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DOE OSTI · 22036575

Diffractive simultaneous bidirectional shearing interferometry using tailored spatially coherent light

Nercissian, Vanusch·Harder, Irina·Mantel, Klaus·Berger, Andreas·Leuchs, Gerd·Lindlein, Norbert·Schwider, Johannes
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Abstract

Measurements of wavefront deformations can be carried out with the help of lateral shearing interferometers. Here the focus is on a setup providing two shears along orthogonal directions simultaneously to generate the data needed for a reconstruction. We describe a diffractive solution using Ronchi phase gratings with a suppressed zeroth order for both the doubling of the wavefront under test and the bidirectional shearing unit. A series arrangement of the gratings offers an on-axis geometry, which minimizes the systematic errors of the test. For illumination, an extended incoherent monochromatic light source is used. High-contrast fringes can be obtained by tailoring the degree of coherence via a periodic intensity distribution.

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71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICSDEFORMATIONDISTRIBUTIONERRORSILLUMINANCEINTERFEROMETERSINTERFEROMETRYLIGHT SOURCESMATHEMATICAL SOLUTIONSMONOCHROMATIC RADIATIONPERIODICITYSIMULATIONVISIBLE RADIATION

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Nercissian, Vanusch, Harder, Irina, Mantel, Klaus, Berger, Andreas, Leuchs, Gerd, Lindlein, Norbert, Schwider, Johannes. 2011-02-01. Diffractive simultaneous bidirectional shearing interferometry using tailored spatially coherent light. https://doi.org/10.1364/ao.50.000571

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