Optics: measuring and testing – By light interference – Having polarization
Reexamination Certificate
2007-05-01
2007-05-01
Toatley, Jr., Gregory J. (Department: 2877)
Optics: measuring and testing
By light interference
Having polarization
Reexamination Certificate
active
10299030
ABSTRACT:
An interferometric measurement device for determining the birefringence in a transparent object comprises an interferometer with an input for an input light beam. At an output of the interferometer an object light beam passing through the object interferometrically superposes with a reference light beam not passing through the object. A positionally resolving measuring instrument determines at the interferometer output a distribution of phase differences between the object light beam and the reference light beam over the beam cross section of the beams. The measurement device further includes an instrument for modifying the polarization state of the input light beam.
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Gödecke Uwe
Schulte Stefan
Carl Zeiss Smt AG
Factor & Lake, Ltd.
Lyons Michael A.
Toatley , Jr. Gregory J.
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