Six-Lens Module Aspherical Curvature Compact Focal Length
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
High-resolution lens modules with multiple lenses face challenges in miniaturization due to increased focal length, making them difficult to mount in thin portable devices.
Innovation Solution
A lens module design incorporating specific refractive power and surface configurations for six or more lenses, including convex and concave surfaces, and inflection points on the sixth lens, optimized to reduce overall length while maintaining high resolution and low F-number, using materials like plastic or glass with aspherical surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If six or more lenses are used to achieve high resolution, then image quality is improved, but the focal length increases making the device thicker
Solution Approach 1:
The patent employs aspherical surfaces on multiple lenses (first, third, fourth, and sixth lenses) to correct optical aberrations and improve image quality without requiring additional lens elements. This curvature optimization allows high resolution to be achieved while maintaining a compact focal length, directly resolving the contradiction between image quality and device thickness.
Solution Approach 2:
The patent systematically optimizes multiple parameters including refractive indices (ranging from 1.5 to 1.8), curvature radii, and thickness ratios to achieve both high resolution and short focal length. By changing these physical parameters within specific ranges, the optical system attains superior imaging performance while keeping the overall length minimized.
2Measurement precision
If multiple lenses with complex surface configurations are used to reduce aberration, then image quality is improved, but manufacturing complexity and cost increase
Solution Approach 1:
The patent uses aspherical surfaces with specifically designed curvature profiles on key lenses to correct various optical aberrations (spherical aberration, coma, astigmatism) effectively. These aspherical designs, while optically superior, are manufactured using modern molding techniques that have reduced the complexity and cost premium compared to traditional multi-element spherical lens systems.
Solution Approach 2:
The patent specifies different refractive index materials for different lens elements (ranging from 1.5 to 1.8) to optimize aberration correction. This material selection strategy achieves superior optical performance through composite material properties rather than relying solely on complex geometric configurations, thereby simplifying manufacturing.
3Length of stationary object
If the optical system length is reduced for thin device mounting, then device thickness is decreased, but achieving high resolution becomes more difficult
Solution Approach 1:
The patent utilizes aspherical surfaces on the first, third, fourth, and sixth lenses to maximize light gathering efficiency and resolution within a short optical path. The aspherical curvature optimization enables each lens element to contribute more effectively to image formation, achieving high resolution despite the reduced overall system length.
Solution Approach 2:
The sixth lens serves multiple functions: it acts as the final imaging element, provides aberration correction through its aspherical surface, and features an inflection point design that enhances light control. This multi-functionality allows the optical system to achieve high resolution in a compact configuration without requiring additional dedicated components.
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 lens module with high resolution, reduced aberration, and lower manufacturing costs, enabling effective image capture under low illumination conditions.
Implementation Method 1
a first lens having refractive power and a convex object-side surface; a second lens having refractive power and a convex object-side surface; a third lens having refractive power and a convex object-side surface
Data Source
AI summary
A lens module includes a first lens having positive refractive power, a second lens having positive refractive power, a third lens having negative refractive power, a fourth lens having positive refractive power, a fifth lens having positive or negative refractive power, and a sixth lens having negative refractive power. One or more inflection points may be formed on an image-side surface of the sixth lens.