Share Email Print

Proceedings Paper

Alignment of two paraboloid off-axis sections by measuring the sagitta
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

The primary reflective surface of the Large Millimeter Telescope (LMT), it will be formed by a set of trapezoidal panels. Each panel has a paraboloid off-axis form and it is constructed with carbon fiber. The paraboloid off-axis surfaces is obtained copying by contact to a mold with the required form. One proposal in order to manufacture each mold, is made it of graphitizing steel fused. And after that, it lathing with a numerical control machine for obtain the paraboid off-axis section. But due to the dimensions of the sections, 5x3 meters for the biggest section; the mold of steel will be formed by two small segments. In consequence, it is necessary in the first place, alignment these segments in order to obtain a mold with a surface approximately continuous, with a minimum precision of 5mm. In this work we present a method in order to alignment these two molds' segments, as well as, the results of alignment obtained for the prototype mold.

Paper Details

Date Published: 26 February 2004
PDF: 9 pages
Proc. SPIE 5252, Optical Fabrication, Testing, and Metrology, (26 February 2004); doi: 10.1117/12.513194
Show Author Affiliations
Fermin S. Granados-Agustin, Instituto Nacional de Astrofisica Optica y Electronica (Mexico)
Maria Elizabeth Percino-Zacarias, Instituto Nacional de Astrofisica Optica y Electronica (Mexico)
Sergio Vazquez y Montiel, Instituto Nacional de Astrofisica Optica y Electronica (Mexico)
Alejandro Cornejo-Rodriguez, Instituto Nacional de Astrofisica Optica y Electronica (Mexico)

Published in SPIE Proceedings Vol. 5252:
Optical Fabrication, Testing, and Metrology
Roland Geyl; David Rimmer; Lingli Wang, Editor(s)

© SPIE. Terms of Use
Back to Top