Six-Lens Camera Module with Refractive Power Distribution

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Solution Overview

Problem

Existing camera lenses with six-piece configurations for mobile and web camera modules suffer from insufficient refractive power distribution and improper lens shapes, leading to wide angles and suboptimal optical performance.

Innovation Solution

A camera lens design comprising six lenses with specific refractive power distributions and aspheric shapes, meeting conditions such as 0.35≤f1/f≤0.50 and 3.00≤(R5+R6)/(R5−R6)≤8.00, to achieve a narrow angle of view (≤50°) and small size with excellent optical properties.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Volume of moving object

If six-piece lens configuration is used for miniaturization, then lens size is reduced, but optical performance deteriorates due to insufficient refractive power distribution

Engineering Contradiction:

Improvelens sizeVSAvoidoptical performance

Core Design Contradiction:

Volume of moving objectVSReliability

Solution Approach 1:

The patent applies parameter changes by precisely controlling the refractive power distribution across the six lenses through specific focal length ratios (0.35≤f1/f≤0.50, 0.70≤f2/|f3|≤1.30, 0.80≤|f5/f6|≤1.50) and curvature radius relationships (3.00≤(R5+R6)/(R5−R6)≤8.00). This optimization ensures each lens element contributes appropriately to the overall optical performance while maintaining miniaturization, resolving the contradiction between small size and optical quality.

Inventive Principle:

Principle #35Parameter changes

2Reliability

If refractive power of first lens is increased to improve optical performance, then image quality improves, but lens shape becomes improper and angle of view increases beyond narrow angle requirement

Engineering Contradiction:

Improveoptical performanceVSAvoidlens shape

Core Design Contradiction:

ReliabilityVSShape

Solution Approach 1:

The patent resolves this contradiction by establishing precise parameter ranges for the first lens: the focal length ratio 0.35≤f1/f≤0.50 controls the refractive power to be sufficient for optical performance, while the shape parameter 0.70≤f2/|f3|≤1.30 maintains proper lens geometry. These coordinated parameter changes ensure the first lens provides adequate refractive power without becoming improperly shaped or creating excessive angle of view.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent employs asymmetry in the lens configuration by assigning specific positive or negative refractive powers to different lens elements in a non-uniform distribution. The first lens has positive power while the second and third have negative power, creating an asymmetric power distribution that optimizes both optical performance and angle of view control within the narrow angle requirement (≤50°).

Inventive Principle:

Principle #4Asymmetry

3Reliability

If fourth lens shape is modified to improve optical properties, then aberration correction improves, but refractive power distribution becomes insufficient and angle of view increases

Engineering Contradiction:

Improveoptical propertiesVSAvoidrefractive power distribution

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The patent resolves this contradiction by coordinating multiple parameter changes: the fourth lens shape is optimized through the curvature relationship 3.00≤(R5+R6)/(R5−R6)≤8.00 for aberration correction, while the refractive power distribution is maintained through the focal length ratio 0.80≤|f5/f6|≤1.50. This coordinated parameter optimization ensures that shape modification for aberration correction does not compromise the overall refractive power distribution or increase the angle of view beyond narrow angle requirements.

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 enables the production of small-sized, narrow-angle camera lenses with improved optical performance, correcting aberrations and enhancing image quality.