As an optical misalignment sensing technique, phase diversity can estimate the pupil phase from pairs of simultaneously recorded focused and defocused images, then the misalignment error is obtained.
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- 基于相位差法的检测技术,主要是利用在焦面和离焦位置上同时采集的一对图像,对光瞳上的相位分布进行恢复,从而得出子望远镜间的微小失调误差。