CN104551387A - Multi-beam synthesizing and focusing device - Google Patents
Multi-beam synthesizing and focusing device Download PDFInfo
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- CN104551387A CN104551387A CN201410814855.8A CN201410814855A CN104551387A CN 104551387 A CN104551387 A CN 104551387A CN 201410814855 A CN201410814855 A CN 201410814855A CN 104551387 A CN104551387 A CN 104551387A
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- 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
- B23K26/0604—Shaping the laser beam, e.g. by masks or multi-focusing by a combination of beams
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- 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
- B23K26/04—Automatically aligning, aiming or focusing the laser beam, e.g. using the back-scattered light
- B23K26/046—Automatically focusing the laser beam
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- 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
- B23K26/0648—Shaping the laser beam, e.g. by masks or multi-focusing by means of optical elements, e.g. lenses, mirrors or prisms comprising lenses
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- 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
- B23K26/352—Working by laser beam, e.g. welding, cutting or boring for surface treatment
- B23K26/354—Working by laser beam, e.g. welding, cutting or boring for surface treatment by melting
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- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Laser Beam Processing (AREA)
Abstract
The invention provides a multi-beam synthesizing and focusing device. The multi-beam synthesizing and focusing device comprises a focusing assembly and at least one multi-beam synthesizing assembly; the multi-beam synthesizing assembly is used for synthesizing a plurality of incident light beams in different directions, and comprises at least two lasers, optical fibers and collimators with the same number as that of the lasers, and a deflection assembly; each optical fiber is connected with one laser; each collimator is connected with one optical fiber; the deflection assembly comprises at least one reflecting mirror used for changing the directions of light beams emitted from the collimators; the focusing assembly is used for converging parallel light beams, and comprises a lens frame and a focusing lens which is arranged in the lens frame. According to the multi-beam synthesizing and focusing device, a plurality of light beams in different directions can be synthesized into a plurality of parallel light beams at included angles of 0 to 30 degrees and are converged finally through the focusing lens; micro-pit groups are generated on a roller surface simultaneously or at different times, and roughened areas within a unit time are increased, so that the laser roughening machining speed can be improved; regular and irregular distribution parameters are conveniently set; stripes are not easily generated on a roughened roller surface.
Description
Technical field
The present invention relates to discrete laser process technology, especially a kind of multi-beam synthetic focusing device, is applicable to the fields such as cold roll laser texturing.
Background technology
Cold-reduced sheet has thickness and the advantage such as plate shape precision is high, surface quality good, mechanical property good, thickness is thinner, applies very wide.Cold-reduced sheet is divided into optic panel and texturing plate by roughness.Texturing plate adopts Texturing Surface of Roll smooth, and surface topography is by Texturing Surface of Roll copying surface, and roughness is generally larger.Relative optic panel, texturing plate is because having better percentage elongation and coated layer adhesion, and having extensive use in industries such as automobile, high ferro, Aero-Space, household electrical appliance and packagings for foodstuff, is a kind of indispensable important source material.
Roller texturing technology carries out texturing to polishing roll exactly, makes its surface have the technology of special appearance.The roller texturing technology industrially obtaining large-scale promotion application is at present shot-peening texturing, electric spark texturing and laser roughening, and wherein more advanced is electric spark texturing and laser roughening.
Electric spark texturing is by being immersed in roll and electrode in insulated working liquid or at the gap of two electrodes spray insulated working liquid, two interelectrode gaps are enough little, electrode applies the pulse voltage of certain amplitude and frequency, produce spark discharge, roller surface produces a series of micro-molten micro-hole.
