Six-Lens Camera Optical Lens Aberration Correction

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Solution Overview

Problem

Current miniature camera lenses for handheld devices and imaging systems face challenges in achieving good optical performance with large aperture, ultra-thin design, and long focal length due to unreasonable optical focal power, lens spacing, and lens shape, despite advancements in semiconductor technology and increasing user demands.

Innovation Solution

A six-lens camera optical lens design is proposed, comprising lenses with specific refractive powers and curvature radii, optimized by conditions such as 65.00≤v1≤90.00, 2.00≤d8/d9≤8.00, and 1.50≤f4/f≤4.00, which includes a glass first lens and plastic subsequent lenses, to achieve improved imaging quality and ultra-thin characteristics.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If a six-piece lens structure is used to improve imaging quality, then optical performance is improved, but the lens structure cannot meet the design requirements of large aperture, ultra-thin and long focal length

Engineering Contradiction:

Improveimaging qualityVSAvoidlens structure

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

The patent applies parameter changes by optimizing the refractive indices, Abbe numbers, and curvature radii of each lens element. Specifically, the first lens has a positive refractive power with a positive Abbe number, while the second through sixth lenses have negative refractive powers with negative Abbe numbers. The curvature radii are carefully selected to satisfy specific mathematical relationships, enabling the lens to achieve large aperture, ultra-thin profile, and long focal length simultaneously while correcting optical aberrations.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent employs composite materials by combining lens elements with different optical properties. The first lens uses a material with positive Abbe number and positive refractive power, while the subsequent five lenses use materials with negative Abbe numbers and negative refractive powers. This composite structure allows each material to contribute its unique optical characteristics, achieving superior imaging quality and aberration correction that cannot be obtained with a single material type.

Inventive Principle:

Principle #40Composite materials

2Volume of moving object

If the pixel area of photosensitive devices is reduced to achieve miniaturization, then device size is reduced, but imaging quality requirements become more stringent

Engineering Contradiction:

Improvedevice sizeVSAvoidimaging quality

Core Design Contradiction:

Volume of moving objectVSManufacturing precision

Solution Approach 1:

The patent applies segmentation by dividing the optical system into six distinct lens elements, each with specific optical functions. The first lens with positive refractive power handles primary light convergence, while the subsequent five lenses with negative refractive powers correct various optical aberrations. This segmented structure allows each element to be optimized for its specific function, achieving high imaging quality in a compact form factor suitable for miniaturized photosensitive devices.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent implements local quality by assigning different optical characteristics to different regions of the lens system. Each lens element has specifically tailored refractive index, Abbe number, and curvature radius to address local optical requirements. For example, the first lens element focuses on primary convergence, while subsequent elements address specific aberration types, ensuring high imaging quality across the entire image field despite miniaturization.

Inventive Principle:

Principle #3Local quality

3Device complexity

If traditional three-piece or four-piece lens structures are used, then device complexity is reduced, but imaging quality is insufficient for high-pixel photosensitive devices

Engineering Contradiction:

Improvelens structureVSAvoidimaging quality

Core Design Contradiction:

Device complexityVSManufacturing precision

Solution Approach 1:

The patent applies parameter changes by transitioning from traditional three or four-piece lens structures to a six-piece configuration with specifically optimized parameters. The first lens has positive refractive power with positive Abbe number, while lenses two through six have negative refractive powers with negative Abbe numbers. This parameter optimization enables the lens to correct chromatic and spherical aberrations more effectively, providing the imaging quality needed for high-pixel photosensitive devices while maintaining reasonable structural complexity.

Inventive Principle:

Principle #35Parameter changes

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 aberrations and achieves excellent imaging performance with a wide aperture and long focal length, suitable for high-pixel CCD and CMOS camera elements, while maintaining miniaturization.