V—2 ROCKETS—KRAUSE 
GRATING 
BEAD 
FILM 
197 
BEAD 
“SECTOR SHUTTER 
~a=PLANE MIRROR 
RECOVERABLE 
FILM CONTAINER 
SPECTROGRAPH 
Ficure 4.—Sketch of spectrograph"designed forgusezin the V—2. 
as to minimize the effect of roll and 
other movements of the missile. ‘The 
image from this little bead is reflected 
to a grating and in turn to a 35-mm. 
film on which the images from the 
two beads are recorded separately. 
The spectrograph was originally de- 
signed to fit in the nose of the war- 
head but, because of greater ease of 
recovery, it has been, in more recent 
flights, mounted in one of the tail fins. 
As pointed out previously, spectro- 
graphs have on several occasions been 
recovered in such good condition that 
they were capable of being used 
again (24). 
