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Under a project led by TNO-TPD, a prototype of a long-stroke, nano-resolution, optical delay line has
been presented at the SPIE "Astronomical Telescopes and Instrumentation Exhibition" in Glasgow.
TNO-TPD - as system integrator - has selected Micromega Dynamics to build a state-of-the-art magnetic bearing
guiding mechanism to put the full cat's eye optical system into levitation.
Within this project, Micromega Dynamics was responsible for:
- Modeling the suspension system and its interaction with the payload
- Designing the overall suspension scheme
- Designing and manufacturing the magnetic bearing
- Designing the control laws
- Designing and manufacturing bearing electronics
The magnetic guiding system constrains 5 degrees-of-freedom (dof) without any physical contact with the payload;
the remaining dof being the translation in the OPD direction. Hence a robust and frictionless displacement over
a 70 mm stroke with a resolution of one nanometer can be achieved.
Benefits
- No friction, no wear
- High rejection of perturbations
- Compactness, Robustness
- Easy access to payload
Typical Applications
- Earth and Space Interferometers
- Nanometer resolution Optical Delay Lines
- Guiding and actuation of optical payloads
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