Coherent 
Illuminating 
Beam 
Mirror 
Photographic Plate 
(a) Recording the Hologram of a 3-Dimensional Object. A mirror reflects part of the illumination 
at an angle 8, and the remainder is scattered by the object. Both are combined on the 
photographic plate to form the Hologram. 
D P m Order 
-— 
ut ax 
+ dm 
Zero Order 
  
Illuminating 
Beam 
  
  
  
  
First Order 
(b) Reconstruction of the Virtual and Real Images. The First Order and Zero Order Beams 
are Now Separated Through the Angle 6. 
NOTE: Skew illumination is used in Recording and Direct Illumination in Reconstruction. 
05-0268 
FIRST IMPROVEMENT IN HOLOGRAPHY * 
* E. N. Leith and J. Upatnieks, Journ. Opt. Soc., Am. Dec. 1963. 
29