Five-Lens Camera Lens Aberration Correction via Segmentation

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Solution Overview

Problem

There is a need for camera lenses with narrow angles and good optical characteristics, particularly for portable modular cameras and Web cameras with high-pixel imaging elements like CCD and CMOS, as existing lens structures struggle to achieve optimal performance within the required focal length and curvature radius ratios.

Innovation Solution

A five-lens camera lens configuration is developed, comprising a first lens with positive refractive power, a second lens with negative refractive power, a third lens with positive refractive power, a fourth lens with positive refractive power, and a fifth lens with negative refractive power, optimized by specific ratios of focal lengths and curvature radii to correct aberrations and achieve narrow-angle imaging with high optical quality.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a three-piece or four-piece lens structure is used, then the lens is simpler and easier to manufacture, but the optical characteristics at narrow angles are insufficient

Engineering Contradiction:

Improveoptical characteristicsVSAvoidlens structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The lens is divided into five separate lens pieces (first through fifth lenses) with alternating positive and negative refractive powers. This segmentation allows each lens to be optimized for specific aberration correction, achieving superior optical characteristics at narrow angles while maintaining manageable complexity through modular design

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Multiple lens elements with different refractive powers are combined in a specific sequence (positive-negative-positive-positive-negative) to achieve synergistic optical effects. The combination of these five lenses creates a unified optical system that corrects various aberrations simultaneously, providing excellent narrow-angle performance

Inventive Principle:

Principle #5Merging (Combining)

2Reliability

If the focal length and curvature radius ratios are not optimized, then the lens design is simpler, but the imaging quality and aberration correction are poor

Engineering Contradiction:

Improveimaging qualityVSAvoiddesign constraints

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent establishes specific parameter ranges for focal lengths (f1, f2, f3, f4, f5) and curvature radii (R1 through R10) that must be satisfied to achieve optimal optical performance. By controlling these parameters within defined boundaries, the design ensures excellent imaging quality and aberration correction while maintaining design feasibility

Inventive Principle:

Principle #35Parameter changes

3Reliability

If a five-lens configuration is implemented, then the optical characteristics are improved, but the manufacturing complexity increases

Engineering Contradiction:

Improveoptical characteristicsVSAvoidlens assembly

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The five-lens configuration is segmented into distinct positive and negative power elements that can be manufactured and tested independently before final assembly. This segmentation facilitates quality control and simplifies the manufacturing process despite the increased number of components

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

By defining specific parameter ranges for each lens element, the patent standardizes the manufacturing requirements. This parameter control enables mass production with consistent quality, reducing the practical difficulty of assembling five-lens systems

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 five-lens configuration effectively achieves a narrow-angle camera lens with improved optical characteristics, satisfying conditions for focal length and curvature radius ratios, thereby enhancing imaging quality for portable and Web cameras.