Obtaining information through the atmosphere at the diffraction limit of a large aperture
- 1 July 1975
- journal article
- Published by Optica Publishing Group in Journal of the Optical Society of America
- Vol. 65 (7) , 755-759
- https://doi.org/10.1364/josa.65.000755
Abstract
An analysis is made which shows that if the pupil plane of a large telescope is relayed into a special achromatic prism interferometer of 180° rotational shear and with point symmetry, the second statistical moment of the pupil irradiance fluctuations reveals information about the source two-dimensional mutual coherence function (MCF) at spatial frequencies that, under ordinary conditions, are severely attenuated by propagation through the atmosphere. To obtain a measure of the MCF at points across the telescope pupil simultaneously, it is necessary to use a two-dimensional photo-electronic array detector, with real-time processing.Keywords
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