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Updated: Jun 16, 2026
08:23
A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings
Published on: September 30, 2019
Summary
The Michelson interferometer measures the separation of distant parallel surfaces using reflected light. This study details three measurements and discusses the impact of optical dispersion on accuracy.
Area of Science:
- Optics and Photonics
- Metrology
Background:
- The Michelson interferometer is a versatile optical instrument.
- Precise measurement of distances is crucial in various scientific and engineering fields.
Purpose of the Study:
- To demonstrate the application of Michelson interferometry for measuring the separation of distant parallel surfaces.
- To analyze the influence of optical dispersion on measurement accuracy.
Main Methods:
- Utilizing a Michelson interferometer with a light beam incident normally to the surfaces.
- Ensuring partial reflection from each surface back to the interferometer.
- Conducting three distinct measurement trials.
Main Results:
- Successful measurement of separation between distant parallel surfaces.
- Quantification of the impact of dispersion on the interferometric measurements.
- Validation of the technique's feasibility under specific conditions.
Conclusions:
- The Michelson interferometer is effective for measuring separations of distant parallel surfaces.
- Optical dispersion must be considered for accurate results.
- The technique provides a viable method for metrology applications.
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