rof. F. 
 trans- 
h, nm, 
' linear 
ints m 
gles ay, 
(4) 
(5) 
(6) 
1clined 
[; here 
> after 
he in- 
'h are 
ge the 
ument 
racing 
ess of 
section 
s near 
aerial 
large- 
e here 
design 
Further investigations 
of the principle of ray- 
bundles transformation have 
shown that, if the photo- 
graphs are mounted in an 
inclined position, there is a 
possibility of introducing 
several forms of mechani- 
zation. The said possibility 
is based upon the solution 
(by any convenient method) 
of the relation k = F/f,. For 
instance, as 
IF —kAf, 
it is possible to plot the 
necessary changes, A f,, of 
the focal length with the aid 
of an aerial photograph 
inclined at an angle a, and 
of a pusher, the latter serv- 
  
ing to plot the value 4 f,. 
The scheme of Fig. 9 il- 
lustrates one of the possible 
solutions of the problem. 1) 
A spatial rod moves with its 
lower linkage along the co- 
  
ordinates x, y, z. At a dis- 
tance F' there is a linkage of Fig. 8. 
the vertical carriage des- 
tined for plotting the values of A F. On the lug of the adjoining carriage, 4 f,, is arranged 
/ a picture holder of a given focal length which 
I ||» holder is set with an inclination at the angles 
/ 0,0. 
" / | In the plane of the holder moves a gimbal 
: mechanism in form of a ring, through which 
| — 1 = the line of sighting passes. 
/ After the segment A f,. has been obtained, 
/ the balancing arm «bed, rotatable about the 
point C, plots the segment AF on the con- 
T dition that 
ac JF 
; k 
be Af, 
Thus, regulating the length of the arms be 
and ac, it is possible to get the necessary cor- 
rections to aerial photographs of a given focal 
  
x y length. 
Fig. 9. It should be noted, that, as the aerial 
1) See “The Information Bulletin of the Ministry of National Education of the 
U.S.S.R.”, Section “Geodesy and Aerial Surveying”, 1958.