Attenuation sampling device used for large-angle high-energy laser incidence

Abstract

The invention discloses an attenuation sampling device used for large-angle high-energy laser incidence. The device comprises a front panel, an attenuation unit and a rear panel, wherein a straight laser incidence sampling hole is formed in the front panel, a laser exiting hole is formed in the rear panel, the attenuation unit comprises a front transmission window, a rear transmission window and a cylindrical cavity, the cylindrical cavity is arranged coaxial with the straight sampling hole and the laser exiting hole, and the cylindrical cavity is filled with granular optical volume scattering materials. After being coupled into the attenuation unit through the sampling hole, absorbed through inner walls and the materials, and subjected to volume scattering, lasers are emitted out through the laser exiting hole, laser beam energy can be redistributed in a space within a wide range, and the homogenization effect is achieved; meanwhile, large-angle attenuation sampling can be achieved in the laser oblique incidence, the requirement for substantial attenuation of laser power density can be met, and the device can be used for high-spatial-resolution light intensity detection.

Description

technical field [0001] The invention relates to a method for high-energy laser large-angle measurement, in particular to a device for sampling high-energy laser large-angle attenuation by using volume scattering materials. Background technique [0002] In the measurement of high-energy laser parameters, the photodetector array sampling method is often used to obtain the temporal and spatial distribution information of laser spot power density. Since the laser power density at the test position is generally high, it is difficult to directly use the photodetector array to measure, so in the actual test, the measured laser power density needs to be reasonably attenuated to meet the range of the photodetector. scope. [0003] The far-field laser transmitted through the atmosphere usually enters the photodetector array at a certain angle. Due to the uncertainty of atmospheric transmission and the diversity of high-energy laser use, it is necessary to ensure that the photodetecto...

AI Technical Summary

Problems solved by technology

The problem with this processing method is that a large-angle conical hole is hollowed out on the front panel that needs to withstand strong laser irradiation, especially for area array structure detection, which means that the mass of the front panel is reduced and the ability to absorb heat Therefore, the anti-laser damage ability of the front panel is weakened, so that the detector array is easily damaged when it is used for high-power laser energy measurement, and the larger the chamfer angle is, the worse the anti-laser damage ability is, so it is difficult to be used for oblique incidence Laser light intensity attenuation and parameter measurement

In addition, the presence of chamfers increases the distance between the detector arrays, reduces the spatial resolution of the detector arrays, and limits the application range of this method

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