Laser roughening is divided into CO by the laser instrument kind used
2laser roughening and YAG laser roughening.CO
2laser roughening is by continuous CO
2the continuous laser that laser instrument sends, the certain pulse laser of frequency is become through chopper, by along roll mandrel at the uniform velocity moving focus lamp by pulse laser focusing to the roller surface at the uniform velocity rotated, roller surface is melted, gasifies, produce a large amount of molten baths, thus form certain pattern at whole roll surface have the micro-hole of the sclerosis of boss in a large number.YAG laser roughening exports the YAG pulse laser of high-energy-density, high repetition frequency through Q-switch particular modulation by continuous LD pumped YAG lasers, by along roll mandrel at the uniform velocity moving focus lamp by pulse laser focusing to the roller surface at the uniform velocity rotated, roller surface is melted, gasifies, produce a large amount of molten baths; The assist gas of certain ingredients, certain pressure, along certain angle side-blowing bath, makes molten bath boss obvious; Roll self conduction of heat makes molten bath cool and Surface hardened layer rapidly because of fused mass; Thus form certain pattern at whole roll surface have the micro-hole of the sclerosis of boss in a large number.
YAG laser roughening technology is that Inst. of Mechanics, CAS researchs and develops, as patent of invention " high frequency modulation multy-pulse YAG laser engraving design system and processing method " (ZL92113223.9) in the nineties.In order to increase each to the uniformity of micro-hole distribution, regulate each to percentage elongation of cold-reduced sheet, Chinese Academy of Sciences's mechanics develop the two-dimentional controlled distribution technology of YAG laser roughening, as patent of invention " has the surface of roller texturing laser-processing system of controlled distribution texturing point " (ZL 00128273.5).The random distribution in the micro-hole of considerable texturing plate requirement is had in engineering.In order to improve the presentation quality of laser roughening plate, controlled random distribution technique is developed, as patent of invention " the surface of roller texturing laser-processing system of the random texturing point of circumference and method " (ZL200510117158.8) in the basis of Chinese Academy of Sciences's mechanics place two dimension controlled distribution technology; And for example patent of invention " the surface of roller texturing laser-processing system of random deflection texturing point and method " (ZL 200510116750.6).
All more superior than electric spark texturing in the uniformity of laser roughening in micro-hole and repeatability, service condition, environmental pollution, operating cost etc.But electric spark texturing than laser roughening advantageously in process velocity.Same roll, laser roughening needs one hour, and electric spark texturing only may need 20 minutes.For laser roughening, micro-pit density of Texturing Surface of Roll is higher, and when texturing frequency is constant, process velocity is slower.Micro-pit density of present superior automobile plate, appliance plate is more and more higher, urgent process velocity of wishing raising laser roughening.
Electro-discharge Texturing velocity ratio faster reason is that multi-electrode discharges simultaneously.Equally, how micro-hole parallel fabrication is the inevitable choice improving laser roughening process velocity.
General laser roughening, adopts the scheme of separate unit laser instrument, single focus lamp.The scheme of employing multi-station laser, multiple focus lamp obviously can improve texturing speed.The disadvantage of the program is the bad control of micro-hole relative position that multi-station laser produces, and very easily produces fatal interference fringe.Its another shortcoming is that light channel structure is huger, can the quantity of laser instrument simultaneously can be limited.Also the single beam of separate unit laser instrument can be divided into multi-beam, focus on output respectively.Now after beam splitting, the energy of single beam can be limited, and there is correlation the position in its micro-hole produced, also easily goes out striped.
The scheme that after adopting separate unit laser instrument, beam splitting, single focus lamp focuses on also can improve texturing speed, because the multiple micro-hole spacing produced is very near simultaneously, is equivalent to one group of micro-hole, not easily goes out striped.The disadvantage of the program is the energy constraint in single hole, is only suitable for the speed improving low roughness texturing.Its another shortcoming is that the hole spacing in the group of micro-hole is relatively fixing, can not realize random distribution, and the entirety that have impact on texturing roll forming looks improves.
Adopt multi-station laser, close the scheme of the rear single focus lamp focusing of bundle, overcoming the problem of the energy shortage in single hole, should be more satisfactory scheme.Be exclusively used in the semiconductor laser module of CTP (computer to plate), as the CTP laser array image-forming module series of Intense, combine accurate optics and simple and efficient electronic device interface, it has the arrangement of laser emitters of 64 high reliability, and the single-mode laser that each channel interior provides the high reliability of 200mW exports.The disadvantage single beam energy of this device is too low, cannot texturing.Its another shortcoming is that each bundle light relative position is fixed.
