公开(公告)号：US07436872B2

公开(公告)日：2008-10-14

申请号：US11467029

申请日：2006-08-24

申请人： Akira Egawa ,  Minoru Ando ,  Hajime Ikemoto

发明人： Akira Egawa ,  Minoru Ando ,  Hajime Ikemoto

IPC分类号： H01S3/22 ,  H01S3/00 ,  H01S3/097

CPC分类号： H01S3/097 ,  H01S3/036 ,  H01S3/073 ,  H01S3/10069 ,  H01S3/134

摘要： A high-frequency discharge excited gas laser oscillator receiving power from a laser power supply controlled by a pulse command, the high-frequency discharge excited gas laser oscillator provided with a power detecting section for detecting supply power from the laser power supply to a discharge tube and a pulse command control section positioned at an upstream side of the laser power supply, comparing an allowable upper limit value of supply power found from a relationship between a discharge tube temperature and supply power and an actual supply power detected by the power detecting section, stopping the pulse command value to the discharge tube when the supply power is higher than the allowable upper limit value, and setting a pulse command value based on the allowable upper limit value.

摘要翻译： 一种高频放电激励气体激光振荡器，其从由脉冲命令控制的激光电源接收电力，所述高频放电激励气体激光振荡器设置有用于检测从激光电源向放电管供电的功率检测部 以及脉冲指令控制部，其位于所述激光电源的上游侧，将从放电管温度和供给电力之间的关系求出的供给电力的容许上限值与由所述功率检测部检测出的实际供给电力进行比较， 当供电功率高于允许上限值时，将放电管的脉冲指令值停止，并根据容许上限值设定脉冲指令值。

公开(公告)号：US07586969B2

公开(公告)日：2009-09-08

申请号：US12000267

申请日：2007-12-11

申请人： Akira Egawa ,  Minoru Ando ,  Hajime Ikemoto

发明人： Akira Egawa ,  Minoru Ando ,  Hajime Ikemoto

IPC分类号： H01S3/03

CPC分类号： H01S3/104 ,  H01S3/036 ,  H01S3/09702 ,  H01S3/09705 ,  H01S3/10069 ,  H01S3/134

摘要： A discharge excitation type gas laser oscillator has a discharge excitation unit for exciting a laser gas by discharge in a discharge tube to generate induced emission of laser light, a high-frequency power supply unit for supplying power to the discharge tube, and a controller unit for controlling output current of the high-frequency power supply unit. The laser oscillator further has an output detecting section that detects actual current value of the high-frequency power supply unit supplying power to the discharge tube at an arbitrary pressure lower than the high pressure during the steady-state operation, at the start of the laser oscillator, after the laser gas begins discharge excitation at a pressure lower than the high pressure during steady-state operation, an output comparison section that compares the detected actual current value with a normal current value that has been detected when the gas composition of the laser gas is normal at the same pressure as the actual current value is detected; and a power supply control section that discriminates, if the difference between the actual current value and the normal current value is equal to or greater than a preset value, that the gas composition of the laser gas is abnormal, and stops output of the high-frequency power supply unit.

摘要翻译： 放电励磁型气体激光振荡器具有放电激励单元，用于通过放电管中的放电来激发激光气体以产生激光的感应发射，用于向放电管供电的高频电源单元和控制器单元 用于控制高频电源单元的输出电流。 激光振荡器还具有输出检测部，其在稳态操作期间，在激光开始时，以低于高压的任意压力，检测向放电管供电的高频电源单元的实际电流值 振荡器，在激光气体在稳态运行期间在低于高压的压力下开始放电激励之后，输出比较部分将检测到的实际电流值与当激光的气体组成检测到的正常电流值进行比较 在与检测到实际电流值相同的压力下，气体正常; 以及电源控制部，其将实际电流值与正常电流值的差等于或大于预设值，判断为激光气体的气体成分异常， 高频电源单元。

