Diffractive simultaneous bidirectional shearing interferometry using tailored spatially coherent light

被引:11
|
作者
Nercissian, Vanusch [1 ]
Harder, Irina [2 ]
Mantel, Klaus [2 ]
Berger, Andreas [1 ]
Leuchs, Gerd [1 ,2 ]
Lindlein, Norbert [1 ]
Schwider, Johannes [1 ]
机构
[1] Univ Erlangen Nurnberg, Inst Opt Informat & Photon, D-91058 Erlangen, Germany
[2] Max Planck Inst Sci Light, D-91058 Erlangen, Germany
关键词
RECONSTRUCTION; GRATINGS; ARRAY;
D O I
10.1364/AO.50.000571
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
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. (c) 2011 Optical Society of America
引用
收藏
页码:571 / 578
页数:8
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