Summary of the invention
The invention provides a kind of multi-beam synthetic focusing device, for overcoming defect of the prior art, realizing multi-beam synthesis, improving the process velocity of laser roughening, realize the texturing process of high-energy-density.
The invention provides a kind of multi-beam synthetic focusing device, comprising:
At least one multi-beam synthesis assembly, for being synthesized by the incident light of the above different directions of two bundles, the angle between the light beam after synthesis is between 0 ~ 30 degree; Comprise at least two laser instruments, the collimater be equal to described number of lasers and one deflects assembly; All Fiber connection is passed through between described laser instrument and collimater; Described deflection assembly comprises at least one for changing the speculum of the beam direction via described collimater outgoing;
Focus pack, for converging the light beam after the synthesis of described multi-beam synthesis assembly; Comprise mirror holder and be arranged on the condenser lens in described mirror holder.
Wherein, described multi-beam synthesis assembly also comprises the motor that quantity is equal to described number of mirrors, and each described speculum is installed on a described motor.
Further, described motor is galvanometer motor, stepper motor, piezoelectric motor or servomotor.
Further, all described speculums and all described galvanometer motors are all arranged in housing, are provided with a light pipe between described housing and each described collimater and between described housing and described mirror holder.
Particularly, described housing is positioned on a support, and described galvanometer motor is installed on described support, and interlaced arrangement in vertical direction.
Wherein, described mirror holder is also provided with protective glass, described protective glass is positioned at the side of described condenser lens away from described multi-beam synthesis assembly.
Further, described mirror holder is also provided with the valve for being blown into air-flow near one end of described protective glass, described valve is horn-like, and flared end is connected with described mirror holder, and necking end axially overhangs along it.
Particularly, described multi-beam synthesis assembly is three-beam synthesis assembly, and this three-beam synthesis assembly is used for the incident light of three beams different directions to synthesize, and the angle between the light beam after synthesis is between 0 ~ 30 degree; Wherein a branch of incident light is through condenser lens center, centered by incident beam; Other two bundle incident lights are all vertical with described center incident beam, are normal incident light beam;
This three-beam synthesis assembly comprises three laser instruments, three optical fiber, three collimaters and a deflection assembly; Wherein laser instrument described in is positioned at middle is intermediate laser device, the described collimater be connected with described intermediate laser device is intermediate collimator, it is side laser instrument that laser instrument described in other two is positioned at described intermediate laser device both sides, and the described collimater be connected with described side laser instrument is side collimater;
Described deflection assembly comprises two for changing the speculum in the described normal incident light beam direction via the outgoing of described side collimater.
Wherein, a first multi-beam synthesis assembly and at least one the second multi-beam synthesis assembly is comprised;
Described first multi-beam synthesis assembly is three-beam synthesis assembly; The hot spot that described center incident beam and two normal incident light beam are formed after described condenser lens on focal plane is located along the same line;
Described second multi-beam synthesis assembly is two-beam synthesis assembly, and this two-beam synthesis assembly is used for the incident light of two bundle different directions to synthesize, and the angle between the light beam after synthesis is between 0 ~ 30 degree; Wherein two bundle incident lights are all vertical with described center incident beam, are normal incident light beam; This two-beam synthesis assembly comprises two laser instruments, two optical fiber, two collimaters and a deflection assembly; Wherein laser instrument described in two is positioned at both sides is side laser instrument, and the described collimater be connected with described side laser instrument is side collimater; Described deflection assembly comprises two for changing the speculum in the normal incident light beam direction via the outgoing of described side collimater;
The dual-side collimater of described two-beam synthesis assembly is positioned at the both sides of the intermediate collimator of described three-beam synthesis assembly, and line between the dual-side collimater of described two-beam synthesis assembly and described three-beam synthesize assembly dual-side collimater between line be an angle, this angle is between 0 ~ 180 degree;
All described two-beam synthesis assemblies and described three-beam synthesize intermediate laser device in assembly and intermediate collimator and all can form three-beam and synthesize assembly, and the hot spot that described two-beam is formed after synthesizing the center incident beam line focus lens that two normal incident light beam in assembly and described three-beam synthesize in assembly on focal plane is all located along the same line.
