Three-Group Zoom Lens Layout for Stable Optical Zooming

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Solution Overview

Problem

Conventional zoom lenses face issues such as complex optical paths, instability leading to image distortion and edge blurring, and increased computational burden due to multiple lens integration, especially when capturing fast-moving objects.

Innovation Solution

A zoom lens module design that adjusts optical magnification by moving two lens groups, simplifying the optical path and reducing computational burden through a segmented lens group configuration, with image plane compensation during zooming and focusing.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple lenses are integrated to achieve long-focus zoom effect, then zoom capability is improved, but device complexity and computational burden increase

Engineering Contradiction:

Improvezoom capabilityVSAvoidoptical path complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The zoom lens module divides the optical system into three distinct lens groups (first, second, and third) with different functions. The first lens group handles wide-angle to telephoto transition, the second lens group performs focusing, and the third lens group provides optical path folding. This segmentation allows each group to be optimized independently, reducing overall system complexity while maintaining zoom capability.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent employs a folded optical path design where the third lens group reflects light back through the first and second lens groups. This nesting of the optical path allows the physical length of the optical system to be reduced while maintaining the equivalent optical path length needed for long-focus zoom, effectively placing optical components within each other's spatial envelope.

Inventive Principle:

Principle #7Nested doll (Nesting)

2Adaptability or versatility

If multiple lenses are coordinated to capture fast-moving objects, then zoom effect is improved, but control complexity and computational algorithms increase

Engineering Contradiction:

Improvezoom effectVSAvoidcontrol complexity

Core Design Contradiction:

Adaptability or versatilityVSExtent of automation

Solution Approach 1:

The patent implements dynamic control where the first lens group moves along the optical axis to transition between wide-angle and telephoto states, while the second lens group dynamically adjusts for focusing. This dynamic configuration allows the system to adapt to different shooting scenarios (fast-moving objects, static subjects) by simply moving lens groups rather than processing complex images computationally.

Inventive Principle:

Principle #15Dynamics

3Productivity

If conventional zooming method is used, then zooming is achieved, but optical path instability causes image distortion and edge blurring

Engineering Contradiction:

Improvezooming functionVSAvoidoptical path stability

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent incorporates image plane compensation through the second lens group that moves to correct imaging position deviations. This feedback mechanism detects and corrects optical path instability in real-time, maintaining image quality across the entire zoom range and eliminating distortion and edge blurring that occur in conventional systems.

Inventive Principle:

Principle #23Feedback

4Productivity

If conventional zoom method is used, then zooming is achieved, but image resolution decreases

Engineering Contradiction:

Improvezooming capabilityVSAvoidimage resolution

Core Design Contradiction:

ProductivityVSMeasurement precision

Solution Approach 1:

The patent replaces computational zooming methods with a mechanical optical zoom system where the first lens group physically moves to change focal length. This mechanical substitution of optical components for computational processing maintains native image resolution by capturing optical magnification directly rather than digitally cropping and enlarging images.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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 maintains high imaging clarity and reduces distortion by continuously adjusting focal length, achieving precise zooming and focusing without complex algorithms.

Implementation Method 1

the first lens group, the second lens group and the third lens group are arranged along an optical axis. An equivalent focal length of the zoom lens module is adjustable by changing the positions of the second lens group and the third lens group to perform zooming

Methodology Applied

Scientific EffectRefraction: Refraction

Data Source

PatentUS20260023248A1Zoom lens module

Publication Date: 2026.01.22 LUXVISIONS INNOVATION TECHNOLOGY CORP LTD

AI summary

A zoom lens module is provided. The zoom lens module includes a first lens group configured as a fixed lens group and positioned near an object side, a second lens group　configured as a movable lens group and disposed adjacent to the first lens group; and a third lens group configured as a movable lens group, disposed adjacent to the second lens group, positioned near an image side. The first lens group, the second lens group, and the third lens group are arranged along an optical axis, and an equivalent focal length of the zoom lens module is adjustable by changing the positions of the second lens group and the third lens group to perform zooming.