Hyperspectral Imaging Optical System Spatial Distortion Matching
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Solution Overview
Problem
Hyperspectral imaging sensors with spectrometers operating over different spectral bands face insufficient spectral purity due to significant magnification and spatial distortion differences between systems, limiting the reliability of combined spectral band data processing.
Innovation Solution
Designing hyperspectral imaging optical systems with spectrometers that have matched spatial distortion characteristics, achieved by varying optical elements' radii of curvature, thickness, and refractive index, to minimize differences in distortion between systems, ensuring spectral purity and fidelity across combined spectral bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If individual keystone distortions are corrected within each spectral band, then each spectrometer provides accurate data within its own band, but the magnification and spatial distortion differences between spectrometers exceed pixel levels, reducing spectral purity for combined band processing
Solution Approach 1:
The patent applies parameter changes by systematically varying optical design parameters including radii of curvature, thickness, and refractive index of optical elements to achieve matched spatial distortion characteristics between spectrometers operating at different spectral bands, thereby enabling reliable co-registered hyperspectral imaging across combined spectral bands
2Adaptability or versatility
If spectrometers operate over different spectral bands with individual distortion correction, then each band can be processed independently, but the spatial distortion differences between bands exceed pixel levels, limiting combined spectral analysis
Solution Approach 1:
The patent employs parameter changes by adjusting optical design variables such as radii of curvature, thickness, and refractive index to achieve matched spatial distortion characteristics across different spectral bands, enabling both broad spectral coverage and precise distortion matching
Solution Approach 2:
The patent implements universality by designing optical systems where multiple spectrometers operating over different spectral bands share common optical paths and exhibit matched spatial distortion characteristics, allowing the system to function effectively across multiple spectral bands with unified processing
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
This approach enhances the spectral fidelity and target discrimination capabilities of hyperspectral imaging sensors by maintaining spectral purity within a fraction of a pixel, enabling reliable data processing across combined spectral bands.
Implementation Method 1
varying optical elements' radii of curvature, thickness, and refractive index
Data Source
AI summary
An imaging optical system including a plurality of imaging optical sub-systems, each having at least one optical element and receiving light from a source, and a plurality of spectrometer optical sub-systems, each spectrometer optical sub-system receiving light from at least one of the imaging optical sub-systems, each imaging optical sub-system and spectrometer optical sub-system combination having a spatial distortion characteristic, each spatial distortion characteristic having a predetermined relationship to the other spatial distortion characteristics.