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Simultaneous in-line and off-axis subsea holographic recording of plankton and other marine particles

Record type: Article

Optical holography provides non-intrusive, non-destructive recording of living, motile organisms and particles in their natural environment. High-resolution, three-dimensionality and `optical sectioning' of the image allow identification of species and enumeration of size, orientation and spatial distribution. We have developed a submersible holographic camera to simultaneously expose in-line and, uniquely, off-axis holograms to record organisms from a few micrometres upwards (in-line), in concentrations down to a few tens of particles per cubic metre (off-axis). It can record up to 50 000 cm3 of the water column in a single off-axis hologram and 3500 cm3 in an in-line hologram. We describe the first sea deployment of the camera and the successful recording of holograms of plankton and marine snow to a depth of 100 m water.

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Citation

Watson, J., Alexander, S., Craig, G., Hendry, D.C., Hobson, P.R., Lampitt, R.S., Marteau, J.M., Nareid, H., Player, M.A., Saw, K. and Tipping, K. (2001) Simultaneous in-line and off-axis subsea holographic recording of plankton and other marine particles Measurement Science and Technology, 12, L9-L15. (doi:10.1088/0957-0233/12/8/101).

More information

Published date: 2001
Keywords: optical holography, in-line holography, off-axis holography, holographic camera, underwater light, plankton

Identifiers

Local EPrints ID: 63116
URI: http://eprints.soton.ac.uk/id/eprint/63116
ISSN: 0957-0233
PURE UUID: 72ba0d79-fc4c-4f70-a964-787591e1682f

Catalogue record

Date deposited: 11 Sep 2008
Last modified: 17 Jul 2017 14:19

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Contributors

Author: J. Watson
Author: S. Alexander
Author: G. Craig
Author: D.C. Hendry
Author: P.R. Hobson
Author: R.S. Lampitt
Author: J.M. Marteau
Author: H. Nareid
Author: M.A. Player
Author: K. Saw
Author: K. Tipping

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