Essays about: "Shack-Hartmann Sensor"

Found 3 essays containing the words Shack-Hartmann Sensor.

1. 1. Focal Spot Optimization Using Spatial Light Modulation and a Phase Retrieval Algorithm

   University essay from Lunds universitet/Atomfysik; Lunds universitet/Fysiska institutionen

   Author : Robert Petersen; [2023]
   Keywords : Spatial Light Modulation; Phase Retrieval Algorithm; Focal Spot Optimization; Adaptive Optics; Wavefront Sensing; Lasers; Physics and Astronomy; Technology and Engineering;

   Abstract : 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

3. 2. Wavefront Sensor with Astigmatism Correction for Measurements on the Human Eye

   University essay from KTH/Skolan för teknikvetenskap (SCI)

   Author : Mei-Li Holmberg; Linnea Johansson; [2017]
   Keywords : ;

   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

4. 3. Implementation of adaptive optics into a femtosecond laser chain

   University essay from Lunds universitet/Fysiska institutionen

   Author : Sandhra-Mirella Valdma; [2015]
   Keywords : wavefornt correction; deformable mirror; femtosecond laser; wavefront sensor; shack-hartmann; adaptive optics; Physics and Astronomy;

   Abstract : 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