Six-Lens Camera Assembly for Telephoto Ratio and Aberration Control

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Solution Overview

Problem

Existing telephoto lens assemblies for dual-camera technology in portable electronic products face challenges in achieving large image surface, long focal length, small aberrations, and high image quality due to limitations in refractive power, surface shape, and lens spacing.

Innovation Solution

A camera lens assembly comprising six lenses with specific refractive powers and surface shapes, arranged to optimize focal length, image quality, and aberration control, including a combination of positive and negative refractive powers, convex and concave surfaces, and carefully controlled radii and thicknesses to achieve improved telephoto capabilities and image quality.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If existing telephoto lens assemblies are used, then the device complexity is reduced, but the image quality and aberration control deteriorate

Engineering Contradiction:

Improveimage qualityVSAvoidlens assembly structure

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

The telephoto lens assembly is divided into six individual lens elements with specific refractive powers and surface shapes. Each lens element is independently designed and optimized to contribute to the overall optical performance, allowing for better aberration control and image quality while maintaining a manageable structural complexity through modular design

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different regions of the lens assembly are assigned different optical properties. Specifically, the first lens has a positive refractive power with an aspheric object-side surface, the second lens has a positive refractive power, the third lens has a negative refractive power, the fourth lens has a positive refractive power, the fifth lens has a positive refractive power, and the sixth lens has a negative refractive power. This local differentiation of optical properties enables precise control over aberrations and image quality across different field regions

Inventive Principle:

Principle #3Local quality

2Length of moving object

If lens parameters are optimized for long focal length, then the telephoto capability is improved, but the aberration control becomes difficult

Engineering Contradiction:

Improvefocal lengthVSAvoidaberration control

Core Design Contradiction:

Length of moving objectVSManufacturing precision

Solution Approach 1:

The patent applies specific parameter ranges to control aberrations while achieving long focal length. The conditions include: 0.25 ≤ f1/(R1+R2) ≤ 4.00 for the first lens, 1.50 ≤ f2/|R3| ≤ 3.00 for the second lens, −3.00 ≤ f3/|R4| ≤ −1.00 for the third lens, 0.20 ≤ R7/R8 ≤ 1.00 for the fourth lens, 1.00 ≤ |f5/R9| ≤ 3.00 for the fifth lens, and −3.00 ≤ f6/|R10| ≤ −1.00 for the sixth lens. These parameter optimizations enable long focal length with controlled aberrations

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The lens assembly uses a composite design combining six different lens elements with varying refractive powers and surface characteristics. This composite structure allows the system to achieve long focal length while compensating for aberrations through the combined optical effects of all elements, where each lens contributes differently to the overall optical performance

Inventive Principle:

Principle #40Composite materials

3Area of stationary object

If the image surface is enlarged, then the field of view is improved, but the optical distortion increases

Engineering Contradiction:

Improveimage surfaceVSAvoidoptical distortion

Core Design Contradiction:

Area of stationary objectVSManufacturing precision

Solution Approach 1:

The first lens features an aspheric object-side surface with radius of curvature R1, and the second lens has an aspheric object-side surface with radius of curvature R3. The aspheric surfaces are specifically designed to correct optical distortion while maintaining a large image surface, allowing the lens assembly to achieve both wide field of view and low distortion through optimized surface curvature profiles

Inventive Principle:

Principle #14Spheroidality (Curvature)

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 solution effectively enhances the telephoto ratio, reduces optical distortion, and improves image quality by optimizing the refractive power distribution and surface shapes of the lenses, resulting in a lens assembly with long focal length, large image surface, and minimal aberrations, suitable for dual-camera technology.