CN207965372U - One kind being continuously adjusted focus on light beam angle of divergence optical system based on axicon lens - Google Patents
One kind being continuously adjusted focus on light beam angle of divergence optical system based on axicon lens Download PDFInfo
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- CN207965372U CN207965372U CN201820466850.4U CN201820466850U CN207965372U CN 207965372 U CN207965372 U CN 207965372U CN 201820466850 U CN201820466850 U CN 201820466850U CN 207965372 U CN207965372 U CN 207965372U
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- axicon lens
- anaberration
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- 230000003287 optical effect Effects 0.000 title claims abstract description 37
- 239000000463 material Substances 0.000 claims description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 239000005350 fused silica glass Substances 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 abstract description 18
- 239000013307 optical fiber Substances 0.000 abstract description 11
- 239000007787 solid Substances 0.000 abstract description 7
- 230000008859 change Effects 0.000 abstract description 4
- 238000003698 laser cutting Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
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- 230000008901 benefit Effects 0.000 description 3
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- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
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Abstract
The utility model discloses one kind being continuously adjusted focus on light beam angle of divergence optical system based on axicon lens, including anaberration collimation microscope group, the first axicon lens, the second axicon lens and the anaberration of sequence arrangement focus microscope group from the object side to image side；Wherein, it is circular eyeglass that anaberration collimation microscope group, first axicon lens, second axicon lens and the anaberration, which focus microscope group, and light shaft coaxle；The cone angle of first axicon lens is identical as the cone angle of the second axicon lens, and apex angle is opposite or places in opposite directions.It is provided by the utility model that solid light beam is converted to by hollow circular light beam using double-disk axicon lens based on the continuously adjustable focus on light beam angle of divergence optical system of axicon lens, change the focus on light beam angle of divergence by adjusting the first axicon lens and the second axicon lens spacing, change focused spot position by adjusting anaberration focusing microscope group, it cuts and applies suitable for high power optical fibre laser, the cutting speed and quality of medium-thick plate can be substantially improved.
Description
Technical field
The utility model is related to high power laser light cutting technique fields, and more specifically, the utility model is related to a kind of bases
It is continuously adjusted focus on light beam angle of divergence optical system in axicon lens.
Background technology
Laser processing technology covers a variety of laser processing technologies such as laser cutting, welding, quenching, punching, micro Process, profit
With the fundamental characteristics of high-order harmonics spectrum.Due to laser beam and the untouchable of rapidoprint, process velocity and matter
The advantages such as amount, it is a kind of new and high technology that can not be substituted to have established laser processing technology.
Present laser cutting accounts for entirely laser machining the main status of industry, wherein again headed by optical-fiber laser is cut
It wants.Optical fiber laser other than good beam quality, have due to optical fiber flexibility and to near-infrared light beam couple well it is defeated
Go out so that optical fiber laser occupation rate of market becomes increasingly conspicuous.Optical fiber laser multikilowatt has been quite universal at present, and myriawatt grade swashs
Light device also gradually shows market, even ten myriawatt grades also this life, all kinds of processing technologys of optical-fiber laser is allowed all the more to generalize.
Optical laser cutting head is generally fixed-focus cutting head, that is, collimating mirror focal length is fixed with focus lamp focal length, is passed through
The focus lamp mode of different focal length is changed to realize the cutting of different-thickness plank.But with the increase of laser power, ZOOM light
System is also gradually applied on optical laser cutting head, and one of reason is the plank for different-thickness, material, theoretically right
Answer one group of best focus configuration and cutting technique, in a manner of replacing focus lamp, usual effect and not up to best, ZOOM light
The appearance of system realizes the case where a set of light path replaces multigroup lens combination.
It is well known that the cutting for medium-thick plate, generally use defocus cutting technique, for example, in thick carbon steel using just from
Burnt processing method, middle thickness stainless steel is then using negative defocus processing method, and under normal conditions, defocusing amount is not small, often exceeds
Focus on light beam depth of focus scope.When one of reason is that plank is thicker, near focal point hot spot is smaller, and joint-cutting is too thin, cutting gas or
Auxiliary gas can not reach predictive role to plank completely in cutting process, so that cutting section difference or can not cut etc. existing
As occurring.For ZOOM optical systems, the cutting of medium-thick plate is also restricted by above-mentioned technique, in other words, ZOOM optics
Although system has a focus spot size continuously adjustable, but in use it is main be still utilized the focus on light beam angle of divergence it is adjustable this
One characteristic.
