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11. 发明专利

JPS5952890A Pulse gas laser device 失效
标题翻译：脉冲气体激光器件
公开(公告)号：JPS5952890A
公开(公告)日：1984-03-27
申请号：JP16237382
申请日：1982-09-20
申请人： Hitachi Ltd
发明人： KAWAKUBO YUKIO , SUGAWARA HIROYUKI , KUWABARA KOUJI , SHIROKURA TOSHIJI , OOHASHI TSUNEYOSHI
IPC分类号： H01S3/097 , H01S3/10
CPC分类号： H01S3/097
摘要： PURPOSE:To emit the pulse laser beams with large peak output without fail at high speed response producing a device suitable for pulse laser operation with a small pulse power supply by a method wherein a small series resistance is inserted in each discharge tube of a laser device. CONSTITUTION:Several discharge tubes 3 are filled with a gas medium e.g. CO2, Ne, He and the like and provided with an anode 11 and a cathode 12. The primary resistors ra-rd provided on the cathode side are series-connected to a power supply 2 comprising a DC bias power supply 4 and a pulse power supply 5. The secondary resistor RB is provided between the connecting point between the primary resistances ra-rd and the pulse power supply 5 and the bias power supply 4. With the value of the secondary resistance RB set up lower than that of the primary resistors ra-rd, the pulse current impressed with the pulse power supply 5, being interrupted by the secondary resistor RB, may flow mostly to each discharge tube 3 through the intermediary of the primary resistors without flowing to the bias power supply 4. Resultantly the pulse laser beams with large peak output may be emitted.
摘要翻译：目的：以高速响应发射具有大峰值输出的脉冲激光束，通过小型脉冲电源产生适合于脉冲激光操作的装置，其中在激光装置的每个放电管中插入小的串联电阻。构成：几个放电管3填充有气体介质，例如 CO 2，Ne，He等，并且设置有阳极11和阴极12.设置在阴极侧的主电阻器ra串联连接到包括DC偏置电源4和脉冲功率的电源2 次级电阻器RB设置在主电阻ra与脉冲电源5之间的连接点与偏置电源4之间。二次电阻RB的值设置为低于主电阻器如图所示，脉冲电源5施加的脉冲电流由次级电阻器RB中断，可以通过主电阻器的中间主要流到每个放电管3，而不流到偏置电源4.由此产生的脉冲可能会发出具有大峰值输出的激光束。

12. 发明专利

JPS58212189A Gas laser generator 失效
标题翻译：气体激光发生器
公开(公告)号：JPS58212189A
公开(公告)日：1983-12-09
申请号：JP9321182
申请日：1982-06-02
申请人： Hitachi Ltd
发明人： KAWAKUBO YUKIO , SUGAWARA HIROYUKI , KUWABARA KOUJI , SHIROKURA TOSHIJI , TAKEMORI SEI , SASAKI HIROHARU
IPC分类号： H01S3/038 , H01S3/097
CPC分类号： H01S3/097 , H01S3/0384 , H01S3/0385
摘要： PURPOSE:To operate both continuous oscillation and pulse oscillation in the same generator by setting the dicharging areas of a cathode for the continuous oscillation and a cathode for the pulse oscillation to S1>S2. CONSTITUTION:A gas laser generator 1 has an anode 3 and a plurality of continuous oscillation cathodes 4 (first cathodes) and pulse oscillation cathode 5 (second cathode) disposed in a discharge tube 2 having a reflecting mirror 2A and an output mirror 2B at both ends. The thickness t1 of the first cathode 4 is larger than the thickness t2 of the second cathode 5. In other words, t1>t2 is set. The structures of the cathodes 4, 5 is equal except the thickness. At the pulse oscillation time, the second switch 22 is, for example, closed, and the first and third switches 18, 23 are opened, and only the second cathode 5 is connected to the second power source 17 for the pulse oscillation. Thus, the discharging area S2 of the second cathode at the pulse oscillation time is set to the discharging area S2 adapted for the pulse oscillation smaller than the discharging area S1 by employing part of the cathode.
摘要翻译：目的：通过将用于连续振荡的阴极的扩大区域和用于脉冲振荡的阴极设置为S1> S2来操作同一发生器中的连续振荡和脉冲振荡。构成：气体激光发生器1具有阳极3和多个连续振荡阴极4（第一阴极）和脉冲振荡阴极5（第二阴极），脉冲振荡阴极5（第二阴极）设置在具有反射镜2A和输出反射镜2B的放电管2中结束。第一阴极4的厚度t1比第二阴极5的厚度t2大。换句话说，设定t1> t2。除了厚度之外，阴极4,5的结构相等。在脉冲振荡时间，第二开关22例如闭合，第一和第三开关18,23断开，仅第二阴极5连接到第二电源17用于脉冲振荡。因此，通过使用阴极的一部分，第二阴极的脉冲振荡时间的放电面积S2被设定为适合于小于放电区域S1的脉冲振荡的放电区域S2。

