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Fluid surface imaging using microlens arrays

Roesgen, T. and Lang, A. and Gharib, M. (1998) Fluid surface imaging using microlens arrays. Experiments in Fluids, 25 (2). pp. 126-132. ISSN 0723-4864. doi:10.1007/s003480050216.

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The paper describes a new technique for measuring surface slopes at the air–water interface. A microlens array is employed to optically sample the fluid surface at a large number of measurement points in parallel. The focal plane image of the lenslet array is recorded by a standard video camera, generating a data set of typically 4000 candidate samples for each video frame. The displacement of the focal spots is analyzed using a cross-correlation technique augmented by a topological identification algorithm which makes use of the hexagonal structure of the lenslet array. Surface height profiles are computed by integrating the surface slope field.

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Additional Information:© 1998 Springer Verlag. Received: 19 March 1997; Accepted: 5 January 1998. This work was supported by ONR grant N-00014-94-1-0596.
Funding AgencyGrant Number
Office of Naval Research (ONR)N-00014-94-1-0596
Issue or Number:2
Record Number:CaltechAUTHORS:20130912-081404700
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:41270
Deposited By: Tony Diaz
Deposited On:17 Sep 2013 20:07
Last Modified:10 Nov 2021 04:27

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