公开(公告)号：US20080144681A1

公开(公告)日：2008-06-19

申请号：US12000267

申请日：2007-12-11

申请人： Akira Egawa ,  Minoru Ando ,  Hajime Ikemoto

发明人： Akira Egawa ,  Minoru Ando ,  Hajime Ikemoto

IPC分类号： H01S3/00

CPC分类号： H01S3/104 ,  H01S3/036 ,  H01S3/09702 ,  H01S3/09705 ,  H01S3/10069 ,  H01S3/134

摘要： A discharge excitation type gas laser oscillator has a discharge excitation unit for exciting a laser gas by discharge in a discharge tube to generate induced emission of laser light, a high-frequency power supply unit for supplying power to the discharge tube, and a controller unit for controlling output current of the high-frequency power supply unit. The laser oscillator further has an output detecting section that detects actual current value of the high-frequency power supply unit supplying power to the discharge tube at an arbitrary pressure lower than the high pressure during the steady-state operation, at the start of the laser oscillator, after the laser gas begins discharge excitation at a pressure lower than the high pressure during steady-state operation, an output comparison section that compares the detected actual current value with a normal current value that has been detected when the gas composition of the laser gas is normal at the same pressure as the actual current value is detected; and a power supply control section that discriminates, if the difference between the actual current value and the normal current value is equal to or greater than a preset value, that the gas composition of the laser gas is abnormal, and stops output of the high-frequency power supply unit.

摘要翻译： 放电励磁型气体激光振荡器具有放电激励单元，用于通过放电管中的放电来激发激光气体以产生激光的感应发射，用于向放电管供电的高频电源单元和控制器单元 用于控制高频电源单元的输出电流。 激光振荡器还具有输出检测部，其在稳态操作期间，在激光开始时，以低于高压的任意压力，检测向放电管供电的高频电源单元的实际电流值 振荡器，在激光气体在稳态运行期间在低于高压的压力下开始放电激励之后，输出比较部分将检测到的实际电流值与当激光的气体组成检测到的正常电流值进行比较 在与检测到实际电流值相同的压力下，气体正常; 以及电源控制部，其将实际电流值与正常电流值的差等于或大于预设值，判断为激光气体的气体成分异常， 高频电源单元。

公开(公告)号：US07348517B2

公开(公告)日：2008-03-25

申请号：US11197259

申请日：2005-08-05

申请人： Akira Egawa ,  Minoru Ando ,  Atsushi Mori

发明人： Akira Egawa ,  Minoru Ando ,  Atsushi Mori

IPC分类号： B23K26/06 ,  B23K26/38

CPC分类号： B23K26/38 ,  B23K26/06 ,  B23K26/0643 ,  B23K26/0648 ,  B23K26/0665 ,  B23K26/14

摘要： A laser cutting apparatus capable of properly cutting a workpiece having a large thickness with a laser beam. The laser cutting apparatus includes a gas laser oscillator; and an optical system including a collective lens and transmitting and collecting a laser beam generated in the gas laser oscillator to irradiate a workpiece with the laser beam. An index M2 for evaluating a beam quality of the laser beam emerging from the optical system, with which the workpiece is irradiated, is in a range of 2.8 to 4.5; while the index M2 is defined by a formula: M2=π×(dm)2/(4×λ×Zr); in which λ is a wavelength of the laser beam; dm is a minimum beam diameter of the laser beam in a predetermined optical-path range including a focal point of the collective lens; and Zr is a distance between a first position on an optical axis, at which the minimum beam diameter dm is established, and a second position on the optical axis, at which a beam diameter “21/2×dm” is established, in the laser beam in the predetermined optical-path range.

