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Proceedings Paper

Development and sea trials of a subsea holographic camera for large volume in-situ recording of marine organisms
Author(s): John Watson; Stephen J. Alexander; Gary Craig; David C. Hendry; Peter R. Hobson; R. S. Lampitt; J.-M. Marteau; Helge Nareid; J. J. Nebrensky; Michael A. Player; Kevin Saw; Keith Tipping
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Paper Abstract

We describe the development, construction and sea testing of An underwater holographic camera (HoloCam) for in situ recording of marine organisms and particles in large volumes of sea water. HoloCam comprises a laser, power supply, holographic recording optics, and plate holders, a water- tight housing and a support frame. Added to this are control electronics such that the entire camera is remotely operable and controllable from ship or dock-side. Uniquely the camera can simultaneously record both in-line and off-axis holograms using a pulsed frequency double Nd:YAG laser. In- line holography is capable of producing images of organisms with a resolution of better than 10 micrometers . Off-axis holograms of aquatic systems of up to 50,000 cm3 volume, have been recorded. Following initial laboratory testing, the holo-camera was evaluated in an observation tank and ultimately was tested in Loch Etive, Scotland. In-line and off-axis holograms were recorded to a depth of 100 m. We will present result on the ste dives and evaluation of the camera performance.

Paper Details

Date Published: 3 June 2002
PDF: 7 pages
Proc. SPIE 4659, Practical Holography XVI and Holographic Materials VIII, (3 June 2002); doi: 10.1117/12.469302
Show Author Affiliations
John Watson, Aberdeen Univ. (United Kingdom)
Stephen J. Alexander, Aberdeen Univ. (United Kingdom)
Gary Craig, Aberdeen Univ. (United Kingdom)
David C. Hendry, Aberdeen Univ. (United Kingdom)
Peter R. Hobson, Brunel Univ. (United Kingdom)
R. S. Lampitt, Southampton Univ. (United Kingdom)
J.-M. Marteau, Quantel SA (France)
Helge Nareid, Aberdeen Univ. (United Kingdom)
J. J. Nebrensky, Brunel Univ. (United Kingdom)
Michael A. Player, Aberdeen Univ. (United Kingdom)
Kevin Saw, Southampton Univ. (United Kingdom)
Keith Tipping, Southampton Univ. (United Kingdom)


Published in SPIE Proceedings Vol. 4659:
Practical Holography XVI and Holographic Materials VIII
Sylvia H. Stevenson; T. John Trout; Stephen A. Benton; Sylvia H. Stevenson; T. John Trout, Editor(s)

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