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Last name: LAI
First name: Olivier
International audience
Maunakea est l'un des meilleurs sites du monde pour l'observation astronomique. En tant que tel, il a été le lieu de nombreux développements d'optique adaptative (OA). Je m'y suis rendu pour la première fois en 1994 et j'y ai travaillé sur des projets d'optique adaptative pendant 20 ans, à l'observatoire Keck, au TCFH et en 2013, j'ai obtenu un...
Curvature sensing is a very simple and elegant method to measure the Laplacian of the wavefront, based on the conservation of flux irradiance. Its implementation does not require any special optical components and as it is a direct measure of intensity in defocused images, photodiodes or other read-noiseless detectors can be used. Because it is...
Image quality is sensitive to temperature fluctuations on the optical path, even if these are not fully developed turbulence. Thus, it's crucial to control the thermal environment, be it on a test bench in the laboratory, in instruments (e.g., entrance windows, near electronics), within domes and telescope structures. It is especially crucial...
Dome seeing is a known source of image quality degradation, but despite tremendous progress in wavefront control with the development of adaptive optics and environmental control through implementation of dome venting, surprisingly little is known about it quantitatively. We have found evidence of non-Kolmogorov dome turbulence from our...
Dome seeing is a known source of image quality degradation, but despite tremendous progress in wavefront control with the development of adaptive optics and environmental control through implementation of dome venting, surprisingly little is known about it quantitatively. We have found evidence of non-Kolmogorov dome turbulence from our...
Dome seeing is a known source of image quality degradation, but despite tremendous progress in wavefront control with the development of adaptive optics and environmental control through implementation of dome venting, surprisingly little is known about it quantitatively. We have found evidence of non-Kolmogorov dome turbulence from our...
International audience