Method for detecting underwater object by relevance imaging
A technology of underwater target and associated imaging, which is applied in the direction of re-radiation, measuring devices, electromagnetic wave re-radiation, etc., can solve the problem that the resolution of remote sensing spectral imaging technology is not very high, and achieve the effect of resolution improvement
Inactive Publication Date: 2010-01-06
GUILIN UNIV OF ELECTRONIC TECH
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But the resolution of remote sensing spectral imaging technology is not very high
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[0021] The instruments and equipment required by the detection method include a high-frequency laser light source, a nonlinear crystal, a beam splitter, an imaging lens, an optical filter, a photoelectric detector, a two-dimensional scanning optical fiber detector and a combined detection device. Its detection method is: use a beam of high frequency (frequency is ω t ) laser to irradiate the second-order nonlinear crystal, every time a high-frequency photon is annihilated, two low-frequency photons will be generated at the same time to form a two-photon light source; the two-photon light source is divided into two different directions by a beam splitter, which are respectively used as signal light (frequency is ω s ) and idler light (frequency ω i ); the signal light passes through an imaging convex lens (with a focal length of f) and an optical filter and shoots to the target object underwater, and the reflected light on the target object is detected by the photodetector D ...
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The invention provides a method for detecting an underwater object by relevance imaging, which comprises the following steps: a pair of quantum entanglement two-photons are obtained by a quantum entanglement effect and respectively used as signal light and idle light; the signal light is projected to an object by an imaging lens, and reflection light carrying object information is received by a detector D1; after being freely transmitted in the certain distance, the idle light enters a scanning detector D2 made of fibers; and a combined detection image of the two detectors is recorded by the coordinate function which corresponds to the fibers when dynamically scanning at the plane of the input end so as to confirm the image information of the object, the depth of the position in which the object is located, and the like. The method can be used for measuring water depth, detecting and recognizing submerged rocks, submarines, fish school, mines and wracks, surveying and mapping submarine geomorphology, and the like; and compared with a remote sensing spectral imaging technology, the method can improves the resolution by several times.
Description
technical field [0001] The invention relates to the detection of underwater targets, that is, a method for detecting underwater targets by using two photons generated by quantum entanglement effect as signal light and idle light respectively. Background technique [0002] The current method of underwater target detection is to use remote sensing spectral imaging technology: the light source is radiated to the water surface, and the underwater target image information is obtained by comparing the reflection information of the water surface and the reflected light information of the target object entering the water. The intensity of reflected light on the water surface is related to the water surface conditions, but except for specular reflections, it generally only accounts for about 3.5% of the incident light; part of the light transmitted into the water is scattered by suspended sediment and organic organisms in the water, forming water scattering. The part of the light tha...
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Login to View More IPC IPC(8): G01S17/08
CPCG01S17/89
Inventor熊显名张丽娟
OwnerGUILIN UNIV OF ELECTRONIC TECH