Final design of the Large Binocular Telescope M1 mirror cells

Luciano Miglietta; Peter M. Gray; Walter W. Gallieni; Ciro Del Vecchio

doi:10.1117/12.269052

21 March 1997 Final design of the Large Binocular Telescope M1 mirror cells

Luciano Miglietta, Peter M. Gray, Walter W. Gallieni, Ciro Del Vecchio

Proceedings Volume 2871, Optical Telescopes of Today and Tomorrow; (1997) https://doi.org/10.1117/12.269052
Event: Optical Telescopes of Today and Tomorrow, 1996, Landskrona/Hven, Sweden

Abstract

The mirror-cells of the LBT (large binocular telescope) 8.4 m honeycomb borosilicate primary mirrors have to meet various requirements in addition to providing support to the mirrors and to the Gregorian instrumentation. The mirror-cells are directly connected to the main telescope structure and have a structural function themselves in order to supply a very high stiffness boundary to the position actuators (hardpoints) of the primary mirrors. The cells also must guarantee an overall strength to make up the bottom part of the vacuum shell, whose top part is the bell-jar for the mirror aluminizing. Each mirror cell has to hold several components inside: 160 pneumatic actuators for the active optics of the mirror, the thermal control system and its 252 air ejectors, and 6 position actuators. A further requirement for the mirror cell design is also to provide access for the maintenance of all the above sub-systems. In this report we summarize the main mirror-cells functions, their final design and briefly describe how we met all the specifications.

Citation Download Citation

Luciano Miglietta, Peter M. Gray, Walter W. Gallieni, and Ciro Del Vecchio "Final design of the Large Binocular Telescope M1 mirror cells", Proc. SPIE 2871, Optical Telescopes of Today and Tomorrow, (21 March 1997); https://doi.org/10.1117/12.269052

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