Five-Lens Camera Module with Aspheric Elements for Ultra-Thin Wide-Angle Imaging

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Solution Overview

Problem

Existing camera lenses with five-piece configurations for mobile phone and webcam applications suffer from insufficient refractive power distribution, improper lens shapes, and inadequate brightness, leading to suboptimal ultra-thin and wide-angle performance with high-luminous flux.

Innovation Solution

A camera lens design comprising five lenses with specific refractive power distributions and aspheric shapes, including a first lens with positive refractive power, a second lens with negative refractive power, and a third and fourth lens with positive refractive power, optimized by constraints on focal distances and curvature radii to achieve ultra-thin, high-luminous flux, and wide-angle performance with improved aberration correction.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If conventional five-piece lens configurations are used with standard refractive power distribution, then the lens structure is simple, but the optical performance is insufficient with TTL/IH≥1.514 and Fno≥2.20

Engineering Contradiction:

Improveoptical performanceVSAvoidrefractive power distribution

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

The patent applies parameter changes by precisely controlling the refractive power distribution across the five lenses through specific focal length ratios (0.80≤f1/f≤1.00, 15.00≤f3/f, etc.) and curvature radius relationships. This optimization transforms the standard configuration into an ultra-thin high-performance lens with TTL/IH≤1.40 and Fno<2.10, resolving the contradiction between structural simplicity and optical excellence.

Inventive Principle:

Principle #35Parameter changes

2Shape

If the first and second lens shapes are conventional, then manufacturing is easy, but ultra-thin and wide-angle performance is insufficient

Engineering Contradiction:

Improveultra-thin wide-angle performanceVSAvoidlens shape

Core Design Contradiction:

ShapeVSEase of manufacture

Solution Approach 1:

The patent employs spheroidality by defining specific curvature radius relationships for the first lens ((R1+R2)/(R1-R2) between -2.00 and -1.40) and second lens ((R3+R4)/(R3-R4) between 2.60 and 5.00). These curved surface designs enable ultra-thin wide-angle performance while maintaining manufacturability through well-defined geometric parameters.

Inventive Principle:

Principle #14Spheroidality (Curvature)

3Illumination intensity

If refractive power of the third lens is standard, then lens configuration is simple, but brightness and ultra-thin performance are insufficient with Fno≥2.20

Engineering Contradiction:

ImprovebrightnessVSAvoidrefractive power distribution

Core Design Contradiction:

Illumination intensityVSDevice complexity

Solution Approach 1:

The patent optimizes brightness by significantly enhancing the third lens's refractive power with the constraint 15.00≤f3/f, making it the strongest positive lens in the system. This parameter optimization, combined with the overall focal length control (0.80≤f1/f≤1.00), achieves Fno<2.10 and ultra-thin performance without excessive 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 results in an ultra-thin, high-luminous flux, wide-angle camera lens with excellent optical properties, achieving a total angle of view above 78° and F-number below 2.10, effectively correcting chromatic and spherical aberrations.