13. 发明专利

JPS58119485A NOZZLE FOR LASER WORKING 失效
公开(公告)号：JPS58119485A
公开(公告)日：1983-07-15
申请号：JP23382
申请日：1982-01-06
申请人： HITACHI LTD
发明人： SHIROKURA TOSHIJI , SUGAWARA HIROYUKI , KUWABARA KOUJI , SASAKI HIROHARU , TAKEMORI SEI , KAWAKUBO YUKIO
IPC分类号： B08B15/04 , B23K26/14
摘要： PURPOSE:To prevent inclusion of air into the work by providing an auxiliary flow passage through which a protecting gas passes near the end of a nozzle head on the side opposite from the work and expelling the air in the nozzle head by the negative pressure developed by the gaseous flow. CONSTITUTION:Laser light 2 is passed into the hole 2A of a nozzle head 6 and an auxiliary gas 7a is admitted through an aixiliary flow passage 7, and is blown to the surface of the work 4. In this stage, the flow of the gas 7 includes air therein and generates discoloration and welding defects in the work 4. Therefore, a gas flow passage 9 for flowing of a protecting gas 10 is mounted adjacently to the head 6, and the gas 10 is run so as to cross the laser light 2. Since the circumference of the gaseous flow is held under negative pressure, the air interposing in the head 6 is drifted toward the same and is discharged together with the gaseous flow to the outside. Thus the air is expelled from the surface of the work 4 and the surface is covered thoroughly with the gas 7b.

14. 发明专利

JPS5651885A LASER DEVICE 失效
公开(公告)号：JPS5651885A
公开(公告)日：1981-05-09
申请号：JP12793379
申请日：1979-10-05
申请人： HITACHI LTD
发明人： SHIROKURA TOSHIJI , SUGAWARA HIROYUKI , KUWABARA KOUJI , SASAKI HIROHARU , TAKEMORI SEI
IPC分类号： H01S3/03 , H01S3/02 , H01S3/036 , H01S3/08
摘要： PURPOSE:To stabilize a laser output by performing relative motion against a supporting frame or a stand for one of the plural retaining sections at least wherein the retaining sections are provided between the supporting frame for supporting a laser oscillator and the stand and the shift of a reflecting mirrow is eliminated. CONSTITUTION:Each laser oscillating tube 1 is composed of a junction tube 3, discharge tubes 4A and 4B locating at the both sides of the junction tube 3, and two discharge tube substances 2 composing of the end section junction tubes 5. One end of the above configuration is connected to a reflecting mirror 7 and a reflecting mirror 7 and an output mirror 8 are provided at the other end respectively. Next, the oscillating tube 1 is installed on a supporting frame 22 provided on a stand 21 through retaining sections 20. A DC power source 13 is connected to the oscillating tube 1 to emit laser light from the reflecting mirror 8. In this composition, the retaining sections 20 are permitted relative motion for the supporting frame 22 or the stand 21. In other words, a moving section 29 and a fixed section 30 are provided between the supporting frame 22 and the stand 21 and the reflecting mirror 8 is freely slided by a ball aligned between the moving section 29 and the fixed section 30. In this way, the shift of the central axis of the reflecting mirror 8 will extremely be minimized.

