A device of the image orthicon type is disclosed for electrooptical integration and correlation systems utilizing a crossed electric and magnetic field deflection region and a retarding potential filter. The crossed electric and magnetic fields deflect a beam of primary electrons from a photoemissive cathode for the conversion of collimated light input signals within the electron image section which results in the emission of secondary electrons impinging on a target member. The retarding potential filter is biased at a potential to optimize the effective secondary electron emission ratio relative to the primary photoelectrons.
IMAGE CORRELATOR TUBE WITH CROSSED FIELD DEFLECTION