Open Access Paper
16 August 2017 An improved Michelson interferometer: smoothing out the rough spots for a more effective teaching tool
Clarke K. Eastman
Author Affiliations +
Proceedings Volume 10452, 14th Conference on Education and Training in Optics and Photonics: ETOP 2017; 104521H (2017) https://doi.org/10.1117/12.2269663
Event: 14th Conference on Education and Training in Optics and Photonics, ETOP 2017, 2017, Hangzhou, China
Abstract
The Michelson interferometer is a classic tool for demonstrating the wave nature of light, and it is a cornerstone of the optics curriculum. But many students’ experiences with this device are higher in frustration than they are in learning. That situation motivated an effort to make aligning the tool less a test of a visual acuity and patience, and more of an introduction to optics phenomena and optical engineering. Key improvements included an added beam-splitter to accommodate multiple observers, a modified telescope to quickly and reliably obtain parallel mirrors, and a series of increasing spectral-width light sources to obtain equal path lengths. This greatly improved students’ chances of success, as defined by achieving “white light fringes”. When presenting these new features to the students, high importance is placed on understanding why alignment was so difficult with the original design, and why the changes made alignment easier. By exposing the rationale behind the improvements, students can observe the process of problem-solving in an optical engineering scenario. Equally important is the demonstration that solutions can be devised or adapted based on the parts at hand, and that implementations only achieve a highly “polished’ state after several design iterations.
© (2017) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Clarke K. Eastman "An improved Michelson interferometer: smoothing out the rough spots for a more effective teaching tool", Proc. SPIE 10452, 14th Conference on Education and Training in Optics and Photonics: ETOP 2017, 104521H (16 August 2017); https://doi.org/10.1117/12.2269663
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KEYWORDS
Michelson interferometers

Optical engineering

Beam splitters

Interferometers

Light sources

Mirrors

Polishing

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