100 PHOTOGRAMMETRIC ENGINEERING & REMOTE SENSING, 1976 
zZ t = 
! 
[Te +] Fl Vom 
THE T= 
[3 1 Ttf Ï <= 
S ! v ! ^j 
F + re 
\ | x PT 
bere Ey 
ALU 
P] E FT + le 
| TE E X 
SLE LS EE 
HAAS TS 
LI us 
rrr 
Y IL: 7 
EE E 
| he , 200 ux. 
| ee Re 
LE 
y -— 
y 
=F 
= 
y 
Fic. 6. Three-dimensional presentation of 
the aircraft movement as derived from the 16 
mm movie. The coordinate axes are cen- 
tered at the aircraft for the instant of impact 
and each seventh frame going backwards on 
the film is shown. The grid spacing is 20 min 
all three coordinate directions. 
obtained by this beam splitter attachment, is approximately the distance between the two 
outside mirrors. The use of the system is consequently limited to close-range applications 
involving reasonably short base lengths. 
The system was used in the photogrammetric determination of particle velocity vectors in a 
vertical two-phase solid-gas flow*. The determination of the particle velocity was based on 
double flash, consecutive photographic exposures at a time interval of 1074 sec, using a flash 
duration of 0.5 x 10-8 sec. The particle flow was photographed in a vertical test column 
through a plane-parallel glass window. A grid of horizontal and vertical lines at known spacing 
\ 
Tons 
  
Stereo attachment for Micro- Comera > 
Fıc. 7. Beam splitter attachment.