CN105728955A - Focusing lens and laser cutting head thereof - Google Patents
Focusing lens and laser cutting head thereof Download PDFInfo
- Publication number
- CN105728955A CN105728955A CN201610281324.6A CN201610281324A CN105728955A CN 105728955 A CN105728955 A CN 105728955A CN 201610281324 A CN201610281324 A CN 201610281324A CN 105728955 A CN105728955 A CN 105728955A
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- CN
- China
- Prior art keywords
- lens
- transmission units
- condenser lens
- fused quartz
- purity fused
- Prior art date
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Classifications
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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
- B23K26/36—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
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Optics & Photonics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Laser Beam Processing (AREA)
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, particularly relate to a kind of condenser lens and laser cutting head thereof.
Background technology
In prior art, the cutting head major way of laser instrument is all single multifocal design, and depth of focus is affected by spot size and focal length length, has arrived the limit of design concept.In cutting material process, hot spot university and focal length length are required stricter by different materials, such as, when stainless steel material focus is in material lower surface, cutting effect is better, and carbon steel focus is when being in material upper surface, cutting effect is better, in existing single multifocal design, is difficult to conveniently realize different surfaces and focuses on or converged the degree of depth improving cutting by focus.
In summary, prior art there will naturally be inconvenience and defect in actual use, it is therefore necessary to improved.
Summary of the invention
For above-mentioned defect, it is an object of the invention to provide a kind of condenser lens and laser cutting head thereof, by increasing capacitance it is possible to increase depth of focus length, improve working ability and the joint-cutting crudy of equipment.
To achieve these goals, the present invention provides a kind of condenser lens, described condenser lens is provided with at least one first transmission units and one second transmission units, described second transmission units is looped around the outward flange of described first transmission units and described first transmission units is embedded in the hollow out position in the middle of described second transmission units, and described first transmission units and described second transmission units are respectively adopted the first optical material of different refractivity and the second optical material is made.
According to condenser lens of the present invention, the specific refractivity of described first optical material and described second optical material is 0.005～0.030, namely reaches focal shift and ranges for 1～10mm.
According to condenser lens of the present invention, described condenser lens is curved surface globe lens, planoconvex lens, other focusing lens or combined focus eyeglass, and described first transmission units and described second transmission units be interior lens and outer lens respectively.
According to condenser lens of the present invention, described interior lens are curved surface inner cylinder, and described outer lens is the curved surface outer toroid cylindricality suitable with described interior lens, to form the inside and outside two parts light energy distribution in same focusing system.
According to condenser lens of the present invention, described interior lens are located at the center of described outer lens, and described interior lens are identical with the center of circle of described outer lens, to guarantee bifocal efficient coupling.
According to condenser lens of the present invention, described outer lens is made up of the material of high-purity fused quartz, and described interior lens are made up of the material of high-purity fused quartz that adulterates；Or
Described outer lens is made up of the material of high-purity fused quartz that adulterates, and described interior lens are made up of the material of high-purity fused quartz；The reverse doping respectively of described outer lens and described interior lens controls the situation of refractive index, to improve focusing side-play amount.
According to condenser lens of the present invention, the material of the high-purity fused quartz of described doping is that the material of high-purity fused quartz of doped germanium element is to improve refractive index.
Or, the material of the high-purity fused quartz of described doping is that the material of high-purity fused quartz of doped with fluorine element is to reduce refractive index.
According to condenser lens of the present invention, described interior lens and described outer lens are formed in one structure.
The present invention also proposes a kind of laser cutting head including described condenser lens.
The present invention, by arranging the transmission units made with the material of different refractivity on described condenser lens, can be produced multiple focal point by different refraction differences.Whereby, the present invention can increase depth of focus length, improves working ability and the joint-cutting crudy of equipment.
