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Proceedings Paper

Acoustic lens-based swimmer's sonar
Author(s): Thomas E. Linnenbrink; Charles S. Desilets; Donald L. Folds; Marshall K. Quick
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Paper Abstract

A new high resolution imaging sonar is begin developed for use by swimmers to identify objects in turbid water or under low light level conditions. Beam forming for both the transmit and receive functions is performed with acoustic lenses. The acoustic image is focused on an acoustic retina or focal pane. An acoustic video converter converts the acoustic image to an electronic from suitable for display with conventional electronics. The image will be presented to the swimmer as a heads-up display on the face of his or her mask. The system will provide 1 cm resolution in range and cross range from 1-5 meters from the object. A longer range search mode is being explored. Laboratory prototypes of key components have been fabricated and evaluated. Results to date are promising.

Paper Details

Date Published: 23 July 1999
PDF: 14 pages
Proc. SPIE 3711, Information Systems for Navy Divers and Autonomous Underwater Vehicles Operating in Very Shallow Water and Surf Zone Regions, (23 July 1999); doi: 10.1117/12.354665
Show Author Affiliations
Thomas E. Linnenbrink, Q-Dot, Inc. (United States)
Charles S. Desilets, Ultrex Corp. (United States)
Donald L. Folds, Ultra-Acoustics, Inc. (United States)
Marshall K. Quick, Q-Dot, Inc. (United States)


Published in SPIE Proceedings Vol. 3711:
Information Systems for Navy Divers and Autonomous Underwater Vehicles Operating in Very Shallow Water and Surf Zone Regions
Jody L. Wood-Putnam, Editor(s)

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