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IR Spectrometers

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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...

$Interference and Diffraction$ 02:18

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IR Spectroscopy: Hooke's Law Approximation of Molecular Vibration

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Shear Diagram

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Digital Inline Holographic Microscopy (DIHM) of Weakly-scattering Subjects

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Holographic radial shear interferometer.

J C Fouéré, D Malacara

|February 6, 2010

Summary

A novel radial shear interferometer utilizing Gabor zone plates offers a stable and easily constructed solution for optical testing applications. This new design provides a valuable tool for precise optical measurements and evaluations.

Area of Science:

Optics and Optical Engineering
Interferometry
Diffractive Optics

Background:

Radial shear interferometers are crucial for optical testing, measuring wavefront aberrations.
Traditional designs can be complex or lack stability.
Gabor zone plates offer unique imaging properties with potential for interferometric applications.

Purpose of the Study:

To introduce a new radial shear interferometer design.
To leverage the imaging capabilities of Gabor zone plates for interferometry.
To demonstrate a stable and easily constructible interferometer for optical testing.

Main Methods:

Development of a radial shear interferometer.
Utilizing the imaging properties of Gabor zone plates as a key component.

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Experimental setup and testing of the interferometer's performance.

Main Results:

The described interferometer is stable.
The interferometer is easily constructed.
The instrument proves useful in optical testing.

Conclusions:

A novel radial shear interferometer based on Gabor zone plates has been successfully developed.
The design offers advantages in terms of stability and ease of construction.
This interferometer is a practical and valuable instrument for various optical testing scenarios.