Ribbon Element Spectrum Measuring Device for Stable Near-Infrared Analysis
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Solution Overview
Problem
There is a need for compact and efficient spectroscopic devices capable of performing non-destructive inspections using near-infrared light, particularly in outdoor situations, where existing devices struggle with stability and accuracy in measuring light intensity across various wavelengths.
Innovation Solution
A spectrum measuring device incorporating a ribbon element with movable and fixed reflection surfaces, driven by a piezoelectric method, which changes the ribbon depth to alter diffraction efficiency and wavelength dispersion, coupled with a light detection element and controller to acquire and process light quantity data, enabling stable spectrum measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a compact spectrometer is developed for near-infrared light, then portability and on-site measurement capability are improved, but measurement stability and accuracy deteriorate
Solution Approach 1:
The patent employs a dynamic diffraction grating structure where the ribbon element can change its depth position to adjust diffraction efficiency. This dynamic adjustment capability allows the compact spectrometer to optimize its performance for different measurement conditions, thereby maintaining measurement stability despite the reduced size. The ribbon element's ability to move between different depth positions enables real-time adaptation to compensate for the limitations imposed by the compact form factor.
2Volume of moving object
If a compact spectrometer is developed for near-infrared light, then portability and on-site measurement capability are improved, but measurement accuracy deteriorates
Solution Approach 1:
The patent utilizes parameter changes by adjusting the depth position of the ribbon element to optimize diffraction efficiency for near-infrared light. By dynamically changing the physical parameter (ribbon depth) in response to measurement requirements, the compact spectrometer achieves improved light intensity measurement accuracy despite its small size. The system can adjust the ribbon depth to match the specific wavelength range being measured, thereby maintaining precision across different near-infrared bands.
3Measurement precision
If complex components like deflection mirrors are used, then measurement accuracy is improved, but device complexity and cost increase
Solution Approach 1:
The patent extracts and eliminates the need for complex deflection mirror systems by utilizing a simplified optical path where the ribbon element directly diffracts light without requiring additional deflecting components. This extraction of unnecessary complex components reduces device complexity and cost while maintaining measurement accuracy through the efficient use of the diffraction grating's depth-adjustment capability to achieve the necessary light path control.
Solution Approach 2:
The patent replaces the mechanical deflection mirror system with a diffraction-based optical path control mechanism. Instead of using mechanically complex mirrors to redirect and focus light, the system uses the diffraction properties of the ribbon element, controlled by electrical actuation of the ribbon depth. This substitution eliminates bulky mechanical components while achieving the same optical path manipulation function, thereby reducing device complexity and cost.
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 device achieves stable and accurate spectrum measurement with increased signal-to-noise ratio, reducing the need for complex components like deflection mirrors and simplifying the configuration, while maintaining cost-effectiveness and operational efficiency.
Implementation Method 1
a piezoelectric body that translates a movable ribbon in an optical axis direction when a drive signal is applied
Implementation Method 2
a spectrum measuring device including a ribbon element... configured to disperse incident light into spectral components in a wavelength direction
Data Source
AI summary
A spectrum measuring device including a ribbon element, a light detection element, and circuitry. The ribbon element includes a first light reflector including a plurality of first light reflection surfaces configured to be translated in an out-of-plane direction, and a second light reflector including a plurality of second light reflection surfaces that are fixed. The circuitry supplies a drive signal to the ribbon element in such a manner that a change of a displacement amount difference between the first light reflection surfaces and the second light reflection surfaces corresponds to a predetermined frequency; and acquires the light quantity data detected by the light detection element at a predetermined sampling frequency.