Film-Data Recording Using Electroluminescent Diodes: Design Considerations

Electroluminescent, light-emitting diodes and their light emission have been known for some time. It is only recently, however, that the art of manufacture and processing of visible emission materials has made them available for field utilization. Many applications are of special interest for the motion-picture film-recording and instrumentation fields, since these devices may be used for high-reliability data recording of various electrical information on motion-picture film. With the availability of these highly developed light sources, compact and efficient high-frequency code-writing methods and equipment are available for all workers in the field. Of the types of solid-state lamps discussed, there are two main families, the gallium arsenide phosphide and the silicon carbide types, both of which have peculiarities in terms of their electrical configurations, their physical structures, and various light output levels and characteristics. This paper evaluates techniques for each type of device, the use of these light-emitting diodes for computer-compatible coding, and methods of writing this code on the film emulsion.

Print ISSN

0361-4573

Published

1969-11

Content type

Original Research

DOI

10.5594/J10782