Zoom Lens System with Segmented Groups for Image Blurring Correction

Solution Overview

Problem

Current zoom lens systems face challenges in maintaining high optical performance across the entire zoom region, particularly in correcting image blurring caused by camera shake and vibration.

Innovation Solution

A zoom lens system configuration comprising a first lens group with positive power, a second lens group with negative power, a third lens group with positive power, and subsequent lens groups, where the first to third lens groups move along the optical axis, and specific conditions such as −9.0 < fG1/fG2 < −2.0 are satisfied to ensure optimal focal distance ratios and interval adjustments, along with image blurring correction mechanisms.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a conventional zoom lens system is used, then the basic zoom function is achieved, but the optical performance deteriorates across the whole zoom region

Engineering Contradiction:

Improveoptical performanceVSAvoidperformance consistency across zoom region

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The zoom lens system is divided into multiple lens groups (first through sixth lens groups) with different power configurations. Each lens group can move independently along the optical axis during zooming, allowing precise control of optical performance at different zoom positions. The first lens group has positive power, the second has negative power, the third has positive power, and the fourth has negative power, creating a segmented structure that maintains high optical performance across the entire zoom region.

Inventive Principle:

Principle #1Segmentation

2Reliability

If the focal distance ratio fG1/fG2 is not optimized, then the lens configuration is simpler, but image blurring correction becomes insufficient

Engineering Contradiction:

Improveimage blurring correctionVSAvoidfocal distance ratio optimization

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent optimizes the focal distance ratio fG1/fG2 to be within a specific range (−5.0 < fG1/fG2 < −2.0) to achieve effective image blurring correction. By controlling this critical parameter within the specified range, the system achieves high optical performance without requiring overly complex lens configurations. The conditional expression provides a quantitative guideline for designing zoom lens systems with improved image quality.

Inventive Principle:

Principle #35Parameter changes

3Adaptability or versatility

If lens groups are made movable for zooming, then zoom functionality is achieved, but the system becomes more complex

Engineering Contradiction:

Improvezoom functionalityVSAvoidlens group movement mechanism

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The zoom lens system is divided into multiple lens groups (first through sixth lens groups) with different power configurations. Each lens group can move independently along the optical axis during zooming, allowing precise control of optical performance at different zoom positions. The first lens group has positive power, the second has negative power, the third has positive power, and the fourth has negative power, creating a segmented structure that maintains high optical performance across the entire zoom region.

Inventive Principle:

Principle #1Segmentation

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

This configuration provides high optical performance and effective image blurring correction across the entire zoom region, ensuring compactness and maintaining desired optical performance without degrading imaging quality.

Implementation Method 1

a zoom lens system includes a first lens group G1 having a positive power, a second lens group G2 having a negative power, a third lens group G3 having a positive power, and a subsequent lens group having a positive power as a whole

Methodology Applied

Scientific EffectRefraction: Refraction

Data Source

PatentUS10009524B2Zoom lens system, imaging device, and camera

Publication Date: 2018.06.26 PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD

AI summary

A zoom lens system includes a first lens group having a positive power, a second lens group that has a negative power and includes one lens element, a third lens group that has a positive power and includes at least two lens elements, and a subsequent lens group that has a positive power as a whole and includes at least two lens groups in order from an object side to an image side. In zooming operation, at least the first lens group to the third lens group move along an optical axis, and a condition of −9.0<fG1/fG2<−2.0 is satisfied. Where fG1 represents a focal distance of the first lens group and fG2 represents a focal distance of the second lens group.