The vectorial shearing interferometer is based on the Mach–Zehnder configuration; it incorporates a displacement shearing system composed of a pair of wedge prisms that modify the optical path difference and the tilt of the sheared wave front with respect to that of the reference wave front. Variable shear and tilt can be implemented along any direction by choice of displacements Δ<i>x</i> and Δ<i>y</i>. The number of fringes and their orientation can be controlled with the vectorial shear. Knowledge of the prescribed displacements in the <i>x</i> and the <i>y</i> directions permits one to obtain a phase gradient in any direction.
© 2000 Optical Society of America
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(120.4820) Instrumentation, measurement, and metrology : Optical systems
(220.1000) Optical design and fabrication : Aberration compensation
(220.4830) Optical design and fabrication : Systems design
(220.4840) Optical design and fabrication : Testing
Gonzalo Paez, Marija Strojnik, and Guillermo Garcia Torales, "Vectorial Shearing Interferometer," Appl. Opt. 39, 5172-5178 (2000)