Image intensifier camera tube for gamma - radiation

• Main Authors: J. LIEBER,ALBERT, A. TRUMP,MICHAEL
• Format: Patent
• Language: English; German
• Published: 21.01.1971
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS; ELECTRICITY; MEASUREMENT OF NUCLEAR OR X-RADIATION; MEASURING; PHYSICS; TESTING

A pick up crystal of scintillator material sensitive to nuclear radiation is exposed to an image of such radiation. In the material of the crystal the nuclear radiation is absorbed and converted into energy in the visible optical spectrum thus producing a corresponding visual image. A proportion of the photons produced within the crystal are internally reflected due to the finite thickness of the crystal and these photons migrate to the periphery. The camera has an electron-optical path for image intensification. An optical shunt path, separated from the first electron optical path, and this shunt path includes means for taking the above internally reflected photons and for amplifying them so that a second electron optical path is formed, separate from the first, used for image intensification and bypassing the first. The intensified optical picture output and the amplified photon output from the shunt path are added in a summing circuit the output of which represents the energy of the incident nuclear radiation.