par De Schryver, Fabien ;Biran, Bernard ;Dubois, Fabien
Référence Applied optics, 29, 7, page (944-948)
Publication Publié, 1990
Article révisé par les pairs
Résumé : A new type of differential interferometer based on holographic optical elements is developed which allows a refractive index gradient field to be determined in two orthogonal directions obtained sequentially with a PLZT electrooptic modulator. The sign of the gradient is unequivocally determined by using a reference fringe pattern added to the interferogram. The sensitivity of the device is easily adjustable by changing the position of only one optical component. © 1990 Optical Society of America.