15. 发明专利

JPS5642392A DISCHARGE OF GAS LASER DEVICE 失效
公开(公告)号：JPS5642392A
公开(公告)日：1981-04-20
申请号：JP11795279
申请日：1979-09-17
申请人： HITACHI LTD
发明人： TAKEMORI SEI , SUGAWARA HIROYUKI , KUWABARA SHIYOUJI , SHIROKURA TOSHIJI , SASAKI HIROHARU
IPC分类号： H01S3/097 , H01S3/0977
摘要： PURPOSE:To contrive the high speed of discharging pulse glow and to reduce the withstand voltage of a switching circuit in the gas laser device by retaining continuous glow discharge with an electric input less than threshold and executing pulse glow discharge as superimposed with this glow discharge. CONSTITUTION:An anode 7, a cathode 8 and trigger electrode 10 are contained in a laser tube 1 filled with laser medium therein. A power supply circuit having a DC high voltage power supply 4, a switching circuit 5 and a discharge stabilizing ballast resistor 6 connected in series with each other is connected between the anode 7 and the cathode 8, the power supply 4 and the circuit 4 are operated, and a voltage is applied between the anode 7 and the cathode 8, and a glow discharge is generated between the cathode 8 and the electrode 10. Then, a glow discharge is generated between the anode 7 and the cathode 8 by the discharge trigger operation, the laser tube 1 is excited therein, and the laser light 11 is irradiated through a concave reflecting mirror 2 and a plane output mirror 3. The circuit 5 is operated in this operation, a pulse glow discharge 13 is executed as superimposed with the continuous glow discharge 12, and the withstand voltage of the circuit 5 is reduced.

16. 发明专利

JPS5640290A GAS LASER 失效
公开(公告)号：JPS5640290A
公开(公告)日：1981-04-16
申请号：JP11527079
申请日：1979-09-10
申请人： HITACHI LTD
发明人： TAKEMORI SEI , SUGAWARA HIROYUKI , KUWABARA KOUJI , SHIROKURA TOSHIJI , SASAKI HIROHARU
IPC分类号： H01S3/038 , H01S3/036 , H01S3/07 , H01S3/097
摘要： PURPOSE:To obtain a stable glow discharge even at a large discharge injection power by forming the discharging surface of the cathode of a gas laser tube by the inner surface of a cylinder almost coaxial with the laser tube axis, and prescribing the length of the discharge surface in the direction of the gas flow: 0.5-2.0mm.. CONSTITUTION:Two laser tubes 1 each having an anode 2 and cathode 3 are combined together on the cathode 3 side. One terminal of a high-voltage DC power source 5 is connected to the cathodes 3 through ballast resistors 4, and the other terminal earthed to the anodes 2. Moreover, a concave reflecting mirror 10 is provided at one end of the laser tubes 1, and a plane output mirror 11 at the other end. A mixture gas 14 of CO2, N2 and He is supplied for the laser tubes 1 by using a fan 13 to produce a plasma 9. Thus, a laser output light 12 is radiated from the output mirror 11 side. In the constitution, a discharging surface 7 of each cathode 3 is formed by the inner surface of a cylinder almost coaxial with the tube axis, and the length t of the discharging surface 7 in the direction of the gas flow is prescribed: 0.5-2.0mm.. Thus, the flow discharge is stabilized.

17. 发明专利

JPS55121691A GAS LASER DEVICE 失效
公开(公告)号：JPS55121691A
公开(公告)日：1980-09-18
申请号：JP2865679
申请日：1979-03-14
申请人： HITACHI LTD
发明人： SHIROKURA TOSHIJI , SUGAWARA HIROYUKI , KUWABARA KOUJI , SASAKI HIROHARU , TAKEMORI SEI
IPC分类号： H01S3/036 , H01S3/097
摘要： PURPOSE:To increase the output of a gas laser device by providing a rectifier in the vicinity of the inner wall of a discharge tube corresponding to an inlet to equalize the gas flow rate in the tube. CONSTITUTION:When gas medium 6 in a cooling passage 9 is flown from an inlet 10 into a discharge tube 2, it is branched into upper and lower sides 1A and 1B of the inner wall surface of the tube 2 corresponding to the inlet 10. Since the gas medium 6 flown into the upper side 1A is throttled at a projection 13 to become difficult to be flown to a rectifier 14, the gas stream becomes decelerated. Since the gas medium 6 flown into the lower side 1B, on the other hand, collides with the projection 13 and guided by the projection 13 to pass through the rectifier 12, the gas stream is accelerated. Thus, the gas stream is substantially equalized to cool the cathode 5 uniformly.

