Spectral-Spatial Imaging Device Synchronous Recording
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Solution Overview
Problem
Existing spectral imaging systems struggle to synchronously record spatial and spectral images of an object, leading to incomplete or inaccurate mapping of optical spectra to physical features, especially when the object has independent motion or is sensitive to light.
Innovation Solution
The proposed imaging system uses a beam splitter to split an optical beam into two paths, one for a spatial camera and the other for an imaging spectrograph, allowing for synchronous recording of spatial and spectral images. This system enables precise correlation of optical spectra with physical features by using a common optical beam for both paths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a conventional imaging system is replaced with an imaging spectrograph to obtain optical spectra, then spectral information is obtained, but the mapping of spectra to physical features becomes approximate and requires separate picture taking or motion control
Solution Approach 1:
The optical beam is divided into two separate paths using a beam splitter: one path directs light to a spatial camera for capturing the spatial image, while the other path directs light to an imaging spectrograph for obtaining optical spectra. This segmentation allows simultaneous acquisition of both spatial and spectral information with precise correspondence between the two datasets.
Solution Approach 2:
A beam splitter serves as an intermediary device that divides the common optical beam into two separate beams, enabling both spatial imaging and spectral analysis from the same light source without requiring separate picture taking or complex motion control systems.
2Productivity
If snapshot HSI systems are used to obtain spectra from all points in a single instant, then imaging speed is improved, but the spectrum becomes limited to fewer than thirty unequally spaced wavelengths requiring extensive computation
Solution Approach 1:
An imaging spectrograph acts as an intermediary between the optical beam and the spectral camera, providing continuous spectral dispersion with regularly spaced wavelengths. This approach maintains snapshot imaging speed while achieving superior spectral resolution and coverage compared to direct snapshot HSI systems.
Solution Approach 2:
The system replaces complex computational reconstruction methods with an optical dispersion mechanism (imaging spectrograph) that naturally produces continuously spaced wavelengths, reducing computational requirements while improving spectral measurement precision.
3Measurement precision
If motion-controlled moving platform with HSI is used to map spectra to object features, then spectral-spatial mapping is achieved, but the system complexity and requirements for controlled motion are increased
Solution Approach 1:
The beam splitter serves as a stationary intermediary that enables simultaneous spatial and spectral imaging without requiring motion control. This eliminates the need for complex moving platforms or motorized stages while maintaining precise spectral-spatial mapping through the one-to-one correspondence of pixels in both images.
Solution Approach 2:
The system merges spatial imaging and spectral analysis into a single stationary setup using a beam splitter, combining the functions of what would otherwise require separate systems with motion control into one integrated device.
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 imaging system achieves a precise and documented assignment of optical spectra to physical features, enhancing applications in materials science, biomedical research, and medical diagnostics, including retinal imaging and disease detection.
Implementation Method 1
a beam splitter of the imaging system splits an optical beam, obtained from a viewing device, into a first split beam directed by the imaging system to a spatial camera and a second split beam directed by the imaging system to the entrance slit of an imaging spectrograph
Data Source
AI summary
In general, an imaging system to synchronously record a spatial image and a spectral image of a portion of the spatial image is described. In some examples, a beam splitter of the imaging system splits an optical beam, obtained from a viewing device, into a first split beam directed by the imaging system to a spatial camera and a second split beam directed by the imaging system to the entrance slit of an imaging spectrograph that is coupled to a spectral camera. An electronic apparatus synchronously triggers the spatial camera and the spectral camera to synchronously record a spatial image and a spectral image, respectively.