Flexible displacement actuator for spliced mirror surface of large optical infrared telescope

A technology of infrared telescopes and actuators, which is applied in the field of large optical telescopes, can solve problems such as the inability to meet the requirements for the use of very large aperture telescopes, and achieve the effects of simple structure, high acceleration response, and long service life

Pending Publication Date: 2021-11-23
NANJING INST OF ASTRONOMICAL OPTICS & TECH NAT ASTRONOMICAL OBSE
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Problems solved by technology

China has also designed and tested micro-displacement actuators used in spliced ​​mirror telescopes, and achieved certain results, but it still cannot meet the corresponding use requirements of very large aperture telescopes.

Method used

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  • Flexible displacement actuator for spliced mirror surface of large optical infrared telescope

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Embodiment Construction

[0021] In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not intended to limit the present application.

[0022] In order to achieve nanometer positioning accuracy in the presence of interference, the flexible displacement actuator of the splicing mirror of the large-scale optical infrared telescope of the present invention adopts a two-stage design of rotational symmetry and series stacking, which combines the coarse adjustment function (long stroke) and the fine adjustment function. Adjustment function (short stroke).

[0023] Such as figure 1 As shown, the flexible displacement actuator includes guide pin 1, lifting output cylinder 2, voice coil motor 3, folding leaf sprin...

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Abstract

The invention provides a flexible displacement actuator for a spliced mirror surface of a large optical infrared telescope. The flexible displacement actuator comprises a guide pin, a lifting output cylinder, a voice coil motor, a folding plate spring, a sliding bearing, a compression spring, a deep groove ball bearing, an encoder reading head, a scale plate, a nut rotation type ball screw, a transition sleeve, an inner side fixing cylinder, a meshing straight tooth cylindrical gear, a stainless steel anti-backlash spur gear, a direct current motor and an outer side fixing cylinder. The nut rotation type ball screw, the transition sleeve, the inner side fixing cylinder, the meshing straight tooth cylindrical gear, the stainless steel anti-backlash spur gear and the direct current motor form a coarse-level control part, and the guide pin, the lifting output cylinder and the voice coil motor form a fine-level control part. The two-stage design concept is adopted, and the precision and positioning requirements can be met.

Description

technical field [0001] The invention relates to a large optical telescope, in particular to a flexible displacement actuator for splicing mirrors of a large optical infrared telescope. Background technique [0002] The micro-displacement actuator is a key component of the splicing mirror support system of a large optical telescope, which plays a role in supporting and adjusting the posture of the sub-mirror. Each sub-mirror is equipped with three actuators to realize the adjustment of three out-of-plane degrees of freedom (tip, tilt and piston). The actuator controls each sub-mirror to be arranged in a specified position according to the design requirements through high-precision elongation or shortening, thereby realizing the confocal and common phase of each sub-mirror. [0003] When splicing the primary mirror to achieve a larger caliber, it also faces huge challenges. In order to make the spliced ​​primary mirror meet the optical design requirements, it is necessary to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B7/00
CPCG02B7/00
Inventor 胡守伟张勇王跃飞刘成超
Owner NANJING INST OF ASTRONOMICAL OPTICS & TECH NAT ASTRONOMICAL OBSE
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