Six-Lens Imaging System for Compact High-Resolution Camera Modules
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Solution Overview
Problem
The challenge is to design an imaging lens system for portable terminals that achieves high magnification and performance while being compact enough to fit within the narrow installation space of a camera module.
Innovation Solution
The proposed imaging lens system consists of six or seven lenses, sequentially arranged from the object side to the imaging plane, and satisfies specific conditional expressions to optimize performance. This includes lenses with varying refractive powers and surface curvatures, such as convex and concave surfaces, to achieve the desired focal lengths and aberration control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If an imaging lens system with a large effective diameter is used to achieve high magnification and high performance, then the performance and resolution are improved, but the installation space requirement increases and becomes difficult to accommodate in portable terminals
Solution Approach 1:
The imaging lens system is divided into multiple lens elements (first lens, second lens, third lens, fourth lens, fifth lens, and sixth lens) with different refractive powers and surface curvatures. Each lens segment contributes specific optical functions, allowing the system to achieve high performance while maintaining a compact overall structure that fits within portable terminal constraints.
Solution Approach 2:
The patent employs specific conditional expressions that define precise relationships between lens parameters including refractive indices, surface curvatures, and spacing. By optimizing these parameters within defined ranges, the system achieves high magnification and resolution while controlling the overall lens diameter and length to fit compact installation spaces.
2Measurement precision
If multiple lenses with varying refractive powers and curvatures are arranged to achieve high resolution and performance, then the imaging quality is improved, but the device complexity increases
Solution Approach 1:
The lens system is segmented into six distinct lens elements, each with specific refractive powers and surface curvatures assigned to control different optical aberrations. This segmentation allows complex optical performance to be achieved through modular design, where each lens contributes a specific function rather than requiring a single complex element.
Solution Approach 2:
Different regions of the lens system have specialized properties - the first lens has a convex object-side surface for specific aberration correction, the second lens has a concave image-side surface for focal control, and subsequent lenses have tailored curvatures and refractive indices to address specific optical challenges locally, optimizing overall performance while maintaining manageable 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
The imaging lens system effectively achieves high resolution and performance, even in low illuminance environments, while being compact enough to fit within the limited space of portable terminals, thus addressing the challenge of integrating high-performance camera modules in portable devices.
Implementation Method 1
an imaging lens system includes a first lens having refractive power; a second lens having refractive power; a third lens having a convex object-side surface; a fourth lens having refractive power; a fifth lens having refractive power; and a sixth lens having refractive power
Data Source
AI summary
An imaging lens system is provided. The imaging lens system includes a first lens having refractive power, a second lens having refractive power, a third lens having a convex object-side surface, a fourth lens having refractive power, a fifth lens having refractive power, and a sixth lens having refractive power. The first lens to the sixth lens are sequentially arranged from an object side toward an imaging plane. The imaging lens system satisfies the conditional expressions TTL/f<1.0 and 0.9<f1/f4<1.4, where TTL is a distance from an object-side surface of the first lens to the imaging plane, f is a focal length of the imaging lens system, f1 is a focal length of the first lens, and f4 is a focal length of the fourth lens.