Image: Zonenplatte Cosinus
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Description: Frenel's zone plate with sinusoidal transparency. For calculation code see below.
Title: Zonenplatte Cosinus
Credit: Home brewed picture
Author: Georg Wiora (Dr. Schorsch)
Permission: CC-BY-SA 2.5, 2.0, 1.0 and GFDL by the Author
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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