Turning mechanism for large-diameter main mirror

Abstract

The invention discloses a turning mechanism for a large-diameter main mirror. A hoisting beam assembly of the turning mechanism evenly disperses one-point hoisting concentrated force into two identical degrees of small dispersed hoisting force, and thus the whole turning mechanism is kept balanced. A frame assembly serves as a supporting framework of the whole turning structure, and round pieces at the bottom of the frame assembly are used for making contact with the ground in the turning process, so that a smooth turning process and small vibration are ensured, and extra stress is prevented from being introduced. Two axial supporting assemblies are placed on the back side and the front side of the main mirror correspondingly and used for unloading axial force of the main mirror, and three-point supporting force is dispersed into nine parts of dispersed supporting force according to the Whiffle-tree principle, so that uniform release of the supporting force is fully achieved, and it is ensured that risks caused by stress concentration of the back side and the front side of the main mirror are avoided. A radial supporting assembly makes full contact with half of the circumference of the main mirror through a large flexible steel sheet, local supporting force of the main mirror is reduced by enlarging the contact area, and thus the safety of the main mirror in the turning process is ensured.

Description

technical field [0001] The invention relates to the technical field of optical instruments, in particular to a large-caliber primary mirror turning mechanism. Background technique [0002] In the technical fields of space detection and astronomical observation, in order to improve the resolution, it is necessary to increase the aperture of the photoelectric detection equipment, resulting in a sharp increase in the size and weight of the primary mirror, and the cost is very expensive. [0003] Due to the fragility and fragility of the material of the primary mirror, certain risks are associated with its lifting, flipping, and transporting operations. Especially during the flipping process of the primary mirror, the axial support force and radial The supporting force changes, and the position of the primary mirror will shift along the direction of gravity, and there is a huge risk in the process. If the local stress is too large during the flipping process, the primary mirror...

AI Technical Summary

Problems solved by technology

[0002] In the technical fields of space detection and astronomical observation, in order to improve the resolution, it is necessary to increase the aperture of the photoelectric detection equipment, resulting in a sharp increase in the size and weight of the primary mirror, and the cost is very expensive

[0003] Due to the fragility and fragility of the material of the primary mirror, certain risks are associated with its lifting, flipping, and transporting operations. Especially during the flipping process of the primary mirror, the axial support force and radial The supporting force changes, and the position of the primary mirror will shift along the direction of gravity, and there is a huge risk in the process

If the local stress is too large during the flipping process, the primary mirror may be irreversibly damaged such as chipping, shattering, and fracture, which will bring a great delay to the development and service life of the entire photoelectric detection equipment and a sharp increase in cost

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