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A six-degree-of-freedom secondary mirror adjustment mechanism based on piezoelectric stacks

A technology of adjusting mechanism and degrees of freedom, applied in telescopes, optics, instruments, etc., can solve the problems of difficult to achieve high-precision positioning, fast active vibration isolation, low response frequency of continuous motion, etc., to eliminate motion gaps, eliminate mechanical friction, The effect of high movement precision

Inactive Publication Date: 2017-06-27
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the linear stepper motor is difficult to achieve continuous motion and its response frequency is low, it is difficult for the secondary mirror adjustment mechanism based on the linear stepper motor to achieve high-precision positioning and fast active vibration isolation.

Method used

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  • A six-degree-of-freedom secondary mirror adjustment mechanism based on piezoelectric stacks
  • A six-degree-of-freedom secondary mirror adjustment mechanism based on piezoelectric stacks
  • A six-degree-of-freedom secondary mirror adjustment mechanism based on piezoelectric stacks

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Embodiment Construction

[0028] The present invention provides a six-degree-of-freedom secondary mirror adjustment mechanism based on piezoelectric stacks, as shown in the attached figure 1 As shown, it includes a bottom plate 1, an adjustment unit 2 and a top platform 3 for placing the secondary mirror; the adjustment unit 2 is arranged between the bottom plate 1 and the top platform 3, and is characterized in that:

[0029] Specifically, the adjustment unit 2 includes a first composite flexible hinge 21, a lever amplifying device 22, a fixed frame 23, a straight beam flexible hinge 24, a piezoelectric stack 25 and a second composite flexible hinge 26;

[0030] One end of the first composite flexible hinge 21 is connected with the top platform 3, and the other end is connected with the lever amplifying device 22; the lever amplifying device 22 is connected with the fixed frame 23 through a straight beam type flexible hinge 24; the piezoelectric stack 25 is fixedly installed on Inside the fixed frame ...

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Abstract

The invention belongs to the field of coaxial reflecting telescope regulating mechanisms and particularly relates to a six-degree-of-freedom secondary mirror regulating mechanism based on stacked piezoelectric blocks. The mechanism comprises a bottom plate, regulating units and a top platform used for carrying a secondary mirror, wherein the regulating units are arranged between the bottom plate and the top platform. The mechanism is characterized in that each regulating unit comprises a first combined flexible hinge, a lever amplifying device, a fixed frame, straight beam type flexible hinges, one stacked piezoelectric block and a second combined flexible hinge, wherein one end of the first combined flexible hinge is connected with the top platform, and the other end of the first combined flexible hinge is connected with the lever amplifying device; the lever amplifying device is connected with the fixed frame through the straight beam type flexible hinges; the stacked piezoelectric block is fixedly mounted in the fixed frame; one end of the second combined flexible hinge is connected with the fixed frame, and the other end of the second combined flexible hinge is connected with the bottom plate. By the adoption of the mechanism, the purposes of high-precision positioning of the secondary mirror and quick and active vibration isolation can be achieved.

Description

technical field [0001] The invention belongs to the field of a coaxial reflective telescope adjustment mechanism, and relates to a secondary mirror adjustment mechanism, in particular to a six-degree-of-freedom secondary mirror adjustment mechanism based on a piezoelectric stack. Background technique [0002] The secondary mirror adjustment mechanism is an important part of the coaxial reflective telescope system. The high sensitivity and quick response of the secondary mirror adjustment is an effective guarantee for the imaging quality of the telescope system. As the power source of the regulating mechanism, the motion accuracy and response frequency of the actuator (motor) have an important influence on the overall performance of the regulating mechanism. When the telescope is in an unknown environment, the fast response of the adjustment mechanism is required to reduce the influence of external random vibration on the telescope imaging. [0003] At present, most people u...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B23/00G02B23/16
CPCG02B23/00G02B23/16
Inventor 李创周楠
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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