Further, two described second multi-beam synthesis assemblies are comprised;
The angle of the line that the line between the dual-side collimater of two described two-beam synthesis assemblies and described three-beam synthesize between the dual-side collimater of assembly is 60 degree.
Further, three described second multi-beam synthesis assemblies are comprised;
The angle of the line that the line between the dual-side collimater of two-beam synthesis assembly described in one of them and described three-beam synthesize between the dual-side collimater of assembly is 90 degree;
The angle of the line that the line between the dual-side collimater of two-beam synthesis assembly described in two other and described three-beam synthesize between the dual-side collimater of assembly is 45 degree.
Multi-beam synthetic focusing device provided by the invention, laser instrument excites connected fibre optical transmission light beam, these light beams enter speculum after collimating device collimation, direction is changed after speculum reflection, form multi beam collimated light beam, collimated light beam converges after a condenser lens, utilize the light beam after assembling can on roll surface simultaneously or timesharing produce micro-hole group, by controlling the spacing in inner micro-hole in real time, increase the texturing region in the unit interval, and then the process velocity of laser roughening can be improved, and be convenient to the setting of rule and random distributed constant; Monofocal mirror exports, and texturing roll surface not easily produces striped; In the group of micro-hole, micro-hole can be arranged in a straight line along the axis direction of roller, improves the process velocity of laser roughening when spindle speed is limited.
Accompanying drawing explanation
The front view of the multi-beam synthetic focusing device that Fig. 1 provides for the embodiment of the present invention;
Fig. 2 is the top view of Fig. 1;
The hot spot schematic diagram of the three-beam synthetic focusing device synchronism output that Fig. 3 provides for the embodiment of the present invention;
The top view of the multi-beam synthetic focusing device that Fig. 4 provides for the preferred embodiment of the present invention one;
Fig. 5 is the hot spot schematic diagram of the multi-beam synthetic focusing device synchronism output in Fig. 4;
The top view of the multi-beam synthetic focusing device that Fig. 6 provides for the preferred embodiment of the present invention two;
Fig. 7 is the hot spot schematic diagram of the multi-beam synthetic focusing device synchronism output in Fig. 6;
The top view of the multi-beam synthetic focusing device that Fig. 8 provides for the preferred embodiment of the present invention three;
Fig. 9 is the hot spot schematic diagram of the multi-beam synthetic focusing device synchronism output in Fig. 8.
Detailed description of the invention
As shown in Figure 1 and Figure 2, the embodiment of the present invention provides a kind of multi-beam synthetic focusing device, and comprise focus pack and at least one multi-beam synthesis assembly, multi-beam synthesis here refers to light compositing above for two bundles;
Multi-beam synthesis assembly is used for the incident light of the above different directions of two bundles to synthesize, and the angle between the light beam after synthesis is between 0 ~ 30 degree; Comprise at least two laser instrument 18a, the optical fiber 18b be equal to laser instrument 18a quantity, be equal to laser instrument 18a quantity collimater 18c and deflect assembly 20; Each root optical fiber all connects a laser instrument and a collimater, carries out flexible transfer for the light beam launched by laser instrument 18a, and collimater 18c is used for the light beam that collimating optical fibre 18b transmits; Deflection assembly 20 comprises at least one for changing the speculum 29 of the beam direction via collimater 18 outgoing;
Focus pack, converges for the light beam after multi-beam being synthesized assembly synthesis; The condenser lens 24 comprising mirror holder 23 and be arranged in mirror holder 23.
