A Rapid-Scan Spectrometer for Scanning 2000 A-15 microm in 3 sec

Area of Science:

• Spectroscopy
• Optical Engineering
• Analytical Chemistry

Background:

• Traditional spectrometers often have limitations in scanning speed and spectral range coverage.
• The need for rapid and versatile spectroscopic analysis is crucial in various scientific fields.

Purpose of the Study:

• To develop and characterize a novel spectrometer with enhanced scanning speed and broad spectral coverage.
• To enable simultaneous measurement of absorption and emission spectra for diverse sample types.

Main Methods:

• A spectrometer was constructed utilizing four plane reflectance gratings and six detectors.
• A double-pass grating monochromator with a sweeping mirror system facilitates spectral scanning.
• A stepper-motor-driven turret automatically selects gratings, filters, and detectors for seamless operation.

Main Results:

• The spectrometer achieves a full spectral scan from 2000 Å to 15 µm in 3 seconds.
• Sub-ranges can be scanned at rates up to 160 times per second.
• Measured resolution is better than 6 Å at 3125 Å and 0.011 µm at 3.3 µm.

Conclusions:

• The developed spectrometer offers a significant advancement in speed and versatility for spectroscopic measurements.
• Its capability to alternate between absorption and emission spectra enhances its utility for analyzing hot samples.
• The instrument provides high resolution across a wide spectral range, suitable for demanding analytical applications.