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30 November 2009 Co-phase error correction of the optical sparse aperture system
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Optical sparse-aperture system can be designed to obtain high resolution in astronomical object imaging with several independent small-aperture telescopes. However, the images from separated telescopes are not only overlapped but also have same phase. Ordinarily, the phase of each sub-aperture can be obtained by wave-front sensing technology, such as phase retrieval algorithms, but this method requires more than one CCD and interfere the wave front. In this work, we use the differences between PSFs from each sub-array to get the type and size of the co-phase error. Finally, submit the results to mechanical system as a feedback for phase retrieval. We used Golay-3 system as an example to verify the above conclusions. The output is consistent with the pre-set value within the allowable error. The results show that this method is feasible and reasonable.
© (2009) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Dayong Wang and Juan Zhao "Co-phase error correction of the optical sparse aperture system", Proc. SPIE 7506, 2009 International Conference on Optical Instruments and Technology: Optical Systems and Modern Optoelectronic Instruments, 750626 (30 November 2009);

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