Optical object locating system

Claim 1

APPARATUS FOR DISPLAYING THE RANGE OF OBJECTS IN A FIELD OF VIEW COMPRISING; FIRST AND SECOND MIRRORS EACH HAVING NO MORE THAN A SINGE PLANE SURFACE EACH AND MOUNTED IN FIXED ANGULAR RELATIONSHIP TO EACH OTHER ON A COMMON AXIS, A SOURCE FOR TRANSMITTING A NARROW BEAM OF RADIANT ENERGY TOWARD SAID FIRST MIRROR FOR ILLUMINATING A PORTION OF SAID FIELD OF VIEW, THE POSITION OF THE PORTION SO ILLUMINATED BEING DEPENDENT UPON THE ROTATIONAL POSITION OF SAID FIRST MIRROR ON SAID AXIS, AN OPTICAL SYSTEM, INCLUDING SAID SECOND MIRROR FOR RECEIVING RADIANT ENERGY RE-FLECTED BY OBJECTS IN SAID PORTION OF SAID FIELD SO ILLUMINATED, SAID SECOND MIRROR POSITIONED AND ORIENTED FOR FORMING AN IMAGE OF OBJECTS WITHIN THE ILLUMINATED PORTION WHEREBY THE AXIS OF SAID IMAGE IS COINCIDENT WITH SAID COMMON AXIS WHEN SAID MIRRORS ARE STATIONARY, MEANS FOR ROTATING SAID MIRRORS IN SYNCHRONISM WITH EACH OTHER AT A KNOWN SPEED WHEREBY SAID BEAM OF RADIANT ENERGY REFLECTED BY SAID SAID FIRST MIRROR SCANS SAID FIELD OF VIEW AND THE ENERGY RE-FLECTED BY OBJECTS WITHIN SAID FIELD OF VIEW SO SCANNED IS RECEIVED BY SAID SECOND MIRROR AFTER ROTATIONAL MOVEMENT OF SAID MIRRORS, THE AMOUNT OF WHICH IS DEPENDENT UPON THE RANGE OF THE OBJECTS WITHIN THAT PORTION OF THE FIELD OF VIEW SO ILLUMINATED DURING SAID SCAN AND WHEREBY THE ROTATIONAL MOVEMENT OF SAID MIRRORS BETWEEN THE TIME OF TRANSMISSION AND THE TIME OPF RECEPTATION OF THE SAME ENERGY DISPLACES THE IMAGE SO FORMED FROM SAID COMMON AXIS IN ACCORDANCE WITH THE RANGE OF THE OBJECT AND SAID DISPLACEMENT IS A MEASURE OF RANGE.