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Optical Engineering

Influence of the finite aperture and observation of higher longitudinal-order fringes in Fizeau interferometry
Author(s): Heikki M. Lauranto; Ari T. Friberg; Timo T. Kajava
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Paper Abstract

The interference pattern of a Fizeau interferometer, ideally a (nearly) self-imaging field, is examined under true measurement conditions. The quality of the higher longitudinal-order fringes is investigated by finite-aperture diffractive calculations. A specific symmetry property of the volume interference pattern, namely the invariance of the intensity structure under a rotation of the interferential wedge about its apex, is studied by nondiffractive simulations that take into account the instrument geometry and finite incident wave. The formation of the higher longitudinal-order fringes is verified experimentally. The possibility of transferring these fringes close to the device by a suitable non-normal incidence is demonstrated. The existence of various fractional Talbot planes is also confirmed.

Paper Details

Date Published: 1 September 1995
PDF: 8 pages
Opt. Eng. 34(9) doi: 10.1117/12.208530
Published in: Optical Engineering Volume 34, Issue 9
Show Author Affiliations
Heikki M. Lauranto, Helsinki Univ. of Technology (Finland)
Ari T. Friberg, Helsinki Univ. of Technology (Finland)
Timo T. Kajava, Cornell Univ. (United States)

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