Spectroscopic Mapping System for Ultrafast Coherent Imaging
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Solution Overview
Problem
Conventional spectroscopic imaging techniques face challenges in measuring both electronic and vibrational properties due to slow acquisition speeds, which lead to photodamage and loss of spatial correlation, especially in systems with dynamical changes at short length scales, and are susceptible to noise and external disturbances.
Innovation Solution
A spectroscopic mapping system employing a high-speed camera, fast delay scanning voice coil, and programmable controller for synchronized laser and voice coil operation, coupled with machine learning for real-time chemical property prediction, enabling ultrafast coherent imaging and parallel rapid imaging with spectroscopic mapping (PRISM) to capture millions of spectra data points per second, allowing simultaneous measurement of electronic and vibrational dynamics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If point-by-point scanning is used to measure electronic and vibrational properties, then measurement precision is improved, but acquisition speed deteriorates
Solution Approach 1:
The patent segments the measurement process into parallel spatial channels using a camera array, where each pixel independently measures electronic and vibrational properties simultaneously across the sample, replacing sequential point-by-point scanning with parallel measurements
Solution Approach 2:
The patent transitions from one-dimensional point scanning to two-dimensional parallel imaging by using a camera with multiple pixels, adding spatial parallelism to the measurement process and enabling simultaneous acquisition across the entire sample area
2Measurement precision
If acquisition time is extended to improve measurement precision, then measurement precision is improved, but photodamage to specimen increases
Solution Approach 1:
The patent enables continuous simultaneous measurement of electronic and vibrational properties across the entire sample without interruption or sequential delays, maintaining continuous useful action while minimizing total exposure time through parallel acquisition
Solution Approach 2:
The patent rushes through the measurement process by performing parallel measurements across all spatial points simultaneously, skipping the sequential time required for point-by-point scanning and reducing total exposure time to minimize photodamage
3Measurement precision
If point-by-point scanning is used, then measurement precision is improved, but susceptibility to external disturbances and noise increases
Solution Approach 1:
The patent merges multiple independent pixel measurements into a single simultaneous capture, combining the advantages of multiple measurements while eliminating the temporal vulnerabilities associated with sequential scanning by acquiring all data points at the same moment
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
Achieves fast and wide-field imaging with improved resolution, capturing both fast and slow dynamics, and enables real-time analysis of material properties, including intermolecular interactions, with enhanced signal-to-noise ratio and accurate correlation mapping, suitable for diverse applications from material screening to live cell monitoring.
Implementation Method 1
the pump emission exciting all frequencies in a sample
Implementation Method 2
coherent pump-probe microscopy
Implementation Method 3
stimulated Raman scattering spectroscopy
Data Source
AI summary
A spectroscopic mapping system and method are provided. In a further aspect, a system includes at least one laser, a high speed camera, a fast delay scanning voice coil for imaging, and a programmable controller configured to synchronize the laser(s), camera and voice coil. Another aspect employs a tracer laser beam or pulse, and a pump-probe laser beam or pulse, the pump emission exciting all frequencies in a sample while the probe emission (via a voice coil) vibrates the sample at different points in time. Yet another aspect uses parallel rapid imaging with spectroscopic mapping to conduct ultrafast coherent imaging. In still another aspect, the present system and method include machine learning software instructions to predict chemical properties based on their chemical compositions, using optical spectroscopic data.