Passive optical collision warning system

Claim 1

AN OPTICAL COLLISION WARNING SYSTEM FOR A VEHICLE COMPRISING: A LENS MOVABLE THROUGH A PREDETERMINED FIELD OF VIEW, A PLURALITY OF PHOTOCELLS EACH POSITIONED TO OPTICALLY RECEIVE VISIBLE FREQUENCY ENERGY THROUGH SAID LENS AND TO GENERATE A SIGNAL IN RESPONSE TO CHANGES IN INTENSITY OF THE RECEIVED VISIBALE FREQUENCY, A SPACE FILTERING RETICLE IN THE PATH BETWEEN SAID PHOTOCELLS AND SAID LENS FOR MODULATING THE RECEPTION OF LIGHT FREQUENCY ENERGY BY SAID PHOTOCELLS, EACH OF SAID PHOTOCELLS HAVING A FOCUSING LENS WHEREBY SAID CELLS RECEIVE LIGHT FREQUENCY ENERGY IN DIFFERENT POSITIONS OF AZIMUTH, MEANS FOR GENERATING PULSES IN RESPONSE TO CHANGES IN INTENSITY OF THE VISIBLE FREQUENCY ENERGY RECEIVED BY SAID PHOTOCELLS, AN OBJECT POSITION INDICATOR RESPONSIVE OF SAID PULSES, SAID POSITION INDICATOR HAVING A WARNING DISPLAY MOVABLE IN SYNCHRONIZATION WITH SAID MOVABLE LENS, SAID DISPLAY BEING ENERGIZED IN RESPONSE TO SAID PULSES TO THEREBY INDICATE THE DIRECTION OF THE OBJECT CAUSING THE INTENSITY CHANGE, MEANS POSITIONED TO RECEIVE LIGHT FROM SAID DISPLAY TO RETAIN THE OBJECT DIRECTION WHILE SAID DISPLAY CONTINUES TO MOVE, WHEREBY CONTINUED ENERGIZATION OF SAID WARNING DISPLAY WHILE IN THE SAMAE ANGULAR DIRECTION INDICATES A COLLISION COURSE BETWEEN THE VEHICLE AND SAID OBJECT AND ENERAGIZATION OF SAID WARNING DISPLAY WHILE IN ANOTHER ANGULAR DIRECTION WILL INDICATE A NON-COLLISION COURSE.