Micro-deflectometry in transmission
- Institut für Optik, Information und Photonik, Friedrich-Alexander-Universität Erlangen-Nürnberg
speterhaensel [at] optik [dot] uni-erlangen [dot] de
We present a novel microscopic method that intrinsically measures local phase gradients of transparent objects. The method is based on "phase measuring deflectometry" [1] in transmission. Images similar to those achieved with differential interference contrast or with phase contrast are generated. However, the novel method displays some additional new features: the images display quantitative data about the lateral variation of the optical path length; the sensitivity reaches the physical limit: very small variations of the refractive index can be measured . Moreover, the method is simple (no interference !). Micro-deflectometry in transmission has the potential to compete with established methods to acquire phase object information.
@inproceedings{peterhaensel2009p24,
author = {Peterhänsel, Sandy and Richter, Claus and Faber, Christian and Knauer, Markus and Häusler, Gerd},
title = {{Micro-deflectometry in transmission}},
booktitle = {DGaO-Proceedings 2009},
series = {DGaO-Proceedings},
eventtitle = {110. Jahrestagung der DGaO},
eventdate = {2009-06-02/2009-06-05},
venue = {Brescia},
publisher = {Deutsche Gesellschaft für angewandte Optik e.V.},
year = {2009},
pages = {P24},
url = {https://dgao-proceedings.de/paper/110-p24}
}