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Refocus criterion for both phase and amplitude objects in digital holographic microscopy

机译:数字全息显微镜中相位和幅度对象的重新聚焦标准

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摘要

For digital holographic microscopy applications, we modify the focus criterion based on the integration of the amplitude modulus to make possible its use regardless of the phase or amplitude nature of the objects under test. When applied on holographic data, the original criterion gives, at the focus plane, a minimum or a maximum, for amplitude or phase objects. The criterion we propose here operates on high-pass filtered complex amplitudes. It is shown that the proposed criterion gives a minimum for both types of objects when the focus plane is reached. Experimental results on real samples and simulations are provided, illustrating the efficiency and the potential of the method.
机译:对于数字全息显微镜应用,我们基于振幅模量的积分来修改聚焦标准,以使其不受测试对象的相位或振幅性质的影响而成为可能。当应用于全息数据时,原始标准会在焦平面上给出振幅或相位对象的最小值或最大值。我们在此提出的标准适用于经过高通滤波的复振幅。结果表明,当达到聚焦平面时,所提出的标准为两种物体提供了最小值。提供了在真实样品上的实验结果和模拟结果,说明了该方法的效率和潜力。

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