T 
4 
d = E SE = Ado, 4axy)- acy] (3) 
Here it is Ade, = 39%, - doy, and Adx - a - exl 
If only one camera is used and the depth of field of 
the object lies below 20 % of the setting distance, the 
residual errors are still tolerable. Using a two-camera 
system it will, however, be inevitable, depending on 
the size of the depth of field, to provide for a 
sufficiently good alignment of the object body axes rel- 
ative to the image axes and to work with additional 
control points near the front and rear limitations of 
the object. rus 
4, Summary 
À report is given on the determination and guarantee 
of data of inner orientation, viz. calibrated focal length, 
principal point position, distortion and image deforma- 
tions caused by the production process, in the focusable 
UMK 10/1318 Universal Measuring Camera of VEB Carl Zeiss 
JENA and an investigation is made of the influence of 
inner orientation in the measurement of objects with a 
large depth of field. | 
5. References =. 
-/1/ Russinow, M.M.: On the orthoscopy of decentred aero- 
photogrammetric lenses (in Russian). Publication of 
the Central Scientific Research Institute, Issue 122, 
1957 
/2/ Wirtz, G.: Mathematical models for the calibration 
data of terrestrial-photogrammetric cameras and the 
influence of residual errors on the stereophotogram- 
metrio result. ! 
Thesis, Technical University Dresden 1976 
/3/ Wirtz, G.: Mathematical models for correcting 
. optical imaging errors in close-range photogrammetric 
photography. 
Presented Paper at the Symposium of Commission I 
of the ISP, Stockholm 1974. | 
Surveying News of VEB Carl Zeiss JENA No. 31