In addition, solid Gauss or Gaussian-Like beam, since central energy density is higher, the relatively low phenomenon of edge fluence is made
Use the solid light spot edge energy density of same size on plank there is no ring-shaped light spot edge fluences high, cutting speed
Also can be relatively limited, this TRUMPF etc. is based on to propose that ring-shaped light spot cutting scheme, cutting speed have with quality under fixed-focus system
Further promoted, but focus on light beam can not carry out angle of divergence adjusting, and there are eyeglasses to be used interchangeably wind in laser beam perforation
The defects of dangerous.
Utility model content
One purpose of the utility model is to solve at least the above, and provide the advantages of at least will be described later.
The utility model is adjustable there is provided a kind of angle of divergence of focus on light beam there are one purpose and focused spot position
It is adjustable to be continuously adjusted focus on light beam angle of divergence optical system based on axicon lens suitable for high power optical fibre laser cutting application
System.
To achieve the goals above, the utility model discloses one kind being continuously adjusted focus on light beam diverging based on axicon lens
Angle optical system, including the anaberration collimation microscope group of sequence arrangement, the first axicon lens, the second axicon lens from the object side to image side
And anaberration focuses microscope group；
Wherein, the anaberration collimation microscope group, first axicon lens, second axicon lens and the picture that disappears
It is circular eyeglass that difference, which focuses microscope group, and light shaft coaxle；
The cone angle of first axicon lens is identical as the cone angle of the second axicon lens, and first axicon lens
Apex angle it is opposite with the apex angle of the second axicon lens or opposite place.
Preferably, the anaberration collimation microscope group is that anaberration spherical surface collimates microscope group, and it is to disappear that the anaberration, which focuses microscope group,
Aberration spherical surface focusing microscope group.
Preferably, first axicon lens are fixed, between second axicon lens and first axicon lens
Spacing is adjustable, realizes that beam divergence angle is adjusted after focusing.
Preferably, the anaberration focuses the focal length of microscope group more than the focal length of anaberration collimation microscope group, the picture that disappears
The spacing that difference focuses between microscope group and anaberration collimation microscope group is adjustable.The anaberration focusing microscope group focal length is longer and along light
Axis is continuously adjustable, realizes that focused spot position is adjusted.
Preferably, anaberration collimation microscope group, first axicon lens, second axicon lens and described disappear
It is fused silica material that aberration, which focuses microscope group,.
The utility model includes at least following advantageous effect：
1, the structure provided by the utility model that focus on light beam angle of divergence optical system is continuously adjusted based on axicon lens is set
Meter is novel, and solid light beam is converted to hollow circular light beam using double-disk axicon lens, by adjust the first axicon lens with
The second axicon lens spacing changes the focus on light beam angle of divergence, and focusing microscope group by adjusting anaberration changes focused spot position
It sets, is suitable for high power optical fibre laser cutting application, it can be big especially with respect to traditional fixed-focus optical system and ZOOM optical systems
Width promotes the cutting speed and quality of medium-thick plate.
2, the second axis provided by the utility model that focus on light beam angle of divergence optical system is continuously adjusted based on axicon lens
Axicon lens is continuously adjusted relative to the first axicon lens on optical axis, and adjustable range and angle of divergence variation are linear, are not required to
The software program of complexity is wanted to be controlled, while the variation of the focus on light beam angle of divergence and focused spot variation are independences,
Two groups of adjusting eyeglasses are independent of each other, and greatly simplify eyeglass driving difficulty.
3, the focusing light provided by the utility model that focus on light beam angle of divergence optical system is continuously adjusted based on axicon lens
Beam is in focus and nearby solid hot spot, can in cut deal laser cutting process for ring-shaped light spot after defocus certain distance
It is quickly perforated to plank using focus spot, reuses defocused spot and high-speed cutting is carried out to plank, therefore perforate and cut
The two is cut to get both.
