Aberration reduction of acoustic lens for ultrasonic underwater imaging sonar
| Project/Area Number |
21560843
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Naval and maritime engineering
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| Research Institution | 防衛大学校 |
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Principal Investigator |
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| Project Period (FY) |
2009 – 2011
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| Project Status |
Completed (Fiscal Year 2011)
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| Budget Amount *help |
¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2011: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2010: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2009: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
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| Keywords | 海洋探査・機器 / 音響レンズ / 超音波水中映像ソーナー / 超音波 / 水中映像ソーナー / 海洋探査 / ソーナー |
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| Research Abstract |
In this research, an aplanatic acoustic lens which can nearly completely reduce a spherical aberration and a coma aberration for the sound ray which enters in parallel in the paraxial area was designed by the ray tracing method used for the design of optical lenses. Then, the convergence characteristics of the designed aplanatic acoustic lens were evaluated by a numerical calculation method. Next, an aplanatic lens and an aplanatic Fresnel lens which aimed at the weight reducing and low attenuation were made, and the superior convergence characteristics were proved in water tank experiments.
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Report
(4 results)
Research Products
(24 results)
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[Presentation] 軸外し音響単反射鏡の設計2010
Author(s)
佐藤裕治,水谷孝一,若槻尚斗,中村敏明
Organizer
日本音響学会2010年春季研究発表会
Place of Presentation
電通大(東京)
Year and Date
2010-03-10
Related Report
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