Stabilized radiation detector

Claim 1

IN A RADIATION DETECTING SYSTEM, A FIRST SCINTILLATION PHOSPHOR ADAPTED TO RECEIVE INCIDENT RADIATION AND TO PRODUCE FIRST FLASHES OF LIGHT IN RESPONSE THERETO, A SECOND SCINTILLATION PHOSPHOR AND A STANDARD RADIATION SOURCE MOUNTED COOPERATIVELY THEREWITH WHEREBY SAID SECOND SCINTILLATION PHOSPHOR EMITS STANDARD LIGHT FLASHES IN RESPONSE TO THE RADIATION EMITTED BY SAID STANDARD SOURCE, A PHOTOELECTRIC DEVICE ADAPTED TO RECEIVE SAID FIRST FLASHES AND SAID STANDARD FLASHES AND TO PRODUCE FIRST ELECTRIC IMPULSES HAVING MAGNITUDES REPRESENTING THE RESPECTIVE INTENSITIES OF SAID FIRST FLASHES AND SECOND ELECTRICAL IMPULSES HAVING MAGNITUDES REPRESENTING THE INTENSITIES OF SAID STANDARD FLASHES, AN OPTICAL ATTENUATING SYSTEM POSITIONED BETWEEN SAID FIRST SCINTILLATION PHOSPHOR AND SAID PHOTOELECTRIC DEVICE FOR SELECTIVELY ATTENUATING SAID FIRST LIGHT FLASHES AS THEY PASS THEREBETWEEN, WHEREBY SAID FIRST ELECTRICAL IMPULSES HAVE MAGNITUDES SMALLER THAN SAID SECOND