Six-Lens Optical Module Compact Design for Thin Terminals
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Solution Overview
Problem
High-resolution lens modules with multiple lenses face challenges in miniaturization due to increased length, making it difficult to mount them in thin mobile communications terminals.
Innovation Solution
A lens module design with specific refractive powers and surface curvatures for six lenses, including a first lens with negative refractive power, a second lens with positive refractive power, a third lens with concave surfaces, a fourth lens with positive refractive power, a fifth lens with negative refractive power, and a sixth lens with negative refractive power and inflection points, optimized to satisfy certain focal length and curvature ratios, allowing for a compact optical system with a wide field of view.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a high-resolution optical system is configured using six lenses, then the resolution is improved, but the length of the optical system is increased
Solution Approach 1:
The patent applies parameter changes by optimizing the refractive powers, curvatures, and spacing of the six lenses to achieve high resolution while minimizing the overall optical system length. Specific conditional expressions define the relationships between focal lengths and other parameters to balance resolution and compactness.
Solution Approach 2:
The patent utilizes aspherical surfaces on multiple lenses (first, third, fourth, and sixth lenses) to correct aberrations and improve resolution. The aspherical shapes allow for better light control and reduced optical path length compared to traditional spherical lenses, addressing both resolution and length requirements.
2Measurement precision
If the optical system length is increased to achieve high resolution with six lenses, then the resolution is improved, but the ease of mounting in thin terminals is worsened
Solution Approach 1:
The patent optimizes multiple parameters including refractive powers (f1/f, f5/f ratios), lens spacings, and surface curvatures to achieve a compact configuration. The conditional expressions ensure that the optical system maintains high resolution while keeping the total length suitable for thin terminal mounting.
Solution Approach 2:
The optical system is segmented into six distinct lenses with specific functions assigned to each. This segmentation allows for optimized light control and aberration correction at each stage, enabling high resolution in a compact overall structure that is easier to mount in thin 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 design achieves a compact lens module with high resolution and a wide field of view while maintaining a short overall length, enabling efficient miniaturization and improved aberration correction.
Implementation Method 1
a first lens, an object-side surface of which is convex; a second lens, both surfaces of which are convex; a third lens, both surfaces of which are concave; a fourth lens having positive refractive power, both surfaces of which are convex; a fifth lens, an object-side surface of which is concave; and a sixth lens, an object-side surface of which is convex
Implementation Method 2
a second lens, both surfaces of which are convex; a fourth lens having positive refractive power, both surfaces of which are convex
Implementation Method 3
a third lens, both surfaces of which are concave
Implementation Method 4
a sixth lens, an object-side surface of which is convex, the sixth lens having one or more inflection points on an image-side surface of the sixth lens
Data Source
AI summary
A lens module includes a first lens, an object-side surface thereof being convex; a second lens, both surfaces thereof being convex; a third lens, both surfaces thereof being concave; a fourth lens having positive refractive power, both surfaces thereof being convex; a fifth lens, an object-side surface thereof being concave; and a sixth lens, an object-side surface thereof being convex. 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.