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Proceedings Paper

Thermal effects in the Solar Disk Sextant telescope
Author(s): Chiara Spagnesi; Maurizio Vannoni; Giuseppe Molesini; Alberto Righini
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Paper Abstract

The Solar Disk Sextant (SDS) is an instrument conceived to monitor the diameter of the Sun and its oscillations. A key component of the SDS is the Beam Splitting Wedge (BSW), whose function is to provide calibration to the geometry of the focal plane. The thermal behavior of the BSW is critical, as it affects the overall performance of the instrument. Modeling the elements of the BSW and the basic thermal processes is shown to account for experimental evidences of defocusing observed in early measurements with a balloon borne prototype. Basic requirements for accurate thermal stabilization on board of the final instrument are derived.

Paper Details

Date Published: 18 February 2004
PDF: 8 pages
Proc. SPIE 5249, Optical Design and Engineering, (18 February 2004); doi: 10.1117/12.512389
Show Author Affiliations
Chiara Spagnesi, Istituto Nazionale di Ottica Applicata (Italy)
Maurizio Vannoni, Istituto Nazionale di Ottica Applicata (Italy)
Giuseppe Molesini, Istituto Nazionale di Ottica Applicata (Italy)
Alberto Righini, Univ. degli Studi di Firenze (Italy)


Published in SPIE Proceedings Vol. 5249:
Optical Design and Engineering
Laurent Mazuray; Philip J. Rogers; Rolf Wartmann, Editor(s)

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