Sonic cameras

 

作者: C. H. Jones,   G. A. Gilmour,  

 

期刊: The Journal of the Acoustical Society of America  (AIP Available online 1976)
卷期: Volume 59, issue 1  

页码: 74-85

 

ISSN:0001-4966

 

年代: 1976

 

DOI:10.1121/1.380828

 

出版商: Acoustical Society of America

 

关键词: 3580;3080;3565

 

数据来源: AIP

 

摘要:

Westinghouse is developing two different types of sonic cameras for real time imaging in turbid water. A 2‐MHz side‐look sonic camera has been built for viewing the ocean bottom at angles from 35° to 55°. The plane of the bottom is mapped into an image plane behind the lens. Ninety‐eight line transducers are used in the image plane to form 98 simultaneous beams. Range resolution is determined by time, as in a side‐look sonar, and angular resolution is determined by the lens. A 25‐cm lens obtains resolutions of 1.5 to 6 cm at ranges from 3 to 12 m. A circular‐scan camera has been built to operate at 3 MHz. This camera maps a plane orthogonal to the direction of view into the image plane behind the sonic lens. The image is swept out by a row of 128 transducers rotating in the image plane. A 27‐cm lens makes it possible to achieve resolutions of 1 to 3 cm at ranges from 3 to 9 m. Lens data applicable to both cameras is given and initial pictures taken with both types of cameras are shown.Subject Classification: [43]35.80; [43]30.80; [43]35.65.

 

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