WO2017163762A1 - ファイバ空間結合装置 - Google Patents
ファイバ空間結合装置 Download PDFInfo
- Publication number
- WO2017163762A1 WO2017163762A1 PCT/JP2017/007272 JP2017007272W WO2017163762A1 WO 2017163762 A1 WO2017163762 A1 WO 2017163762A1 JP 2017007272 W JP2017007272 W JP 2017007272W WO 2017163762 A1 WO2017163762 A1 WO 2017163762A1
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- WO
- WIPO (PCT)
- Prior art keywords
- main body
- fiber
- coupling device
- gas
- space coupling
- Prior art date
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/36—Mechanical coupling means
- G02B6/38—Mechanical coupling means having fibre to fibre mating means
- G02B6/3807—Dismountable connectors, i.e. comprising plugs
- G02B6/3833—Details of mounting fibres in ferrules; Assembly methods; Manufacture
- G02B6/3866—Devices, tools or methods for cleaning connectors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
- B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
- B23K26/064—Shaping the laser beam, e.g. by masks or multi-focusing by means of optical elements, e.g. lenses, mirrors or prisms
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
- B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
- B23K26/067—Dividing the beam into multiple beams, e.g. multifocusing
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/0006—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 with means to keep optical surfaces clean, e.g. by preventing or removing dirt, stains, contamination, condensation
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
- G02B6/4206—Optical features
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4256—Details of housings
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4296—Coupling light guides with opto-electronic elements coupling with sources of high radiant energy, e.g. high power lasers, high temperature light sources
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4296—Coupling light guides with opto-electronic elements coupling with sources of high radiant energy, e.g. high power lasers, high temperature light sources
- G02B2006/4297—Coupling light guides with opto-electronic elements coupling with sources of high radiant energy, e.g. high power lasers, high temperature light sources having protection means, e.g. protecting humans against accidental exposure to harmful laser radiation
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/32—Optical coupling means having lens focusing means positioned between opposed fibre ends
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4292—Coupling light guides with opto-electronic elements the light guide being disconnectable from the opto-electronic element, e.g. mutually self aligning arrangements
Definitions
- the present disclosure relates to a fiber space coupling device that transmits a beam incident on a fiber by a condenser lens.
- the laser light emitted from the laser oscillation device needs to be transmitted to a processing point (processing head) for use in processing.
- Methods for transmitting laser light include a method using a mirror and a method using a fiber. With respect to laser light having a small transmission loss due to the fiber, since the laser light can be easily transmitted, the laser light is transmitted using the fiber.
- the laser light is coupled to a process fiber using a fiber space coupling device having an optical system to guide the laser light to a processing point (processing head) for welding and cutting. It is common to use.
- FIG. 4 is a schematic diagram showing a configuration of a laser processing apparatus 1130 having a conventional fiber space coupling device 1004.
- the fiber space coupling device 1004 includes a housing 1112, a condenser lens 1116, a receptacle 1117, and a process fiber 1118.
- the inside of the housing 1112 is filled with the purge gas 1113.
- the laser oscillator 1114 emits laser light.
- the condensing lens 1116 condenses the laser light.
- the incident end 1118a of the process fiber 1118 is inserted into the receptacle 1117 and held.
- the laser light is focused on the process fiber 1118.
- the clean unit 1119 has a filter that removes surrounding foreign matter 1120.
- the clean unit 1119 blows out a clean clean airflow 1121 downward through this filter.
- the sheet 1122 suppresses the dissipation of the clean airflow 1121.
- the laser light emitted from the laser oscillator 1114 is condensed by the condenser lens 1116, enters the process fiber 1118, is transmitted, and then subjected to processing by a processing head (not shown).
- Patent Document 1 As a prior art document related to the invention of this application, for example, Patent Document 1 is known.
- the fiber space coupling device has a detachable process fiber, an optical system, and a main body.
- the process fiber guides laser light.
- the optical system condenses the laser light on the process fiber.
- the main body holds the optical system and has a supply port for supplying gas between the process fiber and the optical system.
- FIG. 1 is a schematic diagram showing the configuration of the fiber space coupling device according to the first embodiment.
