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Sawtooth diaphragm, application of the sawtooth diaphragm and method for debugging light path of sawtooth diaphragm

A sawtooth and diaphragm technology, applied in the optical field, can solve the problems of difficult to observe the boundary point, low debugging efficiency, small repetition frequency laser, etc., to achieve the effect of easy observation, measurement and optical path adjustment, high debugging efficiency, and time saving.

Active Publication Date: 2021-08-17
LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the super-Gaussian distribution of the edge of the infrared laser beam and the small repetition frequency laser energy, it is difficult to observe and judge the exact dividing point of the beam during actual operation, resulting in the need for repeated adjustments and checks, which is time-consuming and laborious
In addition, this method verifies the light adjustment effect of the beam through the development of the official launch site drawings, which is costly, and the laser device needs to be cooled for more than 3 hours after each official launch (Wonterghem, B.M.V., et al., Operations on the National Ignition Facility.FUSION SCIENCE ANDTECHNOLOGY, 2016.69:p.452-469), it will take more than 1 day to develop the official launch site drawings several times, and the debugging efficiency is low

Method used

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  • Sawtooth diaphragm, application of the sawtooth diaphragm and method for debugging light path of sawtooth diaphragm
  • Sawtooth diaphragm, application of the sawtooth diaphragm and method for debugging light path of sawtooth diaphragm
  • Sawtooth diaphragm, application of the sawtooth diaphragm and method for debugging light path of sawtooth diaphragm

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Embodiment 1

[0044] Such as figure 1 with figure 2 As shown, a sawtooth diaphragm has a circular sawtooth structure 1, a first circular sawtooth structure 2 and a second circular sawtooth structure 3 sequentially etched on the optical plane from the inside to the outside, and the circular sawtooth structure 1 is located at the center of the optical plane. center, and the first annular sawtooth structure 2 and the second annular sawtooth structure 3 take the center of the optical plane as the center, the surrounding area of ​​the circular sawtooth structure 1, the first annular sawtooth structure 2 and the second annular sawtooth structure 3 The surrounding areas of are all light-transmitting areas, and all areas in the optical plane except the light-transmitting areas are light-opaque areas 4 . Preferably, the light-transmitting area is coated with an anti-reflection film to improve the light-transmitting effect, and the opaque area 4 is coated with a gold film to increase the laser dama...

Embodiment 2

[0056] The same part of this embodiment and Embodiment 1 will not be described again, the difference is:

[0057] Such as Figure 1 to Figure 3 As shown, the circumference of the circular sawtooth structure 1 is 26 times the width of the sawtooth, and the overall magnification of the laser device is 8.48 times. Processing technology, the diameter of the circular sawtooth structure 1 is 1.6 mm.

[0058] The first annular sawtooth structure 2, the second annular sawtooth structure 3, and the standard aperture 7 are all 12-order super-Gaussian distributions, and the softening factor is about 7.3%. The side length of the second annular sawtooth structure 3 and the standard aperture 7 is 48mm, and the side length of the first annular sawtooth structure 2 is 43mm. In order to make the convolution effect in the y direction significantly smaller than that in the x direction, the sawtooth width w of the circular sawtooth structure 1 , the first circular sawtooth structure 2 , and the...

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Abstract

The invention relates to a sawtooth diaphragm, application of the sawtooth diaphragm and a method for debugging a light path of the sawtooth diaphragm, and belongs to the technical field of optics. A circular sawtooth structure, a first annular sawtooth structure and a second annular sawtooth structure are sequentially etched on the optical plane of the sawtooth diaphragm from inside to outside. A first annular sawtooth structure and a second annular sawtooth structure are adopted to represent the near-field edge position of a laser beam, an image with a clear and bright edge annular band and a bright center position is formed in the near field of the laser beam, the image is obviously compared with a light-proof area, observation measurement and light path adjustment are facilitated, meanwhile, formal reflection field drawing development and repeated verification are not needed, the time is saved, and the debugging efficiency is high, simple and convenient.

Description

technical field [0001] The invention belongs to the technical field of optics, and in particular relates to a sawtooth diaphragm and its application and a debugging method for an optical path. Background technique [0002] Large-aperture and high-power laser devices can create unprecedented extreme physical conditions such as strong electric fields, strong magnetic fields, and high pressures in the laboratory environment. substitute role. With the continuous progress of precision physical experiments, higher energy and higher power requirements are put forward for large-aperture high-power devices. For this reason, more large-aperture optical components need to be installed. For example, the US National Ignition Device needs to complete 7348 optical components. Installation and debugging (Baisden, P.A., et al., Large Optics for the National Ignition Facility. FUSION SCIENCE AND TECHNOLOGY, 2016.69: p.295-351). The production, processing, and testing processes of large-aper...

Claims

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Application Information

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IPC IPC(8): G02B5/00G02B7/00
CPCG02B5/005G02B7/00
Inventor 李森宗兆玉赵军普梁樾熊迁龙蛟柴向旭薛峤张晓璐吴振海张君陈波郑奎兴郑万国
Owner LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS
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