The use of television for the microscopical examination of radioactive metals

Closed circuit television for relaying the image produced by remotely controlled microscopes enclosed within thick lead shields, and used for the examination of highly radioactive irradiated fissile materials, e.g. uranium 235, is described. Brief details are given of two installations incorporating respectively c.p.s. emitron, and image orthicon camera chains. A device is described which accurately measures the microstructural features displayed on the monitor screens. The advantages and disadvantages of television compared with optical viewing are discussed, and brief mention is made of experiments with television for general remote handling.