Five-Lens Imaging System for Compact Wide-Angle High Resolution
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Solution Overview
Problem
There is a demand for imaging lenses that can achieve a wide angle of view and high imaging performance while minimizing the total length, particularly in compact devices like cellular phones and smartphones, where existing lenses composed of multiple elements struggle to balance resolution and size.
Innovation Solution
The proposed imaging lens configuration consists of five lenses, including a first lens with positive refractive power and a meniscus shape convex toward the object side, a second lens with a biconcave shape, a third lens with a meniscus shape convex toward the image side, a fourth lens with positive refractive power, and a fifth lens with negative refractive power and at least one inflection point on the image side surface, optimized to satisfy specific focal length and curvature ratios for improved optical performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the imaging lens is composed of five or six lenses to achieve high resolution performance, then the imaging quality is improved, but the total length of the lens increases
Solution Approach 1:
The patent applies parameter changes by optimizing the refractive powers, focal lengths, and curvature radii of the five lens elements. Specifically, the first lens has positive refractive power with a meniscus shape convex toward the object side, the second lens has negative refractive power with a biconcave shape, the third lens has positive refractive power with a meniscus shape convex toward the image side, the fourth lens has positive refractive power, and the fifth lens has negative refractive power with at least one inflection point on the image side surface. These parameter optimizations enable high resolution performance while maintaining a compact total length.
2Length of stationary object
If the total length of the lens is decreased for miniaturization, then the device size is reduced, but the angle of view becomes limited
Solution Approach 1:
The patent achieves a wide angle of view in a compact lens by optimizing the refractive powers and curvature radii of the five lens elements. The specific configuration with the first lens having positive refractive power and meniscus shape convex toward the object side, the second lens with negative refractive power and biconcave shape, the third lens with positive refractive power and meniscus shape convex toward the image side, the fourth lens with positive refractive power, and the fifth lens with negative refractive power and inflection point on the image side surface enables both miniaturization and wide angle of view.
3Measurement precision
If the number of lenses is increased to improve imaging performance, then the resolution is enhanced, but the device complexity increases
Solution Approach 1:
The patent optimizes the parameters of five lens elements to achieve high imaging performance. The first lens has positive refractive power with a meniscus shape convex toward the object side, the second lens has negative refractive power with a biconcave shape, the third lens has positive refractive power with a meniscus shape convex toward the image side, the fourth lens has positive refractive power, and the fifth lens has negative refractive power with at least one inflection point on the image side surface. This optimized configuration achieves high resolution with a moderate number of elements, balancing performance and 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
This configuration enables a lens system with high resolution performance and a wide angle of view, from central to peripheral angles, while reducing the total lens length, thereby enhancing imaging capabilities in compact devices.
Implementation Method 1
an imaging lens substantially consisting of, in order from an object side, five lenses of: a first lens that has a positive refractive power and has a meniscus shape which is convex toward the object side; a second lens that has a biconcave shape; a third lens that has a meniscus shape which is convex toward an image side; a fourth lens that has a positive refractive power; and a fifth lens that has a negative refractive power and has at least one inflection point on an image side surface
Data Source
AI summary
An imaging lens substantially consists of, in order from an object side, five lenses of a first lens that has a positive refractive power and has a meniscus shape which is convex toward the object side, a second lens that has a biconcave shape, a third lens that has a meniscus shape which is convex toward an image side, a fourth lens that has a positive refractive power, and a fifth lens that has a negative refractive power and has at least one inflection point on an image side surface. Further, the imaging lens satisfies a predetermined conditional expression.