Ernst Leitz G.m.b.h.

Hermann Eisenkopf

Ludwig Leitz

Means for stabilizing the line of sight between an object and an optical viewing system which can move relative to each other, characterized in that electrical signals are derived with the aid of an optical grating (3',3') as a correlator, which signals correspond to the deviation from the line of sight (4) with respect to magnitude, direction, and arithmetic symbol; and that these signals are fed to a follower system (11,12) such as disclosed in L. M. Biberman: Reticles in Electro-Optical Devices, Pergamon Press, 1966, p. 45 which displaces the line of sight (4) until the original condition has been restored and the deviation has become zero again.

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Naunheim, Germany

Hermann Eisenkopf