A kind of polyvinyl alcohol coating on the surface of fused silica, preparation method and application

A technology of polyvinyl alcohol and polyvinyl alcohol solution, which is applied in coatings, instruments, optics, etc., can solve the problems of reduced laser damage threshold of fused silica optical elements, easy damage to the back surface, and reduced laser energy, so as to improve the resistance Laser damage performance, improved laser damage resistance, and simple preparation process
CN108710163BActive Publication Date: 2020-02-07LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS
Publication Date
2020-02-07

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Abstract

The invention provides a quartz watch surface polyvinyl alcohol plated coating layer, a preparation method and application and belongs to the technical field of optical material preparation. The preparation method comprises steps of using a PVDF filtering head with the aperture 0.15-0.30 [mu]m to filter polyvinyl alcohol solution with the mass percent of 0.5%-5% and cooling the solution for standby application; by spinning or pulling-through coating film, plating the polyvinyl alcohol on the back surface of a quartz base sheet with tidy surface; and drying the back surface to obtain the polyvinyl alcohol coating layer. The polyvinyl alcohol coating layer is capable of transferring the distribution of highest electric field intensity from the back surface of the quartz to the coating layer,so the electric field intensity of the back surface of the quartz is reduced. The laser damaged threshold value at the ultraviolet waveband is improved by 10%-20%; and the method is simple in processes, gentle in conditions, easy to control, low in cost, and environmentally friendly and has good application prospects in the field of optical materials.
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Description

technical field

[0001] The invention belongs to the technical field of optical material preparation, and in particular relates to a polyvinyl alcohol coating on the surface of fused silica, a preparation method and an application. Background technique

[0002] Fused silica optical components are widely used in large-scale high-energy laser devices, such as the Shenguang III device in China and the National Ignition Facility in the United States. The surface of fused silica optical components is extremely vulnerable to damage under ultraviolet high-flux laser irradiation, which severely limits the output capability of laser devices and the service life of optical components. Therefore, it is very important to improve the laser-induced damage threshold of fused silica in the ultraviolet band. Significance.

[0003] When the laser pulse acts on the fused silica optical element, due to energy deposition and adsorption, the thermal effect is first generated, and then the plasma ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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