Nanoscale precise displacement actuator for large segmented mirror optical telescope

Abstract

The invention discloses a nanoscale precise displacement actuator for a large segmented mirror optical telescope. Weight of sub-mirrors and a telescope assembly acts on an output shaft of a compression spring mechanism. A voice coil motor is on the compression spring mechanism and is coaxial with the output shaft. A mechanism composed of a worm gear pair, a ball screw pair and a spline pair is setunder the compression spring mechanism and is taken as a length telescopic device. The compression spring mechanism, the voice coil motor are the length telescopic device are coaxial with the outputshaft. The problem that the cost is high due to the fact that according to the same kind of lever type nanoscale precise displacement actuators, the output shafts swing, many joints are employed, thenumber of levers is high and processing is complex can be avoided. The nanoscale precise displacement actuator is relatively simple in structure and relatively low in production cost. A requirement ofthe large segmented mirror optical telescope for a great number of actuators can be satisfied.

Description

technical field [0001] The invention relates to a nanoscale precision displacement actuator applied in the optical field, in particular to a nanoscale precision displacement actuator which needs to be used when splicing sub-mirrors in a large spliced ​​mirror optical telescope. Its outstanding feature is that the unloading mechanism, the voice coil motor and the output shaft are coaxial, which can avoid the high cost problems caused by the swinging of the output shaft of the similar lever-type nano-scale precision displacement actuator, many joints, a large number of levers, and complicated processing. Compared with the lever-type nanoscale precision displacement actuator, its structure is relatively simple, and the production cost is low, which can meet the requirements of a large number of actuators used in large-caliber spliced ​​mirror optical telescopes. Background technique [0002] The nanoscale precision displacement actuator is one of the key components necessary fo...

AI Technical Summary

Problems solved by technology

The feature of this scheme is that the output force can be amplified by the lever, the displacement resolution can also be subdivided according to the leverage ratio, and the gap between the lever joints can also be enlarged. For this reason, all 22 joints of this scheme are installed with flexible pivots to eliminate Joint empty back, the unit price of the flexible pivot is relatively high, and the processing cost of many rods is also high, the cost of the whole scheme is naturally relatively high, and the output shaft of this scheme will deflect slightly left and right with the up and down

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