Essays about: "shack-hartmann"
Found 4 essays containing the word shack-hartmann.
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1. Focal Spot Optimization Using Spatial Light Modulation and a Phase Retrieval Algorithm
University essay from Lunds universitet/Atomfysik; Lunds universitet/Fysiska institutionenAbstract : Aberrations to the wavefront of a laser beam reduce the quality of the focal spot and are generally undesired. This project is aimed at determining the aberrations of laser beams by using a phase retrieval algorithm and to show that it is possible to correct the aberrations with a spatial light modulator to optimize the focal spot. READ MORE
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2. Wavefront Sensor with Astigmatism Correction for Measurements on the Human Eye
University essay from KTH/Skolan för teknikvetenskap (SCI)Abstract : When conducting experiments on the human eye it is sometimes required to correct some form of astigmatism. A fexible and cost effective way to achieve this is using two identical cross-cylinder lenses, as described in the article ‘Adaptive Astigmatism-Correcting Device for Eyepieces' by Arines and Acosta. READ MORE
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3. Implementation of adaptive optics into a femtosecond laser chain
University essay from Lunds universitet/Fysiska institutionenAbstract : Optical aberrations are the main cause for reduced focusability and low peak intensity in laser beams. All the applications that rely on high peak power and/or small focus spot size, loose efficiency when optical aberrations are present. READ MORE
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4. Evaluation of measurement data for an optical free-space aircraft to ground communication link system
University essay from Blekinge Tekniska Högskola/Institutionen för tillämpad signalbehandlingAbstract : Optical free-space communication is an e ffective approach that can provide tap-proof, high bandwidth data communications. In this thesis there is an Optical link established between aircraft and the ground station. READ MORE