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Showing 1 to 20 of 92 for “"adaptive optics"”.
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The Adaptive Optics Lucky Imager: combining adaptive optics and lucky imaging
… were obtained by combining the techniques of adaptive optics and lucky imaging. The Adaptive Optics Lucky Imager (AOLI), being developed at Cambridge as part of a European collaboration, combines these two techniques in a dedicated instrument for the first time. The instrument is designed …
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Adaptive Optics for Stellar Interferometry
… from seeing will need the consideration of adaptive optics (AO). Accordingly, this dissertation will first examine the problem that seeing causes in stellar interferometers. The application of Adaptive Optics in Stellar Interferometry will then consider these results to achieve the final …
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Sensorless adaptive optics in advanced microscopy techniques
Adaptive optics is a technique that is able to restore diffraction limited performance in optical systems that are adversely affected by optical aberrations. In this doctoral thesis adaptive optics technology has been implemented in systems for imaging and micromanipulation whose performance …
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Technologies for Astronomical Wide-Field Adaptive Optics
Adaptive Optics (AO) can greatly enhance the resolution of astronomical images, achieving close to diffraction-limited performance in the near infrared; however there are a number of areas where significant improvements can be made, one of them being the very limited field of view that current AO …
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Adaptive optics for high energy laser systems
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1994.
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Techniques and devices for high-resolution adaptive optics
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1981.
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Adaptive optics for large aperture coherent laser radars
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1989.
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Prototyping Blue Phase Wavefront Correctors for Astronomical Adaptive Optics
Adaptive optics is a technique developed in the field of astronomy for the correction of aberrations introduced by the atmosphere when observing stars, planets and deep sky objects using telescopes based on Earth. This correction is usually applied with deformable mirrors, which have the benefit of …
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Multi-Conjugate Adaptive Optics for LINC-NIRVANA : Laboratory Tests of a Ground-Layer Adaptive Optics System and Virtical Turbulence Measurements at Mt. Graham
… ground-based telescopes. With the technique of Adaptive Optics, the induced distortions of the light can be measured and corrected in real-time, regaining nearly diffraction-limited performance. Unfortunately, when using a single guide star to measure the distortions, the correction is only …
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On The Use Of Gaussian Filter Functions For Adaptive Optics
For adaptive optic systems, the use of aperture filter functions calculated using various Zernike modes can be useful in removing lower-order aberrations caused by atmospheric turbulence. Traditionally, these filter functions are calculated using the step function depicting a hard aperture that …
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Adaptive optics stimulated emission depletion microscope for thick sample imaging
… nanoscopic resolution. In order to achieve that, adaptive optics (AO) has been employed for correcting the aberrations, using the indirect wavefront sensing approach. This thesis presents a custom built 3D STED microscope with the AO correction and the resulting images of thick samples with …
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Bidirectional adaptive optics architectures for optical communication through atmospheric turbulence
… the loss-sensitive QKD communication protocols. Adaptive optics holds the best promise for mitigating, if not completely compensating for, these turbulence-induced degradations. Nevertheless, despite adaptive optics being a richly developed field, theoretical studies of adaptive optics systems …
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A CCD based curvature wavefront sensor for Adaptive Optics in Astronomy
Adaptive Optik (AO) ist eine Technik, um Störungen in der Abbildung von Objekten im Teleskop auszugleichen. Diese Störungen werden von Fluktuationen des Brechungsindexes in der Erdatmosphäre hervorgerufen. Zum Messen dieser Störungen gibt es eine Reihe verschiedener Wellenfrontsensoren. Einer davon …
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A Comprehensive Framework for Adaptive Optics Scanning Light Ophthalmoscope Image Analysis
… structures in the eye. The development of adaptive optics ophthalmic imaging systems has made high resolution visualization of ocular microstructures possible. These systems include the confocal and split detector adaptive optics scanning light ophthalmoscope (AOSLO), which can visualize …
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Long exposure point spread function estimation from solar adaptive optics loop data
Adaptive optics (AG) systems provide partial correction to wavefront distortions introduced by the Earth's atmosphere. They have become an essential tool to obtain diffraction-limited observations from ground-based telescopes. However, the AG correction is only partial and post-processing with a …
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Dynamic reconstruction and multivariable control for force-actuated, thin facetsheet adaptive optics
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1997.
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Fine surface control of flexible space mirrors using adaptive optics and robust control
… flexibilities and low natural frequencies. Using adaptive optics for space telescopes presents a possible solution. This research proposes innovative H[infinity] robust control techniques for these types of systems. An H[infinity] controller is synthesized for a complex analytical model with 997 …
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Application of adaptive optics to the spectroscopic investigation of small-scale solar structures
… using a two-dimensional spectrometer and an Adaptive Optics system, which allows us to record high-resolution dopplergrams and residual intensity images. We find evidence that bright points are smaller than 120 km in diameter. Bright points are situated exclusively in regions of enhanced …
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