초록 ▼

A large area video camera is suitable for high energy imaging applications. The sensor-target of the camera tube is composed of TlBr, TlI, PbI2, or PbBr2 or a two layer structure comprising CsI and a photoconductive layer of materials such as amorphous silicon, amorphous selenium, cadmium sulphide,

A large area video camera is suitable for high energy imaging applications. The sensor-target of the camera tube is composed of TlBr, TlI, PbI2, or PbBr2 or a two layer structure comprising CsI and a photoconductive layer of materials such as amorphous silicon, amorphous selenium, cadmium sulphide, antimony trisulfide or antimony sulphide oxysulphide. A disclosed tube incorporates various modifications for dealing with problems associated with stray capacitance, premature electron leakage and secondary electron emission.

대표청구항 ▼

An imaging tube comprising: sensor-target means comprising signal plate means for detecting irradiating high energy photons and providing storage capacity to hold electrons on the surface of said sensor-target means, said sensor-target means comprising a layer substantially composed of material sele

An imaging tube comprising: sensor-target means comprising signal plate means for detecting irradiating high energy photons and providing storage capacity to hold electrons on the surface of said sensor-target means, said sensor-target means comprising a layer substantially composed of material selected from the group consisting of PbI2, PbBr2 and a PbI2 and PbBr2 mixture, which layer receives incident high energy radiation and causes the generation of internal electronic positive carriers in quantities which are greater than the number of incident photons of said radiation; electron optics means for generating a low velocity electron beam and directing said beam at said sensor-target means to deposit a uniform layer of charge; so that high energy radiation directed at said sensor-target means produces a charge redistribution at said sensor-target means surface for generating a signal for transmittal to a read-out circuit.