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1. 发明专利

JPS6015528A MEASUREMENT OF LASER BEAM CHARACTERISTICS 失效
公开(公告)号：JPS6015528A
公开(公告)日：1985-01-26
申请号：JP12330683
申请日：1983-07-08
申请人： HITACHI LTD
发明人： OOHASHI TSUNEYOSHI , KUWABARA KOUJI , KAWAKUBO YUKIO , SUGAWARA HIROYUKI , SHIROKURA TOSHIJI , TAKEMORI SEI , WADA AKIRA , SASAKI HIROHARU , YANO MAKOTO
IPC分类号： G01J1/02 , G01J1/42 , H01S3/00
摘要： PURPOSE:To measure the intensity and intensity distribution of a laser beam from a laser generator by using scattered lights thereof with an output mirror of a laser resonator or those with an optical element provided on a laser beam transmission path. CONSTITUTION:A reflector 3 used as an optical element is ground sufficiently looks plane macroscopically but is rugged microscopically. Therefore, most of a laser beam 2 incident into the reflector 3 is reflected and gives a laser beam 13 having the power and the intensity distribution almost equal to the beam 2 while a part theeof turns to a scattered light 12, the intensity of which is determined by the microscopic ruggedness of the reflector 3 and the intensity of the beam and the microscopic ruggedness is distributed uniform viewed macroscopically. With such an arrangement, the intensity distribution of the scattered light 12 almost corresponds to the intensity distribution of the beam 2 while the intensity thereof is proportional to the intensity of the beam 2. So, a signal proportional to the intensity of the beam 2 can be obtained by measuring the scattered light 12 with a detector 16 thereby enabling the measurement of the laser power while work is being processed.

2. 发明专利

JPS5982184A LASER BEAM MACHINE 失效
公开(公告)号：JPS5982184A
公开(公告)日：1984-05-12
申请号：JP19239982
申请日：1982-11-04
申请人： HITACHI LTD
发明人： SASAKI HIROHARU , KUWABARA KOUJI , SHIROKURA TOSHIJI
IPC分类号： B23K26/00 , B23K26/42
摘要： PURPOSE:To provide a laser beam machine which enables the early detection of the crack in a condenser lens by making the light from another light source except lase light for incident to the condenser lens for processing, condensing said light and measuring an intensity distribution. CONSTITUTION:Light 7 emitted from a light source 3, separately from passages 1, 12 for laser light, is made incident to a condenser lens 10. The transmitted light 14 through the lens 10 reflects on a reflection mirror 18, is focused by an optical fiber bundle 15 and is fed to an optical signal processing unit. The signal processing unit detects the scattering and the abnormality in the light distribution owing to the cracking of the lens 10 or the dust sticking thereto and emits a stop command to a laser generator or processing device. Since the abnormality in the lens can be treated while it is minor, the safe operation is assured. The condition of the lens 10 can be monitored with an alarm device for the abnormality of the condenser lens.

3. 发明专利

JPS5979122A Laser power measuring device 失效
标题翻译：激光功率测量装置
公开(公告)号：JPS5979122A
公开(公告)日：1984-05-08
申请号：JP18755682
申请日：1982-10-27
申请人： Hitachi Ltd
发明人： KUWABARA KOUJI , SUGAWARA HIROYUKI , SHIROKURA TOSHIJI , KAWAKUBO YUKIO , TAKEMORI SEI , SASAKI HIROHARU , OOHASHI TSUNEYOSHI
IPC分类号： G01J1/02 , B23K26/00 , G01J1/42
CPC分类号： G01J1/4257
摘要： PURPOSE:To measure the laser power even in the working state of an object to be worked, by providing a photodetector, which detects the scattered light from a reflective mirror, near the optical path of a laser light. CONSTITUTION:A laser light 10 emitted from a laser light generator 1 is reflected on the surface of a reflective mirror 7 and is condensed onto an object 9 to be worked through a condenser lens 8. A scattered light 12 from the reflective mirror 7 is detected by a photodetector 13, and the output is inputted to a power meter 14, and the power of the laser light during working is measured.
摘要翻译：目的：即使在被加工物的工作状态下，也可以通过在激光的光路附近设置检测来自反射镜的散射光的光检测器来测量激光功率。构成：从激光发生器1发射的激光10在反射镜7的表面上被反射，并被聚光到被加工物体9上，通过聚光透镜8被检测。来自反射镜7的散射光12被检测通过光电检测器13输出，并输出到功率计14，并测量加工时的激光功率。

