Five-freedom-degree auxiliary lens adjusting mechanism of astronomical telescope working in extreme environment

Abstract

A five-freedom-degree auxiliary lens adjusting mechanism of an astronomical telescope working in an extreme environment is arranged between a telescope machine frame and an auxiliary lens of the telescope. The auxiliary lens adjusting mechanism is characterized by being provided with a five-dimensional parallel movement mechanism with three translation freedom degrees and two rotation freedom degrees and comprising a static platform, a dynamic platform, a first piezoelectric ceramic driving rod, a second piezoelectric ceramic driving rod, a third piezoelectric ceramic driving rod, a fourth piezoelectric ceramic driving rod and a fifth piezoelectric ceramic driving rod. The two ends of the five sets of piezoelectric ceramic driving rods are connected with the static platform and the dynamic platform respectively. Translation along a z axis and rotation around an x axis and a y axis can be generated through movement of the first piezoelectric ceramic driving rod, the second piezoelectric ceramic driving rod and the third piezoelectric ceramic driving rod, and translation along the x axis and the y axis can be generated through movement of the fourth piezoelectric ceramic driving rod and the fifth piezoelectric ceramic driving rod. The auxiliary lens adjusting mechanism can support work of the astronomical telescope working in the extreme environment and has the advantages that the driving mechanism is made of piezoelectric ceramics, so that the problem of a motor caused in the extreme environment is solved. No transmission mechanism is adopted in the whole set of mechanism, therefore, movement precision is improved, large lateral load can be borne, movement interference is eliminated, and control is convenient.

Description

technical field [0001] The invention belongs to the technical field of mechanical design and manufacture, and specifically relates to a five-degree-of-freedom astronomical telescope auxiliary mirror adjustment mechanism working in extreme environments, which is an adjustment mechanism for astronomical telescope auxiliary mirrors in extreme environments such as space telescopes and Antarctic telescopes. Background technique [0002] In a large-aperture optical telescope system, the relative position and attitude of the primary mirror and the secondary mirror (secondary mirror) have an important impact on high-quality imaging, but the mass and volume of the primary mirror of a large-aperture telescope are relatively large, so the The secondary mirror is designed as a multi-degree-of-freedom adjustable mechanism. At present, the Stewart six-bar mechanism is widely used in the auxiliary mirror adjustment mechanism of astronomical telescopes. The six-bar mechanism has a simple st...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a five-degree-of-freedom astronomical telescope auxiliary mirror adjustment mechanism that can work in extreme environments, which can solve the problems of the existing six-bar mechanism such as small side load, mutual interference between the bars, and difficult control.

Images