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A wide range, rapid scanning spectrometer for emission and absorption measurements
Applied Optics
|January 14, 2010
Summary
A novel spectrometer achieves high speed and resolution across a wide spectral range. This fast scanning spectrometer is suitable for absorption spectroscopy and emission measurements.
Area of Science:
- Spectroscopy
- Optical Engineering
Background:
- Developing advanced spectroscopic instruments is crucial for scientific advancement.
- Existing spectrometers often face limitations in speed, spectral range, or resolving power.
Purpose of the Study:
- To develop a new spectrometer with a wide spectral range and high scanning speed.
- To achieve good resolving power in conjunction with high-speed spectral acquisition.
Main Methods:
- Designed an asymmetrical Czerny-Turner spectrometer with a grating at the center of curvature.
- Incorporated a six-sided, air turbine-driven mirror for rapid spectral scanning (70 microseconds for 0-1.2 micrometers).
- Utilized a high-intensity, pulsed flash tube as a light source for absorption spectroscopy.
Main Results:
- Achieved a theoretical resolving power of 14,000 in first order with an 1180-lines/mm grating.
- The spectrometer scans the 0-1.2 micrometer spectrum in approximately 70 microseconds.
- Demonstrated applicability to both emission and absorption measurements.
Conclusions:
- The developed spectrometer offers a unique combination of wide spectral range, high speed, and good resolution.
- Potential challenges in recording due to spectral response variations were identified, with suggested solutions.
- The instrument shows promise for various spectroscopic applications, including absorption and emission studies.
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