Light Filter Spectrometer Using Variable-Thickness Liquid Modulation
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Solution Overview
Problem
Existing small spectrometers face difficulties in implementing high-resolution spectroscopy due to challenges in forming precise and uniform spectrum modulation layers with varying thicknesses, leading to inefficiencies in light transmission and scattering.
Innovation Solution
A spectrometer design incorporating a light filter with a liquid spectrum modulation layer having varying thicknesses and transmittance spectra, utilizing a filter frame made of optically transparent materials like glass or polymer, and filled with a light absorption modulation material such as quantum dots, inorganic materials, or polymers, to achieve precise and non-linear transmittance spectra.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a grating structure is used for spectroscopy in a small spectrometer, then spectral analysis capability is provided, but it is difficult to implement due to size constraints and manufacturing complexity
Solution Approach 1:
The patent changes the fundamental parameter of spectral analysis from grating-based diffraction to filter-based wavelength selection. By using a liquid spectrum modulation layer with spatially varying thickness, the system achieves spectral analysis through absorption characteristics rather than diffraction, simplifying the device structure while maintaining measurement precision
Solution Approach 2:
The patent replaces the mechanical grating structure with a liquid filter system. Instead of using physical diffraction gratings that require precise mechanical alignment and have complex manufacturing requirements, the invention uses a liquid spectrum modulation layer that can be pumped to change its optical properties, substituting mechanical complexity with fluid control
2Stability of the object's composition
If a solid spectrum modulation layer is used, then structural stability is achieved, but it is difficult to form precise and uniform layers with varying thicknesses
Solution Approach 1:
The patent uses a liquid spectrum modulation layer instead of a solid layer, leveraging the fluid properties to achieve precise thickness control. The liquid can be pumped and circulated to uniformly coat the filtering element, ensuring consistent thickness across the surface while maintaining the ability to vary thickness at different spatial locations for spectral modulation
Solution Approach 2:
The patent changes the physical state of the spectrum modulation material from solid to liquid. This parameter change enables precise thickness control through fluid dynamics and pumping mechanisms, while the liquid state allows for easier formation of uniform layers with varying thicknesses compared to solid materials
3Measurement precision
If the liquid spectrum modulation layer has varying thicknesses for different transmittance spectra, then spectral resolution is improved, but light scattering and reflection increase
Solution Approach 1:
The patent addresses light scattering and reflection by using a liquid spectrum modulation layer that can be optimized to minimize these effects. The liquid medium allows for controlled interaction with light, reducing unwanted scattering and reflection while maintaining the varying thickness profile needed for high spectral resolution. The anti-reflection layer further converts potential harmful reflections into transmitted light
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 design enables high-resolution spectrometry with a resolution of less than or equal to 1 nm by adjusting the thickness of the liquid spectrum modulation layer, reducing scattering, and enhancing optical characteristics.
Implementation Method 1
the liquid spectrum modulation layer comprises a solution comprising a light absorption modulation material
Data Source
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AI summary
Provided are a light filter (100) and a spectrometer including the light filter. The light filter includes at least one filter, wherein the at least one filter includes a liquid spectrum modulation layer (122) having different transmittance spectra according to different positions on the at least one filter. The liquid spectrum modulation layer has different thicknesses according to the different positions on the at least one filter.