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Method and system for detecting adjacent splicing mirrors

A detection method and prism technology, which is applied in the field of optics, can solve the problems of difficult splicing and alignment of splicing mirrors, and achieve the effects of convenient disassembly and maintenance, strong feasibility, and simple structure

Active Publication Date: 2021-05-18
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

[0005] Embodiments of the present invention provide a method and system for detecting adjacent splicing mirrors, so as to at least solve the technical problem of difficult splicing alignment of existing splicing mirrors

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  • Method and system for detecting adjacent splicing mirrors
  • Method and system for detecting adjacent splicing mirrors

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Embodiment 1

[0041] According to an embodiment of the present invention, a method for detecting adjacent spliced ​​mirrors is provided, which is suitable for confocal / co-phase spliced ​​mirrors, see figure 1 , including the following steps:

[0042] S101: Divide the coherent light source into two parallel beams with a preset optical path difference;

[0043] S102: two beams of parallel light beams are respectively incident on two adjacent splicing mirrors for reflection;

[0044] S104: Interfering the reflected two beams of parallel light beams to generate interference fringes;

[0045] S106: Deduce the parameter information between two adjacent splicing mirrors from the interference fringe information.

[0046] In the method for detecting adjacent splicing mirrors in the embodiment of the present invention, the parameter information between two adjacent splicing mirrors is calculated from the interference fringe information, and the parameter information between two adjacent splicing mi...

Embodiment 2

[0055] According to another embodiment of the present invention, see Figure 4 , provides an adjacent stitching mirror detection system, comprising:

[0056] Laser 1, used to generate a coherent light source;

[0057] The beam splitter is used to split the coherent light source into two parallel beams with a preset optical path difference and incident them on two adjacent splicing mirrors for reflection;

[0058] The beam interferometer is used to interfere the reflected two beams of parallel beams to generate interference fringes;

[0059] The parameter calculation unit is used to calculate the parameter information between two adjacent splicing mirrors from the interference fringe information.

[0060] As a preferred technical solution, the beam splitter includes: a right-angled triangular prism 3, a parallelogram prism 5, the right-angled triangular prism 3 is glued to the parallelogram prism 5 whose angle is complementary to it, and the glued layer 4 realizes semi-transm...

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Abstract

The present invention relates to the field of optics, in particular to a method and system for detecting adjacent splicing mirrors. In the method and system, a coherent light source is divided into two parallel beams with a preset optical path difference; Reflection is performed on two adjacent splicing mirrors; interference fringes are generated by interfering the reflected two parallel beams; parameter information between two adjacent splicing mirrors is calculated from the information of the interference fringes. Compared with the existing edge sensor detection method, the present invention has higher precision, is convenient for disassembly and maintenance and is not affected by factors such as ambient temperature, humidity, dust, etc., and is easy to operate during the assembly and adjustment process, solving the problem of the traditional edge sensor. Difficulties affected by environmental temperature, humidity, dust and other factors are suitable for splicing telescope mirrors that require high-precision confocal conphase alignment. It has a simple structure, strong feasibility, convenient installation, and has the function of unit integration.

Description

technical field [0001] The invention relates to the field of optics, in particular to a method and system for detecting adjacent splicing mirrors. Background technique [0002] In the application of deep space exploration, in order to observe more distant and fainter targets, the aperture of the telescope needs to be continuously upgraded. However, due to factors such as processing and manufacturing, design risks, transportation and adjustment, the aperture of the telescope cannot be infinitely increased. At present, the diameter of the largest single telescope in the world is about 8.4m. The optical system of a telescope with a larger diameter can only be realized by splicing sub-mirrors. For example, telescopes such as Keck and HET that have been built and TMT, E-ELT, and JWST that are currently under construction are all in the form of spliced ​​mirrors. [0003] The main feature of the spliced ​​mirrors of the spliced ​​telescope is that each spliced ​​mirror has three ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B11/24
CPCG01B11/2441
Inventor 安其昌曹海峰杨飞张景旭
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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