- FIG. 2 is a schematic diagram illustrating a configuration of the fiber space coupling device according to the second embodiment.
- FIG. 3 is a schematic diagram illustrating a configuration of the fiber space coupling device according to the third embodiment.
- FIG. 4 is a schematic diagram showing a configuration of a laser processing apparatus having a conventional fiber space coupling device.
- the dustproof mechanism of the conventional fiber space coupling device 1004 requires a wide space that satisfies the clean air flow 1121 and a powerful clean unit 1119.
- the receptacle 1117 and the process fiber 1118 include an open space, it is difficult to keep the cleanliness of the space constant even if the cleanliness of the clean airflow when blowing out can be made constant.
- FIG. 1 is a schematic diagram illustrating a configuration of a fiber space coupling device 100 according to the first embodiment.
- the fiber space coupling device 100 includes a condenser lens 2 (optical system), a detachable process fiber 3, and a main body 6.
- the condensing lens 2 condenses the laser light 1 on the process fiber 3.
- the process fiber 3 guides the laser beam 1 collected by the condenser lens 2.
- the main body 6 has a substantially box shape and holds the condenser lens 2.
- the fiber space coupling device 100 may include a lens holder 4, a receptacle 5, and a housing 7.
- the lens holder 4 holds the condenser lens 2.
- the receptacle 5 holds the process fiber 3 in a detachable manner.
- the housing 7 holds the main body 6.
- the main body 6 of the fiber space coupling device 100 is provided with a gas supply port 8 (purge gas supply port) for supplying gas (purge gas).
- the gas supply port 8 is provided between the condenser lens 2 of the main body 6 and the receptacle 5.
- the gas supply port 8 is provided between the process fiber 3 and the condenser lens 2.
- the fiber space coupling device 100 may include a filter 9 (particle removal filter), a dehumidifying device 10, and a gas pipe 11.
- the filter 9 removes dust from the purge gas.
- the dehumidifier 10 dehumidifies the purge gas.
- the gas pipe 11 supplies a purge gas.
- the laser beam 1 passes through the housing 7 and the main body 6 and is transmitted to the condenser lens 2. Inside the main body 6, the laser beam 1 is condensed at the optimum position of the process fiber 3 by adjusting the condenser lens 2 in the three axis directions of XYZ (orthogonal coordinate system) via the lens holder 4. The condensed laser beam 1 travels inside the process fiber 3.
- the guided laser beam 1 is transmitted to the processing point (processing head) by the process fiber 3 and used as a light source for welding processing, cutting processing, and the like.
- the inside of the main body 6 and the casing 7 is hermetically sealed to prevent damage to the condensing lens 2, the process fiber 3, and the optical elements inside the casing 7, and so that dust does not adhere to them. It is in a clean state.
- the process fiber 3 is replaced due to deterioration or breakage of the process fiber 3, it is necessary to attach or detach the process fiber 3 in the receptacle 5.
- the inside of the main body 6 is exposed to the outside air, and dust may enter.
- the fiber space coupling device 100 of the present embodiment clean purge gas that has passed through the dehumidifying device 10 and the filter 9 is supplied into the main body 6 from the gas supply port 8 provided in the main body 6. Then, the inside of the main body 6 is positively pressurized, and dust can be prevented from entering the inside of the main body 6.
- the process fiber 3 when the process fiber 3 is removed, the fluid resistance received by the purge gas discharged from the gas supply port 8 through the opening of the receptacle 5 is from the gas supply port 8 through the periphery of the condenser lens 2 (optical system). It is smaller than the fluid resistance received by the purge gas flowing inside the main body 6. As a result, intrusion of dust into the main body 6 can be prevented.
- a filter 9 and a dehumidifier 10 are connected to the gas supply port 8.
- the supplied purge gas can be sufficiently dried, and the reliability with respect to humidity is improved.
- the filter 9 the supplied purge gas can be sufficiently cleaned, and the reliability with respect to dust is improved.
- the supplied purge gas can be sufficiently cleaned and dried.
