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Reference.org
Apodization
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<p>In <a href="/facts/Signal_processing/Npaja6zb">signal processing</a>, apodization is the modification of the shape of a <a href="/facts/Mathematical_function/CdReEKCh">mathematical function</a>. The function may represent an electrical signal, an optical transmission, or a mechanical structure. In <a href="/facts/Optics/p0vq4S1T">optics</a>, it is primarily used to remove <a href="/facts/Airy_disk/eDdnH4AQ">Airy disks</a> caused by <a href="/facts/Diffraction/Mk80xXHT">diffraction</a> around an intensity peak, improving the focus. </p>