You have requested a machine translation of selected content from our databases. This functionality is provided solely for your convenience and is in no way intended to replace human translation. Neither SPIE nor the owners and publishers of the content make, and they explicitly disclaim, any express or implied representations or warranties of any kind, including, without limitation, representations and warranties as to the functionality of the translation feature or the accuracy or completeness of the translations.
Translations are not retained in our system. Your use of this feature and the translations is subject to all use restrictions contained in the Terms and Conditions of Use of the SPIE website.
17 September 2012The 3,6 m Indo-Belgian Devasthal Optical Telescope: the hydrostatic azimuth bearing
AMOS SA has been awarded of the contract for the design, manufacturing, assembly, tests and on site installation
(Devasthal, Nainital in central Himalayan region) of the 3.6 m Indo-Belgian Devasthal Optical Telescope (IDOT).
The telescope has a Ritchey-Chrétien optical configuration with a Cassegrain focus equipped with one axial port and
two side ports. The primary mirror is a meniscus active mirror. The mount is an Alt-Az type with for the azimuth axis a
5 m diameter hydrostatic track. This paper presents the solution adopted by AMOS to meet the specific requirements for
the azimuth axis. The track is designed to be able to control the positioning of the telescope around the azimuth axis
with an accuracy of 0.05 arc second for all tracking configurations. The challenge came from this tight accuracy with a
mass in rotation weighting 125 tons. The azimuth track was mounted and tested in AMOS workshop; the tests and
performances are also discussed.
The alert did not successfully save. Please try again later.
Jonathan de Ville, Maxime Piérard, Christian Bastin, "The 3,6 m Indo-Belgian Devasthal Optical Telescope: the hydrostatic azimuth bearing," Proc. SPIE 8444, Ground-based and Airborne Telescopes IV, 84443Z (17 September 2012); https://doi.org/10.1117/12.925943