Six-Lens Optical Module for Compact High-Resolution Imaging
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Solution Overview
Problem
The challenge is to develop a lens module with a high-resolution optical system that is compact enough to be mounted in slim mobile communications terminals, as increasing the number of lenses to achieve high resolution results in an unacceptably long optical system.
Innovation Solution
A lens module configuration with six lenses, including specific refractive powers and surface shapes, such as meniscus and aspherical surfaces, is designed to optimize the optical system's length while maintaining a wide field of view and high resolution, featuring a first lens with negative refractive power, a second lens with negative or positive refractive power, a third lens with positive refractive power, a fourth lens with negative refractive power, a fifth lens with positive refractive power, and a sixth lens with negative refractive power, along with a stop positioned between the second and third lenses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the number of lenses is increased to achieve high resolution, then image resolution is improved, but the length of the optical system increases
Solution Approach 1:
The patent applies parameter changes by carefully selecting and optimizing the refractive powers, curvatures, and materials of each lens in the six-lens system. By adjusting parameters such as the refractive index and curvature radii of individual lenses, the optical system achieves high resolution while maintaining a compact form factor suitable for mobile devices.
Solution Approach 2:
The optical system is segmented into six distinct lenses with specific configurations (convex/concave surfaces, positive/negative refractive powers) arranged in a particular sequence. This segmentation allows each lens to contribute differently to the overall optical performance, enabling high resolution while controlling the total length of the system.
2Ease of manufacture
If the optical system length is decreased for compactness, then ease of mounting in slim terminals is improved, but achieving high resolution becomes more difficult
Solution Approach 1:
The patent optimizes parameters including the refractive powers (positive and negative), curvature radii, and thicknesses of the six lenses to achieve a compact optical system length while maintaining high resolution. The specific configuration of convex and concave surfaces on each lens is designed to maximize optical performance within a reduced form factor.
Solution Approach 2:
The patent utilizes various curved surface configurations including convex and concave surfaces on different lenses. The strategic use of spherical and aspherical surface curvatures allows the system to achieve high resolution in a compact arrangement, enabling the optical system to be mounted in slim mobile terminals.
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 configuration achieves a compact optical system with a field of view of 80 degrees or more and an overall length of 4.60 mm or less, allowing for miniaturization while maintaining high image resolution and manufacturing ease.
Implementation Method 1
a lens module including six lenses... the first to sixth lenses are sequentially disposed from an object side to an image side
Data Source
AI summary
A lens module includes a first lens, a second lens, and a third lens comprising a convex object-side surface and a convex image-side surface. The lens module also includes a fourth lens including a concave object-side surface and a concave image-side surface, a fifth lens including a concave object-side surface, and a sixth lens including an inflection point formed on an image-side surface thereof. The first to sixth lenses are sequentially disposed from an object side to an image side.