Part is illustrated to embody by the further advantage, target and feature of the utility model by following, and part will also pass through
Research and practice to the utility model and be understood by the person skilled in the art.
Description of the drawings
Fig. 1 is the optics described in the utility model that focus on light beam angle of divergence optical system is continuously adjusted based on axicon lens
The sectional view of element arrangement.
Fig. 2 is the light beam described in the utility model that focus on light beam angle of divergence optical system is continuously adjusted based on axicon lens
The sectional view of transmission process.
Fig. 3 is the focusing described in the utility model that focus on light beam angle of divergence optical system is continuously adjusted based on axicon lens
The schematic diagram that beam divergence angle is adjusted.
Fig. 4 is the focusing described in the utility model that focus on light beam angle of divergence optical system is continuously adjusted based on axicon lens
The schematic diagram that focal position is adjusted.
Specific implementation mode
The utility model is described in further detail with reference to the accompanying drawings and embodiments, to enable those skilled in the art
It can implement according to this with reference to specification word.
It should be appreciated that such as " having ", "comprising" and " comprising " term used herein are not precluded one or more
The presence or addition of a other elements or combinations thereof.
As shown in Figure 1, provided by the utility model a kind of based on the continuously adjustable focus on light beam angle of divergence optics of axicon lens
System, including anaberration collimation microscope group 1, the first axicon lens 2, the second axicon lens 3 and anaberration focus microscope group 4.Wherein,
Anaberration collimation microscope group 1, the first axicon lens 2, the second axicon lens 3 and anaberration focus microscope group 4 be circular eyeglass and
Light shaft coaxle, anaberration collimation microscope group 1 can be replaced anaberration spherical surface collimation microscope group, and anaberration, which focuses microscope group 4 and can be replaced, to disappear
Aberration spherical surface focusing microscope group, the first axicon lens 2 are identical as 3 cone angle of the second axicon lens and apex angle is opposite or places in opposite directions.
In the utility model, first axicon lens 2 are fixed, 32 spacing of opposite first axicon lens of the second axicon lens
It is continuously adjustable, realize that beam divergence angle is adjusted after focusing.
In the utility model, anaberration collimation 1 focal length of microscope group is shorter, and it is longer that the anaberration focuses 4 focal length of microscope group
And it is continuously adjustable along optical axis, realize that focused spot position is adjusted.
In the utility model, the anaberration collimation microscope group 1, the first axicon lens 2, the second axicon lens 3 and the picture that disappears
It is fused silica material that difference, which focuses 4 material of microscope group,.
The beam Propagation process of optical system described in the utility model is as shown in Figure 2：Go out in high-capacity optical fiber laser
Under 5 normal incidence of luminous point, divergent beams collimate microscope group 1 by anaberration, realize the collimation of incident beam, to which incident beam is accurate
It is directly collimated light beam, after the first axicon lens 2, the annular beam dissipated afterwards is first converged in formation for collimated light beam incidence, annular
Light beam inner and outer diameter difference is constant, and diverging annular beam obtains parallel annular beam using the second axicon lens 3, finally by the picture that disappears
Difference focuses the focusing of microscope group 4 and forms focused spot 6, and hot spot is solid Gaussian spot at focused spot 6, before and after defocus certain distance then
For ring-shaped light spot.
As shown in figure 3, optical system described in the utility model can realize the adjusting of the focus on light beam angle of divergence, specifically
For：On the basis of Fig. 2 optical transmission properties, the second axicon lens 3 are moved along optical axis, realizes and is put down after the second axicon lens 3
Row annular beam outer diameter is adjusted, but internal-and external diameter difference is constant, and so focusing microscope group 4 by anaberration focuses, and realizes focus on light beam
The variation of the angle of divergence；Comparison diagram 2 moves the second axis in Fig. 3 along the direction of optical axis towards the direction for focusing microscope group 4 close to anaberration
Axicon lens 3 makes the angle of the focus on light beam angle of divergence become larger.
As shown in figure 4, optical system described in the utility model can realize the adjusting of focused spot position, specially：
It on the basis of Fig. 3, moves anaberration along optical axis and focuses microscope group 4, focused spot 6 moves, and focused spot is to anaberration
Microscope group 4 is focused apart from constant, the position for so realizing focused spot 6 is adjusted.Comparison diagram 3, along the direction court of optical axis in Fig. 4
It the direction movement anaberration far from the second axicon lens 3 and focuses microscope group 4, to change the position of focused spot 6.
