Concept
4-Deep Inwater Imaging HoloSea S7 submersible holographic microscope
| URI | http://vocab.nerc.ac.uk/collection/L22/current/TOOL1649/2/ | ||
|---|---|---|---|
| Within Vocab | SeaVoX Device Catalogue | ||
| Alternative Labels | 4-Deep HoloSea S7 | ||
| Definition | A submersible holographic microscope for use in water profiling and monitoring applications, as well as particle, phytoplankton and zooplankton imaging for counts and morphological analysis. It outputs up to 22 images per second in real-time. It uses the principle of digital inline holography (DIH) to produce enlarged images of an object and its 3D structure. A laser is directed into a pinhole from which a spherical wave emanates. The wave illuminates the object and forms a geometrically magnified diffraction pattern on a charged couple device (CCD) screen. The interference pattern produced is displayed as a hologram stored as a digital image. The 3D structure of the object from the 2D hologram is reconstructed using a numerical algorithm (Kirchhoff-Helmholtz transform). The HoloSea S7 can be towed at 8 knots. The laser light source has a wavelength of 405 nm. It is pressure rated to 500 m with a cable depth of 100 m, but custom 6000 m rated models are also available. | ||
| Date | 2023-04-13T09:19:28 | ||
| Identifier | SDN:L22::TOOL1649 | ||
| Note | accepted | ||
| Is Version Of | TOOL1649 | ||
| Previous Version | 1 | ||
| version | 2 | ||
| Broader | L05:LAB51 |
holographic microscopes | |
| Related | B75:ORG01770 |
4-Deep | |
L35:MAN0147 |
4-Deep Inwater Imaging | ||
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