Concept validation of a high dynamic range point-diffraction interferometer for wavefront sensing in adaptive optics.
Sign Up to like & getrecommendations! Published in 2022 at "Applied optics"
DOI: 10.1364/ao.439569
Abstract: The direct detection and imaging of exoplanets requires the use of high-contrast adaptive optics (AO). In these systems quasi-static aberrations need to be highly corrected and calibrated. To achieve this, the pupil-modulated point-diffraction interferometer (m-PDI)… read more here.
Keywords: dynamic range; concept validation; point diffraction; adaptive optics ... See more keywords
Dynamic wavefront measurement with a point diffraction interferometer based on birefringence polarization beam splitting.
Sign Up to like & getrecommendations! Published in 2021 at "Applied optics"
DOI: 10.1364/ao.441563
Abstract: In this study, we proposed a point diffraction interferometer based on birefringence polarization beam splitting (BPBS-PDI) for transmission wavefront measurements. Using the polarization beam splitting property of birefringent crystals and a specially designed calcite crystal… read more here.
Keywords: polarization; point diffraction; beam splitting; polarization beam ... See more keywords
Point diffraction interferometer based on a silicon nitride waveguide spherical wave source.
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DOI: 10.1364/ao.461806
Abstract: A point diffraction interferometer based on silicon nitride waveguide (WG-PDI), adopting a silicon nitride waveguide spherical wave source (WG-SWS) with Si substrate and SiO2 cladding, is proposed for spherical surface testing. The WG-SWS is used… read more here.
Keywords: silicon nitride; point diffraction; spherical wave; diffraction interferometer ... See more keywords
Helicity conservation in V-point diffraction.
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DOI: 10.1364/ol.44.003913
Abstract: In singular beams, topological charge is conserved during diffraction. Like scalar field diffraction, in vector field diffraction also, there are conserved quantities. A diffracting V-point disintegrates into a number of C-points of the same polarity… read more here.
Keywords: helicity conservation; point; point diffraction; diffraction ... See more keywords