Curvature error adjustment device and method for large-diameter splicing mirror

Abstract

The invention relates to the field of active optics technology, in particular to a curvature error adjustment device and method for a large-diameter spliced ​​mirror; The periphery of the back of the mirror pushes and pulls the peripheral push-pull mechanism opposite to the force of the central push-pull mechanism; the central push-pull mechanism includes the actuator, the flexible joint below the actuator and the connecting piece above the actuator, and the flexible joint below the actuator is bonded In the center of the back of the mirror; the peripheral push-pull mechanism includes a connecting rod, a flexible joint above the connecting rod, and a flexible joint below the connecting rod; the present invention uses an actuator to apply force to the center of the back of the mirror, and the connecting rod provides feedback for the periphery of the back of the mirror. Directional force, so that the mirror surface produces a rotationally symmetrical elastic deformation, and the curvature error of the mirror surface is adjusted through the elastic deformation, so as to complete the confocal co-phase between the sub-mirrors.

Description

technical field [0001] The invention relates to the technical field of active optics, in particular to a device for adjusting the curvature error of a large-diameter splicing mirror and a method thereof. Background technique [0002] The spliced ​​mirror technology is a technology that decomposes a larger integral mirror into multiple sub-mirrors. When needed, the confocal and co-phase technology between the sub-mirrors is completed by means of active optics. It is an economical and effective technical means that the mirror is difficult to process and carry, and it is of great significance in the development of large-aperture optical systems. [0003] Since the sub-mirrors are processed in batches, the machining error causes a certain surface error between the sub-mirrors. Therefore, in the process of splicing the sub-mirrors, the active adjustment of the surface error is the key; the existing active adjustment It mainly focuses on the adjustment of the degree of freedom of...

AI Technical Summary

Problems solved by technology

[0003] Since the sub-mirrors are processed in batches, the processing error causes a certain surface error between the sub-mirrors. Therefore, in the splicing process of the sub-mirrors, the active adjustment of the surface error is the key; the existing active adjustment It mainly focuses on the degree of freedom adjustment of the mirror. This adjustment method has certain limitations because it does not directly adjust the surface shape of the mirror.

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