Transparent Element Anti-Reflecting Layer for Stray Light Control
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Solution Overview
Problem
Existing portable electronic devices suffer from stray light reflections between transparent elements and optical components, which degrade the functional performance of imaging surfaces.
Innovation Solution
Incorporation of an anti-reflecting layer on the inner side surface of a transparent element within the electronic device, featuring a nanostructure layer with ridge-like protrusions and a silicon dioxide structure connection film, reduces light reflections by altering the refractive index and enhancing attachment stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a transparent element is used to separate inner and outer sides of the electronic device, then light transmission is enabled, but stray light reflection occurs between the transparent element and optical component
Solution Approach 1:
An anti-reflecting layer is introduced as an intermediary between the transparent element and the optical component. This intermediate layer reduces the reflection of stray light while maintaining light transmission, thereby resolving the contradiction between enabling light passage and preventing harmful reflections.
Solution Approach 2:
The refractive index parameters of the interface between transparent element and optical component are modified by introducing the anti-reflecting layer with specific refractive index characteristics. This parameter change reduces reflection coefficient and eliminates stray light interference while preserving light transmission functionality.
2Object-generated harmful factors
If the anti-reflecting layer is disposed on the inner side surface of the transparent element, then stray light reflection is reduced, but manufacturing complexity increases
Solution Approach 1:
The anti-reflecting layer is applied locally only on the inner side surface of the transparent element that faces the optical component, rather than coating the entire surface. This localized application reduces manufacturing complexity while effectively addressing stray light reflection at the critical interface.
3Object-generated harmful factors
If conventional anti-reflecting treatments are used, then some reflection is reduced, but reflection across multiple wavelength ranges cannot be effectively minimized
Solution Approach 1:
The anti-reflecting layer utilizes composite material structure with specific refractive index characteristics that enable effective reflection reduction across multiple wavelength ranges including visible and infrared light. This composite approach provides broad-spectrum anti-reflecting performance that single-material treatments cannot achieve.
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 anti-reflecting layer effectively minimizes stray light reflections across various wavelengths, improving image quality and maintaining functionality of optical components like imaging cameras and infrared light-emitting elements.
Implementation Method 1
The anti-reflecting layer is disposed on at least one portion of the inner side surface of the transparent element... the reflection of the stray light between the transparent element and the optical component can be reduced
Data Source
AI summary
An electronic device includes a transparent element, an optical component and an anti-reflecting layer. The transparent element is configured to separate an inner side and an outer side of the electronic device, so that a light passes through the transparent element to enter or leave the electronic device, and the transparent element includes an inner side surface and an outer side surface. The inner side surface faces towards the inner side, and the outer side surface faces towards the outer side. The optical component is corresponding to the inner side surface of the transparent element. The anti-reflecting layer is disposed on at least one portion of the inner side surface of the transparent element.