한국레이저가공학회:학술대회논문집 (Proceedings of the Korean Society of Laser Processing Conference)

한국레이저가공학회 (Korean Society of Laser Processing)
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Fabrication of diffraction grating mold using dot pattern

  • 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 )) ;
  • Joung, Youn-Gun (IT Machinery Research Center Korea Institute of Machinery & Materials ( KIMM ))
  • 발행 : 2006.11.17
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초록

Diffraction grating is the optical device which has periodic pattern. Decorative logotypes is the one of application of diffraction grating. In this paper diffraction grating for decorative logotype is fabricated by dot pattern in stead of line pattern. 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 dot patterns. In order to minimize the dot diameter, 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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