Three-Lens Camera Optical Lens Design for Wide-Angle Ultra-Thin Imaging
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Solution Overview
Problem
Current camera optical lenses for handheld devices face challenges in achieving good optical performance while meeting the design requirements of wide-angle and ultra-thin configurations, due to unreasonably arranged optical focal lengths, lens spacing, and lens shapes.
Innovation Solution
A camera optical lens design comprising three lenses with specific refractive power distributions and curvature radii ratios, along with optimized on-axis and off-axis distances, to balance spherical aberration, field curvature, and achieve a wide-angle field of view while maintaining ultra-thin dimensions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional three-piece lens structure is adopted to achieve good optical performance, then imaging quality is improved, but the lens cannot meet wide-angle and ultra-thin design requirements
Solution Approach 1:
The patent applies parameter changes by optimizing the focal length ratios (f1/f, f2/f, f3/f), curvature radius ratios (R2/R1, R4/R3), and spacing ratios (d2/d4) within specific ranges. These parameter adjustments enable the lens to achieve both good optical performance and wide-angle ultra-thin characteristics, resolving the contradiction between imaging quality and adaptability to modern design requirements
2Length of moving object
If the optical focal length, lens spacing, and lens shape are arranged to achieve wide-angle and ultra-thin design, then device dimensions are reduced, but optical performance deteriorates due to unreasonable arrangement
Solution Approach 1:
The patent systematically optimizes multiple parameters including focal lengths (f1, f2, f3), curvature radii (R1, R2, R3, R4), and spacing distances (d2, d4) within specific ratio ranges. This coordinated parameter adjustment enables the lens to achieve ultra-thin dimensions while maintaining excellent optical performance, directly resolving the contradiction between compact size and optical quality
3Volume of moving object
If the pixel size of photosensitive devices is reduced to enable smaller devices, then device size is decreased, but imaging quality requirements become more stringent
Solution Approach 1:
The patent optimizes the optical parameters of the three-piece lens structure including focal length ratios, curvature radius ratios, and spacing ratios to compensate for the reduced pixel size. These parameter adjustments enable the lens to produce higher quality images that meet the stringent requirements of high-pixel photosensitive devices in compact form factors
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 effectively corrects on-axis and off-axis aberrations, achieves excellent optical characteristics, and meets the requirements of wide-angle and ultra-thin configurations, suitable for high-pixel camera components in mobile devices.
Implementation Method 1
a first lens L1 having a positive refractive power
Implementation Method 2
a second lens L2 having a negative refractive power
Implementation Method 3
a third lens L3 having a positive refractive power
Data Source
AI summary
Disclosed is an optical lens, from an object side to an image side including a first lens, a second lens and a third lens. The camera optical lens satisfies: 1.20≤f1/f≤1.80; −2.00≤f2/f≤−1.00; 0.75≤f3/f≤1.10; −6.00≤R2/R1≤−2.00; 2.20≤R4/R3≤8.00; 1.50≤d2/d4≤3.50; where f, f1, f2 and f3 denote a focal length of the camera optical lens, the first lens, the second lens and the third lens, respectively; R1, R2 denote a central curvature radius of an object-side surface and an image-side surface of the first lens, respectively; R3, R4 denote a central curvature radius of an object-side surface and an image-side surface of the second lens, respectively; d2 denotes an on-axis distance from the image-side surface of the first lens to the object-side surface of the second lens, and d4 denotes an on-axis distance from the image-side surface of the second lens to an object-side surface of the third lens.