Nine-Lens Camera Optical Lens Aberration Control
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Solution Overview
Problem
Conventional camera lenses for mobile devices face challenges in achieving optimal optical performance, particularly in terms of large aperture, ultra-thinness, and wide angle while maintaining good imaging quality, due to limitations in refractive power, lens spacing, and lens shape.
Innovation Solution
A camera optical lens design comprising nine lenses with specific refractive powers and curvature radii, optimized through precise focal length and thickness ratios, and curvature radius relationships to balance spherical aberration, field curvature, and chromatic aberration, ensuring large aperture, wide angle, and ultra-thinness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the number of lenses is increased to nine lenses to improve imaging quality, then the optical performance is improved, but the device complexity and total optical length increase
Solution Approach 1:
The patent applies parameter changes by precisely controlling the focal length ratios (f1/f, f2/f, etc.), thickness ratios (d1/TTL, d3/TTL, etc.), and curvature radius relationships ((R1+R2)/(R1-R2), (R7+R8)/(R7-R8), etc.) of each lens element. These parameter optimizations enable the nine-lens system to achieve excellent imaging quality while managing the inherent complexity through mathematical constraints on key optical parameters.
2Illumination intensity
If the aperture is enlarged to improve light gathering capability, then the imaging quality is improved, but the lens diameter and device size increase
Solution Approach 1:
The patent optimizes the aperture size relative to the total optical length through the parameter constraint d1/TTL≤0.12 and other focal length ratios. This allows the system to achieve large aperture for improved light gathering while controlling the overall lens diameter and device size through coordinated optimization of all lens parameters.
3Length of stationary object
If the total optical length is reduced to achieve ultra-thinness, then the device thickness is reduced, but the optical performance and imaging quality deteriorate
Solution Approach 1:
The patent achieves ultra-thinness by constraining the total optical length TTL and individual lens thicknesses (d1/TTL≤0.12, d3/TTL≤0.09, d5/TTL≤0.13, d7/TTL≤0.06, d9/TTL≤0.15, d11/TTL≤0.04) while maintaining optical performance through coordinated optimization of focal length ratios, curvature relationships, and spacing between lens elements.
Solution Approach 2:
The patent divides the optical system into nine distinct lens elements with alternating positive and negative refractive powers. This segmentation allows each element to contribute specifically to correcting aberrations and managing light paths, enabling compact overall length while maintaining imaging quality through distributed optical functions across multiple elements.
4Area of moving object
If the field of view is widened to improve coverage, then the angle of view is increased, but the distortion and aberration increase
Solution Approach 1:
The patent controls optical distortion and aberration in wide-angle applications through specific curvature radius relationships ((R1+R2)/(R1-R2)≥-16.67, (R7+R8)/(R7-R8)≤-1.90) and focal length ratios. These parameter constraints enable the system to achieve widened field of view while maintaining image quality and minimizing distortion through coordinated lens design.
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 performance, meeting requirements for large aperture, wide angle, and ultra-thinness, making it suitable for high-pixel CCD and CMOS imaging elements in mobile devices and web cameras.
Implementation Method 1
a first lens having positive refractive power; a second lens having negative refractive power... wherein the camera optical lens satisfies following conditions: 2.20≤f1/f≤5.00
Data Source
AI summary
A camera optical lens is provided, including from an object side to an image side: a first lens having positive refractive power; a second lens having negative refractive power; a third lens having positive refractive power; a fourth lens having negative refractive power; a fifth lens having positive refractive power; a sixth lens having negative refractive power; a seventh lens having positive refractive power; an eighth lens having positive refractive power; and a ninth lens having negative refractive power, wherein the camera optical lens satisfies following conditions: 2.20≤f1/f≤5.00; and 3.00≤d13/d14≤15.00. The above camera optical lens can meet design requirements for large aperture, wide angle and ultra-thinness, while maintaining good imaging quality.