Precise assembling structure of large-aperture reflecting mirror used for inertial confinement fusion and pre-tightening method thereof

Abstract

The invention provides a precise assembling structure of a large-aperture reflecting mirror used for inertial confinement fusion and a pre-tightening method thereof. The structure comprises high-precision reflecting mirror elements, mirror frame components, mirror body pressing plates, a gasket, flexible elements, flexible member pressing plates and screws used for installing parts and components. After the reflecting mirror elements are installed in the mirror frames, the mirror body pressing plates press the gasket to perform fixing and pre-tightening at the high-precision film coated reflecting surfaces of the reflecting mirror elements. A rectangular groove is respectively arranged at the circumferential four side surfaces of the mirror frame components, and rectangular through holes are arranged in the middle of the grooves. After the flexible elements are installed in the rectangular through holes, the flexible elements are pressed by the flexible member pressing plates. Precise pre-tightening and even force applying can be performed on the large-aperture laser reflecting mirror elements by the flexible elements under the highly clean optical assembling work environment, and extremely high surface precision can be achieved by the reflecting mirror elements through the closed-loop control mode of "modeling and estimation-assembling and pre-tightening-detection and adjustment" so that precise, clean and high-efficiency assembling of the large-aperture reflecting mirror elements of a high-power solid laser system of an inertial confinement fusion device can be realized.

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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