CN105728955B - Focusing lens and laser cutting head thereof - Google Patents
Focusing lens and laser cutting head thereof Download PDFInfo
- Publication number
- CN105728955B CN105728955B CN201610281324.6A CN201610281324A CN105728955B CN 105728955 B CN105728955 B CN 105728955B CN 201610281324 A CN201610281324 A CN 201610281324A CN 105728955 B CN105728955 B CN 105728955B
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- CN
- China
- Prior art keywords
- lens
- condenser lenses
- transmission units
- fused quartz
- purity fused
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Classifications
-
- 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
- B23K26/36—Removing material
- B23K26/38—Removing material by boring or cutting
-
- 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
-
- 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
- B23K26/70—Auxiliary operations or equipment
- B23K26/702—Auxiliary equipment
Abstract
The invention relates to the technical field of laser cutting, and discloses a focusing lens and a laser cutting head. The focusing lens is provided with at least one first transmitting unit and one second transmitting unit, wherein each second transmitting unit is arranged around the outer edge of the corresponding first transmitting unit, and each first transmitting unit is embedded into a middle hollow part of the corresponding second transmitting unit; the first transmitting units and the second transmitting units are respectively made of first optical material and second optical material with different diffraction rates. The laser cutting head comprises at least one focusing lens and a cutting head, wherein each focusing lens is arranged between a laser source of a laser device and the cutting head, and a cutting hole in the tail end of the cutting head is formed in the focal depth of the focusing lens. The focusing lens has the advantages that the focusing depth is increased, and the processing capability of equipment and the slotting processing quality are improved.
Description
Technical field
The present invention relates to laser cutting technique field, more particularly to a kind of condenser lenses and its laser cutting head.
Background technology
In prior art, the cutting head major way of laser instrument is all single multifocal design, and depth of focus is by spot size and Jiao
The short impact of distance, has arrived the limit of design concept.During cutting material, different materials are to hot spot university and focal length length
Require relatively strictly, such as when stainless steel material focus is in material lower surface, cutting effect is more preferable, and carbon steel focus is in material
During material upper surface, cutting effect more preferably, in existing single multifocal design, it is difficult to can conveniently realize different surfaces focus on or
The depth for improving cutting is converged by focus.
In summary, prior art there will naturally be inconvenience and defect in actual use, it is therefore necessary to being improved.
The content of the invention
For above-mentioned defect, it is an object of the invention to provide a kind of condenser lenses and its laser cutting head, Neng Gouzeng
Plus depth of focus length, improve the working ability and joint-cutting crudy of equipment.
To achieve these goals, the present invention provides a kind of condenser lenses, and the condenser lenses are provided with least one first
Transmission units and one second transmission units, second transmission units are looped around the outward flange of first transmission units and described
First transmission units are embedded in the hollow out position in the middle of second transmission units, and first transmission units are saturating with described second
Penetrate unit first optical material and the second optical material of different refractivity is respectively adopted and make.
According to the refractive index of condenser lenses of the present invention, first optical material and second optical material it
Difference is 0.005～0.030, that is, reach focal shift scope for 1～10mm.
According to condenser lenses of the present invention, the condenser lenses are curved surface globe lenss, planoconvex lenss, other focus lamps
Piece or combined focus eyeglass, first transmission units and second transmission units are respectively interior lens and outer lens.
According to condenser lenses of the present invention, the interior lens be curved surface inner cylinder, the outer lens be with it is described
The cylindrical Ring-cylindrical of curved surface that interior lens are adapted, to form light energy distribution of the inside and outside two parts in same focusing system.
According to condenser lenses of the present invention, the interior lens are located at the center of the outer lens, and the interior lens
It is identical with the center of circle of the outer lens, to guarantee bifocal efficient coupling.
According to condenser lenses of the present invention, the outer lens are made up of the material of high-purity fused quartz, the interior lens
It is made up of the material of high-purity fused quartz that adulterates；Or
The outer lens are made up of the material of high-purity fused quartz that adulterates, material system of the interior lens by high-purity fused quartz
Into；Reverse doping controls the situation of refractive index respectively for the outer lens and the interior lens, to improve focusing side-play amount.
According to condenser lenses of the present invention, the material of the high-purity fused quartz of the doping is the high-purity molten of Ge element of adulterating
The material of quartz is improving refractive index.
