Multi-Slit Hyperspectral Imager for Precision Gas Detection
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Solution Overview
Problem
Existing hyperspectral imagers are not optimized for gas detection and characterization, leading to less than ideal accuracy and error levels in gas tracking and measurement.
Innovation Solution
A multi-slit hyperspectral imager with parallel slits that produce multiple hyperspectral datasets for the same scene section, allowing improved measurement precision by averaging down noise through repeated measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single slit is used in a hyperspectral imager, then the device complexity is reduced, but the measurement precision for gas detection deteriorates
Solution Approach 1:
The single slit is divided into multiple parallel slits (e.g., 5-10 slits) that are evenly spaced apart. Each slit independently captures spectral data, allowing the system to segment the measurement task and aggregate results to improve precision without requiring a completely new system architecture
Solution Approach 2:
Multiple slit apertures are combined within a single imager system to process the same scene section simultaneously. The data from all slits are merged and averaged to reduce noise and improve measurement precision, achieving better gas detection accuracy while maintaining a unified system structure
2Measurement precision
If multiple slits are used to improve measurement precision, then the number of data sets increases, but the processing time and complexity increase
Solution Approach 1:
The multiple slits are configured to capture data in parallel during the same imaging pass, performing preliminary measurements simultaneously rather than sequentially. This preliminary parallel action reduces the total time required compared to sequential processing while maintaining improved precision through data aggregation
Solution Approach 2:
Each slit creates a copy of the spectral data for the same scene section, allowing independent processing and averaging. These copies enable noise reduction through statistical averaging while maintaining processing efficiency, as the copies can be handled independently and simultaneously
3Measurement precision
If each slit is limited to a specific wavelength range, then the gas detection accuracy for targeted gases improves, but the versatility for detecting different gases deteriorates
Solution Approach 1:
The spectral detection capability is segmented across multiple slits, with each slit optimized for specific wavelength ranges corresponding to different gas absorption features. This segmentation allows simultaneous optimization for multiple gas types without requiring a single slit to handle all wavelengths, thereby maintaining versatility through distributed specialization
Solution Approach 2:
The multi-slit system achieves universality by configuring different slits to detect different gases through their respective wavelength ranges. The same imager structure serves multiple detection functions, making the system universally applicable for detecting various gases of interest by simply adjusting which slits are activated or their wavelength assignments
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
Enhances the precision of gas detection and characterization by reducing noise and improving signal-to-noise ratio, resulting in more accurate gas measurements.
Implementation Method 1
at least one collimating lens through which images of said specific portion of said scene passes through after being received through at least one of said plurality of slit apertures
Implementation Method 2
at least one spectrally dispersive element through which images of said specific portion of said scene passes through after passing through said at least one collimating lens
Implementation Method 3
at least one spectrally dispersive element through which images of said specific portion of said scene passes through after passing through said at least one collimating lens
Implementation Method 4
at least one imaging system for refocusing said images of said specific portion of said scene on to a focal plane pixel array
Implementation Method 5
a plurality of pixels on said focal plane pixel array for receiving said images of said specific portion of said scene
Data Source
AI summary
Systems and methods relating to a multi-slit hyperspectral imager. The imager is configured with multiple slits that are parallel to one another. Each slit produces its own hyperspectral cube and is limited to a specific wavelength range. The multiple slits produce multiple data sets, obtained in quick succession, for the same section of an area to be imaged. In optical spectrometry applications such as trace gas sensing and quantification, this allows for improved measurement precision. The imager may be used for any gas of interest by adjusting the wavelength range to one that contains absorption features of the targeted gas.