摘要翻译： 一种能够用激光束适当地切割厚度大的工件的激光切割装置。 激光切割装置包括气体激光振荡器; 以及包括集体透镜的光学系统，并且传送和收集在气体激光振荡器中产生的激光束以用激光束照射工件。 用于评估从工件被照射的光学系统出射的激光束的光束质量的指标M 2在2.8至4.5的范围内; 而索引M 2由下式定义：M 2 = pix（dm）2 /（4xlambdaxZr）; 其中λ是激光束的波长; dm是包括集体透镜的焦点的预定光路范围内的激光束的最小光束直径; 并且Zr是在建立最小光束直径dm的光轴上的第一位置与光轴上的光束直径“2”1/2“之间的距离， xdm“在预定光路范围内的激光束中建立。

公开(公告)号：US20070047610A1

公开(公告)日：2007-03-01

申请号：US11467029

申请日：2006-08-24

申请人： Akira Egawa ,  Minoru Ando ,  Hajime Ikemoto

发明人： Akira Egawa ,  Minoru Ando ,  Hajime Ikemoto

IPC分类号： H01S3/04 ,  H01S3/22

CPC分类号： H01S3/097 ,  H01S3/036 ,  H01S3/073 ,  H01S3/10069 ,  H01S3/134

摘要： A high-frequency discharge excited gas laser oscillator receiving power from a laser power supply controlled by a pulse command, the high-frequency discharge excited gas laser oscillator provided with a power detecting section for detecting supply power from the laser power supply to a discharge tube and a pulse command control section positioned at an upstream side of the laser power supply, comparing an allowable upper limit value of supply power found from a relationship between a discharge tube temperature and supply power and an actual supply power detected by the power detecting section, stopping the pulse command value to the discharge tube when the supply power is higher than the allowable upper limit value, and setting a pulse command value based on the allowable upper limit value.

摘要翻译： 一种高频放电激励气体激光振荡器，其从由脉冲命令控制的激光电源接收电力，所述高频放电激励气体激光振荡器设置有用于检测从激光电源向放电管供电的功率检测部 以及脉冲指令控制部，其位于所述激光电源的上游侧，将从放电管温度和供给电力之间的关系求出的供给电力的容许上限值与由所述功率检测部检测出的实际供给电力进行比较， 当供电功率高于允许上限值时，将放电管的脉冲指令值停止，并根据容许上限值设定脉冲指令值。

公开(公告)号：US07154925B2

公开(公告)日：2006-12-26

申请号：US10765877

申请日：2004-01-29

申请人： Akira Egawa ,  Minoru Ando

发明人： Akira Egawa ,  Minoru Ando

IPC分类号： H01S3/00

CPC分类号： H01S3/0326 ,  H01S3/036 ,  H01S3/0384 ,  H01S3/041 ,  H01S3/073 ,  H01S3/08045 ,  H01S3/104 ,  H01S2301/20

摘要： A gas laser oscillator of easy maintenance which is capable of switching a beam mode at high speed. Electric discharge sections in which gas medium is flown are formed in an optical resonating space in an electric discharge tube between a rear mirror and an output mirror. Electrodes are connected to electric discharge power sources (alternating current or direct current power sources). Coils are wound around the electric discharge tube at the respective electric discharge sections and excited by coil excitation circuits. Directions and intensities of the excitation currents from the coil excitation circuits are controlled by a controller. Regions in which the electric discharge currents flow between the electrodes in the respective electric discharge sections are varied by magnetic fields generated by the coils in accordance with the directions and intensities of the excitation currents of the coils, to thereby control the beam mode.

摘要翻译： 一种易于维护的气体激光振荡器，能够高速切换光束模式。 在后反射镜和输出镜之间的放电管的光学谐振空间中形成有气体介质流动的放电部。 电极连接到放电电源（交流电或直流电源）。 线圈在各个放电部分缠绕在放电管周围并被线圈激励电路激励。 来自线圈励磁电路的励磁电流的方向和强度由控制器控制。 放电电流在各个放电部分的电极之间流动的区域根据线圈产生的磁场根据线圈的激励电流的方向和强度而变化，从而控制射束模式。

