The Deformable Mirrors are, with the wavefront sensors, the core of the adaptive optics system of MORFEO (formerly known as MAORY), the first light AO system for ELT. Such large deformable mirrors (about convex 930 and concave 1220 mm) and the large number of modes (about 900 and 1000 modes) will allow a fitting error below 40 nm RMS on the atmospheric turbulence layers which they are conjugated to with a worst seeing case of 1.5 arcsec. In this paper we will briefly present the status of the design and the performances reached.
The ELT M4 is the telescope-facility adaptive unit for the European ELT. Final design and construction were awarded in 2015 to AdOptica, a consortium of Microgate and ADS International; on-site delivery is planned for 2024. The unit is based on a monolithic, structural reference body manufactured by Mersen Boostec. The flat thin mirror, controlled using the contactless voice-coil-motor based technology, is split in 6 segments produced by Safran Reosc. The M4 unit is ready for integration: we report here the results of the construction and component level testing, introducing also the forthcoming integration and system-level tests.
We present the final design of the Giant Magellan Telescope (GMT) Adaptive Secondary Mirrors System (ASMS), which comprises seven 1m class deformable mirrors segments plus seven hexapod positioners. Each deformable mirror is based on the well established contactless technology developed by AdOptica and already successfully deployed in several 8m class telescopes. The challenge for GMT is that the seven deformable mirrors will function as a single mirror. A subscale prototype made of 72 actuators has been produced to secure system final design: test setup and preliminary results are presented.
The construction of the Multi Object Optical and Near-infrared Spectrograph (MOONS) instrument, the next generation multi object spectrograph for the VLT, is ongoing. This remarkable instrument will combine for the first time the 8 m collecting power of the VLT, 1001 optical fibers with individual robotic positioners and both medium and high resolution spectral coverage across the wavelength range 0.65μm to 1.8 μm. The cryogenic optical bench, with its dimension of 2x3.2 meters, is extremely huge and accommodates the three optical branches (H, RI, YJ bands) with two spectral resolutions: this has been made possible thanks to four sliding systems capable to move over 250 Kg of optics and mechanics at 90K. In this paper we describe the status of these opto-mechanical systems, placing emphasis to the performances and the solutions adopted to realize the sliding systems.
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