Phase determination of a radiation wave field

Details Phase determination of a radiation wave field Phase determination of a radiation wave field

2005-04-26

2005-04-26

Smith, Zandra V. (Department: 2877)

Optics: measuring and testing

Lamp beam direction or pattern

C250S201900

Reexamination Certificate

active

06885442

ABSTRACT:
A method of quantitative determination of the phase of a radiation wave field including the steps of producing a representative measure of the rate of change of intensity of the radiation wave field over a selected surface extending generally across the wave field; producing a representative measure of intensity of the radiation wave filed over the selected surface; transforming the measure of rate of change of intensity to produce a first integral transform representation and applying to the first integral transform representation a first filter corresponding to the inversion of a first differential operator reflected in the measure of rate of change of intensity to produce a first modified integral transform representation; applying an inverse of the first integral transform to the first modified integral transform representation to produce an untransformed representation; applying a correction based on the measure of intensity over the selected surface to the untransformed representation; transforming the corrected untransformed representation to produce a second integral transform representation and applying to the second integral transform representation a second filter corresponding to the inversion of a second differential operator reflected in the corrected untransformed representation to produce a second modified integral transform representation; and applying an inverse of the second integral transform to the second modified integral transform representation to produce a measure of phase of the radiation wave field across the selected plane.

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