Light-Shading Material Surface Roughness Anti-Reflection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing light-shading materials for optical devices face challenges in miniaturization and thinning, requiring improved anti-reflection performance, simplicity in manufacturing, and excellent adhesion between layers, while maintaining hardness and durability.
Innovation Solution
A light-shading material with a specific surface roughness profile, characterized by an arithmetical mean deviation of 0.5 μm or more and a difference between maximum profile peak height and valley depth of less than 3, featuring a base film with a Light-shading layer that has a thickness of 2 μm to 35 μm, and a surface hardness of H or more, achieved through controlled particle size, distribution, and film thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a thick film fixed layer is provided to improve Light-shading property, then anti-reflection performance is improved, but device thickness increases
Solution Approach 1:
The invention changes the surface roughness parameters (Ra≥0.5μm and Rp-Rv<3) of the Light-shading layer to achieve excellent anti-reflection performance with a reduced film thickness of 15μm or less, resolving the contradiction between anti-reflection performance and film thickness
Solution Approach 2:
The invention creates local surface unevenness with specific roughness characteristics (Ra≥0.5μm, Rp-Rv<3) in the Light-shading layer to scatter light effectively, achieving good anti-reflection performance without increasing overall film thickness
2Object-affected harmful factors
If black pigment concentration varies in thickness direction to improve Light-shading property, then anti-reflection performance is improved, but manufacturing complexity increases
Solution Approach 1:
The invention changes from varying pigment concentration in the thickness direction to controlling surface roughness parameters (Ra≥0.5μm and Rp-Rv<3), simplifying the manufacturing process while maintaining excellent anti-reflection performance with a single Light-shading layer
Solution Approach 2:
The invention extracts the light scattering function from the pigment concentration gradient and transfers it to surface roughness control, eliminating the need for complex multi-layer structures or varying concentration profiles
3Volume of moving object
If device is miniaturized and thinned, then device size is reduced, but adhesion between layers deteriorates
Solution Approach 1:
The invention optimizes the surface roughness parameters (Ra≥0.5μm and Rp-Rv<3) of the Light-shading layer to enhance mechanical interlocking and adhesion strength, enabling reliable performance in miniaturized devices with reduced overall thickness
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 material exhibits excellent anti-reflection properties, maintains performance in thin and miniaturized optical devices, and can be produced with a simple process, ensuring long-term effectiveness.
Implementation Method 1
a Light-shading layer which roughens the surface is provided... the arithmetical mean deviation of the assessed profile Ra of the surface is 0.5 μm or more... the difference (Rp−Rv) between the maximum profile peak height Rp and the maximum profile valley depth Rv is less than 3
Data Source
AI summary
A light-shading member for an optical device which has excellent reflection preventing performance can be manufactured by a simple process and can be applied to an optical device which is small and thin. Based on JIS B0601: 2001, the arithmetical mean deviation of the assessed profile Ra of the surface of the light-shading member for an optical device is 0.5 μm or more, and the difference (Rp-Rv) between the maximum profile peak height Rp and the maximum profile valley depth Rv is less than 3. The light-shading member for an optical device preferably has a substrate film and a light-shading layer. The light-shading layer is formed on at least one surface of the substrate film. Further, the light-shading layer has an average film thickness of 2 μm-35 μm.