Five-Element Imaging Lens for Infinity-to-Macro Focus in Compact Optics

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Solution Overview

Problem

Existing optical imaging lenses for portable electronic devices face challenges in achieving a compact size, thinness, and short length while maintaining the ability to focus at both infinity and macro distances, with multiple lenses occupying excessive space and complicating shooting requirements.

Innovation Solution

An optical imaging lens design comprising five lens elements with specific refractive powers and surface configurations, allowing for a single lens to transition between infinity and macro focusing states, adhering to specific optical relationships and conditions to ensure compactness and high imaging quality.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple lenses with different functions are used to meet diverse shooting requirements, then the imaging functionality and versatility are improved, but the lens assembly occupies more space and becomes more complex

Engineering Contradiction:

Improveshooting functionalityVSAvoidlens assembly space

Core Design Contradiction:

Adaptability or versatilityVSVolume of moving object

Solution Approach 1:

The patent applies a single lens element that can perform multiple functions by transitioning between different focusing states. The lens can focus at infinity, macro distances, and intermediate distances without requiring multiple separate lenses, thereby achieving versatile shooting capabilities while maintaining a compact structure suitable for portable electronic devices

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Adaptability or versatility

If multiple lenses are arranged to cover different object distances, then the focusing capability is improved, but the lens structure becomes more complex and occupies more space

Engineering Contradiction:

Improvefocusing capabilityVSAvoidlens structure

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent employs a dynamic focusing mechanism where a single lens element can change its focusing state between infinity focus and macro focus. This dynamic capability allows the lens to adapt to different object distances without requiring multiple static lenses, thereby simplifying the overall lens structure while maintaining comprehensive focusing capability

Inventive Principle:

Principle #15Dynamics

3Volume of moving object

If a single lens is used to achieve compact size, then the lens volume is reduced, but the ability to focus at both infinity and macro distances becomes difficult to achieve

Engineering Contradiction:

Improvelens volumeVSAvoidfocusing range

Core Design Contradiction:

Volume of moving objectVSAdaptability or versatility

Solution Approach 1:

The patent utilizes parameter changes in the lens system, specifically varying the air gap distance between the lens and the image sensor, to enable a single lens to achieve different focusing states. By changing the axial position parameter of the lens element, the system can transition between infinity focus and macro focus, thereby maintaining compact lens volume while achieving versatile focusing range

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 design achieves a compact, lightweight lens that maintains excellent imaging quality and optical performance across different focusing states, addressing the need for versatile shooting capabilities in portable devices.

Implementation Method 1

The first lens element, the second lens element, the third lens element, the fourth lens element and the fifth lens element each comprise an object-side surface facing toward the object side and allowing imaging rays to pass through as well as an image-side surface facing toward the image side and allowing the imaging rays to pass through

Methodology Applied

Scientific EffectRefraction: Refraction

Data Source

PatentUS12571988B2Optical imaging lens including five lenses of +−++−, +−+−−, +−−+− and −++−− refractive powers

Publication Date: 2026.03.10 GENIUS ELECTRONICS OPTICAL XIAMEN

AI summary

An optical imaging lens includes a first lens element, a second lens element, a third lens element, a fourth lens element and a fifth lens element in sequence along an optical axis from an object side to an image side. When the object moves from infinity to macro, the optical imaging lens correspondingly forms a first focusing state and a second focusing state to achieve the focusing purpose. The fifth lens element has negative refracting power, an optical axis region of the object-side surface of the fifth lens element is concave, and an optical axis region of the image-side surface of the fifth lens element is concave. Lens elements included by the optical imaging lens are only five lens elements, and (TTL*ΔHFOV)/ΔG≤19.000 degrees is satisfied.