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High Sensitivity Wavefront Sensing with a non-linear Curvature Wavefront Sensor
Olivier Guyon
A new wavefront sensing approach, derived from the successful curvature wavefront sensing concept but using a non-linear phase retrieval wavefront reconstruction scheme, is describ…
High Contrast Imaging and Wavefront Control with a PIAA Coronagraph: Laboratory System Validation
Olivier Guyon, Eugene Pluzhnik, Frantz Martinache +5
The Phase-Induced Amplitude Apodization (PIAA) coronagraph is a high performance coronagraph concept able to work at small angular separation with little loss in throughput. We pre…
Coronagraphic Low Order Wavefront Sensor: Principle and Application to a Phase-Induced Amplitude Coronagraph
Olivier Guyon, Taro Matsuo, Roger Angel
High contrast coronagraphic imaging of the immediate surrounding of stars requires exquisite control of low-order wavefront aberrations, such as tip-tilt (pointing) and focus. We p…
Comparison of optical observational capabilities for the coming decades: ground versus space
Matt Mountain, Roeland van der Marel, Remi Soummer +7
Ground-based adaptive optics (AO) in the infrared has made exceptional advances in approaching space-like image quality at higher collecting area. Optical-wavelength applications a…
Aperture Masking Interferometry for Subaru
Frantz Martinache, Olivier Guyon, Vincent Garrel
Aperture Masking Interferometry used in combination with Adaptive Optics, is a powerful technique that permits the detection of faint companions at small angular separations. The p…
The Subaru Coronagraphic Extreme AO project
Frantz Martinache, Olivier Guyon, Julien Lozi +3
High contrast coronagraphic imaging is a challenging task for telescopes with central obscurations and thick spider vanes, such as the Subaru Telescope. Our group is currently asse…
Phase-Induced Amplitude Apodization on centrally obscured pupils: design and first laboratory demonstration for the Subaru Telescope pupil
Julien Lozi, Frantz Martinache, Olivier Guyon
High contrast coronagraphic imaging is challenging for telescopes with central obstructions and thick spider vanes, such as the Subaru Telescope. We present in this paper the first…