Imaging Lens Assembling Element with Nanostructure Anti-Reflection Film
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Solution Overview
Problem
The challenge in the field of portable electronic devices is to develop imaging lens assembly modules that improve environmental tolerance and reduce stray light while meeting increasing quality requirements.
Innovation Solution
An imaging lens assembly module featuring a nanostructure layer with irregularly arranged ridged protrusions and a nanostructure matching layer composed of optically rarer and denser medium layers, which enhance refractive index matching and reduce light reflection, thereby improving environmental tolerance and reducing stray light.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional anti-reflection coatings are used, then light reflection is reduced, but environmental tolerance and stray light reduction are insufficient
Solution Approach 1:
The anti-reflection coating is segmented into multiple functional layers: a nanostructure layer with ridged protrusions for stray light reduction and multiple medium layers with different refractive indices for environmental tolerance. Each layer performs a specific function, collectively achieving both stray light reduction and improved environmental tolerance.
Solution Approach 2:
The coating uses composite material structure combining nanostructure layer (with ridged protrusions) and multiple medium layers (with different refractive indices). This composite structure integrates the light-trapping capability of nanostructures with the environmental stability of multiple protective layers.
2Reliability
If complex multi-layer coatings are applied, then environmental tolerance improves, but manufacturing precision requirements increase
Solution Approach 1:
The patent specifies precise parameter ranges for each layer thickness (e.g., first medium layer: 40-100 nm, second medium layer: 1-33 nm, third medium layer: 40-100 nm) and nanostructure height (80-300 nm). These controlled parameter ranges enable manufacturing precision while achieving the desired environmental tolerance and optical performance.
3Object-affected harmful factors
If nanostructure layer with irregular ridges is added, then stray light reduction improves, but device complexity increases
Solution Approach 1:
The nanostructure layer features local quality variations with irregularly arranged ridged protrusions that have varying heights and spacing. This local irregularity effectively reduces stray light by creating multiple light-trapping pathways, while the overall layer structure remains manageable through defined thickness parameters.
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 solution provides a high-reflection thin film with low reflectance and improved environmental tolerance, enhancing imaging quality and production efficiency while maintaining structural stability.
Implementation Method 1
The nanostructure matching layer is disposed between the assembling element and the nanostructure layer, and includes at least two optically rarer medium layers and at least one optically denser medium layer... improve a matching level of refractive indices between the assembling element and the nanostructure layer
Implementation Method 2
The low-reflection thin film is disposed on a part of surfaces of the assembling element, and includes a nanostructure layer and a nanostructure matching layer... keep a low reflectance
Data Source
AI summary
An imaging lens assembly module has an optical axis, and includes an optical element, an assembling element and a low-reflection thin film, wherein the optical axis passes through the optical element. The assembling element is configured to be assembled with the optical element. The low-reflection thin film is disposed on a part of surfaces of the assembling element, and includes a nanostructure layer and a nanostructure matching layer. The nanostructure layer includes a plurality of ridged protrusions, wherein the ridged protrusions are arranged irregularly. The nanostructure matching layer is disposed between the assembling element and the nanostructure layer, and includes at least two optically rarer medium layers and at least one optically denser medium layer. The at least one optically denser medium layer is stacked between the at least two optically rarer medium layers.