Nine-Lens Camera Optical Lens Aberration Correction
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Solution Overview
Problem
Conventional camera lenses with a nine-lens structure suffer from irrational refractive power distribution, spacing, and shape, resulting in insufficient ultra-thinness and wide angle, which affects imaging quality in portable devices.
Innovation Solution
A camera optical lens design comprising nine lenses with specific refractive power configurations and curvature radii, including positive and negative refractive powers, optimized to achieve a large aperture, ultra-thinness, and wide angle, with constraints on focal lengths, on-axis thicknesses, and curvature radii to correct aberrations and reduce optical system length.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a nine-lens structure is adopted to improve imaging quality, then imaging quality is improved, but the lens thickness increases and ultra-thinness is insufficient
Solution Approach 1:
The patent applies parameter changes by precisely controlling the focal lengths, thicknesses, and spacing of each lens element. Specific ratios are defined (f1/f between 3.50-5.00, d3/d4 between 2.50-10.00) to optimize the nine-lens structure, achieving both high imaging quality and reduced overall thickness through mathematical optimization of optical parameters.
Solution Approach 2:
The nine-lens structure is segmented into specific groups with defined refractive powers (positive and negative). The lenses are divided into object-side positive power lenses (1st-4th), negative power lenses (5th-7th), and image-side positive power lenses (8th-9th), with each segment serving specific optical functions to balance imaging quality and thickness.
2Manufacturing precision
If a nine-lens structure is adopted to improve imaging quality, then imaging quality is improved, but the angle of view is insufficient
Solution Approach 1:
The patent uses parameter changes by defining specific focal length ratios and curvature radius relationships to expand the angle of view. The focal length ratio f1/f (3.50-5.00) and other optical parameters are optimized to achieve a wider field of view while maintaining imaging quality through precise mathematical control of optical characteristics.
3Manufacturing precision
If the refractive power distribution is increased to improve imaging quality, then imaging quality is improved, but the sensitivity to manufacturing errors increases
Solution Approach 1:
The patent applies parameter changes by establishing specific ratio ranges for focal lengths and thicknesses that balance optical performance with manufacturing tolerance. The defined ranges (f1/f: 3.50-5.00, d3/d4: 2.50-10.00) optimize the system to be less sensitive to manufacturing variations while maintaining high imaging quality.
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, a large aperture, wide angle, and ultra-thinness, making it suitable for high-pixel CCD and CMOS camera lenses in mobile devices with improved imaging quality and reduced sensitivity.
Implementation Method 1
a first lens L1 having positive refractive power
Implementation Method 2
a fifth lens L5 having negative refractive power
Implementation Method 3
an eighth lens L8 having positive refractive power
Implementation Method 4
a ninth lens L9 having negative refractive power
Data Source
AI summary
Provided is a camera optical lens, including, from object side to image side, a first lens having positive refractive power; a second lens having positive refractive power; a third lens having positive refractive power; a fourth lens having positive refractive power; a fifth lens having negative refractive power; a sixth lens; a seventh lens having negative refractive power; an eighth lens having positive refractive power; and a ninth lens having negative refractive power. The camera optical lens satisfies 3.50≤f1/f≤5.00 and 2.50≤d3/d4≤10.00, where f denotes a focal length of the camera optical lens, f1 denotes a focal length of the first lens, d3 denotes an on-axis thickness of the second lens, and d4 denotes an on-axis distance from an image side surface of the second lens to an object side surface of the third lens. The lens has large aperture, wide angle and ultra-thinness while having good optical performance.