- the high-performance filter 9 and the dehumidifying device 10 are used, dust derived from purge gas can be further reduced, and adhesion of dust to the optical elements such as the condenser lens 2 can be further prevented.
- a filter having a performance of removing 90% or more of dust of 1 micrometer or more As the dehumidifier 10, it is preferable to use a dehumidifier having a capability of supplying a dry gas having a dew point of -10 degrees Celsius or less.
- the main body 6 and the housing 7 have an airtight structure, dust does not normally enter, so that the barge gas may be supplied to the main body 6 only when the process fiber 3 is attached or detached.
- the inside of the housing 7 is at a positive pressure when the process fiber 3 is attached and detached.
- the main body 6 is provided with a gas supply port 8. Since the purge gas is discharged to the outside through the opening of the receptacle 5 from the gas supply port 8, it is not necessary to supply a large amount of high-pressure purge gas even when the volume of the housing 7 is large.
- the purge gas can be directly supplied into the main body 6 at a desired pressure.
- purge gas is supplied from the housing 7 to fill the inside of the main body 6, it becomes difficult to secure a sufficient purge gas flow rate (pressure) necessary for extracting the process fiber 3.
- a sufficient purge gas flow rate (pressure) can be ensured when the process fiber 3 is pulled out.
- the condensing lens 2 having a certain thickness or more is required so as to withstand the gas pressure.
- the purge gas can be directly supplied to the inside of the main body 6 at a desired pressure by providing the main body 6 with the gas supply port 8. Therefore, the thickness of the condenser lens 2 can be reduced. Further, since the purge gas is directly supplied to the inside of the main body 6, when the process fiber 3 is pulled out, it is possible to easily ensure the purge gas flow rate necessary for preventing dust from entering.
- the time until the purge gas reaches the required pressure can be shortened.
- a clean purge gas is directly supplied to the inside of the main body 6 through the filter 9 and the dehumidifying device 10, it is compared with the purge gas supplied by the housing 7 and in contact with various members and supplied after passing through the members. Thus, a purer purge gas can be supplied.
- the inside of the main body 6 is directly purged with the gas, so that the purge gas is easily transmitted between the condenser lens 2 and the process fiber 3, thereby preventing the adhesion of dust. it can.
- Embodiment 2 In the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.
- the present embodiment is different from the first embodiment in that air (air) is used as the purge gas, and a pressure sensor 230 as a pressure measuring means is provided in the main body 26, and the purge air is pressurized and supplied.
- the pump 250 as the supply means is controlled based on a signal from the pressure sensor 230.
- FIG. 2 is a schematic diagram showing the configuration of the fiber space coupling device 200 according to the second embodiment.
- the fiber space coupling device 200 includes a condenser lens 2 (optical system), a process fiber 23, and a main body 26. Furthermore, the fiber space coupling device 200 may include the receptacle 25 and the housing 7.
- the process fiber 23 guides the laser beam 1 collected by the condenser lens 2.
- the receptacle 25 holds the process fiber 23 in a detachable manner. That is, the receptacle 25 is used for easily attaching and detaching the process fiber 23.
- the main body 26 has a substantially box shape and holds the condenser lens 2.
- the housing 7 holds the main body 26.
- the fiber space coupling device 200 has a gas supply port 28 (purge air supply port).
- the fiber space coupling device 200 may include a filter 29 (particle removal filter), a dehumidifying device 210, and a gas pipe 211.
- the gas supply port 28 is a supply port having a diameter of about 4 mm provided between the condenser lens 2 of the main body 26 and the receptacle 25.
- the filter 29 is used to remove dust from the purge air. Specifically, the filter 29 removes particles having a diameter of 1 micrometer or more.
- the dehumidifier 210 dehumidifies the purge air.
- the gas pipe 211 is used for transporting purge air. Specifically, the gas pipe 211 is a fluororesin tube having an inner diameter of 4 mm.
- the substantially box-shaped main body 26 has a hole 41 having a diameter of about 4 mm at a position not facing the gas supply port 28.
- a pressure sensor 230 which is a pressure measuring means inside the main body is provided through the hole 41.
