IEEE publications

Bits and Electrons. The storage of digital information on photographic emulsion is far from a new concept. High-speed optical readout can be achieved from such memories, but the writing of the digital information on the photographic plates is not without its difficulties. Conventional optical techniques are adequate for recording in systems which do not use the maximum storage densities available from emulsion and in which the total capacity remains below 10⁸ bits; however, optical writing is inconveniently slow for memories of 10⁷ bits and over.