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.

US Patent:

49738380, Nov 27, 1990

Filed:

Apr 24, 1981

Appl. No.:

6/257433

Inventors:

Charles E. Bell - Potomac MD
Jay S. Hall - Annapolis MD

Assignee:

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

International Classification:

H01J 314

US Classification:

250234

Abstract:

A pulsed laser beam aiming apparatus is configured such that substantially 00% of the energy from a pulsed laser beam from a Q-switched pulsed laser device is accurately aimed at a distant target/obstacle in space. The pulsed laser beam is reflected off of a multifaceted polygonal mirror spinning about its axis and perpendicularly affixed to a rotatable azimuthal table wherein the spinning mirror provides elevational orientation, and, in conjunction with the rotatable azimuthal table, azimuthal orientation. Control circuit and associated equipment cause the Q-switched pulsed laser device to be triggered on when a facet of the mirror is in the proper elevational and azimuthal orientation for the pulsed laser beam to hit the target/obstacle. Correct aiming of the pulsed laser beam at the target/obstacle is accomplished when the coordinates thereof are specific only as an elevational angle. +-. 5 above and/or below the horizon and an azimuthal angle between 0. degree. and 360. degree.