Interferometric measurement of refractive index

D. J. McKee, J. F H Nicholls, I. S. Ruddock

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)


In this paper a simple method is described for measuring the principal refractive indices of crystals using a Michelson interferometer and a single principal section of the material. This work formed the basis of the final year BSc project in laser physics and optoelectronics for one of the authors. The refractive indices of a sapphire crystal obtained by this technique are accurate to the third decimal place. The procedure is then used to obtain the three principal refractive indices of a new biaxial crystal, potassium niobium borate, whose refractive indices were previously unknown.

Original languageEnglish
Article number007
Pages (from-to)127-134
Number of pages8
JournalEuropean Journal of Physics
Issue number3
Publication statusPublished - 1 Dec 1995


  • interferometric measurement
  • refractive index
  • Michelson interferometer


Dive into the research topics of 'Interferometric measurement of refractive index'. Together they form a unique fingerprint.

Cite this