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High-stability grating splicing five-dimensional adjusting mechanism

A five-dimensional adjustment, high stability technology, applied in optics, optical components, installation and other directions, can solve problems such as the inability to maintain long-term stability

Active Publication Date: 2021-05-11
NANJING INST OF ASTRONOMICAL OPTICS & TECH NAT ASTRONOMICAL OBSE
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The adjustment and locking of the existing optical precision adjustment mechanism are independent of each other, which will cause slight changes in the adjustment mechanism during the locking process, and the loosening of the adjustment mechanism or the locking mechanism will cause adjustment misalignment, so that it cannot maintain long-term stability sex

Method used

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  • High-stability grating splicing five-dimensional adjusting mechanism
  • High-stability grating splicing five-dimensional adjusting mechanism
  • High-stability grating splicing five-dimensional adjusting mechanism

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Embodiment Construction

[0033] Specific embodiments of the present invention will be further described in detail according to the accompanying drawings.

[0034] This embodiment provides a figure 1 The shown double grating stitching five-dimensional stable fine-tuning mechanism. The double grating splicing five-dimensional stable fine-tuning mechanism includes a spliced ​​grating unit 2, a base 1, a base plate 3, a stable fine-tuning self-locking mechanism 4, a stable fine-tuning mechanism 5, a slidable ball hinge fine-tuning mechanism 6, and a spring pretensioning component. In this embodiment, the base 1 and the substrate 3 are vertically distributed as a fixed reference for grating splicing.

[0035] In the process of grating splicing, in order to ensure the coplanarity of the two spliced ​​gratings and the parallelism and full periodicity of the grating grooves, it is necessary to adjust the five-dimensional degrees of freedom of the spliced ​​grating units, respectively degrees of freedom of ...

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Abstract

The invention discloses a high-stability grating splicing five-dimensional adjusting mechanism, which comprises a base, a grating splicing unit, a substrate, stable fine adjustment self-locking mechanisms, a spring pre-tightening component, a stable fine adjustment mechanism and a slidable spherical hinge fine adjustment mechanism, wherein the stable fine adjustment mechanism and the slidable spherical hinge fine adjustment mechanism are arranged at the bottom of the grating splicing unit, the three stable fine adjustment self-locking mechanisms are distributed at the back of the grating splicing unit in an isosceles triangle shape, and the stable fine adjustment mechanism, the slidable spherical hinge fine adjustment mechanism and the stable fine adjustment self-locking mechanisms are jointly used for five-dimensional adjustment decoupling. According to the invention, pre-tightening force is applied to the grating unit and the adjusting mechanism through the spring to complete five-dimensional stable fine adjustment of the grating unit, it is guaranteed that fixing of the grating unit does not generate over-constraint through the flexibility of the extension spring and the slidable spherical hinge mechanism, and interference does not occur in the multi-dimensional adjusting process of the grating unit.

Description

technical field [0001] The invention belongs to the field of adjustment and installation of optical precision instruments, and in particular relates to a grating splicing five-dimensional stable fine-tuning mechanism. Background technique [0002] In the field of astronomical technology, gratings are the most commonly used dispersion elements in optical precision instruments such as spectrometers. As the size of astronomical optical telescopes and spectrometers increases, the size of echelle gratings can reach 1200mm×300mm, which cannot be achieved by direct manufacturing of existing gratings. 1 meter level, so mechanical splicing is used to achieve the application size. For the mechanical splicing grating mechanism, it is required that the adjustment error range of the grating unit in the six degrees of freedom during the splicing adjustment is at the sub-micron level and sub-micro-radian level, and it puts forward higher requirements for the short-term stability and even t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B7/00
CPCG02B7/00
Inventor 陈忆新其其格王磊韩建张凯朱永田
Owner NANJING INST OF ASTRONOMICAL OPTICS & TECH NAT ASTRONOMICAL OBSE
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