Correction of the spacial spectrum distorted by the optical system using 
        the reference image method.
        
        
        
        Part 1. Classical reference image method.
        
         
        
        Yu. V. Gulyaev, À.Yu.
        Zrazhevsky, 
        A.V.
        Kokoshkin, V.A. 
        Korotkov, V. A. Cherepenin
        
        Kotel’nikov Institute of Radio Engineering and 
        Electronics RAS
The paper is received 
on November 27, 2013