Four-Lens Camera Optical Lens Design for Wide-Angle Imaging
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Solution Overview
Problem
Conventional camera lenses for handheld devices struggle to achieve optimal imaging quality while meeting design requirements for large aperture and wide angle, often compromising on optical performance due to limitations in refractive power, lens spacing, and shape configurations.
Innovation Solution
A camera optical lens design comprising four lenses with specific refractive power configurations and curvature radii, including a first lens with negative refractive power, a second and third lens with positive refractive power, and a fourth lens with negative refractive power, optimized to satisfy conditions such as focal length ratios, curvature ratios, and thickness relationships, ensuring improved imaging quality and reduced aberrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a camera lens uses three or four lenses with traditional configurations, then imaging quality can be improved, but the lens cannot meet design requirements for large aperture and wide angle
Solution Approach 1:
The patent applies parameter changes by optimizing specific optical parameters including focal length ratios (f1/f, f2/f, f3/f, f4/f), curvature radius ratios (R4/R3, R7/R8), thickness ratios (d1/d2, d5/d6), and focal length combinations (f12/f). These parameter optimizations enable the lens system to achieve both high imaging quality and large aperture/wide angle performance simultaneously
Solution Approach 2:
The patent uses a composite lens structure combining four different lens elements with alternating positive and negative refractive powers. This composite configuration allows each lens to contribute differently to the overall optical performance, achieving correction of aberrations while maintaining large aperture and wide angle capabilities
2Adaptability or versatility
If the lens configuration is optimized for large aperture and wide angle, then imaging quality may be compromised
Solution Approach 1:
The patent establishes specific parameter ranges to balance large aperture/wide angle performance with imaging quality: focal length ratios (−3.00≤f1/f≤−1.20, 4.00≤f2/f≤9.00, 0.30≤f3/f≤1.12, −2.18≤f4/f≤−0.57), curvature ratios (15.00≤R4/R3, 2.50≤R7/R8≤6.00), and thickness ratios (0.50≤d1/d2≤1.20, 10.00≤d5/d6≤20.00). These constrained parameter changes ensure optimal performance across multiple metrics
3Ease of manufacture
If traditional lens configurations are used, then manufacturing is simpler, but optical performance requirements cannot be met
Solution Approach 1:
The patent maintains ease of manufacture by using a standard four-lens configuration with conventional manufacturing approaches, while achieving superior optical performance through optimized parameter combinations including focal lengths, curvature radii, and spacing relationships that can be implemented using existing manufacturing capabilities
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 large aperture and wide-angle capabilities, suitable for high-pixel CCD and CMOS imaging elements, while maintaining a compact form factor, effectively addressing the limitations of traditional camera lenses.
Implementation Method 1
a first lens having negative refractive power
Implementation Method 2
a second lens having positive refractive power
Implementation Method 3
a third lens having positive refractive power
Implementation Method 4
a fourth lens having negative refractive power
Data Source
AI summary
A camera optical lens is provided, including, from an object side to an image side: a first lens having negative refractive power; a second having positive refractive power; a third lens having positive refractive power; and a fourth lens having negative refractive power, where the camera optical lens satisfies following conditions: −3.00≤f1/f≤−1.20; 4.00≤f2/f≤9.00; 15.00≤R4/R3; 2.50≤R7/R8≤6.00; and 10.00≤d5/d6≤20.00. The above camera optical lens can meet design requirements for large aperture and wide angle, while obtaining high imaging quality.