Ralph E Frazee, Age 821924 Yankee Clipper Run, The Villages, FL 32162

6313909, Nov 6, 2001

Apr 20, 1999

9/295297

Ralph Edward Frazee - Bricktown NJ
David Harry Smithgall - East Windsor NJ

Lucent Technologies Inc. - Murray Hill NJ

G01N 2100

356 731

Methods and apparatus for detecting defects, such as air lines, in optical waveguide fibers are provided. The methods and apparatus employ scattered light interference signals produced by a fiber clad measurement system that transversely illuminates a fiber with a laser beam. Defects in the fiber produce characteristic peaks in the frequency spectrum of the scattered light signal. By filtering the scattered light signal to remove (a) the components associated with the fiber clad measurement system and (b) the fundamental component associated with the fiber, the defect-related components in the scattered light signal which represent defects in the associated fiber are determined. Once the presence of these defect-related components is determined, a defect detection output pulse is generated for each such event. The defect detection methods are also incorporated in an overall system for drawing and inspecting the optical lightguide fibers.

4195791, Apr 1, 1980

May 18, 1979

6/040026

Ralph E. Frazee - Spotswood NJ

Western Electric Company, Incorporated - New York NY

B65H 5938

242 45

A CCTV camera 32 monitors the sag of a loop of optical fiber 11 extending between a drawing mechanism 12 and a takeup spool 18. The camera is rotated 90. degree. about its optical axis so as to vertically scan the plane of the fiber catenary and forward the video scan signal to a video signal processor 28. The processor continuously determines the displacement of the lowest point of the loop from an optimum position and generates an electrical signal proportional thereto. The signal is forwarded to a spooling motor 19 to adjust the speed of the takeup spool to cause the fiber catenary to return to a predetermined position.

4957526, Sep 18, 1990

Jun 2, 1989

7/381375

Ralph E. Frazee - Bricktown NJ
David H. Smithgall - East Windsor NJ

AT&T Bell Laboratories - Murray Hill NJ

C03B 3707
C03C 2502

65 311

In accordance with the invention, the functions of two TV cameras in the prior art for monitoring polymer coating concentricity and/or carbon coating thickness are accomplished by a single TV camera (48). Rather than being projected onto an opaque dispersive screen, the forward-scattered mode pattern of each of the orthogonal beams (57,58) is transmitted through a translucent screen (52,53) and reflected to an image combining device (67) which transmits both patterns to the single TV camera (48). The two beams are slightly vertically displaced to establish displaced images (72,73) of the two patterns. This allows the two patterns to be viewed simultaneously and distinguished by the TV camera. Modified electronics (FIG. 10) provide for alternate TV scanning of the two images so that a computer (22) can monitor and correct concentricity and/or carbon coating thickness in real time during fiber production.

4973343, Nov 27, 1990

Jun 2, 1989

7/360970

Ralph E. Frazee - Bricktown NJ
David H. Smithgall - East Windsor NJ

AT&T Bell Laboratories - Murray Hill NJ

C03B 3707

65 1

In accordance with the invention, the functions of two TV cameras in the prior art for monitoring polymer coating concentricity and/or carbon coating thickness are accomplished by a single TV camera (48). Rather than being projected onto an opaque dispersive screen, the forward-scattered mode pattern of each of the orthogonal beams (57,58) is transmitted through a translucent screen (52,53) and reflected to an image combining device (67) which transmits both patterns to the single TV camera (48). The two beams are slightly vertically displaced to establish displaced images (72,73) of the two patterns. This allows the two patterns to be viewed simultaneously and distinguished by the TV camera. Modified electronics (FIG. 10) provide for alternate TV scanning of the two images so that a computer (22) can monitor and correct concentricity and/or carbon coating thickness in real time during fiber production.