New Technique of Segments Alignment in a Large Dimensions Mirror
Proceedings of SPIE(2018)
Abstract
The tendency in the manufacture of large telescopes that working in visible light, has improve the manufacture of large mirrors by the use off-axissegments, which must be aligned with very high precision in order of fractions of wavelength for the optimal operation. In this paper we present a new method for alignmentsegments of a big telescope, where the positions of the images produced by each off-axis segment, of a point source placed at center of curvature, the primary mirror. These positions can be known by exact rays tracing, considering the aberrations produce in each off-axis segment. Consequently, each point source is not on the optical axis of the system. Some numerical simulations are shown to establish the accuracy achieved with the proposed method.
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Key words
Large telescope,alignment off axis segment,exact rays tracing,center of curvature,numerical simulations,primary mirror
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