Five-Lens Optical Module for Compact High-Resolution Imaging
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Solution Overview
Problem
The challenge is to develop a lens module for portable terminals that achieves high resolution imaging with a low F-number of 2.3 or less, despite the reduction in pixel size to 1.12 μm or smaller, while maintaining optical system performance.
Innovation Solution
The lens module consists of five lenses with specific refractive power distributions and surface curvatures, including a first lens with positive refractive power and convex object-side surface, a second lens with two convex surfaces, a third lens with negative refractive power, a fourth lens with positive or negative refractive power, and a fifth lens with inflection points on its image-side surface, satisfying various conditional expressions to optimize optical system parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the pixel size of the imaging device is reduced to 1.12 μm or smaller to decrease device size, then the portability and compactness are improved, but the resolution and image quality deteriorate
Solution Approach 1:
The patent applies parameter changes by optimizing the F-number to 2.3 or less and carefully controlling the pixel size at 1.12 μm or smaller. This allows the imaging device to maintain high resolution despite the reduced pixel size, resolving the contradiction between compactness and image quality through precise parameter optimization.
2Illumination intensity
If the F-number is reduced to 2.3 or less to improve brightness and resolution, then the image quality under low illuminance is improved, but the optical system complexity and manufacturing difficulty increase
Solution Approach 1:
The patent merges multiple optical functions into a compact five-lens system that achieves F-number of 2.3 or less. By carefully designing the lens configuration and surface curvatures, the system attains high brightness and resolution without excessive complexity, resolving the contradiction between performance and manufacturability.
3Volume of moving object
If the lens module is miniaturized to fit portable terminals, then the device compactness is improved, but the optical performance and image quality may deteriorate
Solution Approach 1:
The patent achieves miniaturization while maintaining optical performance by optimizing key parameters: F-number of 2.3 or less, pixel size of 1.12 μm or smaller, and specific lens surface curvatures. These parameter optimizations allow the compact lens module to deliver high-resolution imaging without sacrificing optical quality.
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
This configuration enables high-resolution imaging under low illuminance conditions, minimizes aberrations, and facilitates the miniaturization of the lens module while maintaining image quality and reducing manufacturing costs.
Implementation Method 1
a first lens having positive refractive power and having a convex object-side surface and a concave image-side surface
Implementation Method 2
The fifth lens has one or more inflection points formed on an image-side surface thereof
Data Source
AI summary
A lens module may include: a first lens having positive refractive power and having a convex object-side surface and a concave image-side surface; a second lens having refractive power and having two convex surfaces; a third lens having refractive power and having a convex object-side surface; a fourth lens having refractive power; and a fifth lens having refractive power and having a convex object-side surface, wherein the first lens, the second lens, the third lens, the fourth lens and the fifth lens are disposed in a sequential order from the first lens to the fifth lens.