Accompanying drawing explanation
Fig. 1 is the front schematic view of the first embodiment of the condenser lens of the present invention；
Fig. 2 is the side profile chart of the first embodiment of the condenser lens of the present invention；
Fig. 3 is the refraction of light path figure of the first embodiment of prior art；
Fig. 4 is the refraction of light path figure of the second embodiment of prior art；
Fig. 5 is the refraction of light path figure of the first embodiment of the condenser lens of the present invention；
Fig. 6 is the refraction of light path figure of the second embodiment of the condenser lens of the present invention；
Fig. 7 is the machining sketch chart of 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.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain the present invention, is not intended to limit the present invention.
The condenser lens 100 of the first embodiment of the present invention is shown by Fig. 1～2, described condenser lens 100 is provided with at least one first transmission units and one second transmission units, described second transmission units is looped around the outward flange of the first transmission units and described first transmission units is embedded in the hollow out position in the middle of the second transmission units, and described first transmission units and the second transmission units are respectively adopted the first optical material of different refractivity and the second optical material is made.The first transmission units on described condenser lens and the second transmission units different refraction light can be produced respectively, thus forming respective focal point when then being irradiated by laser owing to the refractive index of its described first optical material adopted and the second optical material is different；It is, of course, also possible to again around other transmission units at least one outside described second transmission units, and the material of employing and described first optical material and the second optical material different refractivity is made, thus multifocal condenser lens can be formed.
The specific refractivity of described first optical material and described second optical material is 0.005～0.030, namely reaches focal shift and ranges for 1～10mm.In the present embodiment, the specific refractivity of described first optical material and the second optical material is 0.02.Experiments show that, variations in refractive index 0.001, then lens focus changes about 0.33mm, and therefore the specific refractivity of the present embodiment is 0.02, then lens focus change is about 6.6mm, and this length is the length of the depth of focus that the present embodiment bifocus focuses on.Certainly, the invention is not limited in that specific refractivity is 0.02, it is also possible to obtain different depth of focus length by changing specific refractivity, tackle different cutting processing materials.
Described condenser lens 100 is curved surface globe lens, planoconvex lens, other focusing lens or combined focus eyeglass., described condenser lens 100 is curved surface globe lens in the present embodiment preferably, including correspond respectively to described first transmission units and the second transmission units one in lens 11 and an outer lens 12.
Described interior lens 11 are curved surface inner cylinder, and described outer lens 12 is the curved surface outer toroid cylindricality suitable with interior lens 11, to form the inside and outside two parts light energy distribution in same focusing system.The present embodiment is preferably each one of outer lens in adopting, what namely another outer lens 12 was looped around in one lens 11 peripheral forms a curved surface globe lens and described outer lens 12 is more much bigger than the bore of interior lens 11, so that described condenser lens 100 can form the condenser lens of bifocus focusing under the irradiation of laser.In cutting application, when reaching sufficiently strong laser power when, increase depth of focus length and can process thicker material.
Described interior lens 11 are located at the center of outer lens 12, and described interior lens 11 are identical with the center of circle of outer lens 12, to guarantee bifocal efficient coupling.Namely described interior lens 11 are concentric circular with outer lens 12, therefore, when laser is radiated on described condenser lens 100, the focus enabling to described interior lens 11 and outer lens 12 generation can converge in the center of circle with described condenser lens 100 on the same line, make focusing system consistent, bifocus can effectively couple, consequently facilitating laser forms straight cutting.
In the present embodiment, described outer lens 12 is made up of the material of high-purity fused quartz, and described interior lens 11 are made up of the material of high-purity fused quartz that adulterates.
It is, of course, also possible to be that described outer lens 12 is made up of the material of high-purity fused quartz that adulterates, described interior lens 11 are made up of the material of high-purity fused quartz, and the reverse doping respectively of described outer lens 12 and interior lens 11 controls the situation of refractive index, to improve focusing side-play amount.
The material of the high-purity fused quartz of described doping is that the material of high-purity fused quartz of doped germanium element is to improve refractive index；Or
The material of the high-purity fused quartz of described doping is that the material of high-purity fused quartz of doped with fluorine element is to reduce refractive index.
