Adaptive restoration of a partially coherent blurred image using an all-optical feedback interferometer with a liquid-crystal device.
Adaptive restoration of a partially coherent blurred image using an all-optical feedback interferometer with a liquid-crystal device.
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DOI：
10.1364/josaa.19.000369
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发表时间：
2002-02
期刊：
影响因子：
--
通讯作者：
T. Shirai;T. Barnes
中科院分区：
文献类型：
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作者：
T. Shirai;T. Barnes
采用全光反馈干涉术的液晶自适应光学系统，通过位相扰动实现部分相干成像。基于交叉光谱密度传播的理论分析表明，原则上可以恢复由于位相扰动而产生的模糊图像，而与照亮物体的光的相干状态无关。用He-Ne激光空间相干光和卤素灯空间非相干白光两种情况对理论进行了实验验证。我们观察到，在这两种情况下，在自适应光学系统被激活后，由于相位扰动而模糊的图像立即被成功地恢复，这与理论一致。文中还讨论了实验结果与理论偏差的来源，以及我们的光学装置所固有的反馈失调的影响。
A liquid-crystal adaptive optics system using all-optical feedback interferometry is applied to partially coherent imaging through a phase disturbance. A theoretical analysis based on the propagation of the cross-spectral density shows that the blurred image due to the phase disturbance can be restored, in principle, irrespective of the state of coherence of the light illuminating the object. Experimental verification of the theory has been performed for two cases when the object to be imaged is illuminated by spatially coherent light originating from a He-Ne laser and by spatially incoherent white light from a halogen lamp. We observed in both cases that images blurred by the phase disturbance were successfully restored, in agreement with the theory, immediately after the adaptive optics system was activated. The origin of the deviation of the experimental results from the theory, together with the effect of the feedback misalignment inherent in our optical arrangement, is also discussed.