Ultra-Wide-Angle Lens Assembly Aberration Control

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Solution Overview

Problem

Conventional ultra-wide-angle lens assemblies face challenges in miniaturization while maintaining high resolution and aberration control, leading to deteriorative imaging quality due to the need for increased lens numbers and compromised aberration control.

Innovation Solution

The ultra-wide-angle lens assembly is designed with a specific configuration of lenses, including a first negative refractive power lens, a second lens with convex and concave surfaces, and a sixth lens with a concave image side surface, meeting specific focal length and curvature radius ratios, which allows for miniaturization and expansion of the field angle while modifying aberrations and improving imaging quality.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Shape

If the number of lenses is increased to achieve wide-angle characteristic, then the field angle is expanded, but the device complexity increases and imaging quality deteriorates

Engineering Contradiction:

Improvefield angleVSAvoidnumber of lenses

Core Design Contradiction:

ShapeVSDevice complexity

Solution Approach 1:

The patent applies parameter changes by optimizing the refractive powers, curvature radii, and thicknesses of each lens element. Specific formulas are provided for these parameters (e.g., -2.0 < f1/f0 < -0.5, 0.5 < R4/R5 < 1.5) to achieve ultra-wide-angle characteristics while controlling aberrations and maintaining compact structure with only six lens elements.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent applies local quality by assigning different refractive powers and surface curvatures to specific lens elements. The first lens has negative refractive power, while the second through sixth lenses have positive refractive powers with specific curvature relationships (e.g., object side surface of second lens is convex, image side surface is concave). This localized optimization of optical properties enables ultra-wide-angle performance with minimal lens count.

Inventive Principle:

Principle #3Local quality

2Shape

If the number of lenses is increased to achieve wide-angle characteristic, then the field angle is expanded, but the imaging quality deteriorates due to aberration control issues

Engineering Contradiction:

Improvefield angleVSAvoidaberration control

Core Design Contradiction:

ShapeVSManufacturing precision

Solution Approach 1:

The patent uses parameter changes with specific formulas to control aberrations: -2.0 < f1/f0 < -0.5 for focal length ratios, 0.5 < R4/R5 < 1.5 for curvature radius ratios, and constraints on lens thicknesses and spacing. These parameter optimizations balance the ultra-wide-angle field angle with effective aberration control.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent converts the potential harm of wide-angle distortion into benefit by using a negative refractive power first lens combined with positive refractive power subsequent lenses. This configuration, along with specific curvature relationships, transforms what would normally be aberration-prone wide-angle optics into a system that achieves ultra-wide coverage while maintaining image quality.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

3Length of moving object

If the lens assembly is miniaturized, then the total length is reduced, but the field angle expansion and aberration control become more difficult

Engineering Contradiction:

Improvetotal lengthVSAvoidfield angle

Core Design Contradiction:

Length of moving objectVSShape

Solution Approach 1:

The patent achieves miniaturization with ultra-wide-angle performance by optimizing parameter ratios: the first lens focal length ratio f1/f0 between -2.0 and -0.5, curvature radius ratio R4/R5 between 0.5 and 1.5, and controlling individual lens thicknesses. These parameter changes enable compact total length while maintaining expanded field angle capability.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent applies curvature optimization with specific constraints on surface radii (e.g., object side surface of second lens is convex, image side surface is concave; image side surface of sixth lens has proximal portion in relative to optical axis in concave shape). These curvature designs enable compact lens spacing and reduced total length while achieving ultra-wide field angle.

Inventive Principle:

Principle #14Spheroidality (Curvature)

4Length of moving object

If the lens assembly is miniaturized, then the total length is reduced, but the aberration control effect deteriorates

Engineering Contradiction:

Improvetotal lengthVSAvoidaberration control

Core Design Contradiction:

Length of moving objectVSManufacturing precision

Solution Approach 1:

The patent maintains aberration control in miniaturized form by enforcing specific parameter relationships: focal length ratios (f1/f0 between -2.0 and -0.5), curvature radius ratios (R4/R5 between 0.5 and 1.5), and constraints on lens thicknesses and spacing. These parameter optimizations ensure effective aberration correction despite reduced total length.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent applies local quality optimization by assigning specific refractive powers and surface curvatures to each lens element in the compact arrangement. The first lens has negative refractive power, while subsequent lenses have positive refractive powers with controlled curvature relationships, enabling effective aberration control in the miniaturized six-element configuration.

Inventive Principle:

Principle #3Local quality

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

This configuration enables the miniaturization of the ultra-wide-angle lens assembly while expanding the field angle, effectively addressing aberrations and enhancing imaging quality by optimizing the distribution of focal powers and curvature radii.