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18 February 2004 Thermal effects in the Solar Disk Sextant telescope
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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.
© (2004) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Chiara Spagnesi, Maurizio Vannoni, Giuseppe Molesini, and Alberto Righini "Thermal effects in the Solar Disk Sextant telescope", Proc. SPIE 5249, Optical Design and Engineering, (18 February 2004);


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