Results 231 to 240 of about 562,479 (274)
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Adaptive optics for wavefront shaping and analysis
International Journal of Intelligent Systems Technologies and Applications, 2008This brief address sees adaptive optics as a technology for wavefront and beam shaping in nearly real time by phase adaptation and compensation. It suggests that adaptive optics has great potential in the fields of beam shaping and wave front analysis. Advantages and applications are indicated.
H J Tiziani
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Wavefront Shaping Concepts for Application in Optical Coherence Tomography—A Review [PDF]
Sensors, 2020 Bernhard Roth, Jonas Kanngiesser
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Metalasers with arbitrarily shaped wavefront
NatureIntegrated nanolasers have been explored for decades owing to their important role in many applications, ranging from optical information processing and communications to medical treatments1-6. Although polarization, orbital angular momentum and directivity of nanolasers have been successfully manipulated7-9, neither their laser wavefront nor radiation
Yixuan Zeng +10 more
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Active wavefront shaping and analysis
SPIE Proceedings, 2005Active and adaptive optics are becoming more important in the field of beam shaping and wave front analysis. One of the main reasons for the progress and recent activities in active optics is the availability of new active elements like deformable mirrors, micro mirrors and liquid crystals.
Hans J. Tiziani +4 more
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Guidestar-free wavefront shaping
Frontiers in Optics / Laser Science, 2020We present a new concept, image-guided wavefront-shaping, for non-invasive, widefield, incoherent imaging through highly scattering layers, without illumination control. We use image quality assessment as a feedback for wavefront correction.
Tomer Yeminy, Ori Katz
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Resonant wavefront-shaping metasurfaces
High Contrast Metastructures X, 2021Diffractive photonic devices manipulate light via local and nonlocal optical modes. Local devices, such as metasurfaces, can shape a wavefront at multiple selected wavelengths, but inevitably modify light across the spectrum; nonlocal devices, such as grating filters, offer great frequency selectivity but limited spatial control.
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Fast, precise, and shape-flexible registration of wavefronts
Applied Optics, 2021A fast and precise algorithm for wavefront reconstruction by the registration of wavefront segments is presented. If the wavefront exceeds the sensor aperture or the dynamic range of the sensor, a Shack–Hartmann sensor can measure only segments of an optical wavefront. The algorithm registers the wavefront segments in parallel,
Nikolaus Berlakovich +3 more
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Fiber-Metasurface for Wavefront Shaping
Conference on Lasers and Electro-Optics, 2017An array of embedded subwavelength fibers is proposed as a flexible, large-scale and mass-producible metasurface for wavefront shaping. As a proof of concept, we numerically demonstrate beam deflector, focusing optics, high reflector and sinusoidal wavefront shaping.
Zeba Naqvi +3 more
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The relativistic shape of spherical wavefronts
European Journal of Physics, 1998We consider the shape of a spherically expanding wavefront as found by an inertially moving observer, with particular reference to the difference between the classical (Galilean) and relativistic cases.
R J Low, A R Batchelor
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Learning Optimal Wavefront Shaping for Multi-Channel Imaging
IEEE Transactions on Pattern Analysis and Machine Intelligence, 2021Fast acquisition of depth information is crucial for accurate 3D tracking of moving objects. Snapshot depth sensing can be achieved by wavefront coding, in which the point-spread function (PSF) is engineered to vary distinctively with scene depth by altering the detection optics.
Elias Nehme +6 more
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