Seven-Lens Camera Module Layout for Compact High-Resolution Imaging
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The challenge of securing optical performance in miniaturized camera modules of electronic devices, particularly with high-pixel image sensors, is exacerbated by limitations in lens number and size, which hinders resolution and image quality.
Innovation Solution
A camera module design with a lens assembly comprising at least seven lenses, including specific refractive indices and curvatures, and a focal length ratio that enhances optical performance, allowing for focus and hand tremor correction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the number of lenses is increased to improve optical performance, then resolution and image quality are improved, but device size increases
Solution Approach 1:
The patent implements a nested lens structure where multiple lenses are arranged in a compact, nested configuration within the camera module. The lens assembly includes a first lens, second lens, third lens, and fourth lens positioned in sequence along the optical axis, with each lens carefully positioned to maximize optical performance while minimizing overall module volume. This nested arrangement allows for high-resolution imaging without proportionally increasing device size.
Solution Approach 2:
The patent employs specific refractive index ranges for each lens element to optimize optical performance. The first lens has a refractive index of 1.53-1.55, the second lens has 1.56-1.68, the third lens has 1.53-1.55, and the fourth lens has 1.56-1.68. These parameter changes in refractive indices enable better light refraction and focusing within a compact structure, improving resolution without requiring additional lens volume.
2Measurement precision
If lens size is increased to improve resolution, then optical performance is improved, but miniaturization requirements are compromised
Solution Approach 1:
The patent divides the lens system into four separate lens elements (first lens, second lens, third lens, and fourth lens) with distinct refractive properties. Each lens is segmented to perform specific optical functions, allowing the system to achieve high resolution through coordinated action of smaller individual lens elements rather than relying on a single large lens. This segmentation enables miniaturization while maintaining resolution.
Solution Approach 2:
The patent uses composite optical design combining lenses with different refractive indices and aberration characteristics. The first and third lenses use materials with refractive indices of 1.53-1.55, while the second and fourth lenses use materials with refractive indices of 1.56-1.68. This composite approach allows each lens to be miniaturized while collectively achieving high-resolution imaging through complementary optical properties.
3Measurement precision
If high-pixel image sensors are used to improve image quality, then resolution is improved, but optical performance requirements become more stringent
Solution Approach 1:
The patent incorporates a focus adjustment mechanism that allows dynamic movement of at least one lens element along the optical axis. This dynamic adjustment capability enables the system to maintain optimal focus for high-pixel image sensors by compensating for manufacturing tolerances and achieving precise optical alignment during operation. The focus adjustment mechanism dynamically adapts to different imaging conditions to maintain high image quality.
Solution Approach 2:
The patent employs optical characteristics including specific refractive indices and curvatures that are designed to provide inherent optical feedback for focus detection. The lens assembly configuration allows the system to detect and correct focus status through optical feedback mechanisms, enabling precise alignment without requiring extremely tight manufacturing tolerances. This feedback mechanism compensates for alignment variations in high-pixel sensor systems.
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 improved optical performance and resolution suitable for high-performance image sensors, even in compact electronic devices, by optimizing lens alignment and refractive properties.
Implementation Method 1
a first lens farthest from the image sensor and including a convex surface on a sensor-side surface thereof, the first lens having negative refractive power; a second lens between the first lens and the image sensor, and having positive refractive power
Data Source
AI summary
A camera module includes: an image sensor; and a lens assembly including at least seven lenses aligned along an optical axis and configured to guide light from outside the camera module to the image sensor, where the at least seven lenses include: a first lens farthest from the image sensor and including a convex surface on a sensor-side surface thereof, the first lens having negative refractive power; a second lens between the first lens and the image sensor, and having positive refractive power; a third lens between the second lens and the image sensor, and having positive refractive power; a fourth lens between the third lens and the image sensor, and having positive refractive power or negative refractive power; a fifth lens between the fourth lens and the image sensor, and having negative refractive power.