Multi-beam synthesis assembly comprises following several:
If the transmitted beam after collimating device collimation is two bundles, then has at least and a branch ofly change direction through speculum 29; Comprise two kinds of situations:
The first situation: light beam changes direction through speculum 29, another light beam reflection mirror, directly through condenser lens 24 center, only needs a speculum 29; Angle between the light beam reflected through speculum 29 and the light beam at incident condenser lens 24 center is between 0 ~ 30 degree;
The second situation: two-beam all changes direction through speculum 29, needs two speculums 29; Angle between the light beam that speculum 29 reflects is between 0 ~ 30 degree;
If the transmitted beam after collimating device collimation is more than three beams, then two bundles are had at least to change direction through speculum 29; Comprise two kinds of situations:
The first situation: light beam reflection mirror is directly through condenser lens 24 center, and the above light of two bundles changes direction through speculum 29, needs plural speculum 29; Angle between the light beam that speculum 29 reflects is between 0 ~ 30 degree;
The second situation: all light beams all change direction through speculum 29, needs three with upper reflector 29; Angle between the light beam that speculum 29 reflects is between 0 ~ 30 degree;
Multi-beam synthetic focusing device provided by the invention, lasers excites source gives off laser beam, this laser beam is carried out flexible transfer by connected optical fiber, have at least in these laser beams a branch of through collimater 18a collimation after enter speculum 29, direction is changed after speculum 29 reflects, light beam after all reflections or all folded light beams are formed with the light beam directly through condenser lens 24 center synthesizes light beam, angle between synthesis light beam is between 0 ~ 30 degree, synthesis light beam converges after a condenser lens 24, utilize the light beam after converging can roll surface (roll surface can be located on the focal plane of condenser lens 24) upper simultaneously or timesharing produce micro-hole group, by controlling the spacing in inner micro-hole in real time, increase the texturing region in the unit interval, and then the process velocity of laser roughening can be improved, and be convenient to the setting of rule and random distributed constant, monofocal mirror exports, and texturing roll surface not easily produces striped, in the group of micro-hole, micro-hole can be arranged in a straight line along the axis direction of roller, improves the process velocity of laser roughening when machine tool chief axis limited speed.
As shown in Figure 1, multi-beam synthesis assembly also comprises the motor 28 that quantity is equal to speculum 29 quantity, and each speculum 29 is installed on a motor 28.Be connected by shaft coupling 27 between motor 28 with speculum 29.Motor 28 can, according to the angle of the angle adjustment speculum 29 of incident light, make the angle between the folded light beam after all speculums 29 reflect remain between 0 ~ 30 degree.Motor 28 is galvanometer motor, stepper motor, piezoelectric motor or servomotor.
In order to prevent the deep fades of light beam in transmitting procedure, all speculums 29 and all motors 28 are all arranged in housing, are provided with a light pipe between housing and each collimater 18a and between housing and mirror holder 23.Light pipe wherein between intermediate collimator 181 and housing is rear light pipe 19, and the light pipe between side collimater 182 and housing is side light pipe 21, and the light pipe between mirror holder 23 and housing is front light pipe 22.
When the light beam synthesized is more, the speculum 29 of needs and motor 28 are also corresponding more, and in order to avoid interfering with each other in limited space, housing can be located on a support 30, and motor 28 is installed on support 30, and motor 28 interlaced arrangement in vertical direction.Be conducive to like this saving space.
In order to protect condenser lens 24, mirror holder 23 is also provided with protective glass 25, protective glass 25 is positioned at the side of condenser lens 24 away from multi-beam synthesis assembly.
Mirror holder 23 is also provided with the valve 26 for being blown into air-flow near one end of protective glass 25, valve 26 is in horn-like, and valve 26 flared end is connected with mirror holder 23, and valve 26 necking end axially overhangs along it.Valve 26 side has pore 26a, air-flow can blow on roll surface after entering valve 26 by pore, the above-mentioned position relationship of bell-mouthed valve 26 is conducive to strengthening air velocity, after the light beam irradiation after line focus lens 24 converge forms molten bath on roll surface, the air-flow blown out through valve 26 in time by the solution blowout in molten bath, can carry out texturing to roll surface.
