PhotoMetric Camera’ 
THEODORE YONKLER, President, The Photo Metric Corporation, 
New York, New York 
HE PhotoMetric Camera produces four images of an object from four 
separate angles by a single exposure. Each of the four images is correlatable 
and reference points can be cross identified from one image to another for 
measurement and analysis. 
Perfectly scaled images are projected to life size and are measured within a 
tolerance of 4s of an inch in 72 inches. 
Figure 1 illustrates the position of camera, subject, lights, and the series of 
reflecting surfaces. Mirrors are used to obtain the several views by one exposure. 
Each mirror is precisely located to maintain focal paths of equal length for each 
view. 
CAMERA ROOM 
Figure 2 shows the subject positioned and the operator taking the picture. 
This room contains the following apparatus: 
(1) Camera.—The PhotoMetric Camera (Figure 4) was especially devel- 
oped, after extensive research by the Eastman Kodak Company, for the ex- 
clusive use of this process. It is electrically operated (60 cycle alternating cur- 
rent only, 105-125 volts) and the lighting values and focus have been computed 
and permanently set in. 
  
LAYOUT +f PHOTOMETRIC Room’ 
Z LICHT ^t REOR / 
     
  
MIRROR 
MIRROR 
Foca. PATHS 
BACK VIEW FRONT VIEW PROFILE VIEW 
  
  
  
Fıc. 1. Layout of PhotoMetric room. 
* This is one of the papers included in the Report of the Reporter for U.S.A. Commission V of 
the International Society of Photogrammetry. 
GV-81