18. 发明专利

JPS5480099A LASER DEVICE 失效
公开(公告)号：JPS5480099A
公开(公告)日：1979-06-26
申请号：JP14713577
申请日：1977-12-09
申请人： HITACHI LTD
发明人： SUGAWARA HIROYUKI , KUWABARA SHIYOUJI , SHIROKURA TOSHIJI , SASAKI HIROHARU
IPC分类号： H01S3/097 , H01S3/0971 , H01S3/104
摘要： PURPOSE:To better the gas circulation without increasing the blower capacity and thus to increase the cooling efficiency by providing the switch which performs the control so that the other electrode may not discharge while one of the two electrodes discharges. CONSTITUTION:Discharge tube 1 and 2 discharge the laser beam generated through excitation of gas 13 filled inside, along with the discharge through electrode 6 and 7 provided at the both ends of the discharge tube. At the same time, cooling path 23 is provided to circulate gas 13 from part of the discharge tube in which both electrodes correspond to each other through the both ends of the discharge tube. Then a switch is provided to the electrode to give control so that the other electtrode may not discharge while one of the both electrodes is discharging. As a result, the gas circulation can be improved without increasing the capacity of blower 12, thus increasing the cooling efficiency.

19. 发明专利

JPH0437079A METAL VAPOR LASER LIGHT ATTENUATOR 失效
公开(公告)号：JPH0437079A
公开(公告)日：1992-02-07
申请号：JP14137690
申请日：1990-06-01
申请人： HITACHI LTD
发明人： TAKEHISA KIWAMU , SHIROKURA TOSHIJI , MIKI ATSUSHI
IPC分类号： G02B5/00 , H01S3/10
摘要： PURPOSE:To enable the laser output to be attenuated without changing the input power and the optical path of the laser beams by inserting a heat resistant porus plate into the optical path of oscillated laser beams. CONSTITUTION:In order to adjust the position and gradient of an output mirror 4, a cylindrical lens 8 and coloring matter cell 6 etc. to maximize the output of a coloring matter laser beams 9, a light attenuator 11 with metallic meshes 10a, 10b stretched thereon is inserted into oscillated laser beams so as to shield the dazzlement of the naturally emitted light from the laser beams 2 themselves and coloring matter solution 7. Next, the laser beams 2 are passed through the mesh 10a or 10b to attenuate the laser output. At this time, the attenuation level can be adjusted in two stages due to the difference in the mesh sizes. Through these procedures, the laser output can be temporarily attenuated neither adjusting a power supply nor changing the optical path of the laser beam at all.

20. 发明专利

JPH0437077A METAL VAPOR LASER DEVICE 失效
公开(公告)号：JPH0437077A
公开(公告)日：1992-02-07
申请号：JP14139390
申请日：1990-06-01
申请人： HITACHI LTD
发明人： WADA AKIRA , YAMAGUCHI MOTOO , SHIROKURA TOSHIJI , OHASHI TSUNEYOSHI , YOSHIKAWA TOSHIMITSU
IPC分类号： H01S3/03
摘要： PURPOSE:To avoid the permeation of the fine particles of a heat insulating material into a plasma discharge tube by a method wherein a heat resistant insulating guide and a heat resistant coil spring are arranged between a plasma discharge tube and an enclosure. CONSTITUTION:The title metallic vapor laser device is structured so that the end of a plasma discharge tube 1 and the end of an insulating guide 14 may be brought into pressure-contact with the coil compression spring 15 arranged on the other end of the insulating guide 14. In such a structure, the discharge between electrodes can be prevented from leaking out to the outer periphery of the plasma discharge tube 1 from the discharge starting time. Accordingly, the discharging energy between electrodes can be fully expended in exciting copper metallic particles required for raising the inner temperature of the plasma discharge pipe 1 and the laser oscillation to improve the efficiency simultaneously avoiding the permeation of the fine particles of a heat insulating material 5 into the plasma discharge tube 1 for reducing the stain in a window 12 and the unstable discharge phenomenon.

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