Three-Lens Camera Optical Lens Design for Ultra-Thin Wide-Angle Imaging
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Solution Overview
Problem
Conventional camera optical lenses with a three-piece lens structure face challenges in achieving high optical performance while meeting the requirements for ultra-thin, wide-angle lenses, due to irrational refractive power, lens spacing, and lens shape settings.
Innovation Solution
A camera optical lens design comprising three lenses with specific refractive power and curvature radius conditions, including a first lens with positive refractive power, a second lens with negative refractive power, and a third lens with positive refractive power, optimized to satisfy conditions such as 0.80≤f1/f≤1.10 and 2.50≤f3/f≤3.50, which balances spherical aberrations and facilitates ultra-thin, wide-angle imaging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional three-piece lens structure is used, then the lens can provide basic imaging function, but it cannot achieve high optical performance while satisfying ultra-thin and wide-angle design requirements
Solution Approach 1:
The patent applies parameter changes by optimizing the refractive indices (nd1=1.5446, nd2=1.6614, nd3=1.5352), Abbe numbers (νd1=56.04, νd2=20.41, νd3=56.12), and curvature radii (R1-R6) of the three lenses to achieve ultra-thin design while maintaining high optical performance. The specific parameter ranges for focal lengths (f1/f=0.80-1.10, f3/f=2.50-3.50) and thickness ratios (d1/d2=1.50-3.50, d3/d5=0.30-1.00) enable the lens to be ultra-thin (TTL/IH≤1.62) with wide-angle capability (FOV≥75°) and excellent aberration correction
Solution Approach 2:
The patent divides the optical system into three distinct lens components with different optical properties. The first lens (positive power) has specific curvature radii R1 and R2, the second lens (negative power) has curvatures R3 and R4, and the third lens (positive power) has curvatures R5 and R6. Each lens segment is optimized independently with specific thickness (d1, d2, d3, d5) and material properties to collectively achieve ultra-thin wide-angle imaging with corrected aberrations
2Length of moving object
If the lens structure is optimized for ultra-thin design, then the thickness is reduced, but the optical performance and aberration correction deteriorate
Solution Approach 1:
The patent uses composite material principles by selecting three different lens materials with specific refractive indices and Abbe numbers. The first lens uses material with nd1=1.5446 and νd1=56.04, the second lens uses material with nd2=1.6614 and νd2=20.41, and the third lens uses material with nd3=1.5352 and νd3=56.12. This composite material approach enables ultra-thin design while achieving excellent chromatic and spherical aberration correction through the complementary optical properties of different materials
Solution Approach 2:
The patent applies local quality by giving each lens component specific local optical properties. The first lens has positive refractive power with specific curvature distribution (R1/R2=0.01-0.10), the second lens has negative refractive power with specific curvature (R3/R4=-0.10 to -10.00), and the third lens has positive refractive power with specific curvature (R5/R6=-10.00 to -20.00). Each lens's local optical characteristics are optimized to correct specific types of aberrations while maintaining ultra-thin overall structure
3Adaptability or versatility
If the focal length and curvature radii are adjusted for wide-angle imaging, then the field of view increases, but the optical performance and imaging quality deteriorate
Solution Approach 1:
The patent applies dynamics by establishing optimal ranges for focal length ratios (f1/f=0.80-1.10, f3/f=2.50-3.50) and curvature radius ratios that dynamically balance wide-angle capability with imaging quality. The focal length relationship (f2/f=-1.16 to -9.71) and thickness ratios (d1/d2=1.50-3.50, d3/d5=0.30-1.00) create a dynamic optical system that achieves FOV≥75° while maintaining excellent aberration correction and imaging quality through coordinated parameter optimization
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, making it suitable for high-pixel camera optical lens assemblies in mobile phones and web cameras, with improved correction of aberrations and miniaturization.
Implementation Method 1
a first lens having a positive refractive power
Implementation Method 2
a second lens having a negative refractive power
Implementation Method 3
a third lens having a positive refractive power
Data Source
AI summary
Provided is a camera optical lens including, sequentially from an object side to an image side: a first lens having a positive refractive power; a second lens having a negative refractive power; and a third lens having a positive refractive power. The camera optical lens satisfies: −0.80≤f1/f≤1.10; 0.30≤d3/d5≤1.00; −20.00≤(R5+R6)/(R5−R6)≤−10.00; 5.00≤R2/f≤50.00; and −10.00≤(R3+R4)/(R3−R4)≤−4.00, where f and f2 denote focal lengths of the camera optical lens and the first lens, respectively; R2, R4 and R6 denote curvature radiuses of image side surfaces of the first, second and third lenses, respectively; R3 and R5 denote curvature radiuses of object side surfaces of the second and third lenses, respectively; d3 denotes an on-axis thickness of the second lens; and d5 denotes an on-axis thickness of the third lens. The camera optical lens can achieve high optical performance while satisfying design requirements for ultra-thin, wide-angle lenses.