| 摘要 |
989, 526. Recording and playback using scintillation processes. AMPEX CORPORATION. June 27, 1963 [July 26, 1962], No. 25679/63. Heading G5R. [Also in Divisions H1 and H4] A record member, stated to resolve information up to 50 mc/s, comprises an aluminium layer 20, optically opaque but transparent to a modulated recording beam of electrons; a layer of scintillating material 18, preferably plastic and consisting principally of (1. 4 Di 2[5 Phenyloxazolyl] Benzene), terphenyl and polyvinyl toluene; either a Lippmann emulsion 14, sensitive to the electron beam and an optically transparent aluminium antielectron-scatter layer 16 or a fine-grain photographic emulsion layer, 14 only; and a base layer 12 of optically transparent terephthalate plastic. An alternative record member, Fig. 2, comprises a mixture of scintillator and emulsion 22 on the base layer 16. The record member 32 is mounted in a vacuum enclosure 28 with access means 36 and scanned with a beam 40 over a single or frame-by-frame raster by means 43. On recording, the light emitted in layer 18 exposes the layer 16 if photographic and proceeds to a photomultiplier 30 for simultaneous monitoring of the input signal, after which the film is developed to a light-and-shade pattern in the layer 16. On playback, an unmodulated beam activates the layer 18 and the emitted light, modulated by the developed layer 16 proceeds to the photomultiplier 30. The systems 28 and 30 may share the same vacuum. |