- a pump 250 that pressurizes and supplies purge air is provided in the path of the gas pipe 211.
- the suction side of the pump 250 is open to the atmosphere.
- the discharge side of the pump 250 is connected to the dehumidifier 210 and the filter 29 via the gas pipe 211.
- the pump 250 is connected to the pressure sensor 230 via the pump control unit 240.
- the pump 250 is ON / OFF controlled by the pump control unit 240 based on a signal from the pressure sensor 230.
- the pump 250 is turned on and off so that the pressure sensor 230 provided in the main body 26 always maintains a constant reference pressure.
- the reference pressure for example, it is desirable that the gauge pressure is 0.01 to 0.1 megapascal. More preferably, the gauge pressure is 0.01 megapascal to 0.05 megapascal.
- the gauge pressure is a relative pressure when the atmospheric pressure is zero. For example, when the reference pressure is set to 0.05 megapascal, the pump 250 is driven when the gauge pressure inside the main body 26 falls below 0.05 megapascal. Then, until the gauge pressure in the main body 26 exceeds 0.05 megapascals, clean and dehumidified dry air is supplied into the main body 26, and the gauge pressure in the main body 26 exceeds 0.05 megapascals. The pump 250 stops.
- the process fiber 23 is to be pulled out from the main body 26.
- the receptacle 25 is operated and loosened.
- the internal pressure of the main body 26 decreases from the reference pressure, and the pump 250 is operated.
- the internal pressure of the main body 26 decreases to atmospheric pressure.
- the pump 250 continues to be driven, and clean, dehumidified and dry air continues to be supplied into the main body 26.
- the supplied air continues to be discharged from the opening of the receptacle 25 to the outside (in the atmosphere). That is, when the process fiber 23 is removed, the fluid resistance received by the air discharged from the gas supply port 28 through the opening of the receptacle 25 is the main body through the periphery of the condenser lens 2 (optical system) from the gas supply port 28. 26, which is smaller than the fluid resistance experienced by the air flowing inside. As a result, intrusion of dust into the main body 6 can be prevented.
- the process fiber 23 is inserted into the main body 26 again, and the receptacle 25 is operated to lock the process fiber 23 so that it does not come off. Then, the internal pressure of the main body 26 eventually increases, the gauge pressure reaches 0.05 megapascals, and the pump 250 stops.
- the internal pressure of the main body 26 is monitored using the pressure sensor 230 to determine whether the process fiber 23 is inserted or removed.
- the insertion / extraction of the process fiber 23 may be determined by monitoring changes in the luminance (preferably the amount of visible light) inside the main body 26 using a photodiode.
- the pump 250 is controlled by turning it on and off.
- the discharge amount may be continuously varied by controlling the voltage or current applied to the pump 250.
- the pump 250 was turned on and off to control the internal pressure of the main body 26 to be constant. However, the pump 250 may be stopped when the laser irradiation is started and the pump 250 may be driven when the laser irradiation is stopped.
- suction port of the pump 250 is opened to the atmosphere, it may be connected to a purge air path or a purge gas path constituted by a closed loop.
- the filter 29 and the dehumidifying device 210 are provided on the discharge side of the pump 250.
- the filter 29 and the dehumidifying device 210 may be provided on the suction side of the pump 250, and the discharge side of the pump 250 may be connected to the gas supply port 28 via the gas pipe 11.
- the interior of the main body 26 is always at a positive pressure by always maintaining the interior of the main body 26 higher than the reference pressure. As a result, dust does not enter the inside of the main body 26 from the outside.
- the pump 250 is driven and the inside of the main body 26 can always be maintained at a positive pressure. As a result, dust does not enter the inside of the main body 26 from the outside.
- purge air is used instead of purge gas, equipment and operation costs associated with purge gas are unnecessary. Further, by providing the pressure sensor 230 at a position that does not face the gas supply port 28, the internal pressure of the main body 26 can be measured instead of the purge air discharge pressure.
- the inside of the main body 26 is always at positive pressure, the force required when the process fiber 23 is pulled out is reduced, and it becomes easier to pull out.
