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Old 17-05-2015, 07:41 PM
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coldlegs (Stephen)
Chopped its rear end off!

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Join Date: Jul 2009
Location: adelaide, sth aust
Posts: 330
Minimising vane spikes...Apodization anyone??

Apodization. Now there's a word I hadn't heard before. Stumbled on to it whilst searching for examples of the diffraction spikes produced by four vane curved spiders similar to the one on my newt truss that had just finished a rebuild. Found this lot of useful spike pattern images
http://www.astronet.co.kr/xe/making/177075


Then stumbled on apodization in this cloudy nights thread (towards the bottom of the page).
http://www.cloudynights.com/topic/49...-spikes/page-3


I'll let wikipedia explain it.
http://en.wikipedia.org/wiki/Apodization


Here's the science
http://www.ejournal.unam.mx/rmf/no511/RMF51116.pdf


Seem to be mainly used to resolve very close double stars and if your desperate to minimise your spikes.



You learn something every day!!
Cheers
Stephen
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Last edited by coldlegs; 18-05-2015 at 01:28 PM.
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