Accession Number : AD0743091

Title :   Electro-Optical Multichannel Sonar Recorder/Reproducer. Phase II.

Descriptive Note : Interim rept. Feb 71-Jan 72,

Corporate Author : NAVAL TRAINING DEVICE CENTER ORLANDO FLA

Personal Author(s) : McKechnie,John C.

Report Date : 01 MAY 1972

Pagination or Media Count : 60

Abstract : A study was conducted to establish the preliminary design of a low tape speed, highly durable, multichannel sonar-audio recorder/reproducer for U.S. Navy Sonarman training. Interim results by analysis and by laboratory experimentation on a partial model of the multichannel electro-optical recorder indicates thus far, that an operational model can be satisfactorily built. The unit records 16 audio channels on 1/4 inch wide photographic film. This is done by modulating light emitting diodes (LED's) with the signal to be recorded. Emitted light from the LEDs is guided onto the film by 0.003 to 0.010 inch diameter optical fiber light guides. Evidence from this study justifies a directed effort toward building a fully operational unit having 450 parallel channels, and a bandwidth of 10 Hz to 10 kHz. (Author)

Descriptors :   (*PHOTOGRAPHIC RECORDING SYSTEMS, SONAR SIGNALS), (*TRAINING DEVICES, *SONAR EQUIPMENT), PHOTOGRAPHIC FILM, ELECTROOPTICS, FIBER OPTICS, PHOTODIODES, CIRCUITS, FEASIBILITY STUDIES

Subject Categories : Humanities and History
      Recording and Playback Devices
      Acoustic Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE