Six-Lens Imaging System with Inflection Point for Distortion Correction
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Solution Overview
Problem
Existing imaging lenses for digital devices, such as smartphones and cameras, face challenges in achieving high resolution and wide angle of view while effectively correcting distortion, particularly at peripheral angles of view.
Innovation Solution
A six-lens configuration with specific refractive powers and surface curvatures, including a sixth lens with a concave surface and inflection point, optimized to satisfy conditional formulas that enhance focal length, radius of curvature, and distance relationships, allowing for a wide angle of view and improved distortion correction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a six-lens configuration is used to improve imaging performance and widen angle of view, then high resolution and wide angle of view are achieved, but distortion correction becomes insufficient at peripheral angles of view
Solution Approach 1:
The patent applies parameter changes by optimizing the refractive powers, focal lengths, and surface curvatures of all six lenses according to specific conditional formulas. The sixth lens is designed with a concave surface toward the image side and at least one inflection point, which are specific parameter configurations that enable effective distortion correction while maintaining wide angle of view and high imaging performance.
2Measurement precision
If the number of lenses is increased to five or six to achieve high resolution, then imaging performance improves, but device size and complexity increase
Solution Approach 1:
The patent resolves the contradiction between resolution and complexity by carefully selecting and optimizing parameters for each lens element. The specific conditional formulas define precise relationships between focal lengths, refractive powers, and surface curvatures, allowing six lenses to work together efficiently to achieve high resolution without unnecessary complexity. The inflection point configuration on the sixth lens is a parameter optimization that enhances performance while maintaining manageable system complexity.
3Area of stationary object
If a wide angle of view is implemented, then field of view increases, but distortion correction becomes more difficult
Solution Approach 1:
The patent successfully addresses the contradiction between wide angle of view and distortion correction through parameter changes. The sixth lens is specifically designed with a concave surface toward the image side and at least one inflection point, which are parameter configurations that counteract distortion effects. The conditional formulas establish precise relationships between the optical parameters of all lenses, enabling the system to achieve both wide angle of view and effective distortion correction simultaneously.
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 solution enables high imaging performance from central to peripheral angles of view, achieving a wide angle of view while maintaining high resolution and correcting distortion effectively, thus meeting the demands for high-resolution images with a wide field of view.
Implementation Method 1
a sixth lens having a negative refractive power, a concave surface toward an image side, and at least one inflection point on the surface toward the image side
Data Source
AI summary
An imaging lens substantially includes six lenses, constituted by: 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, a concave surface toward an image side, and at least one inflection point in the surface toward the image side; provided in this order from an object side. The imaging lens satisfies a predetermined conditional formula.