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Accueil > Recherche > Groupe R&D Optique & Instrumentation > Programmes d’excellence > Past programs > ANR OASIX


OASIX is a french acronym standing for "Optique Active Spatiale et Instrumentation compleXe". This ANR funded project aims at prototyping a wide field off axis reflective zoom systems based on the use of active mirrors as developed at LAM. Minimising the actuators counting is one of the priority.

Contact :
Emmanuel HUGOT : +33 (0) 612 914 687

Team description
Optical design : Xin Wang, Céline Engel
Finite Element Analysis : Xin Wang, Anais Bernard, Sabri Lemared
Mechanical design : Sabri Lemared, Pascal Vola
Actuation and control electronics : Fabrice Madec, Sabri Lemared
Command/control strategy : Jean-François Sauvage, Céline Engel

Preparing the next generation of ground based and space telescopes requires technological breakthrough enabling the emergence of smart imaging systems, combining very high performances with a minimal size and mass. In this frame, Active Optics and innovative instrumentation soon become mandatory.

Several theme or applications will be addressed by the next generation of telescopes either for observing the universe or the solar system. We can cite the detection of extra solar planets and their characterisation, the detection of earth-like exo-worlds, the characterisation of small bodies in the solar system, the study of galaxies morphology. These scientific goals all require high performance imaging systems.

While telescopes will increase in diameter, the mass and cost cannot be scaled by the same factor. To tackle this problem, innovative instrument architecture is required in order to reduce the size, mass and cost of instrumentation while improving the performances of imaging systems. In particular, innovative optical trains and focal plane architectures must be proposed. The simplification and the miniaturisation of the detection chain will be a key point.

To tackle the above issues, global system studies must be performed to identify which building blocks need to be improved, and which improvement will impact on the global systems by an optimisation of output parameters like the resolution, stability, image quality, field of view, acquisition rate, regarding the size, mass and cost.

Innovation will also require prototypes at the sub-system level. We already identify several directions in close collaboration with CNES, Thales Alenia Space, CEA and ONERA. The prototyping of active correcting systems, able to correct randomly the telescope deformations to keep the better image quality, the prototyping of smart active mirrors dedicated to specific applications such as multiplexing, field selection, or zoom systems, the prototyping of miniaturised cameras using for instance curved micro bolometer arrays or smart focal planes to reduce the size of the systems.

Among the above activities, the OASIX project will be focused the development of an Off Axis wide field Zoom system (OAZ) using Variable Off Axis paraboLAs (VOALA),

The OASIX project will be the first demonstration of the potential of such active instrumentation and its impact at the system level. The implementation of active mirrors in future large space telescopes will be a major technological breakthrough.

© LAM - Laboratoire d’Astrophysique de Marseille

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