Talbot carpet at the transverse plane produced in the diffraction of plane wave from amplitude radial gratings

被引:37
|
作者
Rasouli, Saifollah [1 ,2 ]
Khazaei, Ali Mohammad [1 ]
Hebri, Davud [1 ]
机构
[1] IASBS, Dept Phys, Zanjan 4513766731, Iran
[2] IASBS, Opt Res Ctr, Zanjan 4513766731, Iran
关键词
MOIRE DEFLECTOMETRY; LASER-BEAM; REALIZATION; EVOLUTION; FRONT; LIGHT; ANGLE;
D O I
10.1364/JOSAA.35.000055
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
We experimentally demonstrate and theoretically predict a new and unprecedented optical carpet that includes all the geometric shadow and far-field and near-field diffraction patterns at the transverse plane in the diffraction from a radial grating illuminated by a plane wavefront. The main feature of using radial grating is the continuous change of the spatial period along the radial direction. Therefore, the geometric shadow, and the near-field and far-field diffraction regimes are mixed at various propagation distances, and the traditional definitions for the different diffraction regimes would not apply here. We show that for a given propagation distance, at a certain radial distance the shadow regime changes to the near-field regime and at another certain radial distance, the diffraction pattern changes from a near-field to a far-field case. (c) 2017 Optical Society of America
引用
收藏
页码:55 / 64
页数:10
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