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There are two main infrared (IR) spectrophotometers: dispersive IR spectrometers and Fourier transform infrared (FTIR) spectrometers. In a dispersive IR spectrometer, a beam of infrared radiation produced by a hot wire is divided into two parallel equal-intensity beams using mirrors. One beam passes through the sample, while another is a reference beam. The beams then move through the monochromator, which separates the radiations into a continuous spectrum of different frequencies. The...

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The spherical mirror fabry-perot interferometer.

|January 14, 2010

Summary

This summary is machine-generated.

This study details the confocal spherical mirror Fabry-Perot interferometer (FPS), optimizing its performance for spectroscopy. It covers design, alignment, and presents two versatile instruments for advanced optical analysis.

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Area of Science:

Optics and Photonics
Interferometry
Spectroscopy

Background:

The Fabry-Perot interferometer is a key optical instrument.
Confocal spherical mirror configurations offer unique advantages.
Detailed understanding of design parameters is crucial for performance.

Purpose of the Study:

To provide a comprehensive description of the theory, design, and use of the confocal spherical mirror Fabry-Perot interferometer (FPS).
To analyze performance for minor deviations in mirror separation.
To optimize the product of resolution and light-gathering power.

Main Methods:

Theoretical analysis of the confocal spherical mirror Fabry-Perot interferometer.
Investigation of factors limiting finesse.
Discussion of mode matching and alignment procedures.
Design and construction of two specific FPS instruments.

Main Results:

Detailed performance analysis for small departures from confocal configuration.
Optimization strategies for the (resolution) x (light gathering power) product.
Identification of factors limiting achievable finesse.
Description of two functional instruments: a piezo-electrically scanned spectrum analyzer and a fixed-spacing etalon.

Conclusions:

The confocal spherical mirror Fabry-Perot interferometer (FPS) is a versatile tool for high-resolution optical measurements.
Optimized design and careful alignment are critical for maximizing performance.
The described instruments demonstrate practical applications in spectroscopy and optical analysis.