SPHERE IFS: the spectro differential imager of the VLT for exoplanets search

R. U. Claudi; M. Turatto; E. Giro; D. Mesa; U. Anselmi; P. Bruno; E. Cascone; V. De Caprio; S. Desidera; R. Dorn; D. Fantinel; G. Finger; R. G. Gratton; L. Lessio; J. L. Lizon; B. Salasnic; S. Scuderi; Kj. Dohlen; J. L. Beuzit; P. Puget; J. Antichi; N. Hubin; M. Kasper

doi:10.1117/12.856647

14 July 2010 SPHERE IFS: the spectro differential imager of the VLT for exoplanets search

R. U. Claudi, M. Turatto, E. Giro, D. Mesa, U. Anselmi, P. Bruno, E. Cascone, V. De Caprio, S. Desidera, R. Dorn, D. Fantinel, G. Finger, R. G. Gratton, L. Lessio, J. L. Lizon, B. Salasnic, S. Scuderi, Kj. Dohlen, J. L. Beuzit, P. Puget, J. Antichi, N. Hubin, M. Kasper

Author Affiliations +

Proceedings Volume 7735, Ground-based and Airborne Instrumentation for Astronomy III; 77350V (2010) https://doi.org/10.1117/12.856647
Event: SPIE Astronomical Telescopes + Instrumentation, 2010, San Diego, California, United States

Abstract

The SPHERE is an exo-solar planet imager, which goal is to detect giant exo-solar planets in the vicinity of bright stars and to characterize them through spectroscopic and polarimetric observations. It is a complete system with a core made of an extreme-Adaptive Optics (AO) wavefront correction, a pupil tracker and diffraction suppression through a variety of coronagraphs. At its back end, a differential dual imaging camera and an integral field spectrograph (IFS) work in the Near Infrared (NIR) Y, J, H and Ks bands (0.95 - 2.32μm), and a high resolution polarization camera covers the optical range (0.6 - 0.9 μm). The IFS is a low resolution spectrograph (R~50) working in the near IR (0.95-1.65 microns), an ideal wavelength range for the detection of giant planet features. In our baseline design the IFU is a new philosophy microlens array of about 145x145 elements designed to reduce as much as possible the cross talk when working at diffraction limit. The IFU will cover a field of view of about 1.7 x 1.7 square arcsecs reaching a contrast of 10^-7, providing a high contrast and high spatial resolution "imager" able to search for planet well inside the star PSF.

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R. U. Claudi, M. Turatto, E. Giro, D. Mesa, U. Anselmi, P. Bruno, E. Cascone, V. De Caprio, S. Desidera, R. Dorn, D. Fantinel, G. Finger, R. G. Gratton, L. Lessio, J. L. Lizon, B. Salasnic, S. Scuderi, Kj. Dohlen, J. L. Beuzit, P. Puget, J. Antichi, N. Hubin, and M. Kasper "SPHERE IFS: the spectro differential imager of the VLT for exoplanets search", Proc. SPIE 7735, Ground-based and Airborne Instrumentation for Astronomy III, 77350V (14 July 2010); https://doi.org/10.1117/12.856647

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