Six-Lens Imaging System for Distortion Control
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Solution Overview
Problem
Existing imaging lenses for electronic devices face challenges in minimizing image distortion while maintaining a wide angle of view and achieving small, lightweight, high-definition optical performance.
Innovation Solution
The design comprises a specific arrangement of lenses with varying refractive powers and shapes, including a first lens with negative refractive power, a second lens with positive refractive power, and subsequent lenses with alternating powers, along with an aperture between certain lenses, to satisfy specific optical equations and reduce distortion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the angle of view is widened and focal length is narrowed to miniaturize the camera, then the camera becomes smaller and lighter, but image distortion increases
Solution Approach 1:
The imaging lens is divided into six individual lens elements (first lens to sixth lens) with alternating positive and negative refractive powers. Each lens element contributes to correcting specific types of optical aberrations, collectively achieving distortion control while maintaining wide angle of view and compact form factor.
Solution Approach 2:
Different lens elements are assigned specific refractive powers and curvature characteristics tailored to their position in the optical path. The first lens has negative refractive power with specific curvature to control peripheral distortion, while subsequent lenses have optimized local properties to correct chromatic and spherical aberrations introduced by the wide-angle configuration.
2Measurement precision
If multiple lenses are arranged to achieve high-definition optical performance, then image quality improves, but device complexity increases
Solution Approach 1:
Multiple lens elements with different refractive powers are combined in a single integrated imaging lens assembly. The positive and negative power lenses work together to achieve aberration correction and distortion control within a unified optical system, maintaining high-definition performance without requiring separate correction mechanisms.
Solution Approach 2:
The lens design employs systematic variation of key optical parameters including refractive power, curvature radius, and axial thickness across the six lens elements. This parameter optimization enables the system to achieve high-definition optical performance while controlling the overall complexity through standardized design relationships.
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 significantly reduces image distortion while maintaining a wide angle of view, resulting in a small, lightweight, high-definition optical performance suitable for camera modules in electronic devices.
Implementation Method 1
a first lens having a negative (−) refractive power, a second lens having a positive (+) refractive power, a third lens having a positive (+) refractive power, a fourth lens having a negative (−) refractive power, a fifth lens having a positive (+) refractive power, and a sixth lens having a negative (−) refractive power
Data Source
AI summary
An imaging lens is provided. An imaging lens according to an aspect of the present invention comprises a first lens having negative (−) refractive power, a second lens having positive (+) refractive power, a third lens having positive (+) refractive power, a fourth lens having negative (−) refractive power, a fifth lens having positive (+) refractive power, and a sixth lens having negative (−) refractive power, which are arranged in the order from an object side to an image-side, wherein each of the lenses satisfies the equation tan θd×D>−0.2 (where θd is the maximum half-angle of field of view of an optical system, and D is the degree of distortion at the maximum image height).