Relation Between Imaging Quality and Gate-Control Signal of Underwater Range-Gated Imaging System

Jian, 孙健 Sun; Xiaohui, 张晓晖 Zhang; Weilong, 葛卫龙 Ge; Yamin, 周亚民 Zhou

doi:10.3788/aos20092908.2185

Cited by 3 publications

(2 citation statements)

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“…Therefore, ordinary optical imaging technology is usually difficult to obtain ideal imaging effects in underwater environment. In this paper, an imaging system combining range gating and circular-polarized laser imaging is adopted, which mainly has the time difference between the backscattered light and the target reflected light arriving at the imaging receiver device, and only the optical signal of the target reflected beam arriving time is received, so as to eliminate the stray light interference, improve the signal-to-noise ratio of the received data, and further increase the imaging distance and improve the imaging quality [4] . And through the inversion of three-dimensional effects of two-dimensional image information, it can break through the constraints of existing technical approaches to imaging detection ability, and provide technical support for underwater target detection and recognition.…”

Section: Introductionmentioning

confidence: 99%

Design of circular polarization imaging system for underwater laser gating

Liu,

Yang,

Wei

et al. 2024

Sixth Conference on Frontiers in Optical Imaging and Technology: Novel Imaging Systems

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At present, the strategic adjustment of global military has a common trend. With the deepening of the exploration of China's Marine, river and groundwater resources, the military demand of territorial sea sovereignty defense is becoming increasingly urgent. The realization of underwater environment survey, target detection and positioning analysis technology has become an urgent problem to be solved in underwater equipment operation in many fields. The current underwater detection technology is mainly divided into acoustic detection and optical detection. Sound detection has small underwater attenuation, wide detection range and relatively mature technology, but its imaging target identification is difficult, real-time, and is easily subject to Marine noise interference. It is difficult to fully adapt to the needs of many underwater delivery platforms and deep-sea detection operations for high resolution imaging detection, observation and positioning. The underwater photoelectric imaging technology, it has become the necessary equipment for many underwater submersible, underwater operation system and target exploration systems. The underwater laser selected circular polarization imaging system consists of selected circular polarization imaging subsystem, underwater laser radiation source, synchronous timing control subsystem, power supply, integrated display control subsystem and sealing structure. The system mainly adopts the distance selection + polarization laser imaging method, reduces the influence of backscattering on imaging quality through the underwater circular polarization laser imaging system based on distance selection, and establishes the database of the characteristics of underwater circular polarization laser imaging; on this basis, an engineering prototype is built to provide application support for target detection, identification and industrialization.

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Section: Introductionmentioning

confidence: 99%

Design of circular polarization imaging system for underwater laser gating

Liu,

Yang,

Wei

et al. 2024

Sixth Conference on Frontiers in Optical Imaging and Technology: Novel Imaging Systems

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“…It has been widely applied in fields such as target recognition, underwater vision, and 3D imaging. In 2009, Sun Jian [9] studied the relationship between time gating accuracy, time interval, and imaging quality. When the gating signal is appropriate, the influence of water scattering light noise on the distance gated laser underwater imaging system is reduced, and high-quality images are obtained.In 2013, GE Weilong [10] simulated that when the gate width is greater than the laser pulse width, the water backscattered light noise energy received by ICCD is larger and the signal-to-noise ratio(SNR) is lower.…”

Section: Introductionmentioning

confidence: 99%

Optimization analysis of gate width for detecting atmospheric turbulence with DIM LiDAR

ZHOU,

XIE,

et al. 2024

Preprint

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Through theoretical calculations and field experiments, the setting of gate width in distance gating technology has been optimized in DIM LiDAR. The mathematical relationship between gate width and detection distance has been derived. The relationship curves between gate width and image signal-to-noise ratio(SNR), as well as gate width and atmospheric refractive index structure constant $C_n^2$ were obtained. The results indicate that at a constant detection distance, there is a gradual increase in the SNR of the image with increasing gate width, followed by a saturation point. The higher the SNR, the closer the inverted $C_n^2$ is to the ultrasonic anemometer. Meanwhile, if the SNR is similar, the inverted $C_n^2$ is similar. Finally, the appropriate gate width for this system is given.

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Optimization analysis of gate width for detecting atmospheric turbulence with differential image motion LiDAR

Zhou,

Xie,

et al. 2024

Appl. Phys. B

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Relation Between Imaging Quality and Gate-Control Signal of Underwater Range-Gated Imaging System

Cited by 3 publications

References 0 publications

Design of circular polarization imaging system for underwater laser gating

Design of circular polarization imaging system for underwater laser gating

Optimization analysis of gate width for detecting atmospheric turbulence with DIM LiDAR

Optimization analysis of gate width for detecting atmospheric turbulence with differential image motion LiDAR

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