4. 发明专利

JPS5968983A Laser generator 失效
标题翻译：激光发生器
公开(公告)号：JPS5968983A
公开(公告)日：1984-04-19
申请号：JP17832182
申请日：1982-10-13
申请人： Hitachi Ltd
发明人： KUWABARA KOUJI , SUGAWARA HIROYUKI , SHIROKURA TOSHIHARU , KAWAKUBO YUKIO , TAKEMORI SEI
IPC分类号： H01S3/081 , H01S3/22 , H01S3/23
CPC分类号： H01S3/076
摘要： PURPOSE:To enable to obtain a laser beam of less slippage of focus position by a method wherein plane mirrors are so arranged that a plurality of internal laser beam folded back by a plurality of plane mirrors are crossed each other at the sight from the side of an output mirror. CONSTITUTION:Eight discharge tubes 2, 2'...5, 5' are arranged inside a supporting frame. The laser beam 7 reflected on a total reflection mirror 8 is bent on the plane mirrors 10a and 10d at 180 deg. and comes to the plane mirror 10f, then bent on the plane mirrors 10f and 10e at 180 deg. and comes to the plane mirror 10c, further bent on the plane mirrors 10c and 10b at 180 deg. and comes to the output mirror 9. These mirrors 10a-10f are so arranged in solid manner that an angle alpha each incidence-reflection surface 30a and 30b, and that 30d and 30c make becomes e.g. alpha=60 deg.. Thereby, the deformation of the laser beam which receives reflection on each mirror 10a-10f appears around the center axis of the beam at an equal angle; therefore the laser beam having a circular section also after deformation can be kept.
摘要翻译：目的：为了能够通过一种方法来获得焦点位置滑动较少的激光束，其中平面镜被布置成使得由多个平面镜折回的多个内部激光束在从侧面输出镜。构成：八个放电管2,2'... 5,5'设置在支撑架内。在全反射镜8上反射的激光束7在180度处在平面镜10a和10d上弯曲。并且到达平面镜10f，然后在180度处在平面镜10f和10e上弯曲。并且到达平面镜10c，在平面镜10c和10b上进一步在180度弯曲。并且到达输出反射镜9.这些反射镜10a-10f以固体方式布置成使得每个入射反射表面30a和30b以及30d和30c的角度α成为例如。 α= 60度。因此，在每个反射镜10a-10f上接收反射的激光束的变形围绕光束的中心轴线以相等的角度出现; 因此，可以保持在变形之后具有圆形截面的激光束。

5. 发明专利

JPS5687392A CARBON DIOXIDE LASER UNIT 失效
公开(公告)号：JPS5687392A
公开(公告)日：1981-07-15
申请号：JP16413679
申请日：1979-12-19
申请人： HITACHI LTD
发明人： SASAKI HIROHARU , KANBARA HIROYUKI , KUWABARA KOUJI , SHIROKURA TOSHIJI , TAKEMORI SEI
IPC分类号： H01S3/097 , H01S3/036 , H01S3/134
摘要： PURPOSE:To stabilize oscillation by maintaining a CO concentration at the optimum value by providing a sensor detecting gas status in a circulatory passage in a carbon dioxide laser device providing an oxidizing catalyst in the gas circulatory passage wherein the heating temperature of the catalyst is established. CONSTITUTION:A carbon dioxide laser unit is composed of a laser oscillation section 21 and a gas circulatory regeneration section 22. Discharge is performed by the laser oscillation section 21 and CO concentration of the gas having increased CO concentration is reduced by an oxidizing catalyst 12. Then, the gas is cooled by a heat exchanger 2 to feed to the laser oscillation section 21 again by increasing the pressure by a blower 1. In increasing the CO concentration, a sensor 18 detects to raise the temperature of the oxidizing catalyst 12 by controlling a power source 15 for heater and a coefficient of CO oxidation is increased. On the other hand in decreasing the CO concentration, the temperature of the catalyst 12 is lowered. As the result, the CO concentration in gas will be maintained at the optimum value for performing stable oscillation.