Fluorine doped and to mix germanium be can accurately control refractive index with high-purity fused quartz material completely in the scope of positive and negative 0.02 in pure quartz, the material of high-purity fused quartz of doped germanium element can improve the refractive index of lens, and the material of high-purity fused quartz of doped with fluorine element can reduce the refractive index of lens, regulate the bifocal focusing depth of focus that can obtain needing according to actual needs, thus strengthening cut function.
In first embodiment, the material of the high-purity fused quartz of described doping is the material of high-purity fused quartz of doped with fluorine element, and in namely, lens 11 are by the material of high-purity fused quartz of doped with fluorine element；As shown in Figure 5, the refractive index of the refractive index ratio outer lens 12 of interior lens 11 is low, then light is by after the refraction of described condenser lens 100, remote through the distance f2 of the focus of the distance f1 of the focus of the light collection of the described interior lens 11 refraction light collection reflected than described outer lens 12, namely the distance △ f between f1 and f2 is the depth of focus length of the present embodiment, and this distance length can strengthen the thickness of cutting material compared to single focal point cutting.
The present embodiment preferably described interior lens 11 and described outer lens 12 are formed in one structure, and its structure is more stable.
Fig. 6 illustrates the condenser lens 300 of the second embodiment of the present invention, this embodiment and the first embodiment of the present invention are distinctive in that, interior lens 101 in second embodiment are made up of the material of high-purity fused quartz of doped germanium element, namely the refractive index ratio outer lens 102 of described interior lens 101 is high, then light is by after the refraction of described condenser lens 300, near through the focus f2 ' of the distance f1 ' of the focus of the light collection of the described interior lens 101 refraction light collection reflected than described outer lens 102, and the distance of f1 ' and f2 ' is the depth of focus length of the present embodiment, decide the competency degree of described condenser lens 300 cutting material thickness.
Fig. 3～6 are shown respectively the light path comparison diagram of prior art first embodiment, prior art the second embodiment, the first embodiment of the present invention and the second embodiment of the present invention.As shown in the figure, it is hot spot 10 that laser is irradiated to the position on condenser lens, the condenser lens 200 that prior art adopts is all adopt same refractive material to make, therefore it can be only formed single focus, plus a collimating lens 201 before described condenser lens 200 in prior art the second embodiment；Can be seen that from Fig. 3 and Fig. 4, due to producing a focus, therefore the point cut is confined to the position of this focus, and the depth of focus length △ f between the bifocus of the two of Fig. 5 and Fig. 6 present invention embodiment generations, can solve the problem that the limitation of single focus in prior art, make cutting position can in the scope of this depth of focus, thus strengthening the ability of the cutting material of product.
The present invention also proposes a kind of laser cutting head including above-mentioned condenser lens, described laser cutting head is connected with laser instrument, include at least one described condenser lens and a cutting head, described condenser lens is located between the LASER Light Source of described laser instrument and described cutting head, and the cutting hole of the end of described cutting head is located on the depth of focus of described condenser lens.As Fig. 7～8 illustrate the action effect figure of prior art and the first embodiment of the laser cutting head of the present invention, the condenser lens 200 of prior art is located on cutting head 13, it it is the first cutting material 141 under described cutting head 13, as can be seen from Figure 7, owing to the condenser lens 200 of prior art can only produce single focal point, thus its material thickness that can cut has certain limitation；And Fig. 8 illustrates the laser cutting head of condenser lens of the first embodiment of the present invention, described condenser lens 100 is located on cutting head 13, it it is the second cutting material 142 under described cutting head 13, under the laser intensity of same intensity, two focuses are produced due to two kinds of different refractive materials of laser light, the depth of focus formed between bifocus enables to cutting more effectively, and the thickness of cutting material is bigger.
