Accession Number : ADD018153

Title :   Optical Motion Sensor for an Underwater Object.

Descriptive Note : Patent, Filed 20 Apr 94, patented 28 May 96,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Mileski, Paul M ; Morency, Roger L

Report Date : 28 May 1996

Pagination or Media Count : 8

Abstract : A system for sensing motion of an object in an underwater environment is provided. The System has a circuit hoard, a light-emitting diode, an infrared filter, an integrated circuit, and an acrylic transparent housing. The light-emitting diode and the integrated circuit are mounted on the circuit hoard. The integrated circuit has a photoelectric transducer and a low-noise amplifier. The housing surrounds and seals the diode, the filter, the integrated circuit, and the hoard from exposure to the underwater environment. The housing also provides a convex lens on one end which corresponds with the direction in which the diode emits infrared radiation. The convex lens spreads the radiation emitted from the diode. The emitted radiation approaches and reflects back from the moving object. The convex lens also spreads this reflected radiation. The infrared filter screens unwanted radiation. The photoelectric transducer converts the filtered radiation into an electrical signal which the low-noise amplifier amplifies. The output of the amplifier is then recorded and correlated to the motion of the object underwater.

Descriptors :   *OPTICAL DETECTORS, *PATENTS, *UNDERWATER OBJECTS, DIODES, OUTPUT, EMISSION, RADIATION, ENVIRONMENTS, LIGHT, MOTION, ACRYLIC RESINS, TRANSPARENCE, INTEGRATED CIRCUITS, REFLECTION, SIGNALS, ELECTRICITY, TRANSDUCERS, MOUNTS, FILTERS, INFRARED RADIATION, LOW NOISE AMPLIFIERS, AMPLIFIERS, LENSES, HOUSING(DWELLINGS), INFRARED FILTERS, PHOTOELECTRICITY, CONVEX BODIES

Subject Categories : Marine Engineering
      Optical Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE