Laser dynamic security examination method

An inspection method and a dynamic safety technology, applied in the field of safety inspection of people-carrying objects, can solve problems such as inability to form three-dimensional images, low resolution, and backwardness

Inactive Publication Date: 2009-07-01
沈阳利泰自控技术有限责任公司
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Problems solved by technology

[0002] At present, the security inspection equipment installed at the entrance of railway stati...

Method used

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  • Laser dynamic security examination method

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Embodiment Construction

[0042] A laser dynamic safety inspection method, comprising a reflector 2, a beam splitter 3, a phase plate 6, a reflector 5, and the light emitted by a helium-neon laser 1 is reflected by the reflector 2, and then divided into two beams of light by the beam splitter 3, one beam Directly shine on the reflector 5, then reflect on the phase plate 6 through the reflector 5, and the other beam is irradiated on the object, and then irradiated on the phase plate 6 through transmission, and the two beams of light interfere on the phase plate 6 to form an interference image , that is, the holographic image that records all the information of the object.

[0043] Then use the laser light emitted by the He-Ne laser to illuminate the holographic image, and input the image information into the computer, so that the internal and external three-dimensional images of the object 4 can be checked immediately.

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Abstract

The invention relates to a laser dynamic security inspection method, which adopts a device comprising a monitor, a laser photography device and an image building device. In security inspection, the laser transmitted from a he-ne laser is reflected via a reflector and is divided into two beams via a light splitter, wherein one light beam is directly transmitted to the reflector to be reflected to a phase plate, the other light beam penetrates an object and reflects the object to the phase plate, the two light beams are interfered on the phase plate to form an interference map; the image building device comprises a he-ne laser, when in imaging, according to the angle of the incident light, the he-ne laser radiates the phase plate to form a three-dimension image to be transmitted to the monitor to be observed. The invention has the advantages that the observation angle of the device can be changed to observe the side surfaces and the shaded parts of the object, the image definition will be reduced while the blocks become smaller. In image construction, each image can be independently displayed without interfering with other images. In shooting, the device can reconstruct different scenes corresponding to the incident illumination beams of different angles. The invention is convenient for storing three-dimension information.

Description

technical field [0001] The invention relates to a security inspection method, in particular to a laser holographic method for security inspection of people's belongings at railways, airports and the like. Background technique [0002] At present, the security inspection equipment installed at the entrance of railway stations and airports is not only backward, but also has low resolution, and cannot form 3D image files. Contents of the invention [0003] The purpose of the present invention is to provide a laser dynamic safety inspection method, which has good intuitiveness, high resolution, can identify various prohibited items, and has practical significance for social stability and anti-terrorism. [0004] The technical solution adopted: [0005] A laser dynamic safety inspection method includes a laser hologram and a laser hologram imaging device. [0006] The Fresnel imaging method is used, that is, the holographic device is placed near the detected component. [00...

Claims

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Application Information

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IPC IPC(8): G01N21/84
Inventor 石宏
Owner 沈阳利泰自控技术有限责任公司
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