Five-Lens Camera Optical System with Curvature Ratios for Ultra-Thin Wide-Angle Design
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Solution Overview
Problem
Current camera optical lenses fail to meet the design requirements of wide angle and ultra-thinness while maintaining good optical performance, particularly in handheld devices and high-pixel CCD/CMOS camera systems.
Innovation Solution
A camera optical lens design comprising five lenses with specific refractive power configurations and curvature radius ratios, optimized to balance spherical aberration, field curvature, and thickness, allowing for a compact and wide-angle lens structure with improved imaging quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a five-piece lens structure is adopted to improve imaging quality, then optical performance is improved, but lens thickness increases and wide angle capability is compromised
Solution Approach 1:
The patent applies parameter changes by precisely controlling the curvature radius ratios (R1/R2, R3/R4, R5/R6, R9/R10) and thickness ratios (d8/d9, d6/d8) of the five lens elements. These parameter optimizations allow the lens to achieve wide angle capability and ultra-thinness while maintaining good optical performance, resolving the contradiction between optical quality and physical dimensions.
2Reliability
If a five-piece lens structure is adopted to improve imaging quality, then optical performance is improved, but lens structure complexity increases
Solution Approach 1:
The patent resolves the complexity issue by establishing specific parameter ranges for the five lens elements, including curvature radius ratios and thickness ratios. These standardized parameter constraints simplify the design process and manufacturing while achieving the desired optical performance, balancing complexity with functionality.
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 lens design effectively meets the requirements of wide angle and ultra-thinness while maintaining excellent optical performance, suitable for web cameras and mobile phone camera lenses with high pixels, by balancing refractive power and curvature radii to correct aberrations and reduce thickness.
Implementation Method 1
a first lens L1 having a positive refractive power; a second lens L2 having a negative refractive power; a third lens L3 having a negative refractive power; a fourth lens L4 having a positive refractive power; and a fifth lens L5 having a negative refractive power
Data Source
AI summary
The present invention provides a camera optical lens satisfying following conditions: 0.04≤R1/R2≤0.07, −3.60≤R3/R4≤−2.50, 1.55≤R5/R6≤1.80, 2.80≤R9/R10≤3.20, 0.65≤d8/d9≤0.85, and 0.56≤d6/d8≤0.60; where R1 and R1 respectively denote a curvature radius of an object-side surface and image-side surface of a first lens; R3 and R4 respectively denote a curvature radius of an object-side surface and image-side surface of a second lens; R5 and R6 respectively denote a curvature radius of an object-side surface and image-side surface of a third lens; R9 and R10 respectively denote a curvature radius of an object-side surface and image-side surface of a fifth lens; d6 and d8 respectively denote an on-axis distance from the third lens to the fourth lens and from the fourth lens to the fifth lens; and d9 denotes an on-axis thickness of the fifth lens.