A study of the pyramid sensor : analytic theory, simulation and experiment

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dc.contributor.author LeDue, Jeffrey Matthew. en_US
dc.date.accessioned 2008-04-10T06:00:54Z
dc.date.available 2008-04-10T06:00:54Z
dc.date.copyright 2005 en_US
dc.date.issued 2008-04-10T06:00:54Z
dc.identifier.uri http://hdl.handle.net/1828/604
dc.description.abstract The Pyramid Sensor (PS) is a promising wavefront sensor (WFS) for astronomical adaptive optics (AO) due to its potential to increase the number of accessible scientific targets by more efficiently using guide star (GS) photons. This so-called magnitude gain, as well as the key role played by the PS in several novel multi-reference wavefront sensing schemes have generated intense interest in the device. The diffraction based theory of PS and the underlying optical shop test, the Foucault knife-edge test, is reviewed. The theory is applied to calculate the magnitude gain. The impact of the magnitude gain on the number of galaxies accessible to observation with classical A0 on a TMT sized telescope for the Virgo Cluster Catalogue is assessed via simulations. Additional simulation results are shown to elucidate the impact of various parameters of the pyramidal prism on the magnitude gain. The results of experiments conducted in the UVIC A0 lab with a prototype Id PS are discussed. The Id PS uses a novel optical element called a holographic diffuser to linearize the response of the PS to wavefront tilt. The results of calibrating the sensor are given as well as caveats to the use of such a device. The results of using the Id PS to measure a static aberration as well as spatial and temporal characterization of turbulence produced by the UVIC A0 lab's Hot-Air Turbulence Generator are given. en_US
dc.subject.lcsh Large astronomical telescopes en_US
dc.subject.lcsh Optics, Adaptive en_US
dc.title A study of the pyramid sensor : analytic theory, simulation and experiment en_US
dc.contributor.supervisor Crampton, David en_US
dc.degree.department Dept. of Physics and Astronomy en_US

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