Analysis of secondary mirror mold topography to Large Millimeter Telescope using fringe projection technique

Amalia Martínez; J. A. Rayas; Sergio Vázquez; Alberto Jaramillo

doi:10.1117/12.674606

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10 February 2006 Analysis of secondary mirror mold topography to Large Millimeter Telescope using fringe projection technique

Amalia Martínez, J. A. Rayas, Sergio Vázquez, Alberto Jaramillo

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Proceedings Volume 6046, Fifth Symposium Optics in Industry; 60461X (2006) https://doi.org/10.1117/12.674606
Event: Fifth Symposium Optics in Industry, 2005, Santiago De Queretaro, Mexico

Abstract

The Large Millimeter Telescope (LMT)¹ is a 50 m diameter millimeter-wave telescope designed for principal operation at wavelengths between 1mm and 4mm. The LMT secondary mirror will have a diameter of approximately 2.6 meters and focal ratio of .35. The purpose of this study was to implement the incoherent fringe projection technique and the spatial phase synchronous method to measure the secondary mirror mold profiling. The obtained topography is compared with the conic surface generated synthetically. We considered that mold should be hyperboloid surface with paraxial curvature of 1764.9 mm and conic constant of -1.1474. We will discuss the preliminary results where it is obtained a RMS of 0.624 cm.

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Amalia Martínez, J. A. Rayas, Sergio Vázquez, and Alberto Jaramillo "Analysis of secondary mirror mold topography to Large Millimeter Telescope using fringe projection technique", Proc. SPIE 6046, Fifth Symposium Optics in Industry, 60461X (10 February 2006); https://doi.org/10.1117/12.674606

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