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Measurement of Modulation Transfer Function (mrp) 
  
on Aerial Camera Lenses 
  
Dr.Andreas Bode, Dipl.Ing. Uwe Untergutsch 
and Dipl.Phys.Barbara Bissmann 
Carl-Zeiss-Str. 1 
GDR-69 JENA 
DDR 
ABSTRACT 
In Jena an equipment for measurement of MTF on high- 
performance lenses in aerial survey cameras is used, which 
is working by the principle of slit-image-analysis. The 
whole measuring process is controlled by a digital computer 
storing point-by-point the slit-image-function being 
transformed by Fourier-analysis afterwards. With this 
method the MTF was measured on the new designed lenses of 
VEB Carl Zeiss JENA of types "Pinatar !/125" for the cosmic 
multispectralphotography and on the wide-angle-lens of 
type "Lamegon PI 4,5/150". 
The new Lamegon lens possesses an essential improvement 
of performance in contract to the predecessor lens especially 
in the image field. 
The MTF-ouryes of Pinatar show, that this lens is 
nearly an aperture limited lens and has a resolution of 
about 300 L/mm. The measuring method has a high accuracy 
up to this spatial frequency.