6. 发明专利

JPS59223407A OPTICAL DEVICE FOR LASER 失效
公开(公告)号：JPS59223407A
公开(公告)日：1984-12-15
申请号：JP9786383
申请日：1983-06-03
申请人： HITACHI LTD
发明人： WADA AKIRA , SUGAWARA HIROYUKI , KUWABARA KOUJI , TAKEMORI SEI , SASAKI HIROHARU , YANO MAKOTO
IPC分类号： G02B17/00 , B23K26/064 , H01S3/00 , B23K26/06
摘要： PURPOSE:To improve the condensing property of a beam condensing device by arranging at least two spherical mirrors between a projected spherical mirror and a substance to be worked so that planes formed by incident light and reflected light intersect with each other at right angles. CONSTITUTION:A beam 3 is folded and contracted by a recessed spherical mirror 4 and the projected spherical mirror 5 and projected as beam 9. The beam 9 is changed upwards at its direction by a plane mirror 20 as a beam 21, reflected by a condensing recessed mirror 22 and condensed like a beam 23. The plane mirror 20 and the recessed spherical mirror 22 are arranged so that a plane constituted of the optical axis of the contracting beam and a plane constituted of the condensing beam, i.e. the plane constituted of the optical axes of the beams 3, 7, 9 and the plane constituted of the optical axes of the beams 9, 21, 23, intersect with each other. In addition, the angle theta3 formed by the beam 23 and the optical axis is set up so that the ratio of the major axis to the minor axis of an ellipse formed by the beam 23 on the basis of the folding spherical aberration of the recessed spherical mirror 22 is almost equal to the ratio of the major axis to the minor axis of the section 17 of the beam 9.

7. 发明专利

JPS59175180A Lateral excitation type gas laser device 失效
标题翻译：侧向激励式气体激光装置
公开(公告)号：JPS59175180A
公开(公告)日：1984-10-03
申请号：JP5080883
申请日：1983-03-24
申请人： Hitachi Ltd
发明人： TAKEMORI SEI , SUGAWARA HIROYUKI , KUWABARA KOUJI
IPC分类号： H01S3/038
CPC分类号： H01S3/038
摘要： PURPOSE:To generate a high output with a small-sized device by arranging a plurality of cathodes having ring-like discharge parts in a gas flow. CONSTITUTION:The cathodes 3a, 3b,...3i respectively consist of linear parts 3a1, 3b1,...3i1 and the ring-like discharge parts 3a2, 3b2,...3i2, and glow discharge 6 generates between these ring-like discharge parts and the anode 2. Such a construction produces the effect of no concentration of the glow discharge to the cathode tip 3a0. As a result, said discharge generates uniformly in the ring-like discharge part 3a2, resulting in the increase of discharge current. Besides, since the tip 3a0 is put in contact with the linear part 3a1 smaller than said part for temperature increase, there is the effect that the cooling of said part 3a2 is enhanced.
摘要翻译：目的：通过在气流中排列具有环状放电部件的多个阴极，通过小尺寸器件产生高输出。构成：阴极3a，3b，... 3i分别由直线部分3a1,3b1，... 3i1和环状放电部分3a2,3b2，... 3i2组成，辉光放电6在这些环状电极类似的放电部分和阳极2.这种结构产生不将辉光放电集中到阴极尖端3a0的效果。结果，所述放电在环状放电部分3a2中均匀地产生，导致放电电流的增加。此外，由于尖端3a0与小于所述部分的直线部分3a1接触以增加温度，所以具有提高部分3a2的冷却效果的效果。

8. 发明专利

JPS5986278A HIGH SPEED AXIAL FLOW TYPE GAS LASER DEVICE 失效
公开(公告)号：JPS5986278A
公开(公告)日：1984-05-18
申请号：JP19591282
申请日：1982-11-10
申请人： HITACHI LTD
发明人： SASAKI HIROHARU , SUGAWARA HIROYUKI , KUWABARA KOUJI , SHIROKURA TOSHIJI , KAWAKUBO YUKIO , TAKEMORI SEI
IPC分类号： H01S3/097 , H01S3/036 , H01S3/041 , H01S3/07 , H01S3/22
摘要： PURPOSE:To enable to generate stable output from a small-sized laser without losing point symmetry or lateral and longitudinal symmetry by arranging a centrifugal blower which has a plurality of laser gas discharge outlets at the center of a laser device. CONSTITUTION:Laser gases 33a, 33b, 34a, 34b which are respectively raised at temperature due to an electric dischrge in discharge tubes 1a, 1b, 1c, 2a, 2b, 2c are cooled through heat exhangers 7a, 7b, fed from a gas suction inlet 37 through a gas flow passage 36 into a blower 27, compressed, pressurized, and discharged into pipes 12a, 12b and introduced as gas flows 32a, 32b into a central gas vessel 30. The gas flows 32a, 32b are uniformly distributed into the respective discharge tubes, and the laser gases are circulated. The entire laser device is constructed symmetrically, thereby minimizing the optical axial displacement due to the influence of heat and vacuum force of a light resonator and providing a stable laser device which has less variation in the laser output.

