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Method for splicing large area holograne gratings seamlessly

A holographic grating and seamless splicing technology, which is applied in the field of preparation of holographic optical elements, can solve problems such as limitations in engineering practicability, difficulty in grating stability, and impact on engineering use

Inactive Publication Date: 2010-12-29
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these mechanical structures are difficult to ensure the stability of the grating for a long time after splicing, and the engineering practicability is limited; influences

Method used

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  • Method for splicing large area holograne gratings seamlessly
  • Method for splicing large area holograne gratings seamlessly
  • Method for splicing large area holograne gratings seamlessly

Examples

Experimental program
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Embodiment 1

[0022] Embodiment 1: A preparation method for seamlessly splicing large-area holographic gratings, comprising the following steps:

[0023] (1) In the holographic interference recording light field, respectively expose and develop two holographic dry plates to obtain the first reference grating and the second reference grating; figure 2 The light path shown;

[0024] (2) See attached figure 1 As shown, the first reference grating 1 is placed in the middle of the front of the main holographic dry plate to be fabricated with a large-area holographic grating, the second reference grating 2 is placed outside one side of the main holographic dry plate, and the first and second The second reference grating and the main holographic dry plate are fixed on the movable exposure support platform, the part of the main holographic dry plate far away from the second reference grating is defined as the left half of the main holographic dry plate 3, and the part close to the second referenc...

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Abstract

The invention discloses a method for splicing large area holograne gratings seamlessly, which utilizes the optical character of a first reference grating in an interference record optical field to detect the phase and the inclination between the interference record optical field and a recorded main grating part in real time and utilizes a second reference grating to detect the position of the main grating in real time so as to seamlessly splice the gratings accurately. The invention creatively provides the technical scheme of arranging two reference gratings, realizes the adjustment of a leftside and a right side by the first reference grating and solves the influence caused by removing the first reference grating by the second reference grating, thereby the large area holograne gratingsare spliced seamlessly and the requirements of isometry and grazing precision of diffraction grating lines are met.

Description

technical field [0001] The invention relates to a method for preparing a holographic optical element, in particular to a method for preparing a seamless splicing of a large-area holographic grating. Background technique [0002] Large-area equidistant one-dimensional diffraction gratings are the key components of many large-scale high-tech engineering projects. At present, in the laser confinement nuclear fusion system, the equidistant and flatness precision of the one-dimensional diffraction grating lines is extremely high. Holographic technology is a very important technical means to manufacture large-aperture diffraction gratings, and the aperture of diffraction gratings is limited by the aperture of the holographic recording optical system. In order to manufacture a holographic grating with an ultra-large aperture, splicing multiple gratings is an effective way to realize it. [0003] In the prior art, splicing of large-area holographic gratings can be divided into two...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B5/18
Inventor 李朝明吴建宏陈新荣胡祖元
Owner SUZHOU UNIV