1.
    发明专利
    未知

    公开(公告)号:DE102005055421B4

    公开(公告)日:2008-07-17

    申请号:DE102005055421

    申请日:2005-11-21

    Abstract: Ultrashort pulse laser processing bores, welds or cuts objects (work pieces) by converging ultrashort laser pulses by a lens on the objects (work pieces) positioned at the focus and heating small spots or narrow lines on the objects (work pieces). Shortage of a focal depth of the lens prevents the ultrashort pulse laser processing from positioning the object (a work piece) and forming a deep, constant-diameter cylindrical hole. Z-parameter is defined to be Z=2fc&Dgr;t/&Dgr;i2, where &Dgr;t is a FWHM pulse width of the ultrashort pulse laser, &Dgr;i is a FWHM beam diameter of the ultrashort pulse, f is a focal length of the lens and c is the light velocity in vacuum. Selection of an optical system including a diffraction-type lens which gives the Z-parameter less than 1 (Z

    2.
    发明专利
    未知

    公开(公告)号:DE102005055421A1

    公开(公告)日:2006-05-24

    申请号:DE102005055421

    申请日:2005-11-21

    Abstract: Ultrashort pulse laser processing bores, welds or cuts objects (work pieces) by converging ultrashort laser pulses by a lens on the objects (work pieces) positioned at the focus and heating small spots or narrow lines on the objects (work pieces). Shortage of a focal depth of the lens prevents the ultrashort pulse laser processing from positioning the object (a work piece) and forming a deep, constant-diameter cylindrical hole. Z-parameter is defined to be Z=2fc&Dgr;t/&Dgr;i2, where &Dgr;t is a FWHM pulse width of the ultrashort pulse laser, &Dgr;i is a FWHM beam diameter of the ultrashort pulse, f is a focal length of the lens and c is the light velocity in vacuum. Selection of an optical system including a diffraction-type lens which gives the Z-parameter less than 1 (Z

    Laser processing method and laser processing apparatus

    公开(公告)号:GB2420306B

    公开(公告)日:2010-02-03

    申请号:GB0523099

    申请日:2005-11-11

    Abstract: Ultrashort pulse laser processing bores, welds or cuts objects (work pieces) by converging ultrashort laser pulses by a lens on the objects (work pieces) positioned at the focus and heating small spots or narrow lines on the objects (work pieces). Shortage of a focal depth of the lens prevents the ultrashort pulse laser processing from positioning the object (a work piece) and forming a deep, constant-diameter cylindrical hole. Z-parameter is defined to be Z=2fc&Dgr;t/&Dgr;i2, where &Dgr;t is a FWHM pulse width of the ultrashort pulse laser, &Dgr;i is a FWHM beam diameter of the ultrashort pulse, f is a focal length of the lens and c is the light velocity in vacuum. Selection of an optical system including a diffraction-type lens which gives the Z-parameter less than 1 (Z

    Laser processing method and laser processing apparatus

    公开(公告)号:GB2420306A

    公开(公告)日:2006-05-24

    申请号:GB0523099

    申请日:2005-11-11

    Abstract: Ultrashort pulse laser processing bores, welds or cuts objects (work pieces) by converging ultrashort laser pulses by a lens on the objects (work pieces) positioned at the focus and heating small spots or narrow lines on the objects (work pieces). Shortage of a focal depth of the lens prevents the ultrashort pulse laser processing from positioning the object (a work piece) and forming a deep, constant-diameter cylindrical hole. Z-parameter is defined to be Z = 2fc Š t/ Š i , where Š t is a FWHM pulse width of the ultrashort pulse laser, Š i is a FWHM beam diameter of the ultrashort pulse, f is a focal length of the lens and c is the light velocity in vacuum. Selection of an optical system including a diffraction-type lens which gives the Z-parameter less than 1 (Z

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