvature radius R3 of object-side surface of second lens, and central curvature radius R4 of image-side surface of second lens satisfy following relational expressions: 0.06≤d6/TTL≤0.20; 90.00≤(FOV×f)/IH≤140.00; 1.00≤f3/f≤5.00; and 1.00≤R4/R3≤15.00. The camera optical lens has good optical performance such as large aperture, wide-angle and ultra-thinness.