Wide band optical recording and narrow band reproduction on a thermo-plastic medium

Claim 1

A SYSTEM FOR RECORDING AND READING INFORMATION COMPRISING AN OPTICAL MEDIUM IN THE FORM OF A PLASTIC TAPE WHICH IS DEFORMABLE IN ACCORDANCE WITH ELECTRIC CHARGE, AN ELECTRON BEAM GENERATING MEANS PRODUCING AN ELECTRON BEAM DEFLECTED TO DEPOSIT SUCCESSIVE LINES OF ELECTRIC CHARGE ON SAID TAPE, FURTHER DEFLECTION MEANS IMPARTING AN OSCILLATORY CHANGE IN THE CONCENTRATION OF CHARGE DEPOSITED TO CONTROL THE FORMATION OF THICKNESS DEFORMATION DIFFRACTION GRATINGS ALONG SAID LINES IN SAID TAPE IN RESPONSE TO CINTINUOUS WIDE BAND INPUT INFORMATION HAVING DIFFERENT SPACINGS CORRESPONDING RESPECTIVELY TO DIFFERENT FREQUENCIES IN SAID WIDE BAND INPUT AND CAPABLE OF DIFFRACTING MONOCHROMATIC LIGHT BY DIFFERENT AMOUNTS, MEANS FOR MOVING SAID TAPE IN A DIRECTION SUBSTANTIALLY ORTHOGONAL TO SAID LINES SO THAT A PLURALITY OF ADJACENT LINES ARE SUCCESSIVELY RECORDED, AN OPTICAL SYSTEM INCLUDING A LIGHT MEANS FOR ILLUMINATING SAID TAPE, AN APERTURE FOR EXCLUDING ALL BUT ONE OF SAID LINES AT A TIME FROM SAID OPTICAL SYSTEM AS SAID TAPE IS MOVED, ADJUSTABLE MEANS FOR BLOCKING ALL BUT THE LIGHT DEVIATION PRODUCED BY GRATINGS CORRESPONDING TO A NARROW BAND OF SAID FREQUENCIES OF SAID WIDE BAND INPUT IN SUCCESSIVE LINES AS SAID TAPE IS MOVED, AND DETECTION MEANS RESPONSIVE TO THE UNBLOCKED LIGHT TO READ OUT ONLY A NARROW BAND OF THE INFORMATION RECORDED.

Claim 2

A SYSTEM FOR RECORDING AND READING INFORMATION COMPRISING AN OPTICAL MEDIUM IN THE FORM OF A PLASTIC TAPE WHICH IS DEFORMABLE IN ACCORDANCE WITH ELECTRIC CHARGE, AN ELECTRON BEAM GENERATING MEANS PRODUCING AN ELECTRON BEAM DEFLECTED TO DEPOSIT SUCCESSIVE LINES OF ELECTRIC CHARGE ON SAID TAPE, FURTHER DEFLECTION MEANS IMPARTING AN OSCILLATORY CHANGE IN THE CONCENTRATION OF CHARGE DEPOSITED TO CONTROL THE FORMATION OF THICKNESS DEFORMATION DIFFRACTION GRATINGS ALONG SAID LINES IN SAID TAPE IN RESPONSE TO CINTINUOUS WIDE BAND INPUT INFORMATION HAVING DIFFERENT SPACINGS CORRESPONDING RESPECTIVELY TO DIFFERENT FREQUENCIES IN SAID WIDE BAND INPUT AND CAPABLE OF DIFFRACTING MONOCHROMATIC LIGHT BY DIFFERENT AMOUNTS, MEANS FOR MOVING SAID TAPE IN A DIRECTION SUBSTANTIALLY ORTHOGONAL TO SAID LINES SO THAT A PLURALITY OF ADJACENT LINES ARE SUCCESSIVELY RECORDED, AN OPTICAL SYSTEM INCLUDING A LIGHT MEANS FOR ILLUMINATING SAID TAPE, AN APERTURE FOR EXCLUDING ALL BUT ONE OF SAID LINES AT A TIME FROM SAID OPTICAL SYSTEM AS SAID TAPE IS MOVED, ADJUSTABLE MEANS FOR BLOCKING ALL BUT THE LIGHT DEVIATION PRODUCED BY GRATINGS CORRESPONDING TO A NARROW BAND OF SAID FREQUENCIES OF SAID WIDE BAND INPUT IN SUCCESSIVE LINES AS SAID TAPE IS MOVED, AND DETECTION MEANS RESPONSIVE TO THE UNBLOCKED LIGHT TO READ OUT ONLY A NARROW BAND OF THE INFORMATION RECORDED.