The BIFROST instrument will be the first VLTI instrument optimised for high spectral resolution up to R=25,000 and operate between 1.05 and 1.7 μm. A key component of the instrument will be the spectrograph, where we require a high throughput over a broad bandwidth. In this contribution, we discuss the four planned spectral modes (R=50, R=1000, R

This contribution presents the structural analysis that followed the preliminary design specifications of the European Solar Telescope (EST). EST is a 4-metre class telescope based on an aplanatic Gregorian configuration with an alt-azimuthal mount. The optical design has undergone several changes since the end of the conceptual phase. A finite

This contribution describes the software and electronic improvements implemented in the GREGOR Infrared Spectrograph (GRIS) installed on the Gregor telescope. It is located at the Teide Observatory, in Tenerife, Islas Canarias, Spain. As a demonstrator for an instrument for the European Solar Telescope (EST), this project aims to perform

In 2014 TNG also offered GIANO-B to the scientific community, providing a near-infrared (NIR) cross-dispersed echelle spectrograph covering 0.97 − 2.45 µm at a resolution of 50000. The possibility of simultaneously using GIANO-B together with the HARPS-N spectrograph (GIARPS observing mode) has been particularly appealing especially for the search

The European Solar Telescope (EST) is a next generation large-aperture solar telescope, to be located in the Canary Islands. It will be optimized for studies of the magnetic coupling of the solar atmosphere. This will require diagnostics of the thermal, dynamic and magnetic properties of the plasma over many scale heights, by using multi-wavelength

The Adaptive and Lucky Imagine Optics Lightweight Instrument (ALIOLI) is a portable Adaptive Optics (AO) system capable of being installed on different medium-sized telescopes due to a modular approach to its components. The Wavefront Sensor (WFS) module is designed to be used with three different WFSs: Shack-Hartmann (SH), Two Pupil Plane Position