Scanning device for tracker using concentric photosensitive surfaces cooperating with oscillated image

Claim 1

A LIGHT TRACKING DEVICE FOR TRACKING A LIGHT SOURCE COMPRISING A TELESCOPE OBJECTIVE FOR PRODUCING AN IMAGE OF SAID LIGHT SOURCE; A TRANSPARENT OPTICAL WEDGE; MOTOR MEANS FOR ROTATING SAID OPTICAL WEDGE ABOUT A CENTRAL AXIS GENERALLY PERPENDICULAR THERETO; AND PHOTOCELL MEANS HAVING FIRST AND SECOND SPACED AND INSULATED PHOTOSENSITIVE SURFACES; SAID TELESCOPE OBJECTIVE HAVING AN OPTICAL AXIS; SAID OPTICAL AXIS OF SAID TELESCOPE OBJECTIVE BEING COLINEAR WITH SAID CENTRAL AXIS OF SAID OPTICAL WEDGE; SAID FIRST AND SECOND PHOTOCELL SURFACES BEING POSITIONED IN THE FOCAL PLANE OF SAID TELESCOPE OBJECTIVE AND CENTERED ON SAID OPTICAL AXIS OF SAID TELESCOPE OBJECTIVE; SAID FIRST SURFACE HAVING AN AREA GREATER THAN SAID SECOND SURFACE; THE OUTPUTS OF SAID FIRST AND SECOND AREAS BEING CONNECTED IN OPPOSED POLARITIES; SAID OPTICAL WEDGE HAVING A WEDGE ANGLE SUFFICIENT TO REFRACT LIGHT PASSING THERETHROUGH THROUG A LATERAL EXCURSION OF AT LEAST A DISTANCE EQUAL TO THE LATERAL SPACING OF SAID FIRST AND SECOND SURFACES.