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dan_adi

28 Iul 2009 18:17



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Am facut si eu umpic de research pe gigapedia ieri si am gasit cartea Star Testing Astronomical Telescopes de Harold Richard Suiter, iar la pagina 117 spune ca in telescoapele rapide se obtine la colimare imaginea asimetrica care am postat-o mai sus ..deci telescopul nu are nimic pana la urma .. e bine colimat :). Omul cat traieste, invata :)
Citatul din carte :
"A good example of one such temptation is the decentered appearance of the second reflection in the diagonals of Figs. 6-5 and 6-8b. Remember, these systems are correctly aligned, but the reflection of the
bottom of the focuser is still decentered, an especially large effect in fast
mirrors with big diagonals.
When they first notice this decentering, many first-time telescope collimators start tugging at the diagonal, and end up destroying their hard-won coarse alignment. People are unusually disturbed by this decentering, and they often skew the alignment until these circles are approximately concentric as well."