- a receptacle disconnection detection circuit 370 that is, a process fiber insertion / removal determination means, that is, a lock release detection circuit is installed instead of control by a pump that supplies pressurized air for purge air. It is a point that has been. Furthermore, when the internal pressure of the main body 36 becomes excessive, the valve opens and a relief valve 360 is provided as a pressure release means for releasing the excessive pressure, and the inner diameter of the system for supplying purge air is increased.
- FIG. 3 is a schematic diagram showing the configuration of the fiber space coupling device 300 according to the third embodiment.
- the fiber space coupling device 300 includes a condenser lens 2 (optical system), a process fiber 33, and a main body 36.
- the process fiber 33 guides the laser beam 1 collected by the condenser lens 2.
- the receptacle 35 holds the process fiber 33 detachably. That is, the receptacle 35 is used to easily attach and detach the process fiber 33.
- the main body 36 has a substantially box shape and holds the condenser lens 2.
- the housing 7 holds the main body 36.
- the process fiber 33 has a disconnection detection circuit 370 that detects disconnection.
- the fiber space coupling device 300 has a gas supply port 38 (purge air supply port).
- the fiber space coupling device 300 may include a filter 39 (particle removal filter), a dehumidifying device 310, and a gas pipe 311.
- the gas supply port 38 is a supply port having a diameter of 6 mm provided between the condenser lens 2 of the main body 36 and the receptacle 35.
- the filter 39 is used to remove dust from the purge air. Specifically, the filter 39 removes particles having a diameter of 5 micrometers or more.
- the dehumidifier 310 dehumidifies the purge air.
- the gas pipe 11 is a fluororesin tube having an inner diameter of 6 mm and is used for supplying purge air.
- a hole 43 having a diameter of about 4 mm is formed inside the main body 36.
- a relief valve 360 with a check valve that prevents backflow of gas is installed in the hole 43.
- the set gauge pressure of the relief valve 360 is 0.01 megapascal to 0.3 megapascal, preferably 0.01 megapascal to 0.1 megapascal.
- a pump 350 that pressurizes and supplies purge air is provided.
- the suction side of the pump 350 is open to the atmosphere.
- the discharge side of the pump 350 is connected to the filter 39 and the dehumidifier 310 via a gas pipe 311.
- the pump 350 is connected to the disconnection detection terminal of the receptacle 35 via the pump control unit 340.
- the pump control unit 340 receives the irradiation of the laser beam 1, that is, the on / off signal of the laser beam 1, and controls the pump 350 according to the signal. Specifically, the pump control unit 340 operates the pump 350 only when the laser beam 1 is turned off and a disconnection is detected, and otherwise the pump 350 is not operated.
- the laser beam 1 passes through the housing 7 and is transmitted to the condenser lens 2.
- the condenser lens 2 By installing the condenser lens 2 inside the main body 36 and adjusting it in the three axial directions of XYZ (orthogonal coordinate system) via the lens holder 4, the laser light 1 is condensed at the optimum position of the process fiber 33, The light is guided to the process fiber 33.
- the guided laser beam 1 is transmitted to the processing point (processing head) by the process fiber 33 and used as a light source for welding processing, cutting processing, and the like.
- the process fiber 33 is inserted into the main body 36 using the receptacle 35.
- the process fiber 33 and the receptacle 35 form a closed loop, which functions as a disconnection detection circuit 370.
- a closed loop made of metal such as copper wire is formed inside or outside the process fiber 33 and the receptacle 35.
- the process fiber 33 is pulled out from the main body 36.
- the laser is off.
- the receptacle 35 is unlocked.
- the receptacle 35 and the process fiber 33 are separated, and the disconnection detection circuit 370 becomes an open loop, and disconnection is detected.
- the pump control unit 340 detects the laser off and disconnection, and operates the pump 350. By operating the pump 350, clean, dehumidified and dry purge air is supplied into the main body 36. The purge air makes the internal pressure of the main body 36 0.1 MPa or more. Therefore, the relief valve 360 is opened and the purge air is released to the outside air.
- the purge air continues to be ejected from the gas supply port 38, and the purge air is discharged from the inside of the main body 36 through the opening of the receptacle 35 toward the outside of the main body 36. .
