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nobody

28 Iun 2010 17:42



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Mie mi-a luat mult mai mult pana sa gasesc informatiile si sa le diger.  :lol: 

Tare curios sunt cum arata masurate mai multe instrumente ieftine care toate se pretind a fi excelente, ce abuzeaza de ideea de "diffraction limited".

Mai ceva:
As a final note, the Strehl ratio derived from an interferometric measurement of the RMS wavefront error represents a ceiling on the attainable performance. In use, a mirror will never attain this performance, mostly because of seeing, but also because of collimation errors and errors from the other optical elements in the path. Even the steadiest nights at the best sites do not allow a system to achieve this performance, but it can come quite close.

