RAPID COMMUNICATION: Simultaneous in-line and off-axis subsea holographic recording of plankton and other marine particles
RAPID COMMUNICATION: Simultaneous in-line and off-axis subsea holographic recording of plankton and other marine particles
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DOI：
10.1088/0957-0233/12/8/101
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发表时间：
2001-08
影响因子：
2.4
通讯作者：
J. Watson;S. J. Alexander;G. Craig;D. C. Hendry;P. Hobson;R. Lampitt;J. Marteau;H. Nareid;M. Player;K. Saw;K. Tipping
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文献类型：
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作者：
J. Watson;S. J. Alexander;G. Craig;D. C. Hendry;P. Hobson;R. Lampitt;J. Marteau;H. Nareid;M. Player;K. Saw;K. Tipping
光学全息提供了非侵入性，非破坏性的记录生活，能动的有机体和粒子在其自然环境。图像的高分辨率、三维性和“光学切片”可用于识别物种，并计算大小、方向和空间分布。我们开发了一种水下全息照相机，可以同时曝光同轴全息图和独特的离轴全息图，以记录从几微米以上（同轴）到每立方米几十个颗粒的浓度（离轴）的生物体。它可以记录高达50 000厘米3的水柱在一个单一的离轴全息图和3500厘米3的同轴全息图。我们描述了第一次海上部署的相机和成功的记录的浮游生物和海洋雪的全息图的深度为100米的水。
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.