Phase-shifting point-diffraction interferometer developed by using the electro-optic effect in ferroelectric crystals.
A novel and simple phase-shifting point-diffraction interferometer using a z-cut lithium niobate wafer is proposed. The pinhole is realized by an optical lithography process, aluminum deposition, and subsequent lift-off on the surface of the wafer. The phase shifting is obtained by inducing the electro-optic effect along the z crystal axis. We demonstrate experimentally the possibility of retrieving an aberrated wavefront.
Paturzo
M
M
Istituto Nazionale di Ottica Applicata del CNR and LENS-European Laboratory for Nonlinear Spectroscopy, Pozzuoli, Italy.
Pignatiello
F
F
Grilli
S
S
De Nicola
S
S
Ferraro
P
P