Charles J Bell

US Patent:

49758870, Dec 4, 1990

Filed:

Jan 9, 1987

Appl. No.:

7/002832

Inventors:

Bruce S. Maccabee - Silver Spring MD
Charles E. Bell - Rockville MD

Assignee:

The United States of America as represented by the Secretary of the Navy - Washington DC

International Classification:

G01S 1500

US Classification:

367 88

Abstract:

This discloses an improved side-scan sonar capable of locating objects on e ocean floor including the strip directly beneath the sonar transmitter and receiver, which in prior arrangements had to be obtained by another pass. The arrangement includes a platform having acoustic transmitters spaced apart a substantial distance on either side of acoustic receivers. The transmitter on the right directs its acoustic output to the left and the transmitter on the left directs its acoustic output to the right for increased shadow forming and enhanced detection by the receiver of objects of height directly beneath the receiver.

US Patent:

39653552, Jun 22, 1976

Filed:

Oct 23, 1974

Appl. No.:

5/517160

Inventors:

Bruce S. Maccabee - Silver Spring MD
Charles E. Bell - Potomac MD

International Classification:

G01J 100

US Classification:

250341

Abstract:

A laser intrusion system incorporating a relatively long wavelength infra-red laser, a beam path, a quantum amplifier, a detector, and associated optical and electronic components is described. The relatively long wavelength of the laser radiation and the high gain and narrow bandwidth of the quantum amplifier make the system relatively immune to environmental conditions such as fog and rain and particularly applicable for long range, all-weather, outdoor use.