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Updated: Jun 17, 2026
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Rapid Scan Electron Paramagnetic Resonance Opens New Avenues for Imaging Physiologically Important Parameters In Vivo
Published on: September 26, 2016
A rapid-scan spectrometer that sweeps corner mirrors through the spectrum.
S A Dolin1, H A Kruegle, G J Penzias
1The Warner & Swasey Company, Control Instrument Division, 32-16 Downing Street, Flushing, NY 11354, USA.
Applied Optics
|January 9, 2010
Summary
A novel grating spectrometer design enables rapid spectral scanning at 800 scans/sec without compromising optical quality. This advancement is limited only by detector signal-to-noise ratio, not the scanning method.
Area of Science:
- Spectroscopy
- Optical Engineering
- Instrumentation
Background:
- Traditional grating spectrometers face limitations in scanning speed.
- Rapid spectral acquisition is crucial for dynamic process monitoring.
Purpose of the Study:
- To develop a rapid-scanning grating spectrometer without optical quality loss.
- To achieve high scan rates for improved spectral analysis.
Main Methods:
- Implemented a design using a sequence of corner mirrors swept through an intermediate focal plane.
- Utilized a rotating scan wheel with 24 corner mirrors in a double-pass Czerny-Turner monochromator.
- Integrated features for linear time/wavelength readout and broad foreoptic focus.
Main Results:
- Achieved a scan rate of 800 spectra per second, with individual scans completed in 1 msec.
- Demonstrated that performance is limited by detector signal-to-noise ratio, not the optical scanning technique.
- Instrument covers the spectral region from 2500 Å to 9 µm with interchangeable gratings and detectors.
Conclusions:
- The corner mirror sweeping technique effectively enables high-speed spectral scanning.
- The developed instrument offers high performance and versatility for various spectroscopic applications.
- This method overcomes previous limitations in rapid spectral acquisition for grating spectrometers.
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