VLT Adapter - Rotators
VLT Adapter – Rotators
AMOS got the order from the European Southern Observatory (ESO) for the up dating of the ESO drawings, for the realisation and the tests of the 12 Adapter-Rotators (8 Nasmyth and 4 Cassegrain Adapter-Rotators) for the Very Large Telescope project.
The ESO Very Large Telescope consists of an array of four 8 meter Unit Telescopes, each of which has two Nasmyth foci and a Cassegrain focus. Each focus is equipped with an Adapter-Rotator which provides functions necessary for the fine position control of the telescope and for optimising the optical quality of the telescope. The Adapter-Rotator also forms the mechanical interface between the telescope and the scientific instruments. They are basically annular in shape to allow the light from the telescope beam to pass through the centre to the instrument.
The position control functions are contained within a mechanical assembly called Adapter and the instrument interface assembly is called the instrument Rotator.
Together they form an integral unit which is referred to as the Adapter-Rotator. The Nasmyth and the Cassegrain Adapter-Rotators are not identical in size but have a similar function.
- Nasmyth: 2 400 mm diameter; 3 500 kg
- Cassegrain: 1 700 mm diameter; 1 500 kg
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