Leasurement of Modulation Transfer Function (MF) 
on Aerial Camera Lenses 
Dr.rer.nat. A. Bode 
and Dipl.-Phys. B. Bißmann 
VEB Carl Zeiss JENA 
69 Jena, GDR 
Abstract: 
In Jena an equipment for neasurement 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- 
Spread 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 4/125" for the cosmic multispectral- 
photography and on the wide-angle lens of type 
"Lamecon PI 4.5/450". 
The Lamegon lens possesses a high performance 
eSpecially in the image field. 
The MTF curves 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.