Static telescope aberration measurement using lucky imaging techniques |
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Authors: | Marcos López-Marrero Luis Fernando Rodríguez-Ramos José Gil Marichal-Hernández José Manuel Rodríguez-Ramos |
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Institution: | 1. University of La Laguna, La Laguna, Spain 2. Instituto de Astrof??sica de Canarias, Tenerife, Canary Island, Spain
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Abstract: | A procedure has been developed to compute static aberrations once the telescope PSF has been measured with the lucky imaging technique, using a nearby star close to the object of interest as the point source to probe the optical system. This PSF is iteratively turned into a phase map at the pupil using the Gerchberg?CSaxton algorithm and then converted to the appropriate actuation information for a deformable mirror having low actuator number but large stroke capability. The main advantage of this procedure is related with the capability of correcting static aberration at the specific pointing direction and without the need of a wavefront sensor. |
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