EG&G, Ltd.

City: Wokingham
State/Country: GB2

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US5149961 - Method and apparatus for optical fiber length determination - 09/22/1992

In a method and apparatus for measuring length of an optical fiber, a light source of a selected wavelength transmitted along the fiber is modulated by both a first and a second light modulation signal, which light modulation signals each differ in frequency from a first modulation frequency by a fixed amount. A time detector responds, alternately during a period, to the light signal as modulated by of each of the first and second light modulation signals by using each of the light signal modulation frequencies as a reference. Consequently, the output of the time detector has a phase responsive to the effective length of the fiber. A phase sensitive detector receives as a signal input an output of the time detector means. A second modulation frequency defines the period of alternation of response and provides a reference input to the phase sensitive detector. The phase sensitive detector measures the ac component of time detector output in phase with the second modulation frequency to provide an indication of fiber length.

Paul
: posted "Please try again. We adjusted the permissions on events." on kwhitman@landon-ip.com's wall

3/16/2010

kwhitman@landon-ip.com
: posted "Hi Paul, Unfortunately when I attempt to delete or edit one of my events via the method you described, the system tells me that I "do not have permission." How can I get around this restriction? Thanks Kristin" on KKyrylyuk
posted a blog US7661445 Offers Better Protection Against Radiation Leakage in X-Ray Machines

3/14/2010

Paul
: posted "Deleting and Event you can perform from your account page. Login and go to My Account. Click on the Events Tab Select the Event you want to delete via the check-box. Then click the Delete Selected box. Hope that helps." on KKyrylyuk
posted a blog Options for DNA Sequence Testing Used in Diagnosing Tuberculosis

3/12/2010

Independent Contractors and Principals: Who Owns the Copyright?

by GeneralCounsel on 1/18/2010
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Legal summary of who owns software code when independent contractor involved
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