Method and device for establishing spectrum
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Solution Overview
Problem
Existing spectral measurement and imaging technologies face challenges such as high hardware costs, complex operations, large size and weight, sensitivity to disturbances, and limited spectral resolution, especially in broadband applications, due to the use of chromatic dispersion, optical filtering, and interference methods.
Innovation Solution
A spectral reconstruction system utilizing a micro-nano filter with electrically-conductive film and phase-change material, such as a liquid crystal material, which includes a substrate and a cover plate, and a cover plate with a conductive film layer, and nano-structures that adjust refractive index through voltage control, allowing for flexible filtering properties and improved spectral resolution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If chromatic dispersion spectral imaging technology is used, then spectral resolution can be achieved, but the system becomes high in hardware cost, complex in operation, and large in size
Solution Approach 1:
The patent replaces the mechanical chromatic dispersion system (prism or grating) with an electro-optic modulation system using liquid crystal display (LCD) technology. The spectral filtering is achieved through voltage-controlled liquid crystal pixels that modulate light transmission based on wavelength, eliminating the need for large mechanical dispersion elements and their associated complex optics.
Solution Approach 2:
The patent changes the control parameter from physical geometry (prism angle, grating lines) to electrical voltage. By applying different voltages to liquid crystal pixels, the spectral transmission characteristics are dynamically adjusted, enabling spectral resolution without mechanical complexity. The voltage-controlled refractive index change in liquid crystals provides the wavelength-selective filtering.
2Measurement precision
If optical filter spectral imaging technology with optical filter array is used, then high spectral resolution is achieved, but the hardware cost increases and the structure becomes complex
Solution Approach 1:
The patent replaces the static optical filter array with a programmable liquid crystal display system. Instead of manufacturing and assembling multiple physical filters, the spectral filtering is achieved through software-controlled voltage patterns applied to liquid crystal pixels, dramatically simplifying manufacturing and enabling flexible reconfiguration.
Solution Approach 2:
The patent introduces dynamic control to the spectral filtering process. The liquid crystal display can be reconfigured in real-time by changing voltage patterns, allowing the same hardware to adapt to different spectral resolution requirements and applications, unlike static optical filter arrays.
3Measurement precision
If interference optical spectrometer is used, then high spectral resolution is obtained, but the system size and weight are largely increased due to precise driving mechanism
Solution Approach 1:
The patent eliminates the mechanical interferometer (Michelson or Mach-Zehnder type) and its precise moving mirror mechanism. Spectral resolution is achieved through electro-optic modulation in liquid crystal pixels, which have no moving parts. This substitution dramatically reduces system weight while maintaining spectral resolution capability.
4Loss of information
If existing spectral measurement technologies are used, then spectral information can be obtained, but the system is sensitive to disturbance and poor in stability
Solution Approach 1:
The patent replaces mechanical scanning and moving components with a static liquid crystal display system controlled by electrical signals. This eliminates sensitivity to mechanical vibrations, thermal expansion, and alignment drift, significantly improving system stability and reliability for spectral measurements.
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 system achieves high spectral resolution, reduced hardware cost, simplified operation, and miniaturization by using a single micro-nano filter to control light transmittance, enabling fast and accurate spectral reconstruction across a wide spectral range.
Implementation Method 1
The liquid crystal layer may be configured to switch at least from a first state to a second state in response to a voltage applied between the first electrode layer and the second electrode layer so that optical properties of the matrix layer can be changed
Implementation Method 2
the liquid crystal layer may be configured to switch at least from a first state to a second state in response to a voltage applied between the first electrode layer and the second electrode layer so that optical properties of the matrix layer can be changed
Implementation Method 3
A spectral reconstruction system utilizing a micro-nano filter with electrically-conductive film and phase-change material, such as a liquid crystal material, which includes a substrate and a cover plate, and a cover plate with a conductive film layer, and nano-structures that adjust refractive index through voltage control
Data Source
AI summary
A method and device for establishing a spectrum. The device comprises a light source, a micro-nano filter device and a voltage control apparatus; the micro-nano filter device comprises a cover plate and a substrate which is provided with a conductive electrode, a film layer and an electrically controlled phase-change material being located between the substrate and the cover plate; the cover plate and the substrate layer are made of a transparent material, the transparent material having a flat surface, covering a conductive film which comprises an ITO layer, and serving as an electrode of an applied external voltage; nano-structure units arrayed periodically are prepared on the conductive film, the nano-structure units arrayed periodically being made of one of a metal material, a metal oxide material or a semiconductor material.