Pi 
     
   
residual vertical 
parallaxes 
— 2 2 rt sue se pe es ep 0 ee a Ce 0m au bau aan a na a al a a 
b 
  
  
Fig. 11. The vertical parallaxes, indicated it 44, caused by the lens distortion of 
the Aviogon lens at forward overlap of 65 %. The streaked surfaces represents the 
residual vertical parallaxes. 
  
  
E=f(r) . I 
4 P 
| Ys 
1 — 
I 
I M 
I 
Fig. 12. Mathematical study of the vertical parallaxes representing the origin part 
of the lens distortion curve (left) and a point P close to the principal point 
(right). 
22