Six-Lens Camera Assembly for Wide-Angle Imaging in Compact Devices

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Solution Overview

Problem

Existing camera lens assemblies in portable electronic devices face challenges in achieving miniaturization while maintaining good image quality and a wide field-of-view.

Innovation Solution

A camera lens assembly with six lenses, each configured with specific refractive powers and surface shapes, including aspheric surfaces, to optimize focal lengths, curvatures, and spacings, ensuring a wide field-of-view and compact size.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the number of lenses is increased to improve image quality and field-of-view, then imaging performance is improved, but device size and complexity increase

Engineering Contradiction:

Improveimage qualityVSAvoidlens assembly size

Core Design Contradiction:

ReliabilityVSVolume of moving object

Solution Approach 1:

The lens assembly is divided into six distinct lens elements with alternating positive and negative refractive powers, allowing each element to contribute specifically to correcting optical aberrations while maintaining a compact overall structure. This segmentation enables optimized image quality without excessive size increase.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent employs aspheric surfaces on multiple lens elements, transitioning from traditional spherical geometry to aspheric geometry. This dimensional change in surface shape allows for better control of light paths and aberration correction within a smaller form factor, effectively resolving the contradiction between image quality and size.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Volume of moving object

If the focal length is shortened to achieve miniaturization, then device size is reduced, but field-of-view and image quality deteriorate

Engineering Contradiction:

Improvelens assembly sizeVSAvoidfield-of-view

Core Design Contradiction:

Volume of moving objectVSAdaptability or versatility

Solution Approach 1:

Different lens elements are assigned specific refractive powers and surface characteristics tailored to their local optical functions. The alternating positive and negative power elements, combined with aspheric surfaces on specific elements, create localized optical corrections that collectively achieve a wide field-of-view despite the short overall focal length.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The lens system uses a composite arrangement of six different lens elements with varying refractive powers and surface geometries. This composite structure combines the strengths of each individual element to achieve both miniaturization and wide field-of-view capabilities that neither simple lenses nor uniform designs could provide alone.

Inventive Principle:

Principle #40Composite materials

3Reliability

If aspheric surfaces are used to improve image quality and reduce aberrations, then manufacturing complexity and cost increase

Engineering Contradiction:

Improveimage qualityVSAvoidlens manufacturing difficulty

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

Instead of making all six lens elements aspheric, the patent applies aspheric surfaces selectively to specific elements where they provide the greatest optical benefit. This partial application of aspheric geometry achieves significant image quality improvement and aberration correction while limiting the increase in manufacturing complexity and cost.

Inventive Principle:

Principle #16Partial or excessive action

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 achieves a wide field-of-view and miniaturization, enhancing image clarity and depth of field, suitable for portable electronic devices.

Implementation Method 1

a first lens having refractive power; a second lens having positive refractive power, a convex object-side surface and a convex image-side surface; a third lens having negative refractive power and a concave image-side surface; a fourth lens having refractive power; a fifth lens having refractive power and a convex image-side surface; and a sixth lens having negative refractive power and a concave image-side surface

Methodology Applied

Scientific EffectRefraction: Refraction

Data Source

PatentUS12566317B2Camera lens assembly including six lenses of −+−++−, ++−−+− and ++−++− refractive powers

Publication Date: 2026.03.03 ZHEJIANG SUNNY OPTICAL CO LTD

AI summary

The present disclosure discloses a camera lens assembly including, sequentially from an object side to an image side along an optical axis, a stop; a first lens having refractive power; a second lens having positive refractive power, a convex object-side surface and a convex image-side surface; a third lens having negative refractive power and a concave image-side surface; a fourth lens having refractive power; a fifth lens having refractive power and a convex image-side surface; and a sixth lens having negative refractive power and a concave image-side surface. A combined focal length f12 of the first lens and the second lens and half of a maximum field-of-view Semi-FOV of the camera lens assembly satisfy: 1.00 mm<f12/tan(Semi-FOV)<4.50 mm. A maximum field-of-view FOV of the camera lens assembly satisfies: 91.0°<FOV.