Proceedings of the Korean Society of Precision Engineering Conference (한국정밀공학회:학술대회논문집)

  • 2006.05a
  • /
  • Pages.487-488
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  • 2006
  • /
  • 2005-8446(pISSN)
Korean Society for Precision Engineering (한국정밀공학회)
권호 표지

Practical application of picosecond laser micro-machining to the direct fabrication of a diffraction grating mold

피코초 레이저를 이용한 회절 격자 금형 개발

  • Noh Ji-Whan (IT Machinery Research Center Korea Institute of Machinery & Materials ( KIMM )) ;
  • Lee Jae-Hoon (IT Machinery Research Center Korea Institute of Machinery & Materials ( KIMM )) ;
  • Sohn Hyon-Kee (IT Machinery Research Center Korea Institute of Machinery & Materials ( KIMM )) ;
  • Suh Jeong (IT Machinery Research Center Korea Institute of Machinery & Materials ( KIMM )) ;
  • Shin Dong-Sig (IT Machinery Research Center Korea Institute of Machinery & Materials ( KIMM ))
  • Published : 2006.05.01
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Abstract

Picosecond (ps) laser micro-machining has emerged as an attractive method of fabricating high-precision microstructures, especially in metals. In this paper, a metallic mold for diffraction gratings is fabricated with a mode-locked 12 Ps $Nd:YVO_4$ laser. Laser pulses with a wavelength of 355nm are irradiated on the surface of NOK 80, a mold material, to generate line patterns. In order to minimize the line width, laser power is set just above the ablation threshold of NOK 80. Results show that the spectrum from the fabricated mold is good enough for some industrial application.

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