title: Measurement range analysis in moiré evaluation Fizeau interferometry.
abstract: Fizeau interferograms are evaluated by two-beam phase-stepping algorithms. The sinusoidal intensity profile pattern needed for the application of these algorithms is obtained by low-pass filtering the moiré pattern provided by the superposition of the interferogram onto a Ronchi grid. The phase modulation is performed by the in-plane displacement of the grid by means of a motorized stage. In this research the measurement range of the evaluation method as a function of the maximum derivative of height surfaces is calculated. A spherical surface is measured in different configurations in order to verify the obtained results.
authors.forename: B V
authors.initials: BV
authors.lastname: Dorrío
authors.forename: C
authors.initials: C
authors.lastname: López
authors.forename: A F
authors.initials: AF
authors.lastname: Doval
authors.forename: J M
authors.initials: JM
authors.lastname: Alén
authors.forename: J
authors.initials: J
authors.lastname: Bugaríin
authors.forename: A
authors.initials: A
authors.lastname: Fernández
authors.forename: J
authors.initials: J
authors.lastname: Blanco-García
authors.forename: J L
authors.initials: JL
authors.lastname: Fernández
authors.forename: M
authors.initials: M
authors.lastname: Pérez-Amor