Sökning: "shack-hartmann"
Hittade 4 uppsatser innehållade ordet shack-hartmann.
1. Focal Spot Optimization Using Spatial Light Modulation and a Phase Retrieval Algorithm
Master-uppsats, Lunds universitet/Atomfysik; Lunds universitet/Fysiska institutionenSammanfattning : 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. LÄS MER
2. Wavefront Sensor with Astigmatism Correction for Measurements on the Human Eye
Kandidat-uppsats, KTH/Skolan för teknikvetenskap (SCI)Sammanfattning : 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. LÄS MER
3. Implementation of adaptive optics into a femtosecond laser chain
Master-uppsats, Lunds universitet/Fysiska institutionenSammanfattning : 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. LÄS MER
4. Evaluation of measurement data for an optical free-space aircraft to ground communication link system
Master-uppsats, Blekinge Tekniska Högskola/Institutionen för tillämpad signalbehandlingSammanfattning : 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. LÄS MER