Small-angle X-ray scattering - Hasylab - Desy
Small-angle X-ray scattering - Hasylab - Desy
Small-angle X-ray scattering - Hasylab - Desy
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20<br />
40<br />
60<br />
80<br />
<strong>Small</strong> is big & big is small<br />
Real space<br />
100 0<br />
0 50 100<br />
(after you take a Fourier transform)<br />
1<br />
0.8<br />
0.6<br />
0.4<br />
0.2<br />
FFT<br />
-0.3<br />
20<br />
40<br />
0<br />
60<br />
80<br />
Inverse space<br />
0.3<br />
-0.3 0 0.3<br />
Pixel q-pixel (1/pixel)<br />
100<br />
0 50 100<br />
Period d = 10 pixels 1 q-pixel is of length 2π/100 ≈ 0.06 1/pixel<br />
Period d = 2π/q = 2π/(10*0.06) = 10 pixels<br />
x 10 6<br />
8<br />
6<br />
4<br />
2<br />
0
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