Nanomesh Composite Filter for Visible Light Transmission and Infrared Reflection
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Solution Overview
Problem
Current heat-shielding structures face challenges in achieving high reflectance in the infrared region while maintaining high visible-light transmittance, as continuous metallic films often compromise on either heat-shielding or visible-light transmission.
Innovation Solution
The development of nanomesh composite filters, comprising a substrate with alternating dielectric layers and nanomesh structures made of metallic wires and holes, which allow for tunable optical behavior to achieve both high visible-light transmission and reflection of longer wavelengths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If continuous metallic films are used for heat shielding, then infrared reflectance is improved, but visible-light transmittance deteriorates
Solution Approach 1:
The continuous metallic film is segmented into discrete nanoscale metallic islands or wires arranged in a periodic pattern. This segmentation allows visible light to pass through the gaps between structures while the metallic components reflect infrared radiation, resolving the contradiction between heat shielding and visible light transmission.
Solution Approach 2:
The metallic structures are designed with specific nanoscale dimensions and spacing that create different optical responses at different wavelengths. The local geometry and material distribution are optimized to achieve high infrared reflectance while maintaining high visible light transmittance, applying local quality to different wavelength regimes.
2Object-affected harmful factors
If high-heat-shielding structures are designed, then infrared reflectance is improved, but visible-light transmittance deteriorates
Solution Approach 1:
The structure combines metallic components (for infrared reflection) with dielectric or transparent materials (for visible light transmission) in a composite architecture. This composite design enables simultaneous achievement of high heat-shielding performance and high visible-light transmittance by leveraging the complementary optical properties of different materials.
Solution Approach 2:
The solution transitions from considering only the two-dimensional film structure to incorporating vertical layering and three-dimensional nanoscale architecture. By designing multi-layer composite structures with controlled thicknesses and compositions, the patent achieves wavelength-selective optical properties that resolve the heat-shielding versus transmittance contradiction.
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 nanomesh composite filters effectively balance visible-light transmittance and infrared reflectance, providing a selective reflector that optimizes heat-shielding properties while maintaining high transmittance in the visible spectrum.
Implementation Method 1
high reflectance in the infrared region where thermal energy is great
Implementation Method 2
transmitting a wavelength in the visible-light region
Implementation Method 3
a plurality of dielectric layers are disposed in an alternating fashion with the plurality of nanomesh structures
Data Source
AI summary
Systems and methods disclosed herein are directed towards the fabrication of a nanomesh composite filter (NCF) that can be manufactured according to various embodiments, all of which are intended to be fabricated in order to control the transmission, reflection, and absorption of various wavelengths bands. In particular, the disclosed embodiments may be used for heat shielding applications where certain wavelength ranges may be desirable to transmit and others may be desirable to reflect.