Prism coupling refractometry: enhancing precision, accuracy, and repeatability in the infrared

Andrew Howe; Brianna Ellsworth; Kathleen A Richardson; Romain Gaume

doi:10.1117/12.3001591

29 November 2023 Prism coupling refractometry: enhancing precision, accuracy, and repeatability in the infrared

Andrew Howe, Brianna Ellsworth, Kathleen A Richardson, Romain Gaume

Proceedings Volume 12778, Optifab 2023; 127780X (2023) https://doi.org/10.1117/12.3001591
Event: SPIE Optifab, 2023, Rochester, New York, United States

Abstract

Prism coupling refractometry is an often-overlooked refractive index measurement technique. It is significantly different from other common refractometry techniques, as it does not require the complex geometry and costly sample fabrication associated with the minimum deviation method or interferometry, nor any assumptions about the material properties as in spectroscopic ellipsometry. Lastly, with proper calibration, it can be used to measure the index to the third or even fourth decimal place, out-performing most Kramers-Krönig-based methods. Here, we report on the design, construction, operating procedure, and data analysis for an infrared prism coupling refractometer and its implications on both work in the lab and as a common device for optical shop testing.

Conference Presentation

Citation Download Citation

Andrew Howe, Brianna Ellsworth, Kathleen A Richardson, and Romain Gaume "Prism coupling refractometry: enhancing precision, accuracy, and repeatability in the infrared", Proc. SPIE 12778, Optifab 2023, 127780X (29 November 2023); https://doi.org/10.1117/12.3001591

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