Solid light beam is converted to hollow circular light by the utility model novel in structural design using double-disk axicon lens
Beam changes the focus on light beam angle of divergence by adjusting the first axicon lens 2 and 3 spacing of the second axicon lens, by adjusting the picture that disappears
Difference focuses the position of microscope group 4 to change focused spot position, is suitable for high power optical fibre laser cutting application, especially with respect to biography
The cutting speed and quality of medium-thick plate can be substantially improved in system fixed-focus optical system and ZOOM optical systems.
It is not only in the description and the implementation although the embodiments of the present invention have been disclosed as above
Listed utilization, it can be applied to various fields suitable for the present invention completely, for those skilled in the art,
Other modifications may be easily implemented, therefore without departing from the general concept defined in the claims and the equivalent scope, this reality
It is not limited to specific details and legend shown and described herein with novel.
Claims (5)
1. one kind being continuously adjusted focus on light beam angle of divergence optical system based on axicon lens, which is characterized in that including from object side to
Anaberration collimation microscope group, the first axicon lens, the second axicon lens and the anaberration of image side sequence arrangement focus microscope group；
Wherein, the anaberration collimation microscope group, first axicon lens, second axicon lens and the anaberration are poly-
Burnt microscope group is circular eyeglass, and light shaft coaxle；
The cone angle of first axicon lens is identical as the cone angle of the second axicon lens, and the top of first axicon lens
Angle is opposite with the apex angle of the second axicon lens or places in opposite directions.
2. it is according to claim 1 a kind of based on the continuously adjustable focus on light beam angle of divergence optical system of axicon lens, it is special
Sign is that the anaberration collimation microscope group is that anaberration spherical surface collimates microscope group, and it is anaberration spherical surface that the anaberration, which focuses microscope group,
Focus microscope group.
3. it is according to claim 1 a kind of based on the continuously adjustable focus on light beam angle of divergence optical system of axicon lens, it is special
Sign is that first axicon lens are fixed, and the spacing between second axicon lens and first axicon lens is adjustable.
4. it is according to claim 1 a kind of based on the continuously adjustable focus on light beam angle of divergence optical system of axicon lens, it is special
Sign is that the focal length that the anaberration focuses microscope group is more than the focal length that the anaberration collimates microscope group, the anaberration focus lamp
The position of group can be adjusted along optical axis.
5. it is according to claim 1 a kind of based on the continuously adjustable focus on light beam angle of divergence optical system of axicon lens, it is special
Sign is that the anaberration collimation microscope group, first axicon lens, second axicon lens and the anaberration focus
Microscope group is fused silica material.
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| CN201820466850.4U CN207965372U (en) | 2018-04-03 | 2018-04-03 | One kind being continuously adjusted focus on light beam angle of divergence optical system based on axicon lens |
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| CN201820466850.4U CN207965372U (en) | 2018-04-03 | 2018-04-03 | One kind being continuously adjusted focus on light beam angle of divergence optical system based on axicon lens |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116893525A (en) * | 2023-09-07 | 2023-10-17 | 清华大学 | Far-field super-resolution optical system, laser manufacturing system and imaging analysis system |
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2018
- 2018-04-03 CN CN201820466850.4U patent/CN207965372U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116893525A (en) * | 2023-09-07 | 2023-10-17 | 清华大学 | Far-field super-resolution optical system, laser manufacturing system and imaging analysis system |
| CN116893525B (en) * | 2023-09-07 | 2023-12-15 | 清华大学 | Far-field super-resolution optical system, laser manufacturing system and imaging analysis system |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: No. 8 Dongbao Road, Songjiang District, Shanghai, 2016 Patentee after: Jiaqiang (Shanghai) Intelligent Technology Co.,Ltd. Country or region after: China Address before: 201615 room 304-1, building 5, 1158 Zhongxin Road, Songjiang District, Shanghai Patentee before: SHANGHAI EMPOWER AUTOMATION TECHNOLOGY Co.,Ltd. Country or region before: China |