Image: Diffraction on elliptic aperture with fft

$Diffraction on elliptic aperture with fft$

Size of this preview: 402 × 599 pixels. Other resolutions: 161 × 240 pixels | 556 × 828 pixels.

Original image ‎(556 × 828 pixels, file size: 315 KB, MIME type: image/png)

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. 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.
Title: Diffraction on elliptic aperture with fft
Credit: Own work
Author: FDominec
Usage Terms: Creative Commons Attribution-Share Alike 3.0
License: CC BY-SA 3.0
License Link: http://creativecommons.org/licenses/by-sa/3.0
Attribution Required?: Yes

Image usage

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Diffraction

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