Abstract
We propose simple distance extraction algorithm for hologram reconstruction in optical scanning holography. By measuring the time-of-flight of the heterodyne beam in optical scanning holography, we can extract the depth information from the object apart by an arbitrary distance. For the timeof-flight, we has constructed the scanning holography and then, we extracted the phase information by using lock-in-amplifier without an additional changes in basic scanning holography setup. Finally, we have reconstructed the reflection-type complex hologram about 10.4mm x 10.4mm object apart from 426mm by this method.
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