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发明公开
CN105700321A 基于重建像强度方差的数字全息图在焦重建距离判断方法 失效 - 权利终止

基于重建像强度方差的数字全息图在焦重建距离判断方法
摘要：
本发明公开了一种基于重建像强度方差的数字全息图在焦重建距离判断方法，属于光学精密测量技术领域中的数字全息图重建距离的自动化数值判断方法，其目的在于提供一种基于重建像强度方差的数字全息图在焦重建距离判断方法。本发明利用重建像强度的方差与重建像强度的平均值的比值对重建像的清晰程度进行判断、分析，并找到清晰的重建强度像及其所对应的数字全息图准确重建距离，该方法可实现对于数字全息图重建距离的自动化数值判断，提高对重建距离的测量精度及测量效率。
摘要（英）：

The invention discloses a method for judging the focal reconstruction distance of a digital hologram based on the intensity variance of a reconstruction image, belonging to a method for judging an automatic numerical value of the reconstruction distance of the digital hologram in the technical field of precise optical measurement. According to the invention, the clear degree of the reconstruction image is judged and analyzed by utilizing the ratio of the intensity variance of the reconstruction image to the average value of the intensity of the reconstruction image; a clear reconstruction intensity image and the corresponding accurate reconstruction distance of the digital hologram are found out; by means of the method, judgement of the automatic numerical value of the reconstruction distance of the digital hologram can be realized; and the measurement precision and the measurement efficiency of the reconstruction distance are increased.

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