Optical Metrology

Imaging measurement of stress birefringence in optical materials and components

12.03.2009 - Photonik international 1/2009 |  [ deutsche Version lesen ]

Inherent stresses in optical components influence the polarisation of light by stress birefringence, an effect that is undesirable in demanding applications such as microlithography, laser optics and astronomy. Frequently, the requirements on the precise measurement of even low stress birefringence values are correspondingly high. Imaging polarimeters, which here also deliver a statement about the spatial distribution and orientation of the stress birefringence, make this possible.

Photonik I1/2009
Authors: Henning Katte, ilis gmbh, Erlangen, Germany

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