Dynamic Characteristics of Forward Light Scattering by Simulated Bubble Film based on CMOS

Jian-sheng, 张建生 Zhang; Jian-peng, 孙建鹏 Sun; Yan, 陈焱 Chen; Xudong, 李旭东 Li; Hua-cheng, 刘华成 Liu

doi:10.3788/gzxb20144301.0101004

Cited by 3 publications

(2 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The theoretical geometric optics of the scattering characteristics of bubbles in water is in good agreement with the Mie scattering theory. Using the Mie scattering effect of the ship wake bubbles on the laser, the detection of the ship wake can be realized, so as to invert the trajectory and velocity characteristics of the ship in the ocean [4,5]. An underwater vehicle equipped with the laser detection system can realize the tracking and striking of the ship.…”

Section: Introductionmentioning

confidence: 99%

Research on Laser Dual-Mode Fusion Detection Method of Ship Wake Bubbles

Zong,

Zhang,

Duan

et al. 2024

Applied Sciences

View full text Add to dashboard Cite

Addressing the issues of weak echo signals and strong background interference in the laser detection of ships’ wakes, an analysis of the laser backscatter detection characteristics of ships’ wakes has been conducted. Based on the Monte Carlo method, a simulation model for the dual-mode fusion detection of ship wake bubbles using laser technology was constructed under different target characteristics. A dual-mode fusion detection system for ships’ wakes was designed, and an indoor experimental platform for the dual-mode fusion detection of ship wake bubbles using laser technology was established. To address problems such as a wide range of echo signal intensity changes, severe signal fluctuations, low resolution, poor image contrast, and blurred target edge information, an algorithm based on multi-timescale hierarchical fusion signal processing and temporal difference accumulation image processing was proposed. Verification experiments for ship wake detection were conducted, which revealed that the dual-mode fusion detection method for ship wake bubbles using laser technology can effectively enhance the detection signal-to-background ratio and counter the maneuvering evasion of underwater weapons by ships. It achieved high sensitivity, large dynamic range, high resolution, and a wide field of view detection and real-time signal processing of ship wake bubble targets of different magnitudes against a strong reverberation background. The effectiveness of the dual-mode fusion detection mode was validated, providing theoretical support for the overall system design and parameter settings.

show abstract

Section: Introductionmentioning

confidence: 99%

Research on Laser Dual-Mode Fusion Detection Method of Ship Wake Bubbles

Zong,

Zhang,

Duan

et al. 2024

Applied Sciences

View full text Add to dashboard Cite

show abstract

“…Mie scattering theory is widely used in calculating the radius of microspheres. XIANG Jian-sheng [2] etc. from Xi'an institute of optics and precision mechanics of CAS worked out the radius distribution of air bubbles in water.…”

Section: Introductionmentioning

confidence: 99%

Simulation and Analysis of Light Scattering by Air Bubble in Optical Glass

Zhang

Wang

et al. 2015

AMR

View full text Add to dashboard Cite

Mie scattering theory is used in this paper to analyze the forward scattered light intensity distribution of an air bubble in the subsurface of optical glass, shining by a monochrome laser with a wavelength of 632.8um. The scattering process can be classified as uncorrelated single scattering .according to the properties of optical media. The finite difference time domain (FDTD) software is used to establish a 3-d simulation model to calculate for forward scattered intensity distribution of different sized air bubbles. Moreover, according to the relationship between Mie scattering intensity pattern and the size of bubbles, the size of bubbles are figured out with the help of neural network algorithm. The errors are lower than 10%. The simulation results can improve the precision of defects detection in optical glass.

show abstract

Laser forward and backward scattering characteristics and experimental study of bubbles in ship wake

Zong,

Chen,

Zhang

et al. 2024

Appl. Opt.

View full text Add to dashboard Cite

The detection and tracking of ships can be realized by using the laser forward and backward scattering characteristics of ship wake bubbles. In this paper, the detection ability of two kinds of scattering to wake bubbles is studied. Based on the distribution characteristics of ship wake and bubble targets, typical bubble targets are selected to study from both micro and macro aspects. The light scattering model of water is established from the microscopic aspect, and the forward and backward scattering light intensity equations of water are derived. The circumferential scattering characteristics of a single bubble are analyzed based on the Mie scattering theory. According to the transmission characteristics of light in wake bubbles, the secondary scattering model of wake bubbles is established, and the forward and backward scattering light intensity equations are derived. In the macroscopic aspect, the laser scattering simulation model of wake bubbles is established by Monte Carlo, and the forward and backward scattering characteristics of wake bubble clusters with different radii, densities, and thicknesses are analyzed emphatically. A laser forward scattering and backscattering detection system under typical bubble characteristics was built, and the composite scattering characteristics of wake bubbles with different parameter characteristics were experimentally analyzed. The theoretical and experimental results show that with the increase of bubble radius, density, and thickness, the amplitude of laser forward scattering signal of bubble groups decreases gradually, the amplitude of backward scattering signal increases gradually, the change rate of forward and backward scattering amplitude increases, and the change rate of backscattering is obviously larger than that of forward scattering. The detection of wake bubbles by backscattering has more characteristic changes than that by forward scattering, and the detection success rate is higher. The research results can provide theoretical and experimental support for the design of a ship wake laser detection system.

show abstract

Dynamic Characteristics of Forward Light Scattering by Simulated Bubble Film based on CMOS

Cited by 3 publications

References 0 publications

Research on Laser Dual-Mode Fusion Detection Method of Ship Wake Bubbles

Research on Laser Dual-Mode Fusion Detection Method of Ship Wake Bubbles

Simulation and Analysis of Light Scattering by Air Bubble in Optical Glass

Laser forward and backward scattering characteristics and experimental study of bubbles in ship wake

Contact Info

Product

Resources

About