Abstract
This paper presents a digital method for detecting the position of small particles distributed in 3-D space from in-line hologram patterns. The detection is carried out by numerically reconstructing the real image of the particles from observed hologram patterns. This method is called full volume digital holography in this paper because the real images are reconstructed in 3-D space over the full range of measurable depth. The measurement accuracy of the present method is evaluated in numerical simulation and experiment. It is shown in numerical simulation that the RMS error in depth is 0.55mm for the range from 200 to 300mm, and the experimental results also show the high measurement accuracy of the present method.
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