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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…