Near-field diffraction from amplitude diffraction gratings: theory, simulation and results

Kazi Monowar Abedin; S.M. Mujibur Rahman

doi:10.1117/12.2262257

16 August 2017 Near-field diffraction from amplitude diffraction gratings: theory, simulation and results

Kazi Monowar Abedin, S.M. Mujibur Rahman

Author Affiliations +

Proceedings Volume 10452, 14th Conference on Education and Training in Optics and Photonics: ETOP 2017; 1045208 (2017) https://doi.org/10.1117/12.2262257
Event: 14th Conference on Education and Training in Optics and Photonics, ETOP 2017, 2017, Hangzhou, China

Abstract

We describe a computer simulation method by which the complete near-field diffract pattern of an amplitude diffraction grating can be generated. The technique uses the method of iterative Fresnel integrals to calculate and generate the diffraction images. Theoretical background as well as the techniques to perform the simulation is described. The program is written in MATLAB, and can be implemented in any ordinary PC. Examples of simulated diffraction images are presented and discussed. The generated images in the far-field where they reduce to Fraunhofer diffraction pattern are also presented for a realistic grating, and compared with the results predicted by the grating equation, which is applicable in the far-field. The method can be used as a tool to teach the complex phenomenon of diffraction in classrooms.

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Kazi Monowar Abedin and S.M. Mujibur Rahman "Near-field diffraction from amplitude diffraction gratings: theory, simulation and results", Proc. SPIE 10452, 14th Conference on Education and Training in Optics and Photonics: ETOP 2017, 1045208 (16 August 2017); https://doi.org/10.1117/12.2262257

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KEYWORDS

Near field diffraction

Diffraction gratings

Computer simulations

Diffraction

Far-field diffraction

MATLAB

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