Talbot- versus Shack-Hartmann Sensor: global aberration measurement in the presence of mid-frequency waviness
- Institute of Optics, Information and Photonics, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU)
schwider [at] optik [dot] uni-erlangen [dot] de
Wave front sensors are applied in the measurement of the wave aberrations of the human eye. Such measurements have to guarantee a very high degree of safety being the basis for ablative corrections with the excimer laser. PMMA-platelets with an ablated surface profile are a possible material for a calibration retarder. Due to the point-like ablation process the resulting retarder shows a certain amount of mid-frequency waviness aggravating the measurement of global aberrations. It will be shown how this type of waviness hampers the performance of the Talbot and the Shack-Hartmann sensor. Fizeau-interferograms are used as a back-up.
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@inproceedings{schwider2005a21,
author = {Schwider, Johannes},
title = {{Talbot- versus Shack-Hartmann Sensor: global aberration measurement in the presence of mid-frequency waviness}},
booktitle = {DGaO-Proceedings 2005},
series = {DGaO-Proceedings},
eventtitle = {106. Jahrestagung der DGaO},
eventdate = {2005-05-17/2005-05-20},
venue = {Wrocław},
publisher = {Deutsche Gesellschaft für angewandte Optik e.V.},
year = {2005},
pages = {A21},
langid = {english},
url = {https://dgao-proceedings.de/paper/106-a21}
}
106. Annual Conference of the DGaO · Wrocław · 2005