Birefringent fibers orientation measurement

Details Birefringent fibers orientation measurement Birefringent fibers orientation measurement

2011-07-26

2011-07-26

Nguyen, Tu T (Department: 2886)

Optics: measuring and testing

For optical fiber or waveguide inspection

Reexamination Certificate

active

07986401

ABSTRACT:
Methods and apparatus to determine the orientation of randomly arranged birefringent fibers are disclosed. One method comprises emitting light, creating Nipolarization states of the emitted light, illuminating the birefringent fibers with the emitted light so polarized, thereby generating IRiinternal reflection components of the light in the birefringent fibers, observing the light from the illuminated birefringent fibers, creating Oipolarization states of the observed light, forming Iiimages of the observed polarized light, each image comprising an information (Ni, Oi, IRi), wherein i=1, 2, . . . , n and n≧3, separating the i-th internal reflection component from the i-th image, and calculating an angle of a neutral axis of the birefringent fibers using the IRiinternal reflection components.

REFERENCES:
patent: 6611369 (2003-08-01), Matsushita et al.
patent: 7289210 (2007-10-01), Jang

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