Laser & Optoelectronics Progress, Volume. 52, Issue 9, 92201(2015)
Study of Filter-Apodization Phase Diversity Applied in Sparse Aperture
Phase diversity is applied in the sensing of sparse-aperture systems. The accuracy of the wavefront phase estimation and the iteration time are researched by the image noise. The noise reduction is processing for the noise degradation images by the second order butterworth low-pass filter. Meanwhile the image spectrum by filtering and the optical transfer function are being as constraint with apodization to obtain the low frequency area of high signalto-noise ratio, and take the corresponding optical transfer function. The improvement of the object function for the phase diversity is derived after filtering by apodization. Digital simulation indicates that under the condition of different noise intensities, the proposed method can reduce the noise effectively and improve the phase estimation precision, the algorithm iteration time can be reduced simultaneously.
Get Citation
Copy Citation Text
Li Xunwu, Fan Junliu, Hu Mengmeng, Wu Quanying. Study of Filter-Apodization Phase Diversity Applied in Sparse Aperture[J]. Laser & Optoelectronics Progress, 2015, 52(9): 92201
Category: Optical Design and Fabrication
Received: Jan. 23, 2015
Accepted: --
Published Online: Aug. 28, 2015
The Author Email: Xunwu Li (lxw123x@163.com)