25 July 2008 Prototyping of differential optics for the SPHERE IRDIS dual imaging planet finder camera
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The SPHERE (Spectro-Polarimetric High-contrast Exoplanet Research) planet finder instrument for ESO's VLT telescope, scheduled for first light in 2011, aims to detect giant extra-solar planets in the vicinity of bright stars by the aid of an extreme-AO turbulence compensation system and to characterize the objects found through spectroscopic and polarimetric observations. Dual imaging observations within the Y, J, H and Ks atmospheric windows (~0.95 - 2.32μm) will be done by the aid of the IRDIS cryogenic camera. Ensuring sufficiently low level of differential aberrations between the two parallel images is a major concern for this instrument. We describe the prototyping efforts made in order to validate our concept.
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Kjetil Dohlen, Kjetil Dohlen, Michel Saisse, Michel Saisse, Alain Origne, Alain Origne, Gabriel Moreaux, Gabriel Moreaux, Christophe Fabron, Christophe Fabron, Frederic Zamkotsian, Frederic Zamkotsian, Patrick Lanzoni, Patrick Lanzoni, Frederic Lemarquis, Frederic Lemarquis, } "Prototyping of differential optics for the SPHERE IRDIS dual imaging planet finder camera", Proc. SPIE 7018, Advanced Optical and Mechanical Technologies in Telescopes and Instrumentation, 701859 (25 July 2008); doi: 10.1117/12.789877; https://doi.org/10.1117/12.789877

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