- the relief valve 360 is closed.
- the disconnection detection circuit 370 is formed by the process fiber 33 and the receptacle 35.
- an unlock signal may be used for the receptacle 35.
- the relief valve 360 is directly provided on the main body 36.
- the relief valve 360 and the main body 36 may be separated from each other.
- the relief valve 360 may be connected to the main body 36 via a tube.
- the stop and operation of the pump 350 are controlled with respect to the insertion and removal of the process fiber 33 with respect to the internal space of the main body 36 including the relief valve 360. Thereby, when the process fiber 33 is pulled out, the pump 350 is operated, so that dust can be prevented from entering the main body 36.
- the fiber space coupling device of the present disclosure has a structure in which the purge gas is directly fed into the space between the condenser lens and the process fiber. Therefore, it is possible to prevent dust from entering the fiber space coupling device. As a result, it is possible to prevent dust from adhering to the condensing lens and the process fiber and contamination.
- the fiber space coupling device of the present disclosure can ensure not only the reliability and quality of the fiber space coupling device, but also the reliability of the entire laser oscillation device.
- the fiber space coupling device of the present disclosure has a structure that prevents dust from entering the laser light transmission space. Therefore, reliability and quality as a fiber space coupling device and a laser oscillation device can be ensured, and it is useful for a laser oscillation device using a process fiber.
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- General Physics & Mathematics (AREA)
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Abstract
Description
図1は、実施の形態1に係るファイバ空間結合装置100の構成を示す模式図である。
本実施の形態において実施の形態1と同様の構成については同一の番号を付して詳細な説明を省略する。本実施の形態が、実施の形態1と異なる点は、パージガスとして、空気(エアー)を使用する点と、本体26に圧力計測手段である圧力センサ230を設け、パージエアを加圧して供給するガス供給手段であるポンプ250を、圧力センサ230からの信号に基づき制御する点である。
本実施の形態において実施の形態1、および、実施の形態2と同様の構成については同一の番号を付して詳細な説明を省略する。本実施の形態が実施の形態2と異なる点は、パージエアを加圧して供給するポンプによる制御の代わりに、プロセスファイバ挿抜判定手段であるレセプタクルの断線検知回路370、すなわち、ロック解除検知回路が設置されている点である。さらに、本体36の内部圧力が過大になると弁が開き、過大な圧力を逃がす圧力開放手段であるリリーフバルブ360を設けた点と、パージエアを供給する系の内径を大きくした点である。
1 レーザ光
2 集光レンズ
3 プロセスファイバ
4 レンズホルダ
5 レセプタクル
6 本体
7 筐体
8 ガス供給口
9 フィルタ
10 除湿装置
11 ガス配管
23 プロセスファイバ
25 レセプタクル
26 本体
28 ガス供給口
29 フィルタ
33 プロセスファイバ
35 レセプタクル
36 本体
38 ガス供給口
39 フィルタ
41,43 穴
100,200,300 ファイバ空間結合装置
210 除湿装置
211 ガス配管
230 圧力センサ(圧力計測手段)
240 ポンプコントロールユニット
250 ポンプ(ガス供給手段)
310 除湿装置
311 ガス配管
340 ポンプコントロールユニット
350 ポンプ(ガス供給手段)
360 リリーフバルブ(圧力開放手段)
370 断線検知回路
1004 ファイバ空間結合装置
1112 筐体
1113 パージガス
1114 レーザ発振器
1116 集光レンズ
1117 レセプタクル
1118 プロセスファイバ
1118a 入射端
