| 摘要 |
1276220 Electro-optical communication system NIPPON SELFOC CO LTD 23 Dec 1970 [29 Dec 1969] 61209/70 Heading G1A Signals from an electric multicore cable C1 are applied to energize respective ones of an array of electrically controlled sources of light in a housing 2 by plugs 81A, and the state of the sources is read after optical transmission through optical fibre 1 of the light, by a planar array of photocells in a unit 3, the electrical outputs from the photo-cells being connected to a multicore cable C2 by plugs 91a engaging sockets in the back of the photo-cell array. The sources may alternatively comprise areas of a screen to which light from a single source is applied by way of signal controlled shutters. The optical fibre has a refractive index which decreases in proportion to the square of the distance from the axis and is self-focussing, but additional lenses may be used. The sources may be electro-luminescent diodes and the cells silicon photo-diodes or C ds cells. The planes at each end may carry both sources and cells for two-way transmission.
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