METROLOGY

During the last years we have worked in different methods of metrology. We have proposed a point diffraction interferometer in which the phase stepping can be implemented by the use of liquid crystals. He has proposed different numerical methods to obtain the profile of a surface from the data obtained with an optical deflectometer or a wave front sensor. Different types of deflectometer geometries have been studied. These methods are being implemented in commercial set-ups. In collaboration with the ALBA synchrotron that is being built in Barcelona we are developing new methods to measure the shape of X-ray mirrors with ultra-precision.

We have proposed different numerical methods to obtain the profile of a surface from the data obtained with an optical deflectometer or a wave front sensor. These methods are being implemented in commercial set-ups by Trioptics GmbH Company in Germany.

In collaboration with the ALBA synchrotron that has been built in Barcelona at the Campus of Universitat Autònoma de Barcelona we are developing new methods to measure the shape of X-ray mirrors with ultra precision. 

                             Point Diffraction Interferometer with Liquid Crystals

Recent articles:

 

We have proposed a point diffraction interferometer in which the phase stepping can be implemented by the use of liquid crystals. With this set-up we are able to register a holographic movie in which we can, for each time, focus at different planes; visualize what happens at a given plane as a function of time; or follow some object in depth and time. We are developing systems for particle tracking with application in the determination of speed field in a fluid.

                              Point Diffraction Interferometer with Liquid Crystals

Recent articles:

 

A new optical architecture, based on a double-sideband filter simultaneously applied at the Fourier plane, is proposed for in-line digital holography. The proposed architecture not only allows to remove additional conjugate images at the final object image but also reduces to certain extent deformations that usually appears when using a single-sideband filter.

                               interferometer

Recent articles:

 

Miniresum

Imatge..

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