Air-flow was introduced before protective glass 25, and gas circuit is coaxial with convergence laser beam, and the air-flow penetrated from valve 26 makes protective glass 25 not contaminated for the dust and splash intercepting laser and metal function.Laser condensing lens (referring to condenser lens 24 here) is one group of compound lens, except by laser beam focus except the effect of surface of the work (roll surface), can also optical aberration be eliminated, reduce the dispersivity of laser beam.
As shown in Figure 2, as the preferred embodiment of above-described embodiment, above-mentioned multi-beam synthesis assembly is three-beam synthesis assembly, and this three-beam synthesis assembly is used for the incident light of three beams different directions to synthesize, and the angle between the light beam after synthesis is between 0 ~ 30 degree; Wherein a branch of incident light is through condenser lens center, centered by incident beam A; Other two bundle incident lights are all vertical with center incident beam A, are normal incident light beam B; This three-beam synthesis assembly comprises three laser instrument 18a, three optical fiber 18b, three collimater 18c and deflection assemblies 20; Wherein a laser instrument is positioned at middle is intermediate laser device, and the collimater be connected with intermediate laser device is intermediate collimator 181, and two-laser is positioned at intermediate laser device both sides is in addition side laser instrument, and the collimater be connected with side laser instrument is side collimater 182; Wherein intermediate laser device sends laser for excitation source, through connected optical fiber flexible transfer, finally after intermediate collimator 181 collimates, sends center incident beam A; Side laser instrument 182 sends laser for excitation source, and warp and its optical fiber flexible transfer be connected separately, finally send normal incident light beam B after side collimater 182 collimates; Deflection assembly comprises two for changing the speculum 29 in the normal incident light beam B direction via side collimater 182 outgoing.
Three-beam synthesis assembly is convenient to the synthesis realizing more multiple beam; The housing of deflection assembly can rotate around the axis of front light pipe 22 and rear light pipe 19 within the specific limits, for adjusting incident angle of light, can use screw lock after having adjusted.The corresponding collimater 18c of every platform laser instrument 18a, connects each other by optical fiber 18b.Incident light exports directional light after collimater 18c, and collimater 18c is threaded connection with deflection assembly, uses screw lock.
By the angle of rotating mirror, the hot spot 100b formed after the hot spot 100a formed after can making center incident beam A line focus lens and two normal incident light beam B line focus lens is located along the same line, multiple micro-hole spacing that simultaneously can produce on roll surface is very near, be equivalent to one group of micro-hole, not easily go out interference fringe, see Fig. 3, three hot spots can also be made to overlap, to realize the texturing process of high-energy-density.
As preferred embodiment, see Fig. 4-9, multi-beam synthetic focusing device comprises a first multi-beam synthesis assembly and at least one the second multi-beam synthesis assembly; The transmitted beam of the first multi-beam synthesis assembly and at least one the second multi-beam synthesis assembly is all assembled by a condenser lens 24, and forms focal beam spot on its focal plane;
First multi-beam synthesis assembly is three-beam synthesis assembly 100; The hot spot 100a formed on focal plane after center incident beam and two normal incident light beam line focus lens 24 is located along the same line;
Second multi-beam synthesis assembly is two-beam synthesis assembly 200, and this two-beam synthesis assembly is used for the incident light of two bundle different directions to synthesize, and the angle between the light beam after synthesis is between 0 ~ 30 degree; Wherein two bundle incident lights are all vertical with center incident beam, are normal incident light beam; This two-beam synthesis assembly comprises two laser instruments, two optical fiber, two collimaters and a deflection assembly; Wherein two-laser is positioned at both sides is side laser instrument, and the collimater be connected with side laser instrument is side collimater 201; Deflection assembly 202 comprises two for changing the speculum in the normal incident light beam direction via the outgoing of side collimater;
The dual-side collimater 201 of two-beam synthesis assembly is positioned at the both sides of the intermediate collimator 181 of three-beam synthesis assembly, and line between the dual-side collimater 201 of two-beam synthesis assembly and three-beam synthesize assembly dual-side collimater 182 between line be an angle, this angle is between 0 ~ 180 degree;
All two-beam synthesis assemblies 200 and three-beam synthesizes intermediate laser device 181 in assembly 100 and intermediate collimator 182 and all can form three-beam and synthesize assembly, and the hot spot 200a that two-beam is formed after synthesizing the center incident beam line focus lens that the hot spot 200a of two normal incident light beam formation in assembly and three-beam synthesize in assembly on focal plane is all located along the same line.Therefore be alternatively the cascade of multiple three-beam synthetic focusing device, and multiple three-beam synthetic focusing device share an intermediate laser device and intermediate collimator.
