NEWS 20 December 2022

Next level in laser guide star creation

To meet the ever-increasing demands for large telescopes, a so-called laser guide star can be used for adaptive optics correction.


These artificial reference stars are created by a Laser Projection System (LPS), which has a Beam Conditioning and Diagnostics System (BCDS) as one of its critical subsystems. Building on its works for the Very Large Telescope, TNO recently won the tender for the Extremely Large Telescope’s LPS. Demcon focal was challenged to design the BCDS, as described in this Mikroniek article. It combines easy maintainability with strict optical requirements concerning laser beam quality and pointing stability, taking into account large thermal and mechanical load variations. (Image courtesy of Demcon focal)


References

Picometer drift and microrad reproducibility

At the end of May, Settels Savenije hosted a DSPE Knowledge Day dedicated to challenges in nanometrology.

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Order of frictions and stiffnesses…

For lumped systems consisting of different frictions and stiffnesses, there has been confusion in literature about hysteresis curves and virtual play for many decades.

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Make it clean

In mid-April, the second edition of the Manufacturing Technology Conference and the fifth edition of the Clean Event were held together, for the first time, at the Koningshof in Veldhoven (NL).

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