Standard Article


  1. Parameswaran Hariharan1,
  2. Katherine Creath2

Published Online: 15 JUL 2005

DOI: 10.1002/3527600434.eap185.pub2

Encyclopedia of Applied Physics

Encyclopedia of Applied Physics

How to Cite

Hariharan, P. and Creath, K. 2005. Interferometry. Encyclopedia of Applied Physics. .

Author Information

  1. 1

    University of Sydney, School of Physics, Australia

  2. 2

    Optineering, Tucson, Arizona, USA

Publication History

  1. Published Online: 15 JUL 2005


This article reviews the field of interferometry. It begins by outlining the fundamentals of two-beam and multiple-beam interference. The rest of the article discusses the applications of interferometry for measurement of length, optical testing, fringe analysis, interference microscopy, interferometric sensors, interference spectroscopy, nonlinear interferometers, interferometric imaging, space-time and gravitation, holographic interferometry, Moiré techniques, and speckle interferometry. Each section provides a referenced (and cross-referenced) overview of the application area.


  • interferometry;
  • interference;
  • interferometers;
  • optical testing;
  • optical metrology;
  • nondestructive testing