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A broadband laser protection method and structure

A laser protection and wide-band technology, applied in the direction of offensive equipment, weapon types, etc., can solve the problems of lack of protective measures, etc., and achieve the effect of reliable preparation method, short processing time and simple method

Active Publication Date: 2018-10-16
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

[0005] The purpose of the present invention is to aim at existing strong laser signal (laser power density is in 50W / mm 2 For the lack of ideal protective measures, a wide-band dual laser protection method is invented, and a corresponding protective structure is provided at the same time, which is prepared by vanadium pentoxide, sapphire shell design, carbon nanotube suspension configuration, suspension A series of steps of liquid injection and sealing, to obtain a structure capable of wide-band laser protection, which is widely used in the field of visible light and near-infrared laser protection technology

Method used

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  • A broadband laser protection method and structure

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preparation example Construction

[0027] A method for preparing a broadband laser protection structure, comprising the steps of:

[0028] (1) The sapphire material is polished first, and it has a very good surface morphology, and the root mean square surface roughness is kept below 3nm. Before preparing the vanadium oxide film on the sapphire material, first use cotton dipped in detergent to gently scrub the dust and particles on the sapphire surface, then ultrasonically vibrate it in acetone and alcohol for 20 min, and then ultrasonically clean the sapphire in deionized water 20 min.

[0029] (2) Use the radio frequency magnetron sputtering method to plate vanadium pentoxide thin film on the sapphire material. The parameters used are: the oxygen-argon flow ratio is 0.11 (1.8 / 11.3sccm), the substrate temperature is 400 ℃, the sputtering The temperature was 450 °C, the sputtering pressure was 2 Pa, the sputtering time was 35 min, and the sputtering voltage was 315 V.

[0030] (3) During the plating process, t...

Embodiment 2

[0044] Such as figure 1 shown.

[0045] A wide-band laser protection structure, which includes a sapphire shell 4, and the sapphire shell 4 is deposited with a thickness of 300-400 nm (optimally 350 nm) by magnetron sputtering on the incident surface of the laser light source. The vanadium pentoxide thin film layer 1 is provided with a cavity filled with a carbon nanotube suspension 5 in the sapphire shell 4, and the cavity communicates with the liquid injection port 2 passing through the sapphire shell 4, and the carbon nanotube suspension 5 is injected into the cavity through the liquid injection port 2, and a rubber cap capsule 3 is installed on the end of the liquid injection port 2 outside the sapphire case 4 to isolate the cavity from the outside world. The actual detection device of the protective structure of the present invention is as figure 2 shown.

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Abstract

The invention relates to the technical field of surface coatings, nonlinear optics and laser protection, in particular to a broadband laser protection method and structure. The broadband laser protection structure is obtained through the series of steps of preparation of vanadium pentoxide, design of a sapphire shell, preparation of carbon nanotube suspension liquid, and injection and sealing of the suspension liquid. The broadband laser protection structure is widely applied to the technical field of optic intelligent windows and laser protection. The broadband laser protection structure is characterized in that composite multi-element protection is adopted, combined with wave band characteristics of existing various nonlinear optical limiting materials, intensive laser interference signals can be attenuated more effectively through thermally induced phase-transition optical limiting and nonlinear scattering methods, and therefore continuous and adjustable laser protection on the visible light wave band and the near infrared wave band is achieved. The method provided by the invention has the advantages that the process is simple, the rate of finished products is high, and the method is mature and reliable.

Description

technical field [0001] The invention relates to a surface coating and nonlinear optical laser protection technology, in particular to a laser protection technology, in particular to a broadband laser protection method and its structure. Background technique [0002] As one of the important means of warfare under modern high-tech conditions, laser technology is widely used in the military field. In particular, laser weapons have incomparable advantages such as fast (speed of light), precision, and anti-electronic interference, which will bring about profound changes in the future war mode. Among all kinds of laser weapons, laser jamming and blinding weapons have been installed in some western military powers since the 1980s, and there are as many as 7 models publicly reported by the US military alone. The targets of such weapons are mainly human eyes and optoelectronic devices. Such as interference, damage and blinding the vision of photoelectric reconnaissance, artillery, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F41H13/00
CPCF41H13/00
Inventor 张圣斌左敦稳刘星卢文壮徐锋
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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