Acta Optica Sinica, Volume. 27, Issue 9, 1553(2007)
Measurement of Telescope Aberrations Using Phase-Diversity Method
Atmospheric turbulence and telescope aberrations all contribute to image degradation with ground-based telescopes. For measuring the telescope aberration with the disturbance of turbulence, a method based on phase diversity has been developed. Many instantaneous wavefront are independently reconstructed from pairs of simultaneously recorded focused and defocused short-exposure images using phase-diversity method. After that, by averaging these reconstructed wavefronts, the telescope aberrations are separated from dynamic wavefront induced by turbulence. The computer simulation of estimation of telescope aberration using phase-diversity method is conducted. The simulation shows phase-diversity method can estimate the telescope aberrations effectively and root-mean-square error is about 0.08 wavelengths.
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[in Chinese], [in Chinese]. Measurement of Telescope Aberrations Using Phase-Diversity Method[J]. Acta Optica Sinica, 2007, 27(9): 1553