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An online rapid measurement device and method for large-aperture grating damage

A large-aperture grating and measuring device technology, which is applied in the direction of measuring devices, optical instrument testing, and machine/structural component testing, can solve time-consuming problems and achieve high sensitivity, fast measurement speed, and optimized design.

Active Publication Date: 2018-12-07
中国工程物理研究院上海激光等离子体研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This measurement method takes a long time, and it takes tens of minutes to measure the damage state of a meter-level grating

Method used

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  • An online rapid measurement device and method for large-aperture grating damage
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  • An online rapid measurement device and method for large-aperture grating damage

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Embodiment 1

[0033] Such as figure 1 , Figure 2a with Figure 2b As shown, the online rapid measurement device for large-aperture grating damage of this embodiment includes a laser 1, a collimator lens 2, a half-wave plate 3, a polarization beam splitter 4, a first lens 5, a second lens 6, and a large Aperture grating 7, imaging system 8, data processing system 9,

[0034] The linearly polarized light beam emitted by the laser 1 is collimated by the collimator lens 2 into a parallel light beam. After passing through the half-wave plate 3, the parallel light beam passes through the polarization beam splitter 4 with high transmittance, and after passing through the polarization beam splitter 4 The transmitted light beam passes through the beam expansion system formed by the first lens 5 and the second lens 6 in turn to expand the beam diameter. The expanded beam is incident on the large-aperture grating 7 at the Littrow angle. The diffracted light will return along the original path, pass thr...

Embodiment 2

[0045] Such as figure 1 As shown, the online rapid measurement device for large-aperture grating damage of this embodiment includes a laser 1, a collimator lens 2, a half-wave plate 3, a polarization beam splitter 4, a first lens 5, a second lens 6, and a large Aperture grating 7, imaging system 8, data processing system 9,

[0046] The linearly polarized light beam emitted by the laser 1 is collimated by the collimator lens 2 into a parallel light beam. After passing through the half-wave plate 3, the parallel light beam passes through the polarization beam splitter 4 with high transmittance, and after passing through the polarization beam splitter 4 The transmitted light beam passes through the beam expansion system formed by the first lens 5 and the second lens 6 in turn to expand the beam diameter. The expanded beam is incident on the large-aperture grating 7 at the Littrow angle. The diffracted light will return along the original path, pass through the second lens 6 and the...

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Abstract

The invention discloses an on-line fast measuring device and measuring method of large aperture grating damage. The device comprises a laser, a collimating lens, a half wavelength plate, a polarization beam splitter, a first lens, a second lens, a large aperture grating, an imaging system and a data processing system, a polarized beam sent by the laser is collimated into parallel beams through the collimating lens, the parallel beams pass through the half wavelength plate and go through the polarization beam splitter with high transmittance, transmitted beams going through the polarization beam splitter go through beam expanding systems formed by the first lens and the second lens and expand the aperture of the beam, the expanded beams enters the large aperture grating, diffracted light of the large aperture grating enters the polarization beam splitter along an original path, reflected light of the polarization beam splitter is received by the imaging system, the imaging system is connected to the data processing system, an image obtained by the imaging system is analyzed and processed by the data processing system, and thus damage information of the large aperture grating is obtained. According to the on-line fast measuring device and measuring method of the large aperture grating damage, on-line fast measurement on the large aperture grating damage can be achieved.

Description

Technical field [0001] The invention belongs to the field of high-power lasers, in particular to an online rapid measurement device and method for large-aperture grating damage in a chirped pulse amplification system or an optical parameter chirped pulse amplification system. Background technique [0002] The ultra-short and ultra-strong laser system is currently a hot spot in the field of high-power laser research in the world, and is favored by the majority of scientific researchers. Ultra-short and ultra-strong laser systems can be used to study physical phenomena under various extreme conditions, such as high energy density physics, strong field physics, astrophysics, etc. International ultra-short and ultra-strong laser devices include: the advanced perspective light source device of Lawrence Livermore National Laboratory (LLNL) in the United States, the FIREX device of the Institute of Laser Engineering (ILE) of Osaka University in Japan, and the Laboratory for Laser Energe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M11/02
CPCG01M11/0278
Inventor 崔勇季来林单炯高妍琦王韬饶大幸杜鹏远曹兆栋李小莉陈明夏兰徐光
Owner 中国工程物理研究院上海激光等离子体研究所
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