Peterson 
WATER 
FLOW TEST 
SECTION 
WALL 
GLASS 
Y 
RUE PORT 
LASER 
A phtecby 
BEAM 
EXPANDER 15 CM 
PHOTOGRAPHIC 
PLATE 
HEADFORM 
FIGURE 8. BASIC SCHEMATIC FOR BUBBLE MEASUREMENT 
WITH FRAUNHOFER HOLOGRAPHY 
1168 
