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Updated: Jun 20, 2026
06:48
A Multimodal Wide-Field Fourier-Transform Raman Microscope
Published on: December 30, 2025
Simultaneous measurement of spectra at multiple ranges using a single spectrometer
Barry Lienert1, John Porter, Shiv K Sharma
1Hawaii Institute of Geophysics and Planetology, University of Hawaii, 2525 Correa Road, Honolulu, Hawaii 96822, USA. lienert@soest.hawaii.edu
Applied Optics
|August 22, 2009
Summary
This study introduces a novel instrument for real-time spectral analysis at multiple distances simultaneously. The system uses optical fibers and a spectrometer to compare spectra from different ranges, enabling rapid, simultaneous spectral measurements.
Area of Science:
- Spectroscopy
- Optical Engineering
- Analytical Chemistry
Background:
- Traditional spectral analysis can be time-consuming and lacks real-time multi-range capabilities.
- Simultaneous spectral measurements at varying distances are crucial for applications like environmental monitoring and material analysis.
Purpose of the Study:
- To design and build an innovative instrument for simultaneous, real-time spectral measurements at multiple ranges.
- To demonstrate the feasibility of this technique for practical applications.
Main Methods:
- An instrument was developed utilizing an excitation laser beam offset from collection optics, with range-dependent image displacement.
- Multiple optical fibers collected light from different ranges, feeding into a spectrometer with a 2D detector array.
- Spectra from various ranges were displayed simultaneously on different rows of the detector array.
Main Results:
- A prototype instrument successfully measured spectra from 3 to 13 meters in real time.
- Testing with fluorescent dyes confirmed the system's ability to differentiate spectral signatures at different ranges.
- Numerical simulations suggest the technique's scalability to longer ranges.
Conclusions:
- The developed instrument provides simultaneous, real-time spectral analysis across multiple ranges.
- This technology offers a significant advancement for applications requiring rapid, spatially resolved spectral data.
- The system shows promise for extension to more complex and longer-range sensing applications.
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