Accession Number : ADD001664

Title :   Laser Controlled Fathometer.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C

Personal Author(s) : Malloy,Richard J

Report Date : 24 Jun 1975

Pagination or Media Count : 6

Abstract : The patent relates to a method and apparatus for underwater depth recording. A laser beam is placed on a datum point impinges upon a plurality of vertically adjacent laser beam receptor cells rigidly affixed to a float. A depth sounding transducer is supported a fixed distance under the float and communicates with a recorder. A plurality of delay circuits respectively connected to the plurality of receptor cells delays a signal from the transducer to the recorder a specific time indicative of the position of the plurality of receptor cells with respect to said datum point whereby an underwater depth recording is made without errors being introduced by surface water disturbances.

Descriptors :   *Fathometers, *Laser beams, *Patents, Photoelectric cells(Semiconductor), Delay circuits, Transducers, Oceanographic equipment, Recording systems, Signal processing

Subject Categories : Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE