レーザ照射処理におけるカライドスコープによるエネルギー分布の変換 : 円管のカライドスコープ

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In C0_2 laser processing, laser beam is converted to have an adequate energy distribution for a processing purpose. This paper describes in both calculation and experiment what, energy distributions have been obtained by kaleidoscopes of cylindrical pipes. Calculated without respect to interference, the energy. distribution of a single-mode laser beam approaches that of a higher energy concentration on the center of kaleidoscope outlet as its length increases. The calculation with respect to interference indicated that interference fringes appear on energy distribution. Cylindrical pipes of which inner diameter is less than hundred times as large as laser wavelength can concentrate the energy on the center of the outlet by utilizing the influence of interference that depend on kaleidoscope length. The same kind of calculation was done for multi-mode laser beam. Calculated without respect to interference, the energy distribution which concentrates the energy on the center of kaleidoscope outlet. changes periodically as kaleidoscope length increases. The calculation with respect to interference had the same tendency as that for the single-mode. In experiment, acrylic burn patterns have been made by cylindrical kaleidoscopes of which inner diameters are both more and less hundred times than the laser wavelength in order to verify the conversion of single-mode beam. The experimental result has been in accordance with the calculation with regard to interference.
社団法人精密工学会の論文
1990-03-05

レーザ照射処理におけるカライドスコープによるエネルギー分布の変換 : 円管のカライドスコープ

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