Category : Motion control, positioning stages > Nanopositioning (components and systems)

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The DTT 35 XS is a new piezo mechanism coming from CEDRAT TECHNOLOGIES lab in February 2002. It comes from a development for space needs defined with the CNES (the French space agency), and for which a first application was found in the frame of “PHARAO”. This mechanism is based on two pairs of APA35XS, Amplified Piezo Actuators displaying 35 µm of stroke each, arranged in cross configuration (see figures 1 & 2). The mechanism allows both a deflection of +/- 2 mrad around the X and Y axis and a vertical displacement of 35 µm in the Z direction (see figure 3, data set of the standard version). In order to achieve the two x and y deflections, each pair of APA35XS is electrically driven in push pull configuration, so the device only requires two output channels from the standard driving electronics LA75A-2 of CEDRAT TECHNOLOGIES. In the context of the PHARAO space mission (first space cold atomic clock on board of the ISS), a set of 10 mechanisms will be integrated by EADS-SODERN for the stability control of the “optical molasses” near to the outlet of the Cesium atomic fountain. The DTT35XS will perform this control by changing the angle of incidence of a laser beam in front of an optical fibre. This new 3 dof piezo mechanism thanks to a high bandwidth (higher than 1 kHz) can also fulfil technical specifications for precise and fast optical applications such like optical switches, laser cavity tuning and spectrometry.

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List of all articles in this sub-category Nanopositioning (components and systems)

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