Five-Lens Optical Assembly Using High Abbe Number Materials

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Solution Overview

Problem

Existing lens assemblies for electronic products face challenges in further shortening total lens length while maintaining optical performance and resolution, especially with the trend towards miniaturization.

Innovation Solution

The lens assembly uses high Abbe number materials for both the first and second lenses, along with specific refractive powers and configurations for the other lenses, to achieve a shortened total lens length, increased field of view, and good optical performance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Length of stationary object

If high Abbe number material is used for the first lens and low Abbe number material is used for the second lens, then the total lens length is shortened, but the field of view is limited and optical performance deteriorates

Engineering Contradiction:

Improvetotal lens lengthVSAvoidfield of view

Core Design Contradiction:

Length of stationary objectVSAdaptability or versatility

Solution Approach 1:

The patent changes the material parameter (Abbe number) selection strategy by using high Abbe number materials for both the first and second lenses, contrary to the conventional approach. This parameter change, combined with specific refractive power ratios (0≤f1/f2≤6) and curvature relationships, achieves both shortened total lens length and increased field of view while maintaining optical performance

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent employs a composite lens structure where the first and second lenses are both made of high Abbe number materials, creating a composite optical system that leverages the dispersive properties of high Abbe number materials to reduce chromatic aberration while achieving compact dimensions and wide field of view through careful design of the overall lens configuration

Inventive Principle:

Principle #40Composite materials

2Adaptability or versatility

If high Abbe number material is used for both the first and second lenses, then the field of view is increased and optical performance is improved, but the total lens length may increase

Engineering Contradiction:

Improvefield of viewVSAvoidtotal lens length

Core Design Contradiction:

Adaptability or versatilityVSLength of stationary object

Solution Approach 1:

The patent simultaneously optimizes multiple parameters including the focal length ratio (0≤f1/f2≤6), Abbe numbers ((Vd1+Vd2)/2>40), and curvature relationships to achieve a balanced design that increases field of view while controlling total lens length, demonstrating that proper parameter coordination can resolve apparent trade-offs

Inventive Principle:

Principle #35Parameter changes

3Length of stationary object

If the total lens length is further shortened for miniaturization, then the device size is reduced, but the optical performance and resolution deteriorate

Engineering Contradiction:

Improvetotal lens lengthVSAvoidresolution

Core Design Contradiction:

Length of stationary objectVSMeasurement precision

Solution Approach 1:

The patent uses parameter changes in the material properties (high Abbe numbers) and optical design (refractive power ratios, curvature relationships) to shorten total lens length while maintaining resolution by controlling chromatic aberration and other optical errors through the specific material and structural configuration

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent converts the potential harm of using high Abbe number materials (which can increase lens length) into a benefit by demonstrating that these materials, when properly configured with specific refractive power ratios and curvature relationships, actually enable shorter total lens length while improving resolution and reducing chromatic aberration

Inventive Principle:

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

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 results in a lens assembly with a significantly reduced total lens length, enhanced field of view, and improved optical performance, including corrected aberrations and increased resolution.