Device and method for measuring underwater environment polarized light transmission characteristics

A technology of underwater environment and transmission characteristics, which is applied in the direction of measuring devices, optical radiation measurement, polarization influence characteristics, etc., to achieve the effects of saving measurement costs, avoiding uncontrollable factors, and high confidence

Active Publication Date: 2020-05-12
CHANGCHUN UNIV OF SCI & TECH
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Problems solved by technology

The law of the transmission characteristics of polarized light in the underwater environment cannot be fully grasped, so a new technical solution is urgently needed in the existing technology to solve this problem

Method used

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  • Device and method for measuring underwater environment polarized light transmission characteristics
  • Device and method for measuring underwater environment polarized light transmission characteristics

Examples

Experimental program
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Embodiment 1

[0031] Step 1, use milk, artificial sea salt and purified water to configure different water solutions: solution 1, solution 2, solution 3, solution 4; add solution 1 into the glass tank 6;

[0032] Step 2. Remove the 1 / 4 wave plate 5, adjust the polarizer to 0°, turn on the laser, and the device emits 0° linearly polarized light;

[0033] Step 3, turn on the optical power meter 10, measure one path of outgoing light from the energy splitting prism 7, and adjust the optical filter at the same time to ensure that the light intensity value of the other path of outgoing light is appropriate, and record the data at the same time;

[0034] Step 4: The other beam passes through the polarization beam splitter 8, and the photovoltage value V of the horizontal polarization P in the beam is measured by the photodetector I9 and the photodetector II11 P and vertically polarized S photovoltage value V S measurement, and use (V P -V S ) / (V P +V S ) to calculate the polarization degree ...

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Abstract

The invention, which belongs to the technical field of polarization transmission detection, discloses a device and method for measuring underwater environment polarized light transmission characteristics. The device comprises a light source, a light beam shaping lens, an optical filter, a linear polarizing film, a 1 / 4 wave plate, a glass water tank, an energy splitting prism, a polarization splitting prism, a photoelectric detector I, an optical power meter and a photoelectric detector II; the light source, the light beam shaping lens, the light filter, the linear polarizing film, the 1 / 4 waveplate, the glass water tank, the energy splitting prism, the polarization splitting prism and the photoelectric detector I are sequentially arranged on the same optical axis; the optical power meteris arranged in the reflection direction of the beam splitter prism; and the photoelectric detector II is arranged in the reflection direction of the polarization splitting prism. Polarization and energy of circularly polarized light, linearly polarized light and other polarized light in a fixed special initial state after transmission in different underwater environments are tested, underwater environment polarized light transmission characteristics are analyzed and obtained, and underwater target detection and recognition performance can be improved.

Description

technical field [0001] The invention belongs to the technical field of polarization transmission detection, and in particular relates to a measurement device and method for the transmission characteristics of polarized light in an underwater environment. Background technique [0002] With the development of modern optical technology, underwater optical detection has become more and more widely used. Light transmission in the underwater environment produces stray light, which seriously affects optical intensity imaging and reduces optical imaging performance and image contrast. Utilizing the change law of the polarization characteristics of the incident polarized light during underwater transmission, the target information light and background scattered light in the scene can be separated, the contrast and clarity of the imaging image can be improved, and the probability of underwater target detection and recognition can be improved. The law of the transmission characteristi...

Claims

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Application Information

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IPC IPC(8): G01J4/00G01J4/04G01N21/21
CPCG01J4/00G01J4/04G01N21/21Y02A90/30
Inventor 付强贺敬航张肃战俊彤赫立群段锦姜会林
Owner CHANGCHUN UNIV OF SCI & TECH
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