IMPROVED DESIGN FOR ISOCON CAMERAS IN THE HERTR SYSTEM

THE ISOCON IS A UNIQUE CAMERA TUBE AND PARTICULARLY USEFUL FOR X-RAY APPLICATIONS. THE PROBLEM WITH THE HERTR CAMERA SYSTEM IS NOT WITH THE TUBE BUT RATHER WITH THE CAMERA DESIGN. THE PROPOSAL SUGGESTS THAT THE CAUSE OF THEEARLY TUBE FAILURE BE ISOLATED, AND WITH THIS INFORMATION, A NEW CAMERA BE DESIGNED WHICH REMOVES THIS WEAKNESS AND INCORPORATES INTO THE DESIGN THE LATEST IMPROVEMENTS IN SOME OF THE MAJOR COMPONENTS, I.E. CAMERA YOKE, AND HIGH VOLTAGE SUPPLIES, WHICH ARE BELIEVED TO UNDERLY THE CURRENT CAMERA'S DEFICIENCIES. THIS INVESTIGATOR HAS EXPERIENCED THE SAME TYPE OF PROBLEM WITH THE PREVIOUS ISOCON CAMERA DESIGNS. THE PROBLEM WAS REMOVED AND NOW THERE ARE APPROXIMATELY 80 OF THESE CAMERAS INSTALLED WORLDWIDE. SINCE 1976 ONLY 2 CAMERA TUBES HAVE FAILED. THESE CAMERAS ARE INSTALLED IN INDUSTRIAL ENVIRONMENTS. THE NAVY HAS ONE OF THESE CAMERAS AT NWC CONCORD, CA.