Colloidal Amorphous Optical Filter for Infrared Transmission
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional infrared-transmissive filters have low infrared regular transmittance, leading to blurred motion capture images and high costs due to the use of dielectric multi-layer films, and they lack design quality with a black color appearance.
Innovation Solution
An optical filter with a colloidal amorphous array structure, comprising a matrix and fine particles, providing high infrared regular transmittance and a white color appearance, achieved through the use of a curable resin composition with dispersed fine particles, which are thermally stable and have a specific refractive index difference, allowing for improved infrared transmission and design quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a dielectric multi-layer film is used to achieve infrared transmittance, then infrared transmission is improved, but manufacturing cost increases and design quality deteriorates due to black color appearance
Solution Approach 1:
The patent changes the structural parameters of the filter by using a resin layer with dispersed fine particles instead of a dielectric multi-layer film. This structural parameter change enables the filter to achieve high infrared transmittance while having a white appearance, thereby reducing manufacturing cost and improving design quality
Solution Approach 2:
The patent employs a composite material structure consisting of a resin layer containing dispersed fine particles. This composite structure provides both the required infrared transmittance and the desired white appearance, replacing the expensive dielectric multi-layer film while maintaining optical performance
2Use of energy by moving object
If a dielectric multi-layer film is used to achieve infrared transmittance, then infrared transmission is improved, but manufacturing cost increases
Solution Approach 1:
The patent simplifies the manufacturing process by changing from a complex dielectric multi-layer film deposition process to a simpler resin coating and curing process with dispersed particles, reducing manufacturing complexity while maintaining infrared transmittance
Solution Approach 2:
The patent uses a cost-effective resin-based filter structure that is simpler to manufacture and potentially replaceable, reducing both manufacturing complexity and cost compared to precision dielectric multi-layer films
3Measurement precision
If the infrared filter has high infrared regular transmittance, then motion capture clarity is improved, but achieving white color appearance becomes more difficult
Solution Approach 1:
The patent uses a composite material system where dispersed fine particles in a resin matrix simultaneously provide the optical properties needed for high infrared transmittance (for motion capture clarity) and white light scattering (for white color appearance), achieving both requirements together
Solution Approach 2:
The patent applies local quality by having the resin layer with dispersed particles provide different optical functions: the particle dispersion provides white appearance through visible light scattering, while the resin matrix maintains infrared transmittance for clear motion capture
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 optical filter achieves high infrared regular transmittance, thermal stability, and a white color appearance, enhancing motion capture clarity and design quality while reducing costs compared to traditional filters.
Implementation Method 1
the optical filter has a regular transmittance of 60% or higher for light having a wavelength in at least a part of a wavelength range not shorter than 760 nm and not longer than 2000 nm
Implementation Method 2
the optical filter generally exhibits a white color
Implementation Method 3
a curable resin composition with dispersed fine particles
Implementation Method 4
the optical filter is contracted by being heated at a temperature of 85° C. or higher
Data Source
AI summary
This optical filter 10 has an L* of at least 20 as measured by the SCE method, wherein the linear transmittance is at least 60% with respect to light the wavelength of which falls at least partially within the wavelength range of 760 nm-2,000 nm, and the temperature, at which the optical filter contracts by being heated, is at least 85° C.