TELESCOPE

Auxiliary Telescope Systems

rnAMOS is responsible for the design, procurement, manufacturing,rnassembly, factory testing and packing of the four mobile AuxiliaryrnTelescope Systems for the ESO VLT Project, located on the ParanalrnMountain in Chile.

The system is composed of:

• Complete telescope (fork, tube, …) with all the optics (M1 to M11);
• Transporter and service moduls;
• Enclosure;
• Electronics;
• Site equipment (stations and rails).

Telescope:

• Moving Telescope of the 2m class including 11 mirrors:

• Global image quality: 90 nm RMS wavefront error without focus.

• M1:

•  Diameter: 1.87m
•  Aperture: f/1.5
•  ~ 60% lighweighted
•  ~ 40nm RMS WFE for every altitude angle between 30° and zenith

• Optical path length variation under operational loads better than 30nm RMS in the visible range.

• Pointing accuracy better than 1 arcsec RMS on the sky for the whole azimuth (360°) and altitude (60°) ranges.

• Direct drive axes

• Ablernto be relocated in thirty stations on the Paranal site with arnrepeatability of ± 0.1mm and ± 10 arcsec thanks to a fully autonomousrn"transporter".

• Thermally-conditioned during day for minimizing mirror and dome seeing effects.

[2005-05-27]