DocumentCode :
1050034
Title :
Opto-acoustic feasibility design of a conical acoustic lens
Author :
Stimler, Morton
Author_Institution :
Naval Surface Weapons Center, Silver Spring, MD, USA
Volume :
3
Issue :
2
fYear :
1978
fDate :
4/1/1978 12:00:00 AM
Firstpage :
45
Lastpage :
48
Abstract :
The opto-acoustic design of a liquid-filled conical acoustic lens is discussed. An approximate model of stacked cylindrical elements is used to estimate the focal line. Final optimization is to be achieved experimentally. Diffraction enables point hydrophones to cover a vertical range of 
. An iterative optimization procedure yields cone angle and window aperture size that give diffraction patterns to accomplish this with 3-dB maximum loss at the extreme elevations. Baffles are positioned by a ray-tracing analysis to minimize internal acoustic reflections. Reflection losses <1 dB are predicted above the critical angle (for total internal reflection) at the water-window boundary.
. An iterative optimization procedure yields cone angle and window aperture size that give diffraction patterns to accomplish this with 3-dB maximum loss at the extreme elevations. Baffles are positioned by a ray-tracing analysis to minimize internal acoustic reflections. Reflection losses <1 dB are predicted above the critical angle (for total internal reflection) at the water-window boundary.Keywords :
Lenses; Underwater acoustics; Acoustic diffraction; Acoustic reflection; Acoustic signal detection; Apertures; Lenses; Optical design; Optical diffraction; Optical reflection; Sonar equipment; Underwater acoustics;
fLanguage :
English
Journal_Title :
Oceanic Engineering, IEEE Journal of
Publisher :
ieee
ISSN :
0364-9059
Type :
jour
DOI :
10.1109/JOE.1978.1145371
Filename :
1145371
Link To Document :
