OGS Telescope

The Optical Ground Station (OGS) telescope, installed in the Teide Observatory, has been built by Carl Zeiss, is owned by ESA (European Space Agency) and is operated by the IAC (Instituto de Astrofísica de Canarias) and Ataman Science S.L.U.

The telescope is a 1 m Ritchey-Chretien / Coudé telescope supported by an English-built mount inside a dome 12.5 metre in diameter. Its main purposes are:

Since 2006, the telescope has also been used as a receiver station for quantum communication experiments (such as testing Bell inequalities, quantum cryptography, quantum teleportation), with the sender station being 143 km away in the observatory on La Palma. This is possible because this telescope can be tilted to a near-horizontal position to point it at La Palma, which many large astronomical telescopes are unable to do.

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Wikipedia