Accession Number : ADC009287

Title :   Submarine-To-Aircraft Signalling With A Submergible Transmitter Of High-Intensity, Short-Duration Light Pulses.

Descriptive Note : Interim rept.,

Corporate Author : NAVAL RESEARCH LAB WASHINGTON DC

Personal Author(s) : Stamm, G. L.

Report Date : 15 MAY 1959

Pagination or Media Count : 25

Abstract : A submergible transmitter has been designed and built for automatically generating repetitive high-intensity, short-duration light pulses. When installed on the deck of a submarine for underwater signalling tests, it is easily operated by means of a control panel within the submarine. This transmitter has been employed during underwater-to-air signalling exercises at sea for collecting range data. Most of the components are mounted inside a 200-pound steel cylinder with a 9-3/4-inch-diameter window at one end. Covering the window, through which the light-pulse beam passes, is a 1-inch-thick disk of Pyrex glass which limits the maximum depth of submergence in water to 150 feet. Immediately beneath the window is a flashtube mounted coaxially in a parabolic reflector so that a light-pulse beam having a maximum peak luminous intensity of 18 million candelas is produced.

Descriptors :   *UNDERWATER COMMUNICATIONS, *OPTICAL COMMUNICATIONS, SEA WATER, LIGHT TRANSMISSION, LIGHT PULSES, SHORT PULSES, HIGH INTENSITY.

Subject Categories : SUBMARINE ENGINEERING
      ACOUSTICS
      NON-RADIO COMMUNICATIONS

Distribution Statement : APPROVED FOR PUBLIC RELEASE

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