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DONG Ze-jun, YANG Hao-dong, ZHU Zhi-wu. Research of laser-focusing method while measuring the damage threshold on optical material surface[J]. LASER TECHNOLOGY, 2013, 37(5): 668-671. DOI: 10.7510/jgjs.issn.1001-3806.2013.05.023
Citation: DONG Ze-jun, YANG Hao-dong, ZHU Zhi-wu. Research of laser-focusing method while measuring the damage threshold on optical material surface[J]. LASER TECHNOLOGY, 2013, 37(5): 668-671. DOI: 10.7510/jgjs.issn.1001-3806.2013.05.023

Research of laser-focusing method while measuring the damage threshold on optical material surface

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  • Received Date: December 30, 2012
  • Revised Date: February 28, 2013
  • Published Date: September 24, 2013
  • A new laser focusing method was proposed to reduce the nonlinear optical effect for the measurement of damage threshold on optical material surfaces. The focus is located by utilizing the plasma beam as the reference object which is emitted by the air ionization. In the focusing process, an image is formed by a plasma luminous point which is formed by the air ionization. Based on the mirror image principle, the sample surface is in the middle of the luminous point and the image, the focusing process is completed when the luminous point and the image coincide. In conclusion, the method is simple operation and high precision, it is important to the measurement of damage threshold on optical material surfaces.
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