The Experts below are selected from a list of 270 Experts worldwide ranked by ideXlab platform
Vladimir P Tychinsky - One of the best experts on this subject based on the ideXlab platform.
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Optical phase imaging of living organisms inside the Airy Disk
Clinical Applications of Modern Imaging Technology II, 1994Co-Authors: Vladimir P Tychinsky, Georgy E. Koufal, Alex Odintsov, Tatiana V. VyshenskaiaAbstract:The main goal of this paper is to present a new approach based on computer-aided phase microscope Airyscan for submicron biological structures dynamic investigation. In our experiments micelial cell walls were used as the object with well known submicron structure. Two types of cilia beating specimens and cytoplasm movement inside the onion cell were chosen for dynamic processes registering. This paper peruses mainly methodological goals for demonstration of the new method possibilities.© (1994) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
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Optical 3-D monitoring VLSI structures
Integrated Circuit Metrology Inspection and Process Control VI, 1992Co-Authors: Vladimir P Tychinsky, Alexander V TavrovAbstract:Phase object pattern analysis has shown the possibility of considerably increasing microscope spatial resolution. Experiments have revealed more than ten times resolution enhancement. Some phase object images inside an Airy Disk are presented.© (1992) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
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Properties of the phase images inside the Airy Disk (Proceedings Only)
Laser Interferometry IV: Computer-Aided Interferometry, 1992Co-Authors: Vladimir P Tychinsky, Alexander V TavrovAbstract:Phase object pattern analysis has shown the possibility of increasing considerable microscope spatial resolution. Experiment has revealed resolution enhancement of greater than a factor of ten. Some phase object images inside an Airy Disk are presented.
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wavefront dislocations and phase object registering inside the Airy Disk
Innovative Optics and Phase Conjugate Optics, 1991Co-Authors: Vladimir P Tychinsky, Alexander V TavrovAbstract:The accessibility of the optical information inside the Airy Disk is experimentally proved. A 3- D image of a 0.1 micrometers slit was obtained with an Airyscan microscope at (lambda) equals 0.63 micrometers .
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Wavefront dislocations and registering images inside the Airy Disk
Optics Communications, 1991Co-Authors: Vladimir P TychinskyAbstract:Abstract Recently discovered superresolution of phase objects is explained using the properties of high order gaussian beams and the wavefront dislocations which were first discussed by J.F. Nye and M.V. Berry. We succeeded to state some fundamental relations in the phase patterns created by gaussian beams and prove the possibility of spatial resolution inside the Airy Disk, which is the diffraction-limited image of a point. The dislocations' pattern is stable relative to the spherical wavefront transformations and constitutes a framework, which contains the main 3D-object information.
Takunori Taira - One of the best experts on this subject based on the ideXlab platform.
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High peak power Nd:YAG/Cr:YAG ceramic microchip laser with unstable resonator.
Optics express, 2019Co-Authors: Hwan Hong Lim, Takunori TairaAbstract:A doughnut mode microchip laser was demonstrated by introducing a monolithic ceramic Nd:YAG/Cr4+:YAG chip in an unstable resonator to deliver laser pulses with an energy of 13.2 mJ and a pulse width of 476 ps, corresponding to a record peak power of 27.7 MW. The laser beam quality was characterized by M2∼6 at 10 Hz repetition rate. No significant degradation or change of beam pattern, pulse width, and M2 was confirmed during energy scaling in the case of the unstable cavity, promising for further brightness improving. In comparison with a flat-flat cavity, pulse broadening and M2 increase was observed up to ∼1.2 ns and ∼10, respectively, during energy scaling up to 18 mJ due to the beam pattern degradation. The doughnut beam was observed to have an Airy Disk at the focal point, which was suitable for laser induced breakdown in air. The measured breakdown threshold of doughnut beam was comparable to a near-Gaussian beam (M2=1.3).
Antoine Labeyrie - One of the best experts on this subject based on the ideXlab platform.
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Gravitational lenses as giant diffractive telescopes.
Astronomy and Astrophysics, 1994Co-Authors: Antoine LabeyrieAbstract:Plane electromagnetic waves which propagate past a compact mass, assumed opaque and spherical, become distorted, according to General Relativity, and generate a far-field diffraction pattern resembling the classical Airy Disk. It can be intercepted by a telescope, causing brief diffractive events which may provide information on the lensing mass and the background source producing the wave. A convolved image of the source is indeed projected onto the telescope aperture. Such events can be expected to occur at intervals of weeks in the average, for a planet-sized mass located at less than a parsec from the observer, if there is a nearby galaxy in the background field. The expected photon count is modest but adequate when using large diffraction-limited telescopes
Xuemei Ding - One of the best experts on this subject based on the ideXlab platform.
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Lateral resolution enhancement of confocal microscopy based on structured detection method with spatial light modulator.
Optics express, 2017Co-Authors: Limin Zou, Guo Qingyuan, Xuemei DingAbstract:Lateral resolution in confocal microscope is limited by the size of pinhole. In this paper, we attempt to introduce a new method to achieve structured detection through using spatial light modulator (SLM) to improve it. SLM modulates the Airy Disk amplitude distribution according to the detection function in collection arm. Instead of using CCD to capture spot images and modulate them with numerical analysis in virtual structured detection (VSD), this method uses SLM to accomplish these aims with higher imaging rates. Based on simulation and the experiment results, it can be found that coherent transfer function expands and the resolution is 1.6 times as large as that of conventional confocal microscope.
Alexander V Tavrov - One of the best experts on this subject based on the ideXlab platform.
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Optical 3-D monitoring VLSI structures
Integrated Circuit Metrology Inspection and Process Control VI, 1992Co-Authors: Vladimir P Tychinsky, Alexander V TavrovAbstract:Phase object pattern analysis has shown the possibility of considerably increasing microscope spatial resolution. Experiments have revealed more than ten times resolution enhancement. Some phase object images inside an Airy Disk are presented.© (1992) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
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Properties of the phase images inside the Airy Disk (Proceedings Only)
Laser Interferometry IV: Computer-Aided Interferometry, 1992Co-Authors: Vladimir P Tychinsky, Alexander V TavrovAbstract:Phase object pattern analysis has shown the possibility of increasing considerable microscope spatial resolution. Experiment has revealed resolution enhancement of greater than a factor of ten. Some phase object images inside an Airy Disk are presented.
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wavefront dislocations and phase object registering inside the Airy Disk
Innovative Optics and Phase Conjugate Optics, 1991Co-Authors: Vladimir P Tychinsky, Alexander V TavrovAbstract:The accessibility of the optical information inside the Airy Disk is experimentally proved. A 3- D image of a 0.1 micrometers slit was obtained with an Airyscan microscope at (lambda) equals 0.63 micrometers .