1119 クリーンユニット
1120 異物
1121 クリーン気流
1122 シート
1130 レーザ加工装置
Claims (13)
- レーザ光を導光する着脱可能なプロセスファイバと、
前記レーザ光を前記プロセスファイバに集光する光学系と、
前記光学系を保持し、前記プロセスファイバと前記光学系との間にガスを供給するための供給口を有する本体と、
を備える、
ファイバ空間結合装置。 - 前記供給口にフィルタが連結されており、
前記フィルタを通過したガスが前記供給口を通じて前記本体内に供給される
請求項1に記載のファイバ空間結合装置。 - 前記フィルタは、1マイクロメートル以上の塵埃を90%以上除去する性能を有する
請求項2に記載のファイバ空間結合装置。 - 前記供給口に除湿装置が連結されており、
前記除湿装置を通過したガスが前記供給口を通じて前記本体内に供給される
請求項1から3のいずれか1項に記載のファイバ空間結合装置。 - 前記除湿装置は、露点が摂氏-10度以下のドライガスを供給する性能を有する
請求項4に記載のファイバ空間結合装置。 - 前記供給口より常時ガスが供給され、前記本体の内部が陽圧に保持されている
請求項1から5のいずれか1項に記載のファイバ空間結合装置。 - 前記プロセスファイバ着脱時に、前記供給口より前記本体にガスが供給され、前記プロセスファイバ着脱時に前記筐体の内部は陽圧である
請求項1から5のいずれか1項に記載のファイバ空間結合装置。 - 前記供給口より供給されるガスは空気である
請求項1から7のいずれか1項に記載のファイバ空間結合装置。 - 前記ガスを供給するガス供給手段を、
さらに備えた
請求項1に記載のファイバ空間結合装置。 - 前記本体の内部の圧力を計測する圧力計測手段を、
さらに備え、
前記本体の前記内部の圧力が基準圧力より低い場合に、前記ガス供給手段により、前記本体の前記内部に前記ガスが供給される
請求項9に記載のファイバ空間結合装置。 - 前記本体の内部の圧力が所定の基準値を超えると前記空間のガスを開放する圧力開放手段を、
さらに備えた
請求項1に記載のファイバ空間結合装置。 - 前記プロセスファイバを前記本体に保持するレセプタクルと、
前記プロセスファイバと前記レセプタクルで構成される断線検知回路とを、
さらに備えた
請求項1に記載のファイバ空間結合装置。 - 前記プロセスファイバが前記本体から分離されて、前記本体の内部が外気と通じている状態において、
前記供給口から前記外気に放出される前記ガスの流体抵抗は、
前記供給口から前記光学系の周囲を通じて前記本体の内部に流れる前記ガスの流体抵抗よりも小さい
請求項1記載のファイバ空間結合装置。
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JP2018507160A JPWO2017163762A1 (ja) | 2016-03-23 | 2017-02-27 | ファイバ空間結合装置 |
US16/072,489 US20190064451A1 (en) | 2016-03-23 | 2017-02-27 | Fiber spatial coupling device |
CN201780009358.2A CN108603984A (zh) | 2016-03-23 | 2017-02-27 | 光纤空间耦合装置 |
EP17769807.3A EP3435127B1 (en) | 2016-03-23 | 2017-02-27 | Fiber spatial coupling device |
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JP2016057967 | 2016-03-23 | ||
JP2016-057967 | 2016-03-23 |
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PCT/JP2017/007272 WO2017163762A1 (ja) | 2016-03-23 | 2017-02-27 | ファイバ空間結合装置 |
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US (1) | US20190064451A1 (ja) |
EP (1) | EP3435127B1 (ja) |
JP (1) | JPWO2017163762A1 (ja) |
CN (1) | CN108603984A (ja) |
WO (1) | WO2017163762A1 (ja) |
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- 2017-02-27 US US16/072,489 patent/US20190064451A1/en not_active Abandoned
- 2017-02-27 WO PCT/JP2017/007272 patent/WO2017163762A1/ja active Application Filing
- 2017-02-27 JP JP2018507160A patent/JPWO2017163762A1/ja active Pending
- 2017-02-27 EP EP17769807.3A patent/EP3435127B1/en active Active
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Also Published As
Publication number | Publication date |
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CN108603984A (zh) | 2018-09-28 |
EP3435127A4 (en) | 2019-04-03 |
US20190064451A1 (en) | 2019-02-28 |
EP3435127A1 (en) | 2019-01-30 |
EP3435127B1 (en) | 2021-06-16 |
JPWO2017163762A1 (ja) | 2019-01-31 |
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