Optics: measuring and testing – By polarized light examination – With birefringent element
Reexamination Certificate
2005-03-15
2008-10-28
Toatley, Jr., Gregory J. (Department: 2877)
Optics: measuring and testing
By polarized light examination
With birefringent element
Reexamination Certificate
active
07443504
ABSTRACT:
A polarization controller is configured to comprise polarization state monitoring section for monitoring polarization states of input light and output light of a variable polarization light element; and a control section, when the positions on a Poincare sphere expressing each of the polarization states monitored by the polarization state monitoring section are at the positions being symmetric or approximately symmetric for the equator of the Poincare sphere, for rotating the Poincare sphere by π by using the earth axis of the Poincare sphere as a rotation axis by changing the azimuth of the optical axis of the variable polarization light element, and also for inverting the changing direction of the phase shift amount. By this, arbitrary and endless control of polarization light can be realized by a phase shift amount being less than the wavelength λ of the input light.
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Miyata Hideyuki
Sone Kyosuke
Yoshida Setsuo
Fujitsu Limited
Staas & Halsey , LLP
Toatley , Jr. Gregory J.
Valentin Juan D
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