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A Multimodal Wide-Field Fourier-Transform Raman Microscope

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New fourier transform all-reflection interferometer.

R A Kruger, L W Anderson, F L Roesler

|February 4, 2010

Summary

This summary is machine-generated.

This study introduces an all-reflection interferometer for spectroscopy. Its design enables vacuum ultraviolet measurements, offering a novel approach to Fourier transform spectroscopy.

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Area of Science:

Optical Physics
Spectroscopy
Interferometry

Background:

Traditional interferometers often use transmissive optics, limiting their use in certain spectral regions.
Vacuum ultraviolet (VUV) spectroscopy requires specialized instrumentation due to high absorption by air and transmissive optics.

Purpose of the Study:

To design and test an all-reflection two-beam interferometer.
To enable Fourier transform spectroscopy in the vacuum ultraviolet (VUV) region.
To present a method for obtaining spectra from interferograms generated by this instrument.

Main Methods:

The interferometer utilizes three reflecting diffraction gratings and two collimating mirrors.
All optical components are reflective, avoiding transmissive elements like beam splitters and compensation plates.
Fourier transform methods are employed for spectral analysis of the recorded interferograms.

Main Results:

The all-reflection design successfully eliminates the need for transmissive optics.
The interferometer was tested and demonstrated functionality in the visible and near-ultraviolet (2537 Å) spectral regions.
Examples of recorded interferograms and their corresponding spectra are presented.

Conclusions:

The developed all-reflection interferometer is suitable for Fourier transform spectroscopy.
Its reflective design opens possibilities for VUV spectroscopy applications.
The method for spectral retrieval from interferograms is validated.