Full Content is available to subscribers

Subscribe/Learn More  >
Proceedings Article

Phase-shifting multiwavelength dynamic interferometer

[+] Author Affiliations
Michael B. North-Morris, James E. Millerd, Neal J. Brock, John B. Hayes

4D Technology Corp. (USA)

Proc. SPIE 5531, Interferometry XII: Techniques and Analysis, 64 (August 2, 2004); doi:10.1117/12.560829
Text Size: A A A
From Conference Volume 5531

  • Interferometry XII: Techniques and Analysis
  • Katherine Creath; Joanna Schmit
  • Denver, CO | August 02, 2004


The benefits of using two-wavelength measurements to extend the dynamic range of an interferometric measurement are well known. We present a new multi-wavelength interferometer that uses two successive single frame measurements obtained rapidly in time to significantly reduce sensitivity to vibration. At each wavelength, four phase-shifted interferograms are captured in a single image. The total acquisition time for both wavelengths is 100 microseconds, over three orders of magnitude shorter than conventional interferometers. Consequently, the measurements do not suffer from the fringe contrast reduction and measurement errors that plague temporal phase-shifting interferometers in the presence of vibration. In this paper we will discuss the basic operating principle of the interferometer, analyze its performance and show some interesting measurements.

© (2004) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.

Michael B. North-Morris ; James E. Millerd ; Neal J. Brock and John B. Hayes
"Phase-shifting multiwavelength dynamic interferometer", Proc. SPIE 5531, Interferometry XII: Techniques and Analysis, 64 (August 2, 2004); doi:10.1117/12.560829; http://dx.doi.org/10.1117/12.560829

Access This Article
Sign In to Access Full Content
Please Wait... Processing your request... Please Wait.
Sign in or Create a personal account to Buy this article ($15 for members, $18 for non-members).



Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging & repositioning the boxes below.

Related Book Chapters

Topic Collections


Buy this article ($18 for members, $25 for non-members).
Sign In