Accession Number : AD0840257

Title :   A SOLID-STATE ULTRASONIC IMAGE CONVERTER.

Descriptive Note : Master's thesis,

Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CA

Personal Author(s) : Larkin, Robert Joseph

Report Date : JUN 1968

Pagination or Media Count : 34

Abstract : Acoustical techniques can be used to obtain underwater images at distances greater than those currently obtained by optical means. Electronic scanning of a mosaic transducer at the focal plane of an acoustic lens enables target image reproduction on a cathode ray tube using intensity modulation. Previous work in developing the required amplifier and gating circuitry has resulted in systems with excessive cabling and of excessive size. This report is a study of the design of a 16-channel printed circuit board immediately adjacent to a linear transducer array so as to eliminate cabling. Microelectronic devices are used to confine all electronics to a 0.26 x 0.26 inch cross-section for each channel. A 32 x 32 element mosaic at 250 kHz could be scanned by a package no larger than 9x9x6 inches. A discussion of performance, size, and costs is included. (Author)

Descriptors :   (*IMAGE CONVERTERS, UNDERWATER SOUND SIGNALS), (*PULSES, ULTRASONIC RADIATION), UNDERWATER SOUND EQUIPMENT, RELIABILITY(ELECTRONICS), TELEVISION DISPLAY SYSTEMS, ANALOG SYSTEMS, COSTS, PRINTED CIRCUITS, RANGE(DISTANCE), RADIOFREQUENCY LENSES, SCANNING, TRANSDUCERS, MICROELECTRONICS, CATHODE RAY TUBES, THESES.

Subject Categories : Electrooptical and Optoelectronic Devices
      Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE