oeufh.py

Created on March 05, 2025

505 Bytes

Av = 1/(4xR)
R = 1/(4xAv)
Av = 1/u(en minute)

ex: une lettre de 50mm a 5 metre
1) angle sous lequel est vu la lettre
tan(u) = 0,05/5 = 0.01
tan(0.01) = 0.543° (=u)
u = O.543° = 34,38 minutes d'arc

2) quelle est l'Av ?
   5/34.38 = 0,1454 = 1/7 eme
   
   
ex:18mm de hauteur
1) quantite accomodative  necessaire pour 4cm
   1/0.4 = 2.5 dioptries

2) AV necessaire si 5/u
   tan = 0.0018/0.4 = O.0045
   u = tan-1(0.0045) = 0.2578° = 15.47 minute d'arc
   Av = 5/u = 5/15.47 = 0.323 = 3/10

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