公开(公告)号：US20060280213A1

公开(公告)日：2006-12-14

申请号：US11443276

申请日：2006-05-31

申请人： Akira Egawa ,  Minoru Ando ,  Eiji Kobayashi ,  Takeshi Watanabe

发明人： Akira Egawa ,  Minoru Ando ,  Eiji Kobayashi ,  Takeshi Watanabe

IPC分类号： H01S3/00 ,  H01S3/22 ,  H01S3/223

CPC分类号： H01S3/073 ,  H01S3/036 ,  H01S3/09702 ,  H01S3/0971 ,  H01S3/10038 ,  H01S3/104

摘要： Provided is a laser oscillator (2) including: a first electrode pair (7a); a second electrode pair (7b); a discharge power supply (4) that induces pulse discharge in the first and second electrode pairs (7a, 7b); and at least one of a discharge phase control unit (53) which extends control so that a first discharge phase (X1) to be attained in the first electrode pair (7a) and a second discharge phase (X2) to be attained in the second electrode pair (7b) will be different from each other during the pulse discharge induced by the discharge power supply (4), a duty cycle control unit (53) which extends control so that a first duty cycle (Y1) to be attained in the first electrode pair (7a) and a second duty cycle (Y2) to be attained in the second electrode pair (7b) will be different from each other during the pulse discharge, a pulse frequency control unit (53) which extends control so that a first pulse frequency (Z1) to be attained in the first electrode pair (7a) and a second pulse frequency (Z2) to be attained in the second electrode pair (7b) will be different from each other during the pulse discharge. Consequently, while discharges in the discharge electrodes are stabilized, laser output can be quickly controlled.

摘要翻译： 提供了一种激光振荡器（2），包括：第一电极对（7a）; 第二电极对（7b）; 在第一和第二电极对（7a，7b）中引起脉冲放电的放电电源（4）; 以及放电相位控制单元（53）中的至少一个，其延伸控制使得要在第一电极对（7a）中达到的第一放电阶段（X 1）和第二放电阶段（X 2）达到 在由放电电源（4）引起的脉冲放电期间，第二电极对（7b）中的第二电极对（7b）将彼此不同，占空比控制单元（53）的延伸控制使得第一占空比（Y 1） 在第一电极对（7a）中达到的第二电极对（7b）中的第二占空比（Y 2）将在脉冲放电期间彼此不同，脉冲频率控制单元 53），其延伸控制使得在第一电极对（7a）中要获得的第一脉冲频率（Z 1）和在第二电极对（7b）中达到的第二脉冲频率（Z 2）将是 在脉冲放电期间彼此不同。 因此，在放电电极放电稳定的同时，能够快速地控制激光输出。

公开(公告)号：US07149237B2

公开(公告)日：2006-12-12

申请号：US10372168

申请日：2003-02-25

申请人： Akira Egawa ,  Minoru Ando ,  Takeshi Watanabe

发明人： Akira Egawa ,  Minoru Ando ,  Takeshi Watanabe

IPC分类号： H01S3/22

CPC分类号： H01S3/0346 ,  H01S3/03 ,  H01S3/034 ,  H01S3/036

摘要： A laser oscillator capable of preventing contamination of optical components by organic matter such as oil mist. Gas laser medium in an optical resonator constituted by optical components is pumped by an electric discharge generated in an electric discharge tube to produce a laser beam. The gas medium flows at high speed in the electric discharge tube incorporated in a circulating path including a blower. A part of lubrication oil of the blower is evaporated and mixed into the gas medium. Since the optical components are cooled by retaining mechanisms to prevent temperature rise of the components and a gas stagnation occurs between the optical component and the electric discharge tube, the evaporated oil mist tends to be congealed and adhered to a surface of the optical component. A photocatalyst arranged in the vicinity of the optical component effectively decomposes and removes the oil mist.

摘要翻译： 能够防止由油雾等有机物质污染光学部件的激光振荡器。 由光学部件构成的光谐振器中的气体激光介质通过在放电管中产生的放电而被泵浦，以产生激光束。 气体介质在包括鼓风机的循环路径中的放电管中高速流动。 将鼓风机的一部分润滑油蒸发并混合到气体介质中。 由于光学部件被保持机构冷却以防止部件温度升高，并且在光学部件和放电管之间发生气体滞留，所以蒸发的油雾倾向于凝结并粘附到光学部件的表面。 布置在光学部件附近的光催化剂有效地分解并除去油雾。

