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A Multimodal Wide-Field Fourier-Transform Raman Microscope

A Multimodal Wide-Field Fourier-Transform Raman Microscope

Published on: December 30, 2025

Highly achromatic Fourier-transform spectrometer.

David G Winters, Philip Schlup, Randy A Bartels

|June 18, 2009

Summary

We developed a simplified all-reflective Fourier transform spectrometer for broad spectral range measurements. This device is ideal for broadband laser-like light, offering high resolution based on beam characteristics.

Area of Science:

Optical engineering
Spectroscopy
Instrumentation

Background:

Fourier transform spectrometers (FTS) are crucial for spectral analysis.
Existing FTS designs can be complex and limited in spectral range.
Broadband, spatially coherent sources require specialized spectroscopic tools.

Purpose of the Study:

To present a simplified all-reflective Fourier transform spectrometer (FTS).
To demonstrate its utility over a broad spectral range (near-UV to mid-IR).
To evaluate its performance with spatially coherent, broadband sources.

Main Methods:

Designed an all-reflective FTS utilizing a split-mirror configuration.
Employed a simplified optical path for enhanced robustness.

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Conducted theoretical and experimental investigations of error sources.

Main Results:

Achieved spectral measurements spanning 4.6 octaves, from near-UV to mid-IR.
Demonstrated suitability for broadband laser-like light sources.
Resolution was found to be limited by beam size and collimation.

Conclusions:

The simplified all-reflective FTS is effective for broad spectral measurements.
The split-mirror design offers a versatile platform for various light sources.
Further characterization confirmed its potential for accurate spectral analysis.