Nanoscale precise displacement actuator for large segmented mirror optical telescope

A technology of large splicing and precision displacement, applied in optics, optical components, instruments, etc., can solve the problems of high cost, high unit price of flexible pivot, high processing cost, etc., achieve natural price, save purchase cost, save The effect of removing the milling processing fee

Active Publication Date: 2019-08-16
NANJING INST OF ASTRONOMICAL OPTICS & TECH NAT ASTRONOMICAL OBSE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • Nanoscale precise displacement actuator for large segmented mirror optical telescope
  • Nanoscale precise displacement actuator for large segmented mirror optical telescope
  • Nanoscale precise displacement actuator for large segmented mirror optical telescope

Examples

Experimental program
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Effect test

Embodiment 1

[0021] Embodiment 1, with reference to image 3 , the precision displacement actuator is driven by the motor to rotate the worm 24, the worm drives the worm wheel 25 to rotate, the worm wheel is fixed on the rotating nut 23 of the ball screw pair, the upper and lower ends of the rotating nut 23 are supported by bearings, and a set of back-to-back centripetal Thrust bearing 16, one side of the bearing outer ring is positioned on the shaft shoulder of the worm gear casing 17, the other side of the bearing outer ring is positioned and fixed by the outer ring compression nut 18, and the bearing inner ring side is close to the shaft shoulder of the rotating nut 23, The inner ring compression nut 19 is screwed on the external thread at the tail of the rotating nut 23, and is close to the inner ring of the bearing. By adjusting the tightening degree of the inner ring compression nut 19, the clearance between the two bearing rolling elements is eliminated, and the rotation nut 23 is c...

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PUM

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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...

Claims

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Application Information

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IPC IPC(8): G02B7/183F16H25/22
CPCG02B7/183F16H25/2204F16H2025/2084F16H2025/209
Inventor 周国华
Owner NANJING INST OF ASTRONOMICAL OPTICS & TECH NAT ASTRONOMICAL OBSE
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