Misalignments of sub-aperture in segmented or sparse synthetic optical telescope may dramatically degrade image quality. We analytically calculate the point spread function(PSF) for segmented aperture with local rotation, and its ensembleaveraged PSF, correspondingly. We are able to estimate the statistical imaging properties for apertures with random rotation. These results contribute to the fully knowledge of effect of all rigid misalignments. Although derivation herein is mainly in the context of Keck-like aperture, it can be easily generalized to other common segmentation geometries.
Misalignments of sub-aperture in segmented or sparse synthetic optical telescope may dramatically degrade image quality. We analytically calculate the point spread function(PSF) for segmented aperture with local rotation, and its ensembleaveraged PSF, correspondingly. We are able to estimate the statistical imaging properties for apertures with random rotation. These results contribute to the fully knowledge of effect of all rigid misalignments. Although derivation herein is mainly in the context of Keck-like aperture, it can be easily generalized to other common segmentation geometries.
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