Optics: measuring and testing – By dispersed light spectroscopy – With monochromator structure
Reexamination Certificate
2005-04-05
2005-04-05
Evans, F. L. (Department: 2877)
Optics: measuring and testing
By dispersed light spectroscopy
With monochromator structure
C356S328000
Reexamination Certificate
active
06876449
ABSTRACT:
An optical beam having a randomly and unpredictably variable input polarization state propagates through an optical system containing a first optical surface, for example a diffraction grating, a first adjustable mirror, and means for rotating the respective parallel (P) and perpendicular (S) plane polarization components of the optical beam relative to the first optical surface by ninety degrees, thereby generating a polarization rotated optical beam having reversed orientations of the S and P polarization components relative to the input. The optical beam is reflected from the first adjustable mirror, which redirects the optical beam onto an optimized location on the first optical surface, thereby reducing PDL due to propagation through the optical system. In some embodiments the optical beam location on the first adjustable mirror remains substantially constant during adjustment.
REFERENCES:
patent: 20020196496 (2002-12-01), Silveira et al.
“Agilent 8614xB Optical Spectrum Analyzer Family Technical Specifications,” Agilent Technologies, Inc., pp. 1-11, (Feb. 8, 2002).
Clark Stephan R.
Fernandez Lucas M.
Agilent Technologie,s Inc.
Evans F. L.
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