Or, the material of the high-purity fused quartz of the doping be adulterate fluorine element high-purity fused quartz material to reduce refraction
Rate.
According to condenser lenses of the present invention, the interior lens and the outer lens are formed in one structure.
The present invention also proposes a kind of laser cutting head including the condenser lenses.
Transmission units made by material of the present invention by the setting different refractivity on the condenser lenses, by difference
Refraction difference can produce multiple focal points.Whereby, the present invention can increase depth of focus length, improve the working ability of equipment and cut
Seam crudy.
Description of the drawings
Fig. 1 is the front schematic view of the first embodiment of the condenser lenses of the present invention；
Fig. 2 is the side profile chart of the first embodiment of the condenser lenses of the present invention；
Refraction of light path figures of the Fig. 3 for the first embodiment of prior art；
Refraction of light path figures of the Fig. 4 for second embodiment of prior art；
Fig. 5 is the refraction of light path figure of the first embodiment of the condenser lenses of the present invention；
Fig. 6 is the refraction of light path figure of second embodiment of the condenser lenses of the present invention；
Machining sketch charts of the Fig. 7 for the first embodiment laser cutting head of prior art；
Fig. 8 is the machining sketch chart of the laser cutting head including the first embodiment condenser lens of the present invention.
Specific embodiment
In order that the objects, technical solutions and advantages of the present invention become more apparent, it is below in conjunction with drawings and Examples, right
The present invention is further elaborated.It should be appreciated that specific embodiment described herein is only to explain the present invention, and
It is not used in the restriction present invention.
The condenser lenses 100 of the first embodiment of the present invention are shown by Fig. 1～2, the condenser lenses 100 are provided with
At least one first transmission units and one second transmission units, second transmission units are looped around the outside of the first transmission units
Edge and first transmission units are embedded in the hollow out position in the middle of the second transmission units, first transmission units are saturating with second
Penetrate unit first optical material and the second optical material of different refractivity is respectively adopted and make.Due to its adopt described first
The refractive index difference of optical material and the second optical material can be in first on the condenser lenses when then being irradiated by laser
Transmission units and the second transmission units produce different refracted lights respectively, so as to form respective focal point；Certainly, may be used also
To surround at least one other transmission units outside second transmission units again, and adopt and first optical material and second
The material of optical material different refractivity is made, so as to form multifocal condenser lenses.
The specific refractivity of first optical material and second optical material is 0.005～0.030, that is, reach Jiao
Point deviation range is 1～10mm.In the present embodiment, the specific refractivity of first optical material and the second optical material is
0.02.Experiment shows, variations in refractive index 0.001, then lens focus change about 0.33mm, therefore the specific refractivity of the present embodiment
For 0.02, then lens focus change is about 6.6mm, and the length is the length of the depth of focus of the present embodiment bifocal point focusing.Certainly,
The invention is not limited in that specific refractivity is 0.02, it is also possible to different depths of focus are obtained by changing specific refractivity long
Degree, tackles different cutting processing materials.
The condenser lenses 100 are curved surface globe lenss, planoconvex lenss, other focusing lens or combined focus eyeglass.This reality
Apply in example preferably, the condenser lenses 100 are curved surface globe lenss, including corresponding respectively to first transmission units and the
Lens 11 and an outer lens 12 in the one of two transmission units.
The interior lens 11 are curved surface inner cylinder, and the outer lens 12 are the curved surface outer toroid being adapted with interior lens 11
Cylindricality, to form light energy distribution of the inside and outside two parts in same focusing system.The present embodiment is preferably each using interior outer lens
One, i.e. another outer lens 12 are looped around that the periphery of lens 11 in forms a curved surface globe lenss and the outer lens 12 are than interior
The bore of mirror 11 is much bigger, so that the condenser lenses 100 can form the focusing of bifocal point focusing under the irradiation of laser
Lens.In cutting application, under the conditions of sufficiently strong laser power is reached, increase depth of focus length and can process thicker material
Material.
The interior lens 11 are located at the center of outer lens 12, and the interior lens 11 are identical with the center of circle of outer lens 12, with
Guarantee bifocal efficient coupling.I.e. described interior lens 11 and outer lens 12 are concentric circular, therefore, when laser is radiated at described gathering
When on focus lens 100, the focus for enabling to the interior lens 11 and the generation of outer lens 12 can be converged in the focusing thoroughly
The center of circle of mirror 100 is on the same line so that focusing system is consistent, and bifocuses effectively can be coupled, consequently facilitating laser shape
The cutting of straighe.
In the present embodiment, the outer lens 12 are made up of the material of high-purity fused quartz, and the interior lens 11 are high-purity by adulterating
The material of fused quartz is made.
It is, of course, also possible to be made of material of the outer lens 12 by high-purity fused quartz that adulterates, the interior lens 11 are by height
The material of pure fused quartz is made, and reverse doping controls the situation of refractive index respectively for the outer lens 12 and interior lens 11, to improve
Focus on side-play amount.
The material of the high-purity fused quartz of the doping be adulterate Ge element high-purity fused quartz material to improve refractive index；Or
Person
The material of the high-purity fused quartz of the doping be adulterate fluorine element high-purity fused quartz material to reduce refractive index.
In pure quartz fluorine doped and mix germanium be completely can be with the refractive index of precise control and high-purity fused quartz material positive and negative
In the range of 0.02, the material of high-purity fused quartz of the Ge element that adulterates can improve the refractive index of lens, and the fluorine element that adulterates
The material of high-purity fused quartz can reduce the refractive index of lens, adjust according to actual needs and can obtain the bifocal poly- of needs
Depth of focus, so as to strengthen cut function.
In first embodiment, the material of the high-purity fused quartz of the doping be adulterate fluorine element high-purity fused quartz material,
I.e. interior lens 11 by doping fluorine element high-purity fused quartz material；As shown in figure 5, the refractive index of interior lens 11 is than outer lens 12
Refractive index it is low, then light by the condenser lenses 100 refraction after, through the interior lens 11 refraction light collection Jiao
, i.e. f1 and f2 the distance between the △ remote apart from f2 of the focus of the light collection reflected than the outer lens 12 apart from f1 of point
F is the depth of focus length of the present embodiment, and this can strengthen the thickness of cutting material apart from length compared to the cutting of single focal point.
The present embodiment is preferably the interior lens 11 and the outer lens 12 and is formed in one structure, and its structure is more steady
It is fixed.
Fig. 6 illustrates the condenser lenses 300 of second embodiment of the present invention, the embodiment and the first embodiment of the present invention
Difference be that the interior lens 101 in second embodiment are made up of the material of high-purity fused quartz of doping Ge element, i.e., it is described in
The refractive index of lens 101 is higher than outer lens 102, then light by the condenser lenses 300 refraction after, through the interior lens
Focus f2 of the light collection reflected than the outer lens 102 apart from f1 ' of the focus of the light collection of 101 refractions ' it is near, and
The distance of f1 ' and f2 ' is the depth of focus length of the present embodiment, decides the ability of 300 cutting material thickness of the condenser lenses
Intensity.
Fig. 3～6 are shown respectively first enforcement of prior art first embodiment, prior art second embodiment, the present invention
The light path comparison diagram of example and the second embodiment of the present invention.As illustrated, laser is irradiated to the position on condenser lenses for light
Speckle 10, prior art adopt condenser lenses 200 be all made of using same refractive material, therefore its can be only formed it is single
Focus, plus a collimating lens 201 before the condenser lenses 200 in prior art second embodiment；From Fig. 3 and Fig. 4
As can be seen that due to producing a focus, therefore the point for cutting is confined to the position of the focus, and Fig. 5 and Fig. 6 present invention
Depth of focus length △ f between the bifocuses of two embodiment generations, can solve the problem that the limitation of single focus in prior art, makes
The position that must be cut can be in the range of the depth of focus, so as to strengthen the ability of the cutting material of product.
The present invention also proposes a kind of laser cutting head including above-mentioned condenser lenses, and the laser cutting head is connected with laser instrument
Connect, include condenser lenses and a cutting head at least described in one, the condenser lenses located at the laser instrument LASER Light Source with
Between the cutting head, and the cutting hole of the end of the cutting head is on the depth of focus of the condenser lenses.Such as Fig. 7～8
The action effect figure of prior art and the first embodiment of the laser cutting head of the present invention, the condenser lenses of prior art are shown
200 on cutting head 13, is the first cutting material 141, as can be seen from Figure 7, due to existing skill under the cutting head 13
The condenser lenses 200 of art can only produce single focal point, thus its material thickness that can be cut has certain limitation；And
Fig. 8 illustrates the laser cutting head of the condenser lenses of the first embodiment of the invention, the condenser lenses 100 located at cutting head 13 it
On, it is the second cutting material 142 under the cutting head 13, under the laser intensity of same intensity, due to two kinds of laser light
Different refractive materials and produce two focuses, the depth of focus formed between bifocuses enable to cutting more effectively, and cut material
The thickness of material is bigger.
