Novel power-driven protective cover for primary mirror of large aperture telescope

Abstract

The invention discloses a novel power-driven protective cover for primary mirror of large aperture telescope, and belongs to the field of lens covering device installed on optical telescope. Aiming to solve the problems that the present protective cover has large wind resistance and poor operational stability, the protective cover of the invention is composed of four units, wherein each unit comprises a substrate, a cover plate, sealing strips, a linear actuator, an adjustable pull rod, a spherical headed joint, hinge struts and hinges. The sealing strips are arranged on linear edges of any two opposite covering plates, reinforcing ribs are riveted on the covering plates, the spherical headed joints are fixedly connected on vertical bars of the reinforcing ribs, the spherical headed joints are in connection with the adjustable pull rods, an ends of the hinge struts are fixedly connected on transverse bars of the reinforcing ribs, another ends of the hinge struts are connected with the hinges that are fixedly connected on the substrates, and the linear actuator is fixed on the substrates. The four covering plates rotate at 90 degrees, thereby positioning the four covering plates on a same plane and forming a round. According to the invention, the structure is simple, the weight is light, modular design is adopted by each unit, the interchangeability is strong, the assembly and disassembly operation are convenient, and the appearance is nice.

Description

technical field [0001] The invention relates to the technical field of a main mirror protective cover of a telescope, in particular to a main mirror protective cover device of an electric large-aperture telescope. Background technique [0002] With the continuous development of astronomical technology, astronomers urgently need large-aperture telescopes to observe stars and man-made aircraft in space. As the aperture of the telescope increases, the fine dust and particles suspended in the air will be more easily adsorbed on the mirror surface. As time goes by, the accumulation of dust will seriously reduce the reflectivity of the primary mirror and affect the observation ability of the telescope. During the assembly and future maintenance of large-aperture telescopes, people must be close to the primary mirror to disassemble and assemble the secondary mirror, adjust the on-board optical system, and perform other maintenance operations. A little carelessness may touch the sur...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems of the existing large-scale telescope protection cover, large opening wind resistance, and poor stability of the switch driving mode, the present invention provides a new type of electric large-diameter telescope main The mirror protection cover consists of four units, each unit includes: ribs, base plate, cover plate, sealing strip, linear drive, adjustable pull rod, ball joint, hinge rod and hinge, and the linear drive is composed of a stepper motor , hand wheel, coupling, screw pair, bearing housing, motor support, dovetail groove guide rail, slider, protective cover, cable connector, two photoelectric limit switches, two mechanical limit switches, tie rod connection seat , photoelectric limit switch trigger piece and mechanical limit switch trigger piece, the hand wheel is installed on the output shaft at the rear end of the stepper motor, the stepper motor is connected to the motor support and connected to the screw pair through a coupling, the bearing The seat is connected to the dovetail groove guide rail to support the screw pair, the slider is installed on the dovetail groove guide rail and connected to the screw pair, the tie rod connection seat is installed on the slider and connected with the adjustable pull rod, and the two photoelectric limit switches are installed on the dovetail On one side of the groove guide rail, two mechanical limit switches are installed on the other side of the dovetail groove guide rail. Keep the same plane as the mechanical limit switch on the slider, and the protective cover connects the dovetail guide rail and the motor support as a whole through screws

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