Depth field imaging monitoring apparatus for medium or small ocean plankton

Abstract

The invention provides a depth field imaging monitoring apparatus for medium or small ocean plankton, which includes a underwater imaging sealed cabin, a depth field imaging illumination sealed cabin and a support frame. An LED for providing illumination beam is provided in the depth field imaging illumination sealed cabin which is fixed onto the support frame. An object lens, a digital imaging system and a digital image data collecting card are provided in the underwater imaging sealed cabin. An optical window is opened on the wall of the underwater imaging sealed cabin opposite to the depth field imaging illumination sealed cabin, and the underwater imaging sealed cabin is fixed on the support frame. The invention is capable of suppressing diffraction effect generated during transmission of non-imaging beam along the imaging optical path, greatly improving image quality of underwater images, enhancing accuracy of plankton object determination.

Description

technical field [0001] The invention relates to a marine animal monitoring device, in particular to a depth-of-field imaging monitoring device for small and medium-sized marine zooplankton. Background technique [0002] Marine zooplankton (zooplankton body length range: 200μm-4mm) occupies an extremely important position in the marine ecosystem, and is an important nutritional link between traditional food chains. Its quantity changes and spatial distribution affect the functioning of the entire marine ecosystem. , and even global climate change will play an important role. The traditional plankton on-site observation methods use simple plankton trawling or collecting water samples to detect plankton abundance or plankton mass (wet weight or dry weight). These methods have many problems and cannot meet the needs of today's plankton research. Specifically reflected in: ①Trawling reflects the sum of plankton collected in long-distance horizontal or vertical directions, and it...

AI Technical Summary

Problems solved by technology

These beams in the imaging optical path will be scattered by suspended particles in seawater, resulting in backscattering and forward scattering effects. These scattered lights are imaged on the digital camera together with the imaging beams, resulting in blurred images and decreased contrast. , especially when the imaging device is towed underwater, due to the multiple scattering caused by the suspended particles brought about by the movement, the image quality will further deteriorate and it will be difficult to distinguish the species of zooplankton

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