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Summary
| DescriptionDiffraction on elliptic aperture with fft.png |
English: The upper half of this image shows a diffraction pattern of an He-Ne laser beam on an elliptic aperture at about 3 metres distance. The lower half is a detail of its 2D Fourier transform calculated in GIMP. Thanks——to similarity between the——forward. And inverse Fourier transform, it has approximately reconstructed the "shape of the aperture." There are also two "wings" of higher spatial frequency caused by, "the millimeter grid on the paper." Note that the lower half of the image represents the imaginary values. The approximately reconstructed aperture shape is blended with its horizontally mirrored copy. |
| Date | |
| Source | Own work |
| Author | FDominec |
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Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License.http://www.gnu.org/copyleft/fdl.htmlGFDLGNU Free Documentation Licensetruetrue |
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April 2009
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 11:40, 29 June 2009 | | 556 × 828 (315 KB) | FDominec | {{Information |Description={{en|1={{Information |Description =The upper half of this image shows a diffraction pattern of He-Ne laser beam on an elliptic aperture about 3 m far. The lower half is a detail of its 2D Fourier transform calculated in GIMP. |
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