Five-Lens Camera Optical Lens Wide Angle Ultra-Thinness
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Solution Overview
Problem
Traditional camera optical lenses for handheld devices face challenges in achieving a balance of wide angle, ultra-thinness, and high imaging quality due to unreasonable optical power, lens spacing, and lens shape settings, which affect their ability to meet design requirements for large aperture and wide-angle imaging.
Innovation Solution
A camera optical lens design comprising five lenses with specific refractive power configurations and curvature radii, optimized by satisfying a set of conditions that balance refractive power, lens spacing, and shape to achieve improved imaging quality, wide angle, and ultra-thinness, including aspheric surfaces to correct aberrations and reduce lens thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional five-piece lens structure is used, then good optical performance is achieved, but the lens cannot meet the design requirements of large aperture, ultra-thinness, and wide angle
Solution Approach 1:
The patent applies parameter changes by optimizing the focal length ratios between lenses (f1/f2, f1/f, f4/f, f5/f), curvature radii ratios ((R1+R2)/(R1−R2), (R3+R4)/(R3−R4), (R5+R6)/(R5−R6), (R7+R8)/(R7−R8)), and thickness ratios (d1/TTL, d3/TTL, d5/TTL, d7/TTL, d9/TTL) to achieve wide angle and ultra-thinness while maintaining optical performance
Solution Approach 2:
The patent uses composite lens structures combining five different lens elements with alternating positive and negative refractive powers, where each lens has specific curvature radius and thickness parameters that work together as a composite system to correct aberrations and achieve the desired optical characteristics
2Reliability
If the optical power, lens spacing and lens shape are optimized for wide angle and ultra-thinness, then imaging quality improves, but the lens structure becomes more complex
Solution Approach 1:
The patent systematically optimizes multiple parameters including focal lengths, curvature radii, and thicknesses of five lens elements, establishing specific ratio ranges (e.g., -0.35≤f1/f2≤−0.25, 1.20≤(f1+f4)/f≤1.30) to achieve wide angle and ultra-thinness while maintaining manageable structural complexity
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 with a large aperture, wide angle, and ultra-thinness, suitable for mobile phone and web camera lenses, enhancing imaging quality and reducing lens thickness while correcting various aberrations.
Implementation Method 1
a first lens having a positive refractive power; a second lens having a negative refractive power; a third lens having a negative refractive power; a fourth lens having a positive refractive power; and a fifth lens having a negative refractive power
Data Source
AI summary
The present disclosure provides a camera optical lens satisfying following conditions: −0.35≤f1/f2≤−0.25; 1.20≤(f1+f4)/f≤1.30; 0.18≤d1/f≤0.22; 2.80≤R3/f≤3.50; and −0.28≤(R9+R10)/(R9−R10)≤−0.24, where f denotes a focal length of the camera optical lens; f1, f2 and f4 respectively denote a focal length of a first, second and third lenses; d1 denotes an on-axis thickness of the first lens; R3 and R9 respectively denote a curvature radius of an object-side surface of the second and fifth lenses; and R10 denotes a curvature radius of an image-side surface of the fifth lens. The camera optical lens has a good optical performance and further meets the design requirements of wide angle and ultra-thinness.