Interferometry

Optimal geometry for Sagnac and Michelson interferometers used as spectral imagers

[+] Author Affiliations
Yann Ferrec, Jean Taboury, Hervé Sauer, Pierre Chavel

Centre National de la Recherche Scientifique, Laboratoire Charles Fabry de l’Institut d’Optique, Bâtiment 503, Centre Scientifique, F 91403, Orsay Cedex, France

Opt. Eng. 45(11), 115601 (November 29, 2006). doi:10.1117/1.2395923
History: Received November 30, 2005; Revised April 18, 2006; Accepted April 24, 2006; Published November 29, 2006
Text Size: A A A

High-étendue Fourier transform imaging spectrometers can be useful tools for acquiring airborne hyperspectral images, since they do not need moving parts and, as Fourier transform spectrometers, they benefit from the Felgett advantage. The Sagnac interferometer and the Michelson interferometer with dihedrons can be used in such an instrument. These two interferometers act very similarly on the entering beam, and in particular they both work with fringes of equal inclination. This property enables them to benefit from the Jacquinot advantage, too. Nevertheless, to fully benefit from this advantage, it is necessary to maximize the geometrical étendue accepted by the interferometer. From this point of view, the Michelson interferometer with dihedrons appears to be much more interesting than the Sagnac interferometer. Indeed, calculation shows that, in the optimal symmetric configuration, and for the same beamsplitter diameter, the étendue accepted without vignetting by the Michelson interferometer is more than five times greater than the étendue accepted by the Sagnac interferometer. Even if, in a real instrument, the optical scheme cannot be exactly this optimal configuration, this result is a strong argument in support of the Michelson interfero-meter with dihedrons.

Figures in this Article
© 2006 Society of Photo-Optical Instrumentation Engineers

Citation

Yann Ferrec ; Jean Taboury ; Hervé Sauer and Pierre Chavel
"Optimal geometry for Sagnac and Michelson interferometers used as spectral imagers", Opt. Eng. 45(11), 115601 (November 29, 2006). ; http://dx.doi.org/10.1117/1.2395923


Tables

Access This Article
Sign in or Create a personal account to Buy this article ($20 for members, $25 for non-members).

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

PubMed Articles
Advertisement


  • Don't have an account?
  • Subscribe to the SPIE Digital Library
  • Create a FREE account to sign up for Digital Library content alerts and gain access to institutional subscriptions remotely.
Access This Article
Sign in or Create a personal account to Buy this article ($20 for members, $25 for non-members).
Access This Proceeding
Sign in or Create a personal account to Buy this article ($15 for members, $18 for non-members).
Access This Chapter

Access to SPIE eBooks is limited to subscribing institutions and is not available as part of a personal subscription. Print or electronic versions of individual SPIE books may be purchased via SPIE.org.