Wake flow bubble detection optical system

An optical system and bubble technology, applied in optics, optical components, photogrammetry/video measurement, etc., can solve problems such as high telephoto capability, high CCD resolution requirements, interference, strong light absorption and scattering effects, etc.

Inactive Publication Date: 2014-07-02
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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Problems solved by technology

[0003] There are still great difficulties in imaging wake bubbles, mainly because: (1) The size of each bubble in the wake bubble curtain has a large dynamic range (μm-mm level). To image bubbles in a complete range, the telescopic ability of the optical system , CCD resolution requirements are high; (2) The speed of bubble deformation, cracking and displacement is fast, and the movement law and attenuation of each bubble are quit...

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  • Wake flow bubble detection optical system
  • Wake flow bubble detection optical system
  • Wake flow bubble detection optical system

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Embodiment Construction

[0019] The present invention proposes a wake bubble detection optical system, the optical principle is as follows figure 1 shown. Including sheet light source 1, front group lens 2, rear group lens 3, rear group lens 3 connection switching mechanism, sheet light source 1 and front group lens 2 are located in the same optical path, rear group lens 3 is multiple groups, and multiple groups of rear group lenses pass through The switching mechanism performs switching, so that a group of rear group lenses 3 and the front group of lenses 2 are correspondingly located on the same optical path. In the present invention, the rear group lens 3 is three groups. Three groups of rear group lenses 3 comprise positive lens and negative lens respectively, and the sum of positive lens and negative lens is at least four. The sheet light source 1 and the front group lens 2 are fixed on the same platform and move synchronously. There is also a switching mechanism between the lens groups. In ord...

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Abstract

The invention provides a wake flow bubble detection optical system which comprises a piece light source, a front set lens and rear set lenses. The rear set lenses are connected with a switching mechanism. The piece light source and the front set lens are placed in a same light path, the number of the rear set lens is multiple, and the rear set lenses are switched through the switching mechanism to enable one set of rear set lens and the front set lens to be correspondingly placed in the same light path. The wake flow bubble detection optical system can achieve subsection shooting of 10-500 micrometers, and small bubbles in wake flow larger than or equal to 10 micrometers can be shot clearly.

Description

technical field [0001] The invention relates to a high-speed microscopic imaging system, in particular to a high-speed microscopic imaging system used in harsh underwater environments. Background technique [0002] Wake turbulence refers to a bubble curtain belt with special physical properties formed in a certain water area after the ship is sailing due to cavitation caused by the rotation of the propeller, broken sea waves, and a large amount of air involved in the waterline. The acquisition of parameters such as the size, velocity, and number density distribution of bubbles in the wake is the basis for studying the physical characteristics of the wake, and it also provides a new technical approach for further research on wake optical guidance. [0003] Wake bubble imaging still has great difficulties, mainly because: (1) The size of each bubble in the wake bubble curtain has a large dynamic range (μm-mm level). , CCD resolution requirements are high; (2) The speed of bub...

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Application Information

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IPC IPC(8): G02B21/36G01C11/00
Inventor 刘西站何俊华薛艳博王维
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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