In sum, transmission made by material of the present invention by the setting different refractivity on the condenser lenses is single
Unit, can produce multiple focal points by different refraction differences.Whereby, the present invention can increase depth of focus length, improve adding for equipment
Work ability and joint-cutting crudy.
Certainly, the present invention can also have other various embodiments, in the case of without departing substantially from spirit of the invention and its essence, ripe
Know those skilled in the art and work as and various corresponding changes and deformation, but these corresponding changes and change can be made according to the present invention
Shape should all belong to the protection domain of appended claims of the invention.
Claims (8)
1. a kind of condenser lenses, it is characterised in that the condenser lenses are provided with least one first transmission units and one second saturating
Unit is penetrated, second transmission units are looped around the outward flange of first transmission units and first transmission units are embedded in
Hollow out position in the middle of second transmission units, first transmission units are respectively adopted different from second transmission units
First optical material and the second optical material of refractive index is made；
The condenser lenses are curved surface globe lenss, planoconvex lenss, other focusing lens or combined focus eyeglass, and described first transmits
Unit and second transmission units are respectively interior lens and outer lens；
The interior lens are curved surface inner cylinder, and the outer lens are the cylindrical Ring-cylindrical of curved surface being adapted with the interior lens,
To form light energy distribution of the inside and outside two parts in same focusing system.
2. condenser lenses according to claim 1, it is characterised in that first optical material and the second optics material
The specific refractivity of material is 0.005～0.030, that is, reach focal shift scope for 1～10mm.
3. condenser lenses according to claim 1, it is characterised in that the interior lens are located at the center of the outer lens,
And the interior lens are identical with the center of circle of the outer lens, to guarantee bifocal efficient coupling.
4. condenser lenses according to claim 1, it is characterised in that material system of the outer lens by high-purity fused quartz
Into the interior lens are made up of the material of high-purity fused quartz that adulterates；Or
The outer lens are made up of the material of high-purity fused quartz that adulterates, and the interior lens are made up of the material of high-purity fused quartz；Institute
State outer lens and the interior lens inversely adulterate respectively and control the situation of refractive index, to improve focusing side-play amount.
5. condenser lenses according to claim 4, it is characterised in that the material of the high-purity fused quartz of the doping is doped germanium
The material of high-purity fused quartz of element is improving refractive index.
6. condenser lenses according to claim 4, it is characterised in that the material of the high-purity fused quartz of the doping is doping fluorine
The material of high-purity fused quartz of element is reducing refractive index.
7. condenser lenses according to claim 1, it is characterised in that the interior lens are formed in one with the outer lens
Structure.
8. a kind of laser cutting head including the condenser lenses as described in any one of claim 1～7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610281324.6A CN105728955B (en) | 2016-04-29 | 2016-04-29 | Focusing lens and laser cutting head thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610281324.6A CN105728955B (en) | 2016-04-29 | 2016-04-29 | Focusing lens and laser cutting head thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105728955A CN105728955A (en) | 2016-07-06 |
| CN105728955B true CN105728955B (en) | 2017-04-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610281324.6A Active CN105728955B (en) | 2016-04-29 | 2016-04-29 | Focusing lens and laser cutting head thereof |
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Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100489587C (en) * | 2005-01-28 | 2009-05-20 | 鸿富锦精密工业（深圳）有限公司 | Variable refractivity lens module |
| KR20070107845A (en) * | 2006-05-04 | 2007-11-08 | 엘지이노텍 주식회사 | Camera lens decreasing aberration |
| EP1944808A1 (en) * | 2007-01-15 | 2008-07-16 | Stmicroelectronics Sa | Optical imaging module designed to be associated with an optical semi-conductor component and method for manufacturing same |
| KR20120128985A (en) * | 2011-05-18 | 2012-11-28 | 엘지이노텍 주식회사 | Refractive index variable lens and camera module using the same |
| CN103712157A (en) * | 2012-09-29 | 2014-04-09 | 欧司朗股份有限公司 | Lens and manufacturing method thereof |
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