Precise assembly structure and preloading method of large-aperture mirrors for inertial confinement fusion

Abstract

A precision assembly structure and pre-tightening method of a large-diameter mirror for inertial confinement fusion, the structure includes a high-precision mirror element, a mirror frame assembly, a mirror body pressure plate, a gasket, a flexible element, a flexible piece pressure plate and installation parts Screws; after the mirror element is installed in the frame, on its high-precision coating reflection surface, the mirror body pressure plate is used to press the gasket to fix and pre-tighten; in the circumferential direction of the frame assembly, there is a rectangular groove on the four sides , there is a rectangular through hole in the middle of the groove; after the flexible element is loaded into the rectangular through hole, it is pressed by the flexible element pressure plate; in the high-clean optical assembly working environment, the flexible element can accurately control the large-diameter laser mirror element Preload and uniform force, the mirror element can achieve extremely high surface shape accuracy through the closed-loop control method of "modeling estimation-assembly preload-detection adjustment", realizing the large-aperture mirror of the high-power solid-state laser system of the inertial confinement fusion device Precise, clean and efficient assembly of components.

Description

technical field [0001] The invention relates to the field of precision manufacturing and assembly of large-diameter optical elements in high-power solid-state laser drivers in laser inertial confinement fusion devices, in particular to a precision assembly structure and preloading method of large-diameter mirrors for inertial confinement fusion. Background technique [0002] Laser inertial confinement fusion devices widely use thousands of large-aperture optical elements to complete the amplification, filtering and transmission of kilojoule-level energy laser beams, and finally realize the precise convergence of strong laser beams to generate fusion reactions. special physical conditions. The transmission mirror is the largest optical device in a high-power solid-state laser device. It plays important functions such as position adjustment, direction alignment, and optical path matching (making the optical path of each laser beam the same) for the laser beam during the groupi...

AI Technical Summary

Problems solved by technology

Therefore, during the assembly process of the large-diameter laser mirror, the deviation of the clamping force at each fastening point on the mirror element is too large and the uniformity is poor, resulting in uneven stress distribution of the optical element, poor surface shape accuracy, large errors, and The complex operation process of assembly preload, detection and adjustment, long working cycle and other prominent problems have made it difficult to meet the urgent needs of laser inertial confinement fusion devices for precise and efficient assembly technology of large-aperture optical components

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