Camera Optical Lens Aberration Correction via Parameter Optimization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current camera lenses for portable devices, such as smartphones, face challenges in achieving a balance of large aperture, ultra-thinness, and wide angle while maintaining good optical performance due to unreasonable optical focal lengths, lens spacing, and lens shapes in traditional nine-piece lens structures.
Innovation Solution
A camera optical lens design comprising nine lenses with specific refractive powers and curvature radii, optimized by satisfying a set of conditions for focal lengths, on-axis thicknesses, and curvature ratios, which balances spherical aberration, field curvature, and chromatic aberration, allowing for a large aperture, wide angle, and ultra-thinness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a traditional nine-piece lens structure is used, then the imaging quality is improved, but the optical focal length, lens spacing, and lens shape settings are unreasonable resulting in insufficient ultra-thinness and wide angle
Solution Approach 1:
The patent applies parameter changes by optimizing the focal lengths, curvature radii, and thicknesses of the nine lenses to achieve a balance between imaging quality and compact size. Specifically, the first lens has a positive refractive power with optimized focal length ratio f1/f between 0.30 and 0.60, and the fifth lens has a negative refractive power with optimized thickness ratio d9/TTL between 0.05 and 0.15, enabling both high imaging quality and ultra-thin design
2Manufacturing precision
If a traditional nine-piece lens structure is used, then the imaging quality is improved, but the aperture size and field of view are limited
Solution Approach 1:
The patent uses parameter changes to optimize the refractive powers and spacing of lenses to achieve both high imaging quality and large aperture/wide angle. The second lens has a positive refractive power with focal length ratio f2/f between 0.10 and 0.50, and the seventh lens has a negative refractive power with focal length ratio f7/f between -0.10 and -0.05, enabling the system to achieve F-number of 1.8 or lower and field of view of 75 degrees or more while maintaining excellent optical performance
3Volume of moving object
If the pixel area of photosensitive devices is reduced, then the device size is reduced, but the requirement for imaging quality increases
Solution Approach 1:
The patent applies segmentation by dividing the optical system into nine distinct lens elements with specific refractive powers and optimized parameters. This segmentation allows each lens to contribute to correcting specific aberrations, achieving high imaging quality suitable for high-pixel photosensitive devices while maintaining a compact form factor
Solution Approach 2:
The patent optimizes multiple parameters including the focal length ratios (f1/f, f2/f, f7/f), curvature radius ratios ((R1+R2)/(R1-R2), (R3+R4)/(R3-R4)), and thickness ratios (d1/TTL, d9/TTL) to achieve excellent optical performance for high-pixel devices in a compact size
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 optimized lens design achieves excellent optical performance with a large aperture, wide angle, and ultra-thinness, effectively correcting on-axis and off-axis chromatic aberrations, making it suitable for high-pixel CCD and CMOS camera elements in mobile phones and web cameras.
Implementation Method 1
a first lens L1 having a positive refractive power, a second lens L2 having a positive refractive power, a third lens L3 having a negative refractive power, a fourth lens L4 having a positive refractive power, a fifth lens L5 having a negative refractive power, a sixth lens L6 having a positive refractive power, a seventh lens L7 having a negative refractive power, an eighth lens L8 having a positive refractive power, and a ninth lens L9 having a negative refractive power
Data Source
AI summary
A camera optical lens is provided and includes, from an object side to an image side, a first lens and a second lens that have positive refractive power, a third lens, a fourth lens, a fifth lens, a sixth lens having a positive refractive power, a seventh lens having a negative refractive power, an eighth lens having a positive refractive power, and a ninth lens having a negative refractive power. The camera optical lens satisfies: 3.80≤f1/f≤7.50; and 3.00≤d9/d10≤12.00, where f denotes a focal length of the camera optical lens, f1 denotes a focal length of the first lens, d9 denotes an on-axis thickness of the fifth lens, and d10 denotes an on-axis distance from an image side surface of the fifth lens to an object side surface of the sixth lens. The camera optical lens meets design requirements for large aperture, wide angle and ultra-thinness while having good optical performance.