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

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).

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


Local EPrints ID: 63116
ISSN: 0957-0233
PURE UUID: 72ba0d79-fc4c-4f70-a964-787591e1682f

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

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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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