Telescope, primary mirror assembly and primary mirror support mechanism with anti-rotation design

Abstract

The invention discloses a supporting mechanism for a main mirror of a telescope with an anti-rotation design. The outer spherical surface of the mandrel of the main mirror of the main mirror cooperates with the cylindrical surface of the middle hole of the main mirror of the telescope to limit the two-dimensional translation in the horizontal direction of the main mirror; three groups of bottom supports The component adopts a flexible structure to limit the vertical translation of the primary mirror and the two-dimensional tilt in the horizontal direction; an anti-rotation component is added to the support mechanism to limit the vertical rotation of the primary mirror, and the two sides of the anti-rotation flexible rod are fixed on the primary mirror support The base plate is flat, and the middle is bonded to the lower plane of the bottom support bonding seat through optical structural glue. The anti-rotation component has no direct contact with the primary mirror, which can reduce the influence of installation stress and adhesive stress on the surface shape of the primary mirror; the flexibility of the support mechanism Links can avoid mutual stress interference of each link. The supporting mechanism of the invention has correct principle, easy processing of mechanical parts and easy assembly, and is suitable for the main mirror supporting field of the reflective tracking and capturing telescope. The invention also discloses a telescope using the support mechanism and its main mirror assembly.

Description

technical field [0001] The invention relates to the technical field of optical instruments, in particular to a supporting mechanism for a main mirror of a telescope with an anti-rotation design. Background technique [0002] Reflective tracking and capturing telescope lenses, the clear aperture is generally 300mm ~ 600mm, in order to ensure a stable and clear observation image effect, the surface accuracy of the optical components inside the telescope plays a vital role, because the main mirror of the telescope is The largest optical component in the system, so its surface shape accuracy is the most important to the system imaging quality. A reasonable support structure will produce good surface shape accuracy, so it is necessary to carry out in-depth research on the support structure of the telescope's primary mirror. [0003] The main mirror of the traditional reflective telescope is supported by a separate mandrel. The mandrel is responsible for the radial positioning of...

AI Technical Summary

Problems solved by technology

[0003] The main mirror of the traditional reflective telescope is supported by a separate mandrel. The mandrel is responsible for the radial positioning of the main mirror. The friction force between the contact surface and the end surface of the primary mirror limits the axial rotation of the primary mirror. The advantage of this support method is that the structure is simple, but the disadvantage is that the pressing force of the upper and lower mechanical contact surfaces is not easy to control. The mirror shape is poor, and the pressing force is too small, which will lead to the axial rotation freedom of the primary mirror cannot be effectively restricted

[0004] Through the review of relevant literature, the most widely used primary mirror support method is the combined support scheme of three-point flexible bottom support and flexible side support. The degree of freedom is fully constrained, and the bottom support and side support can ensure no stress interference with each other through the flexible link. The disadvantage of this support scheme is that the structure is too complicated, which is not conducive to assembly, and the flexible hinge of the side support is generally complicated in structure and difficult to process. larger

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