A grating splicing device

Abstract

The invention discloses a grating splicing device, which includes a base body and at least two gratings to be spliced. Several first fastening mechanisms for fixing the grating to the base body are arranged between the base body and the gratings. A grindable adjustment mechanism is also provided between the base body and the grating. The above-mentioned grating splicing device reduces splicing errors by grinding to achieve high-precision splicing of gratings. While satisfying the splicing quality, it has a simple structure and is easy to manufacture, which is conducive to the long-term stability of grating splicing quality and has high precision and high stability of grating splicing. sexual characteristics.

Description

technical field [0001] The invention relates to the technical field of diffraction gratings, in particular to a grating splicing device. Background technique [0002] Diffraction grating is a kind of optical element with nanometer precision, which is the core component of spectroscopic instruments, and is widely used in astronomy, national defense, industry, agriculture and other fields. The concept of grating splicing was first proposed from the spectroscopic instruments of large astronomical telescopes. In order to improve the light-gathering ability and resolving power of astronomical telescope systems, meter-level gratings are needed for spectral analysis; in addition, with the continuous development of laser inertial confinement fusion research To develop, large-size planar diffraction gratings become the key to increasing the output laser pulse energy, and it is necessary to solve the production problems of large-size gratings, such as grating splicing technology. [...

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Problems solved by technology

[0003] The existing production methods of spliced ​​gratings mainly include two types: one is spliced ​​gratings including mechanical adjustment devices, application number: CN201610541867.7, "an array type grating splicing adjustment device driven by macro-micro combination", which requires precise The mechanical adjustment device can obtain high-quality spliced ​​grating, but the whole device has many parts and complex structure, which is not conducive to the long-term stability of the grating splicing quality. The deformation caused by the different temperature changes of the adjustment device and the grating blank will affect the grating. Stitching quality; Another method is to make large-area spliced ​​gratings by splicing and duplication methods, application number: CN201510190510.4, "Copying and splicing method for large-scale planar diffraction gratings", which is conducive to long-term storage of gratings, but grating duplication and curing The process will cause deformation of the grating substrate, which is not conducive to the production of high-quality spliced ​​gratings

[0004] Therefore, how to provide a grating splicing device that solves the problem that the existing spliced ​​gratings cannot take into account both the splicing quality of the grating and the long-term stability of the grating is a technical problem urgently needed by those skilled in the art.

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