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Proceedings Paper

Michelson- versus Fizeau-type beam combination: is there a difference?
Author(s): Michel Faucherre; Bernard Delabre; Philippe Dierickx; Fritz Merkle
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Paper Abstract

Pros and cons of Michelson and Fizeau type interferometer configurations are compared for systems in space having baselines in the 5 to 100 meter range, when a large field of view is requested for off-axis tracking. The size of the coherent field-of-view is larger in a Fizeau type interferometer but the tolerances required by wide field operation are easier to achieve in the Michelson type. Furthermore, aberration compensation, which calls for more than three optical elements per beam to assure that the beams overlap in the Fizeau field of view, makes it necessary to split the on and off-axis fields before the f/250 final combination plane in both cases. Two categories of configurations are defined: for baselines B less than 10 meters, a Fizeau type is preferable; conversely a Michelson type should be adopted when B is greater than 10 meters. After summarizing the difficulties to overcome in each type, a solution for each type in space environment is proposed.

Paper Details

Date Published: 1 August 1990
PDF: 12 pages
Proc. SPIE 1237, Amplitude and Intensity Spatial Interferometry, (1 August 1990); doi: 10.1117/12.19335
Show Author Affiliations
Michel Faucherre, European Southern Observatory (France)
Bernard Delabre, European Southern Observatory (Germany)
Philippe Dierickx, European Southern Observatory (Germany)
Fritz Merkle, European Southern Observatory (Germany)

Published in SPIE Proceedings Vol. 1237:
Amplitude and Intensity Spatial Interferometry
James B. Breckinridge, Editor(s)

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