Radar simulation apparatus

Claim 1

RADAR SIMULATION APPARATUS PROVIDING SCAN CONVERSION, AND COMPRISING RADAR SIMULATING MEANS FOR SIMULATING THE POSITION OF A PLURALITY OF TARGETS RELATIVE TO FIXED AXES, INCLUDING MEANS TO GENERATE IN SEQUENCE THE COORDINATES OF EACH OF SAID TARGETS RELATIVE TO FIXED RECTANGULAR AXES, INPUT MEANS INCLUDING A FIRST CATHODE RAY TUBE FOR DISPLAYING THE POSITION OF SAID TARGETS SINGLY IN SEQUENCE, A CAMERA TUBE FOR VIEWING SAID FIRST CATHODE RAY TUBE TARGET DISPLAY, SCANNING MEANS COMPRISING CAMERA TUBE BEAM DEFLECTING MEANS FOR REPETITIVE SCANNING OF SAID FIRST CATHODE RAY TUBE DISPLAY ACCORDING TO A SIMULATED RADAR SCANNER BEARING, AND OUTPUT MEANS INCLUDING A SECOND CATHODE RAY TUBE FOR DISPLAYING THE POSITION OF A PLURALITY OF TARGETS RELATIVE TO A SIMULATED SCANNER POSITION, SAID FIRST CATHODE RAY TUBE HAVING A PERSISTENT SCREEN PHOSPHOR PROVIDING A DISPLAY OF EACH TARGET FOR A PERIOD EXCEEDING AT LEAST ONE OF THE SCANNING OPERATIONS, THE FORM OF SCANNING USED FOR SAID CAMERA TUBE AND SAID SECOND RAY TUBE BEING THE SAME, AND FURTHER INCLUDING AN INTERMEDIATE OPTICAL SYSTEM BETWEEN SAID FIRST CATHODE RAY TUBE DISPLAY MEANS AND THE CAMERA TUBE INCLUDES A LENS OBJECTIVE AND A SEMI-SILVERED MIRROR, THE SEMI-SILVERED MIRROR COMBINING THE IMAGE OF THE FIRST CATHODE RAY TUBE DISPLAY WITH AN IMAGE OF A FIXED RETURN PATTERN WITH REFERENCE TO THE SAME AXES, WHEREBY BOTH IMAGES ARE FOCUSED ONTO THE CAMERA TUBE SCREEN.