Five-Lens Camera Optical Lens Aberration Control
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Solution Overview
Problem
Conventional camera optical lenses with a five-lens structure face challenges in achieving optimal optical performance for large apertures, wide angles, and ultra-thinness due to irrational refractive power distribution and lens spacing.
Innovation Solution
A camera optical lens design comprising five lenses with specific refractive power configurations and curvature radius ratios, including a first lens with positive refractive power, a second and third lens with negative refractive power, a fourth lens with positive refractive power, and a fifth lens with negative refractive power, optimized to meet conditions such as 0.90≤f1/f≤1.30 and 10.00≤d1/d2≤25.00, which balances spherical aberration, field curvature, and reduces total optical length.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a five-lens structure is adopted to improve imaging quality, then optical performance is improved, but the lens structure cannot meet the design requirements of large aperture, wide angle and ultra-thinness
Solution Approach 1:
The patent applies parameter changes by precisely controlling the refractive powers of individual lenses (f1/f, f2/f, f3/f, f4/f ratios) and their spacing (d1/d2 ratio), transforming a conventional five-lens structure into one that achieves both high imaging quality and compliance with large aperture, wide angle, and ultra-thinness requirements
Solution Approach 2:
The patent uses composite optical design by combining five different lens elements with alternating positive and negative refractive powers, creating a composite optical system that corrects various aberrations while maintaining compact form factor and meeting modern camera design requirements
2Ease of manufacture
If the refractive power and distance between lenses are not optimized, then manufacturing is simpler, but the lens structure has irrational refractive power distribution and cannot achieve good optical performance
Solution Approach 1:
The patent optimizes specific parameters including the ratio of the on-axis thickness of the first lens to the on-axis distance between the first and second lenses (10.00≤d1/d2≤25.00), curvature radii ratios ((R7+R8)/(R7−R8), (R9+R10)/(R9−R10)), and focal length ratios (0.90≤f1/f≤1.30, −5.00≤f3/f≤−2.50), achieving both manufacturability and superior optical performance
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 good optical performance while meeting the requirements of a large aperture, wide angle, and ultra-thinness, making it suitable for high-pixel mobile phone and webcam applications with improved imaging quality and reduced aberrations.
Implementation Method 1
a first lens having a positive refractive power
Implementation Method 2
a second lens having a negative refractive power, a third lens having a negative refractive power
Implementation Method 3
a fourth lens having a positive refractive power
Implementation Method 4
a fifth lens having a negative refractive power
Data Source
AI summary
A camera optical lens includes first to fifth lenses from an object side to an image side, which are first and fourth lenses having positive refractive power, and second, third and fifth lenses having negative refractive power. The camera optical lens satisfies 0.90≤f1/f≤1.30; −5.00≤f3/f≤−2.50; 10.00≤d1/d2≤25.00; and 0≤(R7+R8)/(R7−R8)≤0.90, where f, f1 and f3 respectively denote focal lengths of the camera optical lens, the first lens, and the third lens, R7 denotes a curvature radius of an object side surface of the fourth lens, R8 denotes a curvature radius of an image side surface of the fourth lens, d1 denotes an on-axis thickness of the first lens, and d2 denotes an on-axis distance from an image side surface of the first lens to an object side surface of the second lens. The camera optical lens has good optical performance and satisfies design requirements of a large angle, a wide angle and ultra-thinness.