A pressure self-balancing optical lens packaging structure for deep-sea instruments

Abstract

The invention discloses a pressure self-balancing type deep-sea instrument optical lens package structure, and relates to the technical field of deep-sea optical detection equipment. The pressure self-balancing deep-sea instrument optical lens packaging structure includes: a sealing end cover, one side of the sealing end cover is provided with an axial sealing ring and a radial sealing ring, and the other end of the sealing end cover is provided with A first annular notch; an optical window pressing plate, a second annular notch matching the first annular notch is provided at one end of the optical window pressing plate. In the present invention, by changing the sealing structure between the optical window pressing plate and the optical window, a gap is left at the contact part between the optical window pressing plate and the end surface of the optical window, so that the optical window pressing plate and the optical window can automatically balance most of the seawater pressure, and the optical window is solved. The pressure plate is deformed by high pressure, causing the optical window to be crushed, and the optical window is deformed by external pressure, which leads to the problem that the optical signal cannot be transmitted and collected smoothly.

Description

technical field [0001] The invention relates to the technical field of deep-sea optical detection equipment, in particular to a pressure self-balancing optical lens packaging structure for deep-sea instruments. Background technique [0002] The velocity of seafloor hydrothermal fluids is of great significance to the study of the output flux of seafloor hydrothermal vents, the change of seafloor geological structure, and the distribution of biological communities. The deep-sea optical detection instrument based on the principle of laser Doppler velocimetry is a necessary basic test method for the study of flow velocity, and the package structure of the measurement system, as the carrier of internal components, is the premise to ensure the safety, reliability and convenience of the system. Stability and reliability play a vital role in the stability of the entire project. [0003] The working conditions of deep-sea optical detection instruments based on the principle of laser...

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Problems solved by technology

[0005] Under the condition of deep external pressure, especially the huge external pressure of 7,000 meters in the deep sea, the optical observation window is easily deformed or even crushed by the external pressure; at the same time, the deep-sea optical detection instrument based on the principle of laser Doppler velocity measurement, the The two beams of optical signals are greatly affected by the interference of the external environment. The optical window is deformed by the external pressure, which will cause the refractive index of the medium to change, and finally lead to the change of the optical path of the two beams of optical signals, so that the optical signals cannot be collected at the hydrothermal place. and return to the receiving lens group

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