Wideband Hyperspectral Spectrophotometer UV Fluorescence Analysis
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Solution Overview
Problem
Existing hyperspectral imaging techniques are limited to imaging objects that spontaneously emit light, failing to characterize objects that do not emit light on their own.
Innovation Solution
A broadband hyperspectral spectrophotometer with a movable emission source and plane mirror system scans objects line by line, using ultraviolet and visible illumination to induce fluorescence, and employs a compensating lens and multiple folding mirrors to correct aberrations and maintain spatial resolution across a wide spectral range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single monochromator is used to scan through the spectral range, then the device complexity is reduced, but the measurement time increases significantly and productivity decreases
Solution Approach 1:
The spectral range is divided into multiple discrete wavelength bands, with each band handled by a dedicated detection channel. This segmentation allows parallel measurement of different spectral regions simultaneously, eliminating the need for sequential scanning and thus improving productivity while maintaining manageable device complexity.
Solution Approach 2:
The patent transitions from a one-dimensional sequential scanning approach to a two-dimensional parallel detection architecture. Multiple detection channels operate simultaneously at different wavelength regions, effectively adding a temporal dimension to the measurement process and enabling rapid wideband spectral acquisition.
2Productivity
If multiple detection channels with separate monochromators are used for parallel detection, then productivity and measurement speed improve, but device complexity and cost increase
Solution Approach 1:
A single monochromator is designed to serve multiple functions by sequentially directing different wavelength bands to different detection channels. This multi-functional design enables parallel detection capability without requiring separate monochromators for each channel, thus improving productivity while controlling device complexity.
Solution Approach 2:
The monochromator is dynamically configured to switch between different wavelength bands for different detection channels. This dynamic operation allows one monochromator to effectively replace multiple static monochromators, achieving parallel detection capability with reduced device complexity.
3Ease of operation
If conventional spectrophotometers are used for art authentication, then the measurement process is simple, but the identification of forgery is time-consuming and requires extensive expert analysis
Solution Approach 1:
The system introduces an intermediary processing layer that automatically analyzes wideband spectral data and generates objective authentication results. This intermediary computational analysis reduces the time required for expert evaluation while maintaining ease of operation, as the system handles the complex analysis automatically.
Solution Approach 2:
The patent replaces the manual expert analysis process with an automated computational system that processes spectral data. This substitution eliminates the time-consuming human analysis step while keeping the system easy to operate through automated workflows and algorithmic decision-making.
4Measurement precision
If wideband detection is implemented to capture full spectral information, then measurement precision and material identification improve, but device complexity increases due to multiple monochromators
Solution Approach 1:
The wideband spectral range is segmented into multiple detection channels, each optimized for specific wavelength regions. This segmentation enables comprehensive spectral coverage with improved measurement precision while avoiding the complexity of a single overly complex monochromator system.
Solution Approach 2:
The system achieves wideband detection by adding a channel dimension rather than expanding a single monochromator's complexity. Multiple detection channels operate in parallel, each handling specific spectral regions, thereby achieving comprehensive spectral information with manageable device complexity.
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
Enables non-destructive characterization of non-emitting objects by acquiring a hyperspectral image with high spatial resolution and UV-to-visible wavelength coverage, instantaneously reconstructing a matrix image through simple rotation.
Implementation Method 1
a monochromator for receiving incident light and for being tuned to a selected wavelength band within a visible spectral range
Implementation Method 2
a detector coupled to the monochromator for detecting light within the selected wavelength band
Implementation Method 3
Wideband hyperspectral spectrophotometer for analysing an object in the fluorescent domain
Data Source
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AI summary
The invention relates to a wideband hyperspectral spectrophotometer suitable for analysing an object (0), comprising: an illuminating assembly (S) comprising at least one source (Si) for emitting a light beam having a wavelength belonging to the ultra-violet domain in the direction of an object (0) to be analysed, said assembly (S) furthermore being configured to scan line by line the object (0) to be analysed by means of the emitting source (Si); a spherical focusing mirror (M2); a first redirecting mirror (M1) comprising a front face (M11) oriented toward the spherical focusing mirror (M2), said first face (M11) having a metal coating, the first mirror (M1) furthermore having a back face (M12) opposite the first front face (M11), said back face (M12) also comprising a metal coating, said first focusing mirror (M1) comprising in its centre a slit (F) configured to let pass a line of the beam emitted by the object (0); the first redirecting mirror (M1), the spherical focusing mirror (M2) and the slit (F) being arranged so that a fluorescent beam emitted by the object (0) after absorption by the object of the ultraviolet beam originating from the illuminating assembly is reflected from the first face (M11) of the first mirror (M1) toward the focusing mirror (M2), said focusing mirror (M2) then reflecting the beam thus focused toward the slit (F).