Optics: measuring and testing – By light interference – Having polarization
Reexamination Certificate
2006-09-12
2006-09-12
Toatley, Jr., Gregory J. (Department: 2877)
Optics: measuring and testing
By light interference
Having polarization
Reexamination Certificate
active
07106452
ABSTRACT:
A wavefront measuring device is disclosed which is capable of measuring an average wavefront and the retardation of a lens including birefringence. The measuring device includes a light source for emitting a linearly polarized light; a polarization orientation setting member for switching the polarization orientation of the light flux from the light source between at least two orientations; a light synthesizing member for synthesizing the light flux after passing the light fluxes through an object to be measured and a reference surface; an analyzer for switching the polarization orientation so as to pass only the same polarized component as the polarized light incident on the object to be measured; an image pickup member for detecting interference information of the light flux obtained through the analyzer; and a calculating section for calculating the average wavefront and/or the retardation of the object to be measured.
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Connolly Patrick
Fitzpatrick ,Cella, Harper & Scinto
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