Precision micrometric displacement actuator used under polar region low-temperature environment

Abstract

The invention provides a precision micrometric displacement actuator used under a polar region low-temperature environment, and relates to the precision micrometric displacement actuator. The precision micrometric displacement actuator solves the problem a supporting and adjusting mechanism suitable for a large-scale segmented mirror telescope under the polar region low-temperature environment does not exist at present. A base plate is mounted in a shell, a rolling linear guide rail is mounted on the base plate, and a left end cap and a right end cap are arranged at the two ends of the shell in a covering mode respectively. A flexible shaft is mounted on a driving rod, a motor seat is mounted on the rolling linear guide rail, and a stepping motor is mounted on the motor seat. One end of a screw rod is connected with the stepping motor through an elastic coupler, a base is mounted on the base plate, and a sleeve is mounted in the base. A first nut is mounted at the left end of the driving rod, a second nut is mounted at the right end of the sleeve, and the other end of the screw rod is screwed on the second nut and the first nut. One end of the driving rod is inserted into the sleeve and is connected with the first nut, and the other end of the screw rod is connected with the flexible shaft. A shaft sleeve is arranged on the driving rod in a sleeved mode, and a pre-tightening spring is arranged on the driving rod in a sleeved mode and is compressed between the first nut and the shaft sleeve. The precision micrometric displacement actuator is used in the segmented mirror telescope.

Description

technical field

[0001] The invention relates to a precision micro-displacement actuator, in particular to a precision micro-displacement actuator used in a polar low-temperature environment, and belongs to the technical field of telescope splicing mirror active optics. Background technique

[0002] With the continuous development of modern astronomical technology, astronomers have put forward higher requirements for the light-gathering ability and spatial resolution of astronomical telescopes. The ability to collect light is reflected in the ability to find farther and fainter targets, and the spatial resolution is reflected in the ability to see details clearly. The spatial resolution of the telescope is the minimum distance that the system can distinguish. It is inversely proportional to the beam aperture of the objective lens. To improve the spatial resolution of the astronomical optical telescope, the aperture of the objective lens must be increased. At present, the dia...

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