As preferred embodiment one, see Fig. 4, Fig. 5, angle between line between the dual-side collimater 182 that line between the dual-side collimater 201 of two-beam synthesis assembly 200 and three-beam synthesize assembly 100 is 90 degree, the hot spot 100b that three-beam synthesis assembly normal incident light beam is formed and the hot spot 200a that two-beam synthesis assembly normal incident light beam is formed is positioned on foursquare four angles, and the hot spot 100a that three-beam synthesis assembly center incident beam is formed is positioned at foursquare center; Distribute in regular shape, the hot spot formed relative to the single beam of existing laser instrument considerably increases the density of hot spot, thus the velocity of rotation that can improve roll surface is to improve texturing process speed.
As preferred embodiment two, see Fig. 6, Fig. 7, comprise two two-beam synthesis assemblies 200; The angle of the line that the line between the dual-side collimater 201 of two two-beam synthesis assemblies 200 and three-beam synthesize between the dual-side collimater 182 of assembly 100 is 60 degree.The hot spot 200a that two-beam synthesis assembly 200 normal incident light beam is formed and three-beam synthesizes the hot spot 100a that assembly normal incident light beam formed and are positioned on orthohexagonal six angles, and the hot spot 100a that three-beam synthesizes the formation of assembly center incident beam is positioned at hexagonal center; Effect is with preferred embodiment one.
As preferred embodiment three, see Fig. 8, Fig. 9, comprise three two-beam synthesis assemblies 200; The angle of the line that the line between the dual-side collimater 201 of one of them two-beam synthesis assembly and three-beam synthesize between the dual-side collimater 182 of assembly is 90 degree; The angle of the line that the line between the dual-side collimater 201 of two other two-beam synthesis assembly and three-beam synthesize between the dual-side collimater 182 of assembly is 45 degree.The hot spot 200a that two-beam synthesis assembly normal incident light beam is formed and the hot spot 100b that three-beam synthesis assembly normal incident light beam is formed is positioned on foursquare four angles and the mid point on square four limits, and the hot spot 100a that three-beam synthesis assembly center incident beam is formed is positioned at foursquare center; Effect is with preferred embodiment one.
Claims (10)
1. a multi-beam synthetic focusing device, is characterized in that, comprising:
At least one multi-beam synthesis assembly, for being synthesized by the incident light of the above different directions of two bundles, the angle between the light beam after synthesis is between 0 ~ 30 degree; Comprise at least two laser instruments, the collimater be equal to described number of lasers and one deflects assembly; All Fiber connection is passed through between described laser instrument and collimater; Described deflection assembly comprises at least one for changing the speculum of the beam direction via described collimater outgoing;
Focus pack, for converging the light beam after the synthesis of described multi-beam synthesis assembly; Comprise mirror holder and be arranged on the condenser lens in described mirror holder.
2. multi-beam synthetic focusing device according to claim 1, is characterized in that:
Described multi-beam synthesis assembly also comprises the motor that quantity is equal to described number of mirrors, and each described speculum is installed on a described motor.
3. multi-beam synthetic focusing device according to claim 2, is characterized in that: described motor is galvanometer motor, stepper motor, piezoelectric motor or servomotor;
All described speculums and all described motors are all arranged in housing, are provided with a light pipe between described housing and each described collimater and between described housing and described mirror holder.
