Journal article
Spatial filtering velocimetry for real-time measurements of speckle dynamics due to out-of-plane motion
This paper describes an optical spatial filtering velocimetry technique that converts an expanding or contracting speckle pattern into a photocurrent. This photocurrent will have a quasi-sinusoidal dependency on this specific speckle motion. The spatial filter consists of a series of concentric rings.
Each ring divides the incoming light into two radial-wise, almost even contributions and directs them by refraction toward two half-rings of photodetectors. The corresponding two photocurrents are balanced and provide a differential photocurrent. In this paper the optical spatial filtering velocimetry technique is used to demonstrate real-time measurements of speckle dynamics due to out-of-plane motion.
Language: | English |
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Year: | 2016 |
Pages: | 3858-3865 |
ISSN: | 15394522 , 00036935 and 1559128x |
Types: | Journal article |
DOI: | 10.1364/AO.55.003858 |
ORCIDs: | Jakobsen, Michael Linde |