2011 Fiscal Year Final Research Report
Aberration reduction of acoustic lens for ultrasonic underwater imaging sonar
| Project/Area Number |
21560843
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
Naval and maritime engineering
|
|---|
| Research Institution | 防衛大学校 |
|---|
Principal Investigator |
|
|---|
| Project Period (FY) |
2009 – 2011
|
| Keywords | 海洋探査・機器 / 音響レンズ / 超音波水中映像ソーナー |
|---|
| 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.
|
Research Products
(16 results)
