GV—86 PHOTOGRAMMETRIC ENGINEERING 
around the subject's head. The shield is a thin metal strip located between light 
and subject. The lamps are so adjusted that their filaments are in the same plane 
as that going through the edge of the opaque shield. With this arrangment the 
lamps throw a sharp shadow edge of the shield against the head and neck of 
the subject. The schematic diagram in Figure 2 shows a top view of a recording 
device for an all-around sculptured portrait. 
'The shadow edge divides the head and neck in two parts, a dark one and the 
  
  
  
Fıc. 1. Recording device for all-around portrait. 
other illuminated. The dividing line follows the configuration of the head and 
neck, thus revealing their outlines. The revealed contour outlines are photo- 
graphed by the motion picture camera. 
The camera with lights and shield together form a unit. When moved 
through a small angle around the subject, the dividing line is also moved 
through a small angle, thereby revealing another contour outline of an adja- 
cent but slightly different section through the head and neck, which the motion 
picture camera, actuated by the rotation of the unit, photographs. These