Tracy G Brewer

US Patent:

57868913, Jul 28, 1998

Filed:

Mar 11, 1997

Appl. No.:

8/815180

Inventors:

Christian Jakobsen - Copenhagen, DK
Flemming Pedersen - Farum, DK
Leonardo M. Penn - Norcross GA
Tracy E. Brewer - Charleston SC
Aarne Karp - Hamilton Square NJ
David H. Smithgall - East Windsor NJ

Assignee:

Lucent Technologies Inc. - Murray Hill NJ

International Classification:

G01N 2100
G01N 2184
G01B 910

US Classification:

356237

Abstract:

The present invention provides an optical detection system for detecting defects in an optical fiber. The system includes a light source for coupling light into the secondary coating of an optical fiber at a preselected angle with respect to the longitudinal axis of the fiber and an optical detector positioned adjacent the fiber at a preselected distance from the point at which the light is coupled into the fiber coating. In accordance with one embodiment, the light is coupled into the fiber coating at a sufficiently shallow angle with respect to the longitudinal axis of the fiber to cause the light to travel through the coating in a direction substantially parallel to the axis of the optical fiber for some distance before exiting the coating. By placing the detector a preselected distance from the coupling point, detection of light reflected from the fiber at the coupling spot is avoided and only light reflected by defects contained in the primary or secondary coating layers, or light reflected by delaminations between the primary coating layer and the fiber, will be detected by the detector.

US Patent:

51112892, May 5, 1992

Filed:

Apr 27, 1990

Appl. No.:

7/515104

Inventors:

Gary L. Lucas - Columbia SC
Tracy E. Brewer - Charleston SC

International Classification:

H04N 718

US Classification:

358108

Abstract:

A vehicular surveillance system comprising a video recorder and monitor in a housing mounted within the passenger compartment of the vehicle to a bracket and a small camera rotatably mounted to the windshield of the vehicle. An FM microphone transmits audio signals to the vehicle's antenna whence it is carried to the recorder by a cable and added to the video images. Date and time information is superimposed on the video image on the top right of the image so as to interfere as little as possible with the image being recorded. The video recorder has a locking mechanism to prevent ejecting the video cassette by unauthorized personnel and its on/off switch is combined with the start record/stop recording function so that one button applies power to the system and starts the recording after a short delay. The housing may be removed from the vehicle for portable use in presenting recorded events as evidence and both video recorder and monitor may operate on the car battery or standard household current.

US Patent:

58284486, Oct 27, 1998

Filed:

Mar 11, 1997

Appl. No.:

8/814673

Inventors:

Christian Jakobsen - Copenhagen, DK
Flemming Pedersen - Farum, DK
Leonardo M. Penn - Norcross GA
Tracy E. Brewer - Charleston SC
Aarne Karp - Hamilton Square NJ
David H. Smithgall - Windsor NJ

Assignee:

Lucent Technologies Inc. - Murray Hill NJ

International Classification:

G01N 2100
G01N 2184
G01B 910

US Classification:

356237

Abstract:

The present invention provides an optical detection system for detecting defects in an optical fiber. The system includes a light source for coupling light into the secondary coating of an optical fiber at a preselected angle with respect to the longitudinal axis of the fiber and an optical detector positioned adjacent the fiber at a preselected distance from the point at which the light is coupled into the fiber coating. In accordance with one embodiment, the light is coupled into the fiber coating at a sufficiently shallow angle with respect to the longitudinal axis of the fiber to cause the light to travel through the coating in a direction substantially parallel to the axis of the optical fiber for some distance before exiting the coating. By placing the detector a preselected distance from the coupling point, detection of light reflected from the fiber at the coupling spot is avoided and only light reflected by defects contained in the primary or secondary coating layers, or light reflected by delaminations between the primary coating layer and the fiber, will be detected by the detector.