9. 发明专利

JPS5952887A Laser generator 失效
标题翻译：激光发生器
公开(公告)号：JPS5952887A
公开(公告)日：1984-03-27
申请号：JP16237482
申请日：1982-09-20
申请人： Hitachi Ltd
发明人： SHIROKURA TOSHIJI , SUGAWARA HIROYUKI , KAWAKUBO YUKIO , SASAKI HIROHARU , KUWABARA KOUJI
IPC分类号： H01S3/03 , H01S3/08 , H01S3/139
CPC分类号： H01S3/139
摘要： PURPOSE:To enable to obtain the stabilized laser output for the titled device by method wherein the inclination of a supporting frame due to deformation is reduced by providing an extension- contraction absorbing device. CONSTITUTION:An extension-contraction absorbing device 20 is provided among a feeding vessel 7, discharge vessel 8 and a supporting frame 5 corresponding to said vessels, the first holding part 21 is attached to the side face of the supply vessel corresponding to the supporting frame 5, and a V-shape groove 22 is formed directing from the upper surface side to the lower surface side of the first supporting part 21. The second supporting part 23 corresponding to the V-shape groove 22 is attached to the supporting frame 5, and the sliding part 24 attached to the second supporting part 23 is placed in the V-shaped groove. The center line is coincided with an optical axis and, consequently, the center parts of the first and second supporting parts 21 and 23 and the sliding part 24 are coincided with the center line 24. By having the extension-contraction absorbing device 20, when the temperature of the feeding and discharging vessels 7 and 8 are suddenly moved up and they are extended to height direction at the starting of a gas laser generator 1A, the supporting frame 5 follows said vessels, no force works on the bellows 9 in shearing direction, said bellows 9 merely expands or contracts in the longitudinal direction according to the change of temperature without having no bending force, thereby producing no inclination on the supporting frame 5.
摘要翻译：目的：通过提供伸缩收缩装置，通过减少由于变形引起的支撑框架的倾斜度的方法，能够获得标题装置的稳定的激光输出。构成：在供给容器7，放电容器8和对应于所述容器的支撑框架5之间设置有伸缩收缩装置20，第一保持部21安装在与支撑框架对应的供给容器的侧面形成从第一支撑部21的上表面侧到下表面侧的V形槽22.与V形槽22对应的第二支撑部23安装在支撑框架5上，并且将附接到第二支撑部23的滑动部24放置在V形槽中。中心线与光轴重合，因此，第一和第二支撑部分21和23以及滑动部分24的中心部分与中心线24重合。通过具有伸缩收缩装置20，当进料和排出容器7和8的温度在气体激光发生器1A的启动时突然向上移动并且在高度方向上延伸，支撑框架5沿着所述容器，在剪切方向上不会在波纹管9上施加力所述波纹管9仅在不具有弯曲力的情况下根据温度变化沿长度方向膨胀或收缩，从而在支撑框架5上不产生倾斜。

10. 发明专利

JPS5843588A LASER GENERATING DEVICE 失效
公开(公告)号：JPS5843588A
公开(公告)日：1983-03-14
申请号：JP14102281
申请日：1981-09-09
申请人： HITACHI LTD
发明人： KUWABARA KOUJI , SUGAWARA HIROYUKI , SHIROKURA TOSHIJI , KAWAKUBO YUKIO , SASAKI HIROHARU
IPC分类号： H01S3/08 , H01S3/03 , H01S3/036 , H01S3/041 , H01S3/081 , H01S3/22
摘要： PURPOSE:To miniturize a device and obtain good quality laser light with a high output, by providing a pair of mirrors on both ends of a discharge tube, and obliquely crossing the laser light way with the center axis of the discharge tube resulting in a constitution for a reciprocating-rotation, and then reducing the pressure loss of a laser midium. CONSTITUTION:Laser light can be thinned and lengthened, and the laser output of single mode can be obtained by constituting mirrors provided on both ends of a discharge space 13 so that the optical axis may obliquely cross with the center axis of a discharge tube 10 and reciprocating-rotates in the discharge space 13 while reflected by the both end mirrors. Since the sectional area of the cylindrical discharge space 13 which is the passage of the laser medium is large, even with a high speed of the laser medium, the medium can be passed in a state that the pressure loss is extremely small. There fore, the window pressure required to a blower 17 is sufficient in a small power. For the device itself, one discharge tube 10 is used, and electrodes used therefor are also sufficient in a pair. Accordingly, the assembly-adjustment is facilitated, and the number of mirrors can be reduced.

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