Five-Lens Camera Optics for Large-Aperture Ultra-Thin Imaging

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Solution Overview

Problem

The demand for miniaturized camera optical lenses with good imaging quality, large aperture, wide-angle, and ultra-thin design has not been adequately met, particularly for handheld devices like smartphones and digital cameras, due to challenges in correcting aberrations and optimizing lens configurations.

Innovation Solution

A camera optical lens design comprising five lenses with specific refractive powers and geometric constraints, including conditions on thickness, curvature radii, and focal lengths, to achieve optimal optical performance and compact size.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If a multi-piece lens structure is used to improve imaging quality, then optical performance is improved, but device complexity and size increase

Engineering Contradiction:

Improveimaging qualityVSAvoidlens structure complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The optical lens system is divided into five distinct lens elements with specific refractive powers arranged in sequence from the object side to the image side. This segmentation allows each lens element to contribute differently to aberration correction, enabling high imaging quality while maintaining a compact structure suitable for mobile devices.

Inventive Principle:

Principle #1Segmentation

2Volume of moving object

If pixel area of light-sensitive devices is reduced to achieve miniaturization, then device size is reduced, but imaging quality deteriorates

Engineering Contradiction:

Improvedevice sizeVSAvoidimaging quality

Core Design Contradiction:

Volume of moving objectVSMeasurement precision

Solution Approach 1:

The patent specifies precise parameter ranges for the five lens elements including thickness ratios (0.12≤d1/TTL≤0.20), curvature radius ratios (5.00≤R3/R4≤15.00, -1.30≤(R5+R6)/(R5−R6)≤−1.00), and focal length ratios (1.00≤f1/f≤1.35). These parameter optimizations enable the lens system to maintain excellent aberration correction and imaging quality even in miniaturized configurations for small pixel devices.

Inventive Principle:

Principle #35Parameter changes

3Illumination intensity

If aperture is increased to improve light gathering capability, then imaging performance is improved, but lens thickness and complexity increase

Engineering Contradiction:

Improvelight gathering capabilityVSAvoidlens thickness

Core Design Contradiction:

Illumination intensityVSLength of stationary object

Solution Approach 1:

The five lens elements feature asymmetric surface curvatures with specific constraints on object-side and image-side surface radii (e.g., 5.00≤R3/R4≤15.00 for the second lens). This asymmetric design allows the lens system to achieve large aperture with excellent aberration correction while controlling overall thickness, making it suitable for ultra-thin mobile device applications.

Inventive Principle:

Principle #4Asymmetry

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 design achieves excellent optical characteristics, supporting large aperture, wide-angle, and ultra-thin requirements, suitable for high-pixel camera elements in smartphones and digital cameras, with improved aberration correction and reduced sensitivity.