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[[Image:fringe_ex.jpg|thumb|An Example of a Closed Fringe Pattern]]

[[Image:fringe_ex.jpg|thumb|An Example of a Closed Fringe Pattern]]

Fringe pattern analysis methods can be sorted into two main categories: "temporal (phase shifting) methods and spatial methods." [[#References|[1]]]  According to Kieran G. Larkin, interferogram analysis finds its roots in the 1960's from the work of Carre, Rowley and Harmon, who pioneered the use of former of the two methods described above.  However, this form of analysis was problematic in that the phase shift needed to be precisely calculated (i.e. a large degree of experimental control must be present).  This problem resulted in a wave of spatial analysis methods which took advantage of using single fringe pattersn to obtain the necessary surface information.  With experimental control and computing power increasing, current methods of fringe pattern analysis involve utilizing combinations of both experimental and computer based algorithms to produce more accurate results than were previously attainable [[#References|[1]]].

Fringe pattern analysis methods can be sorted into two main categories: "temporal (phase shifting) methods and spatial methods." [[#References|[1]]]  According to Kieran G. Larkin, interferogram analysis finds its roots in the 1960's from the work of Carre, Rowley and Harmon, who pioneered the use of former of the two methods described above.  However, this form of analysis was problematic in that the phase shift needed to be precisely calculated (i.e. a large degree of experimental control must be present).  This problem resulted in a wave of spatial analysis methods which took advantage of using single fringe pattersn to obtain the necessary surface information.  With experimental control and computing power increasing, current methods of fringe pattern analysis involve utilizing combinations of both experimental and computer based algorithms to produce more accurate results than were previously attainable [[#References|[1]]].