Eight-Element Lens Assembly for Wide-Angle Aberration Control

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Solution Overview

Problem

Conventional optical systems struggle to balance high image quality, low sensitivity, proper aperture size, miniaturization, and desirable field of view due to the scaling down of pixel size in image sensors and increasing functionality requirements.

Innovation Solution

A photographing lens assembly comprising eight lens elements with specific refractive powers and surface configurations, including convex and concave surfaces with inflection points and critical points, to correct aberrations and achieve compactness and high image quality.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If conventional optical systems are used, then the structure is simple, but the image quality is poor and aberrations cannot be corrected

Engineering Contradiction:

Improveimage qualityVSAvoidoptical system structure

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

The optical system is divided into multiple lens elements (first through eighth lens elements) with different refractive powers and surface configurations. Each lens element is designed to correct specific types of aberrations, allowing the system to achieve high image quality through the cumulative effect of multiple specialized components rather than a single complex element.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different lens elements are assigned specific local functions: the first lens element with positive refractive power corrects certain aberrations, the second with negative refractive power corrects others, and subsequent elements address remaining issues. Each lens surface (convex or concave) is optimized for its specific position in the optical path, creating local quality improvements that collectively enhance overall image quality.

Inventive Principle:

Principle #3Local quality

2Area of stationary object

If the field of view is enlarged, then the coverage area increases, but the optical system size increases

Engineering Contradiction:

Improvefield of viewVSAvoidoptical system size

Core Design Contradiction:

Area of stationary objectVSVolume of moving object

Solution Approach 1:

The patent employs multiple curved lens surfaces with specific curvature radii (R1 through R18) to efficiently bend and focus light rays. The convex and concave surfaces are strategically designed to achieve a wide field of view by controlling light paths across different angles, allowing enlarged coverage without proportionally increasing the physical size of the optical system.

Inventive Principle:

Principle #14Spheroidality (Curvature)

Solution Approach 2:

The eight lens elements are arranged in a compact nested configuration where each element is positioned close to the others along the optical axis. This nested arrangement allows the optical system to achieve a large field of view while minimizing the overall axial length and volume of the system.

Inventive Principle:

Principle #7Nested doll (Nesting)

3Measurement precision

If the pixel size is scaled down, then the sensor resolution increases, but the sensitivity decreases

Engineering Contradiction:

Improvesensor resolutionVSAvoidsensor sensitivity

Core Design Contradiction:

Measurement precisionVSUse of energy by moving object

Solution Approach 1:

The patent converts the challenge of small pixel size into a benefit by designing an optical system that delivers highly concentrated and accurate light energy to each small pixel. The multiple lens elements with optimized curvature and refractive power minimize light loss and scattering, ensuring that even tiny pixels receive sufficient focused light energy to maintain sensitivity while achieving high resolution.

Inventive Principle:

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

Solution Approach 2:

The optical system parameters (focal lengths, curvature radii, refractive powers) are precisely adjusted to match the scaled-down pixel dimensions. By changing these optical parameters proportionally, the system maintains optimal light delivery to smaller pixels, preserving sensitivity while enabling higher resolution through reduced pixel pitch.

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 lens assembly effectively corrects aberrations, provides a large field of view, and miniaturizes the optical system while maintaining high image quality and sensitivity, suitable for various electronic devices.

Implementation Method 1

The first lens element with positive refractive power has an object-side surface being convex in a paraxial region thereof. The second lens element has negative refractive power. The eighth lens element with negative refractive power has an object-side surface being concave in a paraxial region thereof.

Methodology Applied

Scientific EffectRefraction: Refraction

Data Source

PatentUS20260003165A1Photographing lens assembly

Publication Date: 2026.01.01 LARGAN PRECISION

AI summary

A photographing lens assembly includes a total of eight lens elements which are, in order from an object side to an image side: a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element, a seventh lens element and an eighth lens element. The first lens element with positive refractive power has an object-side surface being convex in a paraxial region thereof. The second lens element has negative refractive power. The eighth lens element with negative refractive power has an object-side surface being concave in a paraxial region thereof. At least one lens element of the photographing lens assembly has at least one lens surface having at least one inflection point.