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Deep Sea Optical Illumination and Imaging System

May.25, 2023

►Deep Sea Optical Imaging System


 

As underwater robots, manned submersibles and landers, and other deep-sea equipment "eyes" - deep-sea optical imaging detection has the advantages of high resolution, a large amount of data, good real-time and in situ detection, is an important means of deep-sea science and engineering research, to avoid the deep sea exploration It avoids the embarrassment of "blind men feeling the elephant". As the vision system of deep-sea equipment, deep-sea optical imaging detection system makes deep-sea exploration become "clear at a glance", and becomes the core support technology for deep-sea mineral development, deep-sea resource survey, and deep-sea biological and chemical activities exploration, which is an important technical basis for China to use the ocean and develop the ocean.

 

►Deep Sea Optical Lighting System


 

Light is a form of electromagnetic wave, and its energy propagation in the water is according to the "exponential" decay, generally underwater 200m below the visible light illumination is less than 0.01% of the surface illumination, and in the deep sea below 1000m, the surrounding environment is dark, so almost all deep-sea optical imaging systems are.
Therefore, almost all deep-sea optical imaging systems are active imaging systems, which need deep-sea illumination systems as support.
In the development of deep-sea lighting equipment, foreign countries started relatively early. China's deep-sea lighting system research and development started late, and now there are many units have carried out relevant research. Deep-sea optical lighting systems can be further subdivided into three smaller subsystems: light source system, light distribution system, and lamp array system.

 

►Deep Sea Camera System


 

According to the application field and technical characteristics of deep-sea optical imaging deep-sea optical camera systems can be mainly divided into six categories: underwater general imaging cameras, laser imaging cameras, polarization imaging cameras, stereo/panoramic imaging cameras, microscopic imaging cameras, spectral imaging cameras. The main categories of deep-sea optical camera systems are underwater general imaging cameras, laser imaging cameras, polarization imaging cameras, stereo/full-view imaging cameras, microscopic imaging cameras, and spectral imaging cameras.

The system mentioned above cannot be applied without the support of optical lenses - optical plano-convex lenses. These lenses are ideal for focusing parallel light rays to a single point and can be used in a variety of applications. They have a positive focal length and a near-optimal profile for infinity and finite conjugate applications. Plano-convex lenses can converge a collimated beam on a back focus or turn a point source into a collimated beam.

RZ Optical Co., Ltd. From sourcing high-quality optical materials to inspecting optical components, RZ Optics has a complete production system and some advanced production facilities. We use standard polishing and grinding techniques to provide custom sizes of red flat-convex lenses made from a variety of substrate materials: various optical glasses, optical infrared silicon, ultraviolet fused silica (JGS1), infrared fused silica (JGS3), sapphire, and most other optical materials.

 

Deep Sea Optical Illumination and Imaging System

 

►Underwater General Imaging Camera


Underwater general imaging technology mostly uses glass windows with cameras
The technique is widely used because it is low-cost and can fulfill many observation needs. The technique is widely used because it is low-cost and can fulfill many observation needs. However, due to the effects of seawater refraction, light attenuation, and slow movement of the submersible in the deep sea environment refractive index, light attenuation, and slow submersible movement, it is critical to design an optical camera imaging system with a large field of view, high resolution, variable focal length, and high-pressure resistance.
The optical camera imaging system with a large field of view, high resolution, variable focal length, and high-pressure resistance is critical. Manned submersible.
The change of the viewport from flat to spherical is an important example of optical system adjustment.
The change of the viewport from flat to spherical is an important case of optical system adjustment, thus meeting the demand for a large field of view. International manufacturers of There are many international manufacturers of deep-sea cameras and cameras.

 

►Laser imaging cameras


There is a common point in deep-sea optical imaging, that is, a large amount of scattered light during the imaging process can affect the contrast of the image. In order to reduce the impact of scattered light on the imaging quality, scientists from various countries have improved the illumination and imaging methods. Underwater laser imaging technology is developed on the basis of common optical imaging technology by taking advantage of the low backward scattering component of laser light. Its imaging distance can reach 6 attenuation lengths. This type of imaging system is mainly used in poor water quality environment and long distance imaging. It is most commonly used in aircraft residuals and oil and gas pipeline inspection.

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