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High Speed Sub-GHz Spectrometer for Brillouin Scattering Analysis

High Speed Sub-GHz Spectrometer for Brillouin Scattering Analysis

Published on: December 22, 2015

Broadband light source shearing interferometer using Savart plate and angular scanning technique.

Shyh-Tsong Lin¹, Sheng-Lih Yeh, Minh-Han Hxieh

¹Department of Electro-optical Engineering, National Taipei University of Technology, 1, Sec.3, Chung-Hsiao East Road, Taipei 10608, Taiwan. f10402@ntut.edu.tw

|June 5, 2012

Summary

This summary is machine-generated.

This study introduces a novel shearing interferometer for precise slope contour measurements. The method utilizes a Savart plate and angular scanning to analyze surface topography effectively.

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Area of Science:

Optical Metrology
Interferometry
Surface Analysis

Background:

Accurate surface slope measurement is crucial for various scientific and engineering applications.
Traditional interferometry methods can be complex or limited in scope.

Purpose of the Study:

To propose and validate a novel shearing interferometer for slope contour measurements.
To demonstrate the feasibility of using a broadband light source, Savart plate, and angular scanning.

Main Methods:

A shearing interferometer was designed using a broadband light source and a Savart plate.
The Savart plate laterally displaces wavefronts reflected from the surface.
Slope contours were determined by analyzing fringe shifts during angular scanning of the Savart plate.

Main Results:

An experimental setup was constructed and tested.
The experimental results confirmed the validity and feasibility of the proposed interferometer.
The technique successfully measured slope contours of the detected surface.

Conclusions:

The developed shearing interferometer offers a viable method for surface slope contour measurement.
The combination of a Savart plate and angular scanning provides an effective approach.
This technique has potential applications in surface characterization and metrology.