FFT, Bit mapped Aperture.

Cuthbert Nyack
Applet shows the diffraction pattern from a bit mapped aperture. The aperture has 64 pixels and the transmitivitty of each pixel can be varied from 0(shown as green) to 1(shown as red) by the scrollbars. The input consists of 128 by 128 samples and the samples outside of the aperture are assumed to have zero transmitivitty.

The numerical values of the transmitivitty is shown by the white text. The diffraction pattern shows maximum intensity as red and zero intensity as green. The scrollbar number for changing the pattern is shown in blue.

Changing scrollbar 64 from 1 to 78 shows some of the possibilities.
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COPYRIGHT 2007 Cuthbert Nyack.