Seven-Lens Camera Optical Lens Design for Wide Angle and Ultra-Thinness
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Solution Overview
Problem
Current camera optical lenses for portable devices face challenges in achieving good optical performance while meeting design requirements for large aperture, wide angle, and ultra-thinness, particularly due to unreasonable focal length, lens spacing, and lens shape settings.
Innovation Solution
A seven-piece camera optical lens design is proposed, comprising specific refractive power configurations and curvature radius conditions for each lens element, including a first positive refractive power lens, a second negative refractive power lens, and subsequent lenses with optimized refractive powers and curvatures to achieve balanced optical performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a seven-piece lens structure is used to improve optical performance, then imaging quality is improved, but the lens structure becomes too complex to meet large aperture, wide angle and ultra-thinness requirements
Solution Approach 1:
The patent applies parameter changes by optimizing the focal lengths, curvature radii, and spacing of the seven lens elements. Specific parameter ranges are defined (e.g., focal length ratios, curvature radius relationships) to achieve large aperture and wide angle while maintaining thinness, transforming a complex structure into a compact, high-performance optical system that meets mobile device requirements
2Device complexity
If traditional three-piece, four-piece, or five-piece lens structures are used, then the lens structure is simple, but imaging quality is insufficient for high-pixel photosensitive devices
Solution Approach 1:
The patent applies segmentation by dividing the optical system into seven distinct lens elements with specific refractive power configurations (positive, negative, and combined). This segmentation allows each element to correct specific aberrations and contribute to overall imaging quality, enabling the lens to meet the demands of high-pixel photosensitive devices while maintaining a manageable structural complexity through systematic design
3Ease of manufacture
If focal length, lens spacing and lens shape are set traditionally, then the lens structure is easy to manufacture, but it fails to meet large aperture, wide angle and ultra-thinness requirements
Solution Approach 1:
The patent defines specific parameter ranges for focal lengths, curvature radii, and spacing between lens elements that simultaneously achieve large aperture, wide angle, and ultra-thinness. These parameter optimizations are formulated to balance manufacturing feasibility with advanced optical performance requirements, allowing the lens to meet stringent design specifications while remaining manufacturable with current technology
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 excellent optical characteristics, including large aperture, wide angle, and ultra-thinness, effectively correcting on-axis and off-axis aberrations, making it suitable for high-pixel CCD and CMOS camera elements in mobile devices.
Implementation Method 1
a first lens L1 having a positive refractive power
Implementation Method 2
a second lens L2 having a negative refractive power
Implementation Method 3
a third lens L3 having a negative refractive power
Implementation Method 4
a sixth lens L6 having a positive refractive power
Data Source
AI summary
The present disclosure relates to the technical field of optical lens and discloses a camera optical lens satisfying following conditions: 65.00≤v1≤95.00; −6.00≤f2/f≤−1.80; and −30.00≤(R5+R6)/(R5−R6)≤−1.50; where v1 denotes an abbe number of the first lens L1; f denotes a focal length of the camera optical lens; f2 denotes a focal length of the second lens; R5 denotes a central curvature radius of an object-side surface of the third lens; and R6 denotes a central curvature radius of an image-side surface of the third lens. The camera optical lens provided in the present disclosure satisfies design requirements of large aperture, wide angle and ultra-thinness while having good optical functions.