Monte Carlo simulating and optimization design method of underwater laser active imaging system

A Monte Carlo simulation and imaging system technology, applied in optics, optical components, instruments, etc., to achieve the effect of ensuring work performance and improving imaging contrast

Active Publication Date: 2018-08-14
SHANGHAI UNIV
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Problems solved by technology

[0003] The purpose of the present invention is to provide a Monte Carlo simulation and optimization design method for the underwater laser active imaging system, so as to improve the imaging quality of the imaging system by focusing on the problem of the reflected light point contrast of the active laser imaging system.

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  • Monte Carlo simulating and optimization design method of underwater laser active imaging system
  • Monte Carlo simulating and optimization design method of underwater laser active imaging system
  • Monte Carlo simulating and optimization design method of underwater laser active imaging system

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Embodiment Construction

[0057] In the following, the present invention will be further described by taking a laser synchronous scanning triangulation ranging imaging system as a specific embodiment in conjunction with the accompanying drawings.

[0058] Such as figure 1The basic optical path diagram of the system shown in the figure, 1 is the laser, 2 is the vibrating mirror coated with reflective film on both sides, 3 is the plane mirror, 4 is the measured object, 5 is the plane mirror, 6 is the imaging objective lens, 7 is the line CCD. Laser 1 emits a collimated laser beam which is reflected by the upper surface of vibrating mirror 2, and then reflected by plane reflector 3, illuminating point Q on the surface of object 4 to be measured, and the reflected light at point Q is reflected by plane reflector 5, and then Reflected by the lower surface of the vibrating mirror 2, it is imaged by the imaging objective lens 6 to the point Q' on the line CCD 7. According to the principle of synchronous scan...

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Abstract

The invention relates to a Monte Carlo simulating and optimization design method of an underwater laser active imaging system. According to the scattering and absorbing characteristics of different water qualities, for the underwater laser active imaging system, parameters and performance of the system are correspondingly optimized and designed through a Monte Carlo simulating method, and therefore the imaging contrast of reflection light spots or light strips is improved, and the implementation of a system measuring principle is ensured. The method includes the steps of establishing a three-dimensional entity model according to the specific imaging system, and completing the tracking and statistics of the whole movement trajectory of photons through the movement of iterative photons through the inherent characteristics of a defined light source and a defined water body and a target surface scattering model. According to the method, the synchronous scanning triangular ranging underwater laser active imaging system serves as an embodiment; by means of the method, the contrast of a scanning light spot reflection image is obtained; by changing system parameters and repeating the simulation, a corresponding relation curve is obtained; finally, through comprehensive consideration, system optimization design parameters are determined.

Description

technical field [0001] The invention belongs to the technical field of underwater visual imaging, and in particular relates to a Monte Carlo simulation and optimization design method of an underwater laser active imaging system. Background technique [0002] Underwater optical imaging, especially underwater active laser imaging technology, has higher imaging resolution than underwater acoustic imaging, so it has important application value in ocean exploration and marine military. Various underwater laser active imaging systems such as underwater synchronous scanning triangulation ranging imaging system and structured light imaging system have appeared in the prior art. However, due to the strong absorption and scattering optical properties of the water medium, the laser propagation under water is greatly attenuated, which limits the detection distance and affects the imaging quality of the underwater laser imaging system. Therefore, how to reasonably design the underwater ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B27/00
CPCG02B27/0012
Inventor 屠大维肖国梁张旭
Owner SHANGHAI UNIV
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