Imaging Lens Light Blocking Sheet With Micro-Nanostructures
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Solution Overview
Problem
Conventional optical systems struggle to meet high optical quality requirements due to non-imaging light reflection, affecting image quality in electronic devices.
Innovation Solution
The imaging lens incorporates a light blocking sheet with microstructures and nanostructure layers on inner ring surfaces to scatter and reduce non-imaging light reflection, using protrusions with specific height ranges and angles to enhance anti-reflection properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional optical systems are used, then the structure is simple, but non-imaging light reflection occurs which degrades image quality
Solution Approach 1:
The patent applies local quality by adding microstructures and nanostructure layers specifically on the inner ring surfaces of the light blocking sheet and lens barrel, rather than modifying the entire optical system. This localized treatment reduces non-imaging light reflection at critical interfaces while keeping the rest of the structure simple and easy to manufacture.
Solution Approach 2:
The patent uses composite structures by combining microstructures (with heights of 0.25-19 micrometers) and nanostructure layers (with heights of 98-350 nanometers) on the same surface. This multi-scale composite approach effectively reduces reflection across different wavelengths and angles of incident light, improving image quality without significantly complicating the manufacturing process.
2Object-affected harmful factors
If microstructures and nanostructure layers are added to reduce reflection, then image quality improves, but device complexity increases
Solution Approach 1:
The microstructures and nanostructure layers are applied only on the inner ring surfaces where non-imaging light reflection is most problematic, rather than coating all optical surfaces. This localized application reduces the overall complexity of the device while effectively addressing the reflection issue at critical locations.
Solution Approach 2:
The patent implements a nested structure where nanostructure layers (98-350 nm height) are positioned within or alongside microstructures (0.25-19 μm height) on the inner ring surfaces. This nested multi-scale architecture maximizes the anti-reflection effect within a compact space, improving image quality without proportionally increasing device complexity.
3Object-affected harmful factors
If nanostructure layers with specific height ranges are used, then reflectivity is reduced across wavelengths, but manufacturing precision requirements increase
Solution Approach 1:
The patent combines microstructures (0.25-19 μm) and nanostructure layers (98-350 nm) to create a multi-scale composite surface. This composite approach broadens the effective wavelength range for reflection reduction and provides manufacturing tolerance, as the microstructures can compensate for variations in nanostructure height, thereby reducing the stringency of manufacturing precision requirements.
Solution Approach 2:
The patent specifies parameter ranges (microstructure height: 0.25-19 μm, nanostructure layer height: 98-350 nm) rather than fixed values, allowing for manufacturing variability. This parameter optimization approach ensures effective reflection reduction across different wavelengths while accommodating practical manufacturing tolerances, balancing performance with manufacturability.
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 effectively reduces non-imaging light reflection, improving image quality and preventing ghost images, while maintaining low reflectivity across various wavelengths.
Implementation Method 1
The first microstructure has a plurality of protrusions, and an average height of the first microstructure ranges from 0.25 micrometers to 19 micrometers
Implementation Method 2
Each of the first nanostructure layer and the second nanostructure layer has a plurality of ridge-like protrusions that extend non-directionally, and an average height of each of the first nanostructure layer and the second nanostructure layer ranges from 98 nanometers to 350 nanometers
Data Source
AI summary
An imaging lens includes a lens element, a light blocking sheet, and a lens barrel accommodating the lens element and the light blocking sheet. The light blocking sheet includes a first object-side surface, a first image-side surface, a first inner ring surface, a first microstructure, and a first nanostructure layer. The first image-side surface is opposite to the first object-side surface. The first inner ring surface is located between the first object-side surface and the first image-side surface and defines a first light passage opening. The first microstructure is disposed on the first object-side surface or the first image-side surface. The first microstructure has a plurality of protrusions. The first nanostructure layer is disposed on the first inner ring surface. The first nanostructure layer has a plurality of ridge-like protrusions extending non-directionally.