Knife-edge diffraction pattern as an interference phenomenon: An experimental reality

Kumar, Raj and Kaura, S.K. and Sharma, A.K. and Chhachhia, D.P. and Aggarwal, A.K. (2007) Knife-edge diffraction pattern as an interference phenomenon: An experimental reality. Optics & Laser Technology, 39 (2). pp. 256-261. ISSN 0030-3992

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This paper demonstrates that a knife-edge diffraction pattern is, indeed, due to the interference of two superimposing waves: the geometrical wave and the boundary diffraction wave. Within the framework of boundary diffraction wave theory it is shown that this diffraction pattern can easily be broadened in such a manner that a single fringe covers the whole field of view. At this point the system converges to a schlieren diffraction interferometer and could be used for the study of phase objects using diffraction-limited optics. Experimental observations show that the method bears a similarity to that of any known two-beam interferometer, e.g. Mach-Zehnder interferometer. The experimental details have been presented and the results are compared with a two-beam holographic interferometer and a point diffraction interferometer.

Item Type: Article
Uncontrolled Keywords: Diffraction; Interference; Schlieren techniques
Subjects: CSIO > Optics
Depositing User: Ms. J Shrivastav
Date Deposited: 29 Mar 2012 23:17
Last Modified: 11 Apr 2012 11:12

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