In making wavelength determinations to the accuracy of one-thousandth of an Angstrom with a Fabry and Perot Etalon it is necessary to know the wavelength of the line to one-tenth of an Angstrom, the thickness of the etalon and the change of phase on reflection of the light from the interfaces of the etalon. This change of phase is a function of the wavelength, varies with the metal, the way it is deposited and with the surface upon which it is deposited. A separate determination must be made for each etalon. This change of phase is usually expressed as a correction applied to the wave length determination.
Proceedings of the Iowa Academy of Science
©1930 Iowa Academy of Science, Inc.
Collins, E. Hobart
"The Change of Phase on Reflection of Light from the Silvered Interfaces of an Etalon,"
Proceedings of the Iowa Academy of Science, 37(1), 297-298.
Available at: https://scholarworks.uni.edu/pias/vol37/iss1/71