In sum, the present invention, by arranging the transmission units made with the material of different refractivity on described condenser lens, can be produced multiple focal point by different refraction differences.Whereby, the present invention can increase depth of focus length, improves working ability and the joint-cutting crudy of equipment.
Certainly; the present invention also can have other various embodiments; when without departing substantially from present invention spirit and essence thereof; those of ordinary skill in the art are when can make various corresponding change and deformation according to the present invention, but these change accordingly and deformation all should belong to the scope of the claims appended by the present invention.
Claims (10)
1. a condenser lens, it is characterized in that, described condenser lens is provided with at least one first transmission units and one second transmission units, described second transmission units is looped around the outward flange of described first transmission units and described first transmission units is embedded in the hollow out position in the middle of described second transmission units, and described first transmission units and described second transmission units are respectively adopted the first optical material of different refractivity and the second optical material is made.
2. condenser lens according to claim 1, it is characterised in that the specific refractivity of described first optical material and described second optical material is 0.005～0.030, namely reaches focal shift and ranges for 1～10mm.
3. condenser lens according to claim 1 and 2, it is characterized in that, described condenser lens is curved surface globe lens, planoconvex lens, other focusing lens or combined focus eyeglass, and described first transmission units and described second transmission units be interior lens and outer lens respectively.
4. condenser lens according to claim 3, it is characterised in that described interior lens are curved surface inner cylinder, described outer lens is the curved surface outer toroid cylindricality suitable with described interior lens, to form the inside and outside two parts light energy distribution in same focusing system.
5. condenser lens according to claim 4, it is characterised in that described interior lens are located at the center of described outer lens, and described interior lens are identical with the center of circle of described outer lens, to guarantee bifocal efficient coupling.
6. condenser lens according to claim 3, it is characterised in that described outer lens is made up of the material of high-purity fused quartz, described interior lens are made up of the material of high-purity fused quartz that adulterates；Or
Described outer lens is made up of the material of high-purity fused quartz that adulterates, and described interior lens are made up of the material of high-purity fused quartz；The reverse doping respectively of described outer lens and described interior lens controls the situation of refractive index, to improve focusing side-play amount.
7. condenser lens according to claim 6, it is characterised in that the material of the high-purity fused quartz of described doping is that the material of high-purity fused quartz of doped germanium element is to improve refractive index.
8. condenser lens according to claim 6, it is characterised in that the material of the high-purity fused quartz of described doping is that the material of high-purity fused quartz of doped with fluorine element is to reduce refractive index.
9. condenser lens according to claim 3, it is characterised in that described interior lens and described outer lens are formed in one structure.
10. one kind includes the laser cutting head of condenser lens as described in any one of claim 1～9.
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 |
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| Publication Number | Publication Date |
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| CN105728955A true CN105728955A (en) | 2016-07-06 |
| CN105728955B CN105728955B (en) | 2017-04-12 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1811509A (en) * | 2005-01-28 | 2006-08-02 | 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 |
| US20080169523A1 (en) * | 2007-01-15 | 2008-07-17 | Stmicroelectronics S.A. | Imaging optical module designed to be associated with an optical semiconductor component and method of fabricating same |
| CN103547947A (en) * | 2011-05-18 | 2014-01-29 | Lg伊诺特有限公司 | Lens with refractive index variations, and camera module using same |
| CN103712157A (en) * | 2012-09-29 | 2014-04-09 | 欧司朗股份有限公司 | Lens and manufacturing method thereof |
-
2016
- 2016-04-29 CN CN201610281324.6A patent/CN105728955B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1811509A (en) * | 2005-01-28 | 2006-08-02 | 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 |
| US20080169523A1 (en) * | 2007-01-15 | 2008-07-17 | Stmicroelectronics S.A. | Imaging optical module designed to be associated with an optical semiconductor component and method of fabricating same |
| CN103547947A (en) * | 2011-05-18 | 2014-01-29 | Lg伊诺特有限公司 | Lens with refractive index variations, and camera module using 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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| CN105728955B (en) | 2017-04-12 |
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