{"id":{"repo_id":"nps","oai_identifier":"oai:calhoun.nps.edu:10945/13054"},"canonical_url":"https://search.dev.ndltd.org/etd/nps/oai:calhoun.nps.edu:10945/13054","repository":{"repo_id":"nps","name":"Naval Postgraduate School","base_url":"https://calhoun.nps.edu/server/oai/request"},"display":{"title":"A solid-state ultrasonic image converter","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.","abstract_html":"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.","abstract_has_math":false,"creators":["Larkin, Robert Joseph"],"institution":"Monterey, California. Naval Postgraduate School","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":[],"advisors":["Sackman, George L."],"committee_chairs":[],"committee_members":[],"year":1968,"date_issued":"1968-06","date_published":"1968-06","updated_at":"2026-07-27T20:25:31Z","subjects":[],"languages":["en_US"],"rights":["This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States."],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://hdl.handle.net/10945/13054","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.advisor","label":"Advisor","values":["Sackman, George L."]},{"key":"dc:creator","label":"Author","values":["Larkin, Robert Joseph"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2012-08-29T23:35:35Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2012-08-29T23:35:35Z"]},{"key":"dc:date.issued","label":"Date","values":["1968-06"]},{"key":"dc:publisher","label":"Institution","values":["Monterey, California. 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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."]},{"key":"dc:title","label":"Title","values":["A solid-state ultrasonic image converter"]}]}],"canonical_facts":{"dc:contributor.advisor":["Sackman, George L."],"dc:creator":["Larkin, Robert Joseph"],"dc:date.accessioned":["2012-08-29T23:35:35Z"],"dc:date.available":["2012-08-29T23:35:35Z"],"dc:date.issued":["1968-06"],"dc:description.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."],"dc:identifier.uri":["https://hdl.handle.net/10945/13054"],"dc:language.iso":["en_US"],"dc:publisher":["Monterey, California. Naval Postgraduate School"],"dc:rights":["This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States."],"dc:title":["A solid-state ultrasonic image converter"],"dc:type":["Thesis"]},"updated_at":"2026-07-27T20:25:31Z"}