Deep microstructure topography characterization with optical vortex interferometer

Measuring Deformation and Topography with a Portable Radar Interferometer

Measurements of surface topography and ground-motion over the Rhone glacier in Switzerland and the Tessina landslide in Italy performed with a ground-based real-aperture interferometric radar are discussed. The phase difference between successive images acquired by the terrestrial interferometric radar from the same viewpoint are used to determine displacements on the order of a fraction of a w...

An optical interferometer with wavelength dispersion

MAPPIT is an optical interferometer installed at the coudé focus of the 3.9 m Anglo-Australian Telescope. The instrument combines non-redundant masking with wavelength dispersion and is able to record fringes simultaneously over a wide bandwidth. For typical observations centred near 600 nm, the bandwidth is ∆ = 55 nm and the spectral resolution is = 3 nm. This paper describes the instrument an...

Investigating vortex dynamics in shallow water with topography

Generation of Optical Vortex Arrays Using Single-Element Reversed-Wavefront Folding Interferometer

Optical vortex arrays have been generated using simple, novel, and stable reversed-wavefront folding interferometer. Two new interferometric configurations were used for generating a variety of optical vortex lattices. In the first interferometric configuration one cube beam splitter (CBS) was used in one arm of Mach-Zehnder interferometer for splitting and combining the collimated beam, and on...

An Accuracy Analysis of Small Angle Measurement Using the Optical Vortex Interferometer

In recent years a lot of effort has been put into testing and improving the idea of a three-beam interferometer known as Optical Vortex Interferometer (OVI). Devices based on the idea of an OVI allow, among other things, measuring small rotation angles of the wave [1]. In this paper complex statistical analysis has been used for the results of the small-angle rotation wave measuring method. The...