Six-Lens Module Compact Design for Mobile Terminals
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Solution Overview
Problem
High-resolution lens modules with multiple lenses face challenges in miniaturization due to increased length, making them difficult to install in slim mobile communications terminals.
Innovation Solution
A lens module design featuring six lenses with specific refractive powers and surface curvatures, including aspheric shapes and strategically placed inflection points, optimized to reduce overall length while maintaining high resolution and wide field of view.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If six lenses are used to configure an optical system with high resolution, then the resolution is improved, but the length of the optical system increases
Solution Approach 1:
The patent applies parameter changes by optimizing the refractive indices, curvatures, and thicknesses of each lens in the six-lens system. Specifically, the first lens has a refractive index of 1.60-1.70 with a convex object-side surface and concave image-side surface, while the second lens has a refractive index of 1.50-1.60 with both convex surfaces. These parameter optimizations enable the system to achieve high resolution (1300 megapixels) while maintaining a compact length of 4.50mm or less, resolving the contradiction between resolution and length.
2Ease of operation
If the length of the optical system is reduced for miniaturization, then the ease of installation in slim mobile terminals is improved, but the resolution may deteriorate
Solution Approach 1:
The patent divides the optical system into six separate lenses, each with specific refractive powers and surface curvatures. This segmentation allows for optimized light path management and aberration correction within a compact form factor. The first lens (negative refractive power) and second lens (positive refractive power) are positioned to correct chromatic aberration, while subsequent lenses refine the optical path to achieve high resolution (1300 megapixels) in a miniaturized package that can be installed in slim mobile terminals.
3Reliability
If aspheric shapes and inflection points are introduced to correct aberrations, then the optical quality is improved, but the manufacturing complexity increases
Solution Approach 1:
The patent applies local quality by introducing aspheric shapes and inflection points selectively at specific locations where they are most needed for aberration correction. The first lens has a convex object-side surface and concave image-side surface with optimized curvature, while the second lens has both convex surfaces with specific curvature radii. The sixth lens includes inflection points on its image-side surface to correct chromatic and spherical aberrations. This localized application of complex geometry only where necessary achieves high optical quality (correcting chromatic and spherical aberrations) while limiting manufacturing complexity to essential areas.
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 a short overall length of 4.50 mm or less, enabling miniaturization while maintaining a high resolution of 1300 megapixels and a wide field of view of 75° or more, effectively correcting chromatic and aberration issues.
Implementation Method 1
a first lens having negative refractive power, an object-side surface thereof being convex and an image-side surface thereof being concave
Data Source
AI summary
A lens module includes a first lens having negative refractive power, an object-side surface thereof being convex and an image-side surface thereof being concave; a second lens having an object-side surface that is convex; a third lens having an object-side surface that is concave and an image-side surface that is convex; a fourth lens having an object-side surface that is concave; a fifth lens having an object-side surface that is concave and an image-side surface that is convex; and a sixth lens having an object-side surface is convex and having one or more inflection points on an image-side surface thereof. The first to sixth lenses are sequentially disposed in numerical order from the first lens to the sixth lens from an object side of the lens module toward an image side of the lens module.