| 数字全息重建图像的焦深研究 |
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| 引用本文： | 李俊昌.数字全息重建图像的焦深研究[J].物理学报,2012,61(13):134203-134203. |
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| 作者姓名： | 李俊昌 |
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| 作者单位： | 昆明理工大学理学院,昆明,650093 |
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| 基金项目： | 国家自然科学基金(批准号: 60977007) 资助的课题. |
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| 摘 要： | 将来自物体的散射光视为物体表面相位随机取值的大量点源发出光波的叠加, 对数字全息重建像及离焦像的衍射场进行研究. 基于重建像以像素为单位显示的特点, 对焦深作出新的定义, 然后, 根据重建像的像素物理尺寸与计算方法相关的特点, 推导出不同重建算法重建图像的焦深表达式, 最后给出相关的实验证明.
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| 关 键 词： | 数字全息 波前重建 相干光成像焦深 |
| 收稿时间： | 2011-09-23 |
Focal depth research of digital holographic reconstructed image |
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| Li Jun-Chang.Focal depth research of digital holographic reconstructed image[J].Acta Physica Sinica,2012,61(13):134203-134203. |
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| Authors: | Li Jun-Chang |
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| Institution: | Faculty of Science, Kunming University of Science and Technology, Kunming 650093, China |
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| Abstract: | Regarding the object scattering light as a superposition of light waves emitting from a lots of point sources on object surface of which phases have random values, in the paper, wee investigate the diffracted field of digital holographic reconstructed image and defocused image. The definition of depth of focal (DOF) is also given based on the feature that the reconstructed image is displayed in pixels. According to the characteristic that the physical dimensions of pixel are associated with computation method, focal depth expressions are deduced when image is reconstructed with different algorithms. Finally, experimental verification is given. |
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| Keywords: | digital holography wavefront reconstruction focal depth of coherent imaging |
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