公开(公告)号：US20060114959A1

公开(公告)日：2006-06-01

申请号：US11285284

申请日：2005-11-23

申请人： Akira Egawa ,  Minoru Ando ,  Atsushi Mori

发明人： Akira Egawa ,  Minoru Ando ,  Atsushi Mori

IPC分类号： H01S3/03

CPC分类号： H01S3/09705 ,  H01S3/036 ,  H01S3/073

摘要： A gas laser oscillator (10) provided with voltage detecting means (4a to 4d) for detecting the voltage of each of a plurality of discharge tube segments (6a to 6d) of a discharge tube before start of discharge and a discharge tube segment start judging means (1) for judging if each of the plurality of discharge tube segments (6a to 6d) has started based on the voltage of the discharge tube segments (6a to 6d) detected by the voltage detecting means (4a to 4d), wherein the discharge tube segment start judging means (1) allows all of the plurality of discharge tube segments (6a to 6d) to start only when the voltages of all of the discharge tube segments (6a to 6d) of the plurality of discharge tube segments are smaller than a predetermined voltage (Vb) is provided. Due to this, it is possible to judge an abnormality in the laser gas before the start of discharge without any work on the part of the operator and thereby prevent the discharge tube from being damaged.

摘要翻译： 一种气体激光振荡器（10），其设置有用于检测在放电开始和放电之前放电管的多个放电管段（6a至6d）中的每一个的电压的电压检测装置（4a至4d） 管段开始判断装置（1），用于基于由电压检测装置检测的放电管段（6a至6d）的电压来判断多个放电管段（6a至6d）中的每一个是否已经开始 （4a至4d），其中放电管段开始判断装置（1）允许所有多个放电管段（6a至6d）中的所有放电管段（6a至6d）的所有放电管段 一个至6d）的多个放电管段都小于预定电压（Vb）。 由此，可以在开始放电之前判断激光气体在操作者的任何工作中的异常，从而防止放电管的损坏。

公开(公告)号：US20060044981A1

公开(公告)日：2006-03-02

申请号：US11197259

申请日：2005-08-05

申请人： Akira Egawa ,  Minoru Ando ,  Atsushi Mori

发明人： Akira Egawa ,  Minoru Ando ,  Atsushi Mori

IPC分类号： G11B7/00

CPC分类号： B23K26/38 ,  B23K26/06 ,  B23K26/0643 ,  B23K26/0648 ,  B23K26/0665 ,  B23K26/14

摘要： A laser cutting apparatus capable of properly cutting a workpiece having a large thickness with a laser beam. The laser cutting apparatus includes a gas laser oscillator; and an optical system including a collective lens and transmitting and collecting a laser beam generated in the gas laser oscillator to irradiate a workpiece with the laser beam. An index M2 for evaluating a beam quality of the laser beam emerging from the optical system, with which the workpiece is irradiated, is in a range of 2.8 to 4.5; while the index M2 is defined by a formula: M2=π×(dm)2/(4×λ×Zr); in which λ is a wavelength of the laser beam; dm is a minimum beam diameter of the laser beam in a predetermined optical-path range including a focal point of the collective lens; and Zr is a distance between a first position on an optical axis, at which the minimum beam diameter dm is established, and a second position on the optical axis, at which a beam diameter “21/2×dm” is established, in the laser beam in the predetermined optical-path range.

摘要翻译： 一种能够用激光束适当地切割厚度大的工件的激光切割装置。 激光切割装置包括气体激光振荡器; 以及包括集体透镜的光学系统，并且传送和收集在气体激光振荡器中产生的激光束以用激光束照射工件。 用于评估从工件被照射的光学系统出射的激光束的光束质量的指标M 2在2.8至4.5的范围内; 而索引M 2由下式定义：M 2 = pix（dm）2 /（4xlambdaxZr）; 其中λ是激光束的波长; dm是包括集体透镜的焦点的预定光路范围内的激光束的最小光束直径; 并且Zr是在建立最小光束直径dm的光轴上的第一位置与光轴上的光束直径“2”1/2“之间的距离， xdm“在预定光路范围内的激光束中建立。