| 摘要 |
PURPOSE:To make it possible to manufacture the discharge orifice of an ink jet head economically and with high accuracy by forming the discharge orifice using the fourth harmonic of a YAG laser and setting the YAG laser to a single mode by Q switch pulse oscillation. CONSTITUTION:The second harmonic of a YAG laser extracted from a YAG laser oscillator 1 is converted to the fourth harmonic (wavelength: 266m) of the YAG laser by allowing the second harmonic to pass through a photocrystal 5b again. Further, the harmonic is allowed to infiltrate a beam expander 7 so as to reduce the size of the beam on a work, and then is emitted to a work 10 fixed to the surface of an NC table 11 through a mirror 8 and a lens 9. The photocrystals 5a, 5b are called 'non-linear photocrystal'. In addition, to abrade a polymer material, the oscillation mode of the YAG laser used is set to a single mode by Q switch pulse oscillation. It is possible to fabricate the ink discharge orifice of the ink jet head with high accuracy by using the fourth harmonic of the YAG laser. |
