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Mircea Pteancu

24 Iun 2008 10:53



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Richard Snashall este un membru foarte activ al listei ATM.Am primit  de la el mai multe proiecte, ca cel de mai jos.Nu pricep prea multe,atat insa am inteles ca daca proiectarea unui telescop Newton o poate face chiar si un parlamentar roman,ei bine,proiectarea obiectivelor de refractor este mult  mai dificila.Sau este simpla de fapt,pentru cine cunoaste Optica !!!! ???
Retetele de obiective, gata calculate de Richard ,le pot trimite curajosilor.Daca o sticla,sau alt parametru difera de reteta,cred ca Richard ne va ajuta sa ajustam.

EXEMPLU:




Richard F.L.R. Snashall wrote:
> Or, with a small loss, you could try for both (and get
> some bonus geometric constraints):
Or, simpler would be:

Title: Ptz10-96qx
152.4 mm f/10.4 Refractor
Replacing doublet with subaperture corrector
But going for the same back focus and EFL.
VS: 0.9448

Surf     Radius  Thickness     Glass  Diameter

STO   Infinity  -2.190324               152.4
   2    1326.57      15.96     N-BK7   155.448
   3   -814.665       3.05             155.448
   4   -814.665      11.31        F4   155.448
   5    -3705.3   1455.764             155.448
   6     293.62       12.7     N-SF4        70
   7    -135.29          5   N-KZFS8        70
   8    148.345       12.3    N-FK51        70
   9   -288.664          5   N-KZFS8        70
  10   Infinity   531.5646                  70
IMA   Infinity                             13

Yes, it still has the same focal point and effective
focal length as the Petzval while keeping the CG
of the corrector at the same point as the CG of the
Petzval secondary doublet.

''Astept provincia''.Mircea

