Review of self-referenced measurement algorithms: Bridging lateral shearing interferometry and multi-probe error separation
Sign Up to like & getrecommendations! Published in 2017 at "Frontiers of Mechanical Engineering"
DOI: 10.1007/s11465-017-0432-3
Abstract: With the development of new materials and ultra-precision processing technology, the sizes of measured objects increase, and the requirements for machining accuracy and surface quality become more exacting. The traditional measurement method based on reference… read more here.
Keywords: error; lateral shearing; error separation; shearing interferometry ... See more keywords
Recognition and tracking of convective flow patterns using Wollaston shearing interferometry
Sign Up to like & getrecommendations! Published in 2017 at "Advances in Space Research"
DOI: 10.1016/j.asr.2017.06.028
Abstract: Abstract The GeoFlow experiment on the ISS is designed to study convective flows in a spherical gap under microgravity conditions. The main challenge, however, is the visualization of the fluid flow especially under the safety… read more here.
Keywords: wollaston shearing; flow; recognition tracking; shearing interferometry ... See more keywords
Experimental investigations of temperature distribution in non-premixed flames with different gas compositions by large lateral shearing interferometry
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Quantitative Spectroscopy and Radiative Transfer"
DOI: 10.1016/j.jqsrt.2018.12.008
Abstract: Abstract The gas temperature fields of axisymmetric co-annular laminar diffusion ethylene flame jets in air and oxygen-enriched atmospheres were measured and visualized using large lateral shearing interferometry. The relationship between the refractive index and the… read more here.
Keywords: gas; gas compositions; lateral shearing; large lateral ... See more keywords
Echelle gratings tiling method based on lateral shearing interferometry
Sign Up to like & getrecommendations! Published in 2022 at "Optics and Laser Technology"
DOI: 10.1016/j.optlastec.2021.107475
Abstract: Abstract A method for echelle gratings tiling based on lateral shearing interferometry is proposed. Fringe patterns of the grating assembly are generated by a wedge plate. Mosaic errors can be calculated and corrected by observing… read more here.
Keywords: lateral shearing; echelle gratings; method; shearing interferometry ... See more keywords
Geometric-phase-based shearing interferometry for broadband vortex state decoding
Sign Up to like & getrecommendations! Published in 2022 at "Scientific Reports"
DOI: 10.1038/s41598-022-07083-w
Abstract: Given that spin and orbital angular momenta of photons have been widely investigated in optical communication and information processing systems, efficient decoding of optical vortex states using a single element is highly anticipated. In this… read more here.
Keywords: shearing interferometry; phase based; geometric phase; vortex ... See more keywords
Experimental single-photon pulse characterization by electro-optic shearing interferometry
Sign Up to like & getrecommendations! Published in 2018 at "Physical Review A"
DOI: 10.1103/physreva.98.023840
Abstract: The ability to characterize the complete quantum state of light is essential for both fundamental and applied science. For single photons the quantum state is provided by the mode that it occupies. The spectral temporal… read more here.
Keywords: experimental single; pulse characterization; interferometry; photon pulse ... See more keywords
Method for improving measurement efficiency of lateral shearing interferometry
Sign Up to like & getrecommendations! Published in 2017 at "Optical Engineering"
DOI: 10.1117/1.oe.56.2.024107
Abstract: Abstract. The computation time of wavefront reconstruction is decreased by sampling the difference fronts in the present study. The wavefront can be reconstructed with high accuracy up to 64 Zernike terms with only 32×32 sampled… read more here.
Keywords: difference; efficiency lateral; measurement efficiency; shearing interferometry ... See more keywords
Relationship between shear ratio and reconstruction accuracy in lateral shearing interferometry
Sign Up to like & getrecommendations! Published in 2020 at "Optical Engineering"
DOI: 10.1117/1.oe.59.3.034113
Abstract: Abstract. The shear ratio is an essential parameter of the lateral shearing interferometry system that affects dynamic range, signal-to-noise ratio, and accuracy. Some qualitative conclusions about the shear ratio’s influence can be found in existing… read more here.
Keywords: reconstruction; shear ratio; accuracy; shearing interferometry ... See more keywords
Quadriwave lateral shearing interferometry based on double birefringent crystals of beam displacer.
Sign Up to like & getrecommendations! Published in 2022 at "Applied optics"
DOI: 10.1364/ao.478344
Abstract: A quadriwave lateral shearing interferometry (QWLSI) is proposed based on double birefringent crystals of a beam displacer (DBCs-BD). The DBCs-BD is formed by adopting two birefringent crystals of a polarization beam displacer (PBD), which can… read more here.
Keywords: shearing interferometry; beam displacer; birefringent crystals; quadriwave lateral ... See more keywords
In situ calibration of shear ratio for quadriwave lateral shearing interferometry using double-slit interference.
Sign Up to like & getrecommendations! Published in 2024 at "Applied optics"
DOI: 10.1364/ao.519203
Abstract: A new method, to the best of our knowledge, based on double-slit (DS) interference is proposed to accurately estimate the shear ratio of the system, with plane wave or spherical wave incidence. Existing shear ratio… read more here.
Keywords: slit interference; shear ratio; lateral shearing; ratio ... See more keywords
Measurement of Wafer Focus by Grating Shearing Interferometry
Sign Up to like & getrecommendations! Published in 2020 at "Applied Sciences"
DOI: 10.3390/app10217467
Abstract: A method applied for improving the measurement precision and efficiency of wafer focusing in an optical lithography instrument (OLI) is introduced. Based on grating shearing interferometry, the defocus and tilt of the wafer are measured… read more here.
Keywords: wafer focus; grating shearing; measurement wafer; shearing interferometry ... See more keywords