4. multi-beam synthetic focusing device according to claim 3, is characterized in that:
Described housing is positioned on a support, and described motor is installed on described support, and interlaced arrangement in vertical direction.
5. multi-beam synthetic focusing device according to claim 4, is characterized in that:
Described mirror holder is also provided with protective glass, and described protective glass is positioned at the side of described condenser lens away from described multi-beam synthesis assembly.
6. multi-beam synthetic focusing device according to claim 5, is characterized in that:
Described mirror holder is also provided with the valve for being blown into air-flow near one end of described protective glass, described valve is horn-like, and flared end is connected with described mirror holder, and necking end axially overhangs along it.
7., according to the arbitrary described multi-beam synthetic focusing device of claim 1-6, it is characterized in that:
Described multi-beam synthesis assembly is three-beam synthesis assembly, and this three-beam synthesis assembly is used for the incident light of three beams different directions to synthesize, and the angle between the light beam after synthesis is between 0 ~ 30 degree; Wherein a branch of incident light is through condenser lens center, centered by incident beam; Other two bundle incident lights are all vertical with described center incident beam, are normal incident light beam;
This three-beam synthesis assembly comprises three laser instruments, three optical fiber, three collimaters and a deflection assembly; Wherein laser instrument described in is positioned at middle is intermediate laser device, the described collimater be connected with described intermediate laser device is intermediate collimator, it is side laser instrument that laser instrument described in other two is positioned at described intermediate laser device both sides, and the described collimater be connected with described side laser instrument is side collimater;
Described deflection assembly comprises two for changing the speculum in the normal incident light beam direction via the outgoing of described side collimater.
8. multi-beam synthetic focusing device according to claim 7, is characterized in that:
Comprise a first multi-beam synthesis assembly and at least one the second multi-beam synthesis assembly;
Described first multi-beam synthesis assembly is three-beam synthesis assembly; The hot spot that described center incident beam and two normal incident light beam are formed after described condenser lens on focal plane is located along the same line;
Described second multi-beam synthesis assembly is two-beam synthesis assembly, and this two-beam synthesis assembly is used for the incident light of two bundle different directions to synthesize, and the angle between the light beam after synthesis is between 0 ~ 30 degree; Wherein two bundle incident lights are all vertical with described center incident beam, are normal incident light beam; This two-beam synthesis assembly comprises two laser instruments, two optical fiber, two collimaters and a deflection assembly; Wherein laser instrument described in two is positioned at both sides is side laser instrument, and the described collimater be connected with described side laser instrument is side collimater; Described deflection assembly comprises two for changing the speculum in the normal incident light beam direction via the outgoing of described side collimater;
The dual-side collimater of described two-beam synthesis assembly is positioned at the both sides of the intermediate collimator of described three-beam synthesis assembly, and line between the dual-side collimater of described two-beam synthesis assembly and described three-beam synthesize assembly dual-side collimater between line be an angle, this angle is between 0 ~ 180 degree;
All described two-beam synthesis assemblies and described three-beam synthesize intermediate laser device in assembly and intermediate collimator and all can form three-beam and synthesize assembly, and the hot spot that described two-beam is formed after synthesizing the center incident beam line focus lens that two normal incident light beam in assembly and described three-beam synthesize in assembly on focal plane is all located along the same line.
9. multi-beam synthetic focusing device according to claim 8, is characterized in that:
Comprise two described second multi-beam synthesis assemblies;
The angle of the line that the line between the dual-side collimater of two described two-beam synthesis assemblies and described three-beam synthesize between the dual-side collimater of assembly is 60 degree.
10. multi-beam synthetic focusing device according to claim 8, is characterized in that:
Comprise three described second multi-beam synthesis assemblies;
The angle of the line that the line between the dual-side collimater of two-beam synthesis assembly described in one of them and described three-beam synthesize between the dual-side collimater of assembly is 90 degree;
The angle of the line that the line between the dual-side collimater of two-beam synthesis assembly described in two other and described three-beam synthesize between the dual-side collimater of assembly is 45 degree.
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