Seven-Lens Camera Optical Lens for Wide-Angle Ultra-Thin Design
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Solution Overview
Problem
There is an urgent need for a wide-angled camera optical lens with excellent optical characteristics, small size, and fully corrected aberrations, particularly for handheld devices like smartphones and digital cameras.
Innovation Solution
A camera optical lens comprising seven lenses, with specific refractive powers and curvature radii, and satisfying certain relationships between their parameters, such as Abbe numbers, thickness ratios, and curvature ratios, to achieve large aperture, wide-angle, and ultra-thin designs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a multi-piece lens structure is adopted to improve imaging quality, then optical performance is improved, but device complexity and size increase
Solution Approach 1:
The patent applies parameter changes by precisely controlling the Abbe number of the first lens (59.00≤v1≤82.00) and establishing specific ratio relationships between thickness parameters (3.00≤d1/ET1≤5.00) and curvature radii (R8/R7≥2.00, R14/R13≥2.00). These parameter optimizations enable the seven-piece lens structure to achieve excellent imaging quality while managing the inherent complexity of multi-element designs.
2Measurement precision
If pixel area of photosensitive device is shrunk to increase resolution, then imaging quality is improved, but optical system requirements become more stringent
Solution Approach 1:
The patent applies local quality by assigning specific refractive power characteristics to different lens elements. The first lens has positive refractive power with controlled Abbe number, while the second and seventh lenses have negative refractive power. Each lens element is optimized with specific curvature radius ratios and thickness distributions to address local optical requirements, enabling the system to meet stringent precision demands for high-resolution imaging.
3Volume of moving object
If lens size is reduced for portable devices, then device portability is improved, but optical performance may deteriorate
Solution Approach 1:
The patent applies the nesting principle by arranging seven lens elements in a compact sequential structure from object side to image side. The lenses are closely spaced with controlled air gaps, creating a nested configuration that minimizes overall optical length while maintaining individual lens element performance. This enables small form factor suitable for portable devices without sacrificing optical quality.
4Area of moving object
If wide-angle design is implemented, then field of view is improved, but aberration correction becomes more difficult
Solution Approach 1:
The patent applies composite materials principle by combining lens elements with different refractive power characteristics and Abbe numbers. The first lens uses material with high Abbe number (59.00≤v1≤82.00) to reduce chromatic aberration, while positive and negative power elements are复合ed to correct various aberrations. This composite approach enables wide-angle field of view with fully corrected aberrations.
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 achieves excellent optical performance with fully corrected aberrations, making it suitable for high-pixel camera components like CCD and CMOS, and meets the design requirements of large aperture, wide-angle, and ultra-thinness.
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 seventh lens having a negative refractive power
Data Source
AI summary
The present disclosure relates to a technical field of optical lenses, and discloses a camera optical lens. The camera optical lens includes seven lenses. An order of the seven lenses is sequentially from an object side to an image side, which is shown as follows: a first lens having a negative refractive power, a second lens having a negative refractive power, a third lens having a refractive power, a fourth lens having a refractive power, a fifth lens having a refractive power, a sixth lens having a positive refractive power, and a seventh lens having a negative refractive power. While the camera optical lens has good optical performance, the camera optical lens further meets design requirements of large aperture, wide-angle, and ultra-thinness. In addition, on-axis and off-axis chromatic aberrations are fully corrected and the camera optical lens has excellent optical characteristics.