Miniature Imaging Lens with Six-Element Aberration Correction

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Solution Overview

Problem

Current miniature imaging lenses face challenges in achieving high image quality while maintaining miniaturization, especially in low-light conditions, due to the trade-off between lens size and aperture, which limits their performance in portable electronic devices.

Innovation Solution

A miniature imaging lens design comprising six lenses with specific refractive powers and curvature radii, along with an aperture stop, that satisfies certain conditional expressions to balance aberrations and ensure high-definition imaging even in insufficient light, with a focal length ratio less than 2.0, allowing for a large aperture and compact size.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If the chip size is increased to improve image quality, then the imaging quality is improved, but the lens size increases, which contradicts the miniaturization trend

Engineering Contradiction:

Improveimage qualityVSAvoidlens size

Core Design Contradiction:

Measurement precisionVSVolume of moving object

Solution Approach 1:

The patent applies parameter changes by optimizing the focal lengths, refractive indices, and curvature radii of the six lens elements according to specific conditional expressions. This allows the lens to achieve high image quality with a compact form factor, resolving the contradiction between image quality and lens size through precise parameter optimization rather than simply increasing chip size

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent divides the imaging system into six distinct lens elements with alternating positive and negative refractive powers. This segmentation allows each element to contribute specifically to aberration correction and focal control, enabling high-quality imaging in a compact configuration without requiring a single large chip

Inventive Principle:

Principle #1Segmentation

2Illumination intensity

If the aperture is increased to improve light gathering capability and imaging quality in dim conditions, then the imaging quality in low light is improved, but the lens size increases

Engineering Contradiction:

Improvelight gathering capabilityVSAvoidlens size

Core Design Contradiction:

Illumination intensityVSVolume of moving object

Solution Approach 1:

The patent optimizes the aperture parameters and lens element parameters simultaneously according to conditional expressions, enabling a large aperture design that gathers more light while maintaining a compact overall lens size through efficient optical path management and aberration correction

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The lens design achieves multiple functions within a compact structure: the six lens elements collectively provide focusing, aberration correction, and aperture control. This multi-functionality allows the lens to achieve large aperture performance without proportionally increasing size, as each element serves multiple optical purposes

Inventive Principle:

Principle #6Universality (Multi-functionality)

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 design achieves a compact size with a large aperture, ensuring high-definition imaging quality in low-light conditions, balancing aberrations and maintaining miniaturization, making it suitable for portable electronic devices.

Implementation Method 1

The first lens has a positive refractive power, and an object-side surface of the first lens is a convex surface

Methodology Applied