The New Robotic Telescope (NRT) will be the largest fully robotic telescope in the world (4-m class). The primary mirror (M1) will be comprised of 18 independent 960 mm hexagonal segments with an actively controlled position to maintain the shape of the optical surface. The secondary mirror (M2) will be a lightweighted circular mirror of 1270 mm of

The New Robotic Telescope is designed to conduct rapid target follow-up within 30 seconds of an `alert' from survey facilities. To achieve this will require a quick settling time requirement for the mount structure and the mirrors. This means the structure shall be designed to be sufficiently rigid to achieve the mirror position within the `settle

"A joint project has been proposed by the Chinese and Spanish astronomy communities, to develop a high-resolution, ultra- stable spectrograph for the Gran Telescopio Canarias (GTC) at La Palma. Being expected to conduct precise radial velocity (PRV) measurement with extreme precision of up to 10 cm s -1, the instrument would promote the very high

Additive manufacturing (AM) offers many advantages, including material savings, lightening, design freedom, function integration, etc. In the case of cellular materials, regular structures (lattice and honeycomb) are particularly important due to their ability to reduce weight. However, the design process and FEM analysis of this type of structure

HIRES is the high-resolution spectrograph of the European Extremely Large Telescope at optical and near-infrared wavelengths. It consists of three fibre-fed spectrographs providing a wavelength coverage of 0.4-1.8 µm (goal 0.35-2.4 µm) at a spectral resolution of 100,000. The fibre-feeding allows HIRES to have several, interchangeable observing

ESPRESSO is a high resolution, super stable fiber-fed echelle spectrograph, installed at the ESO-VLT Combined Coudé Laboratory of the Paranal Observatory. The main instrument subsystems are: Coudé Path, Fiber Link (FL) and Spectrograph. After installation and verification, the FL subsystem flux efficiency did not fully meet the requirements. We