CN205720742U - A kind of focusing obtains Diode laser Bessel-Gaussian beam novel optical lens - Google Patents
A kind of focusing obtains Diode laser Bessel-Gaussian beam novel optical lens Download PDFInfo
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- CN205720742U CN205720742U CN201620147266.3U CN201620147266U CN205720742U CN 205720742 U CN205720742 U CN 205720742U CN 201620147266 U CN201620147266 U CN 201620147266U CN 205720742 U CN205720742 U CN 205720742U
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- 230000003287 optical effect Effects 0.000 title claims abstract description 57
- 238000000034 method Methods 0.000 abstract description 15
- 238000009826 distribution Methods 0.000 abstract description 12
- 238000005520 cutting process Methods 0.000 abstract description 5
- 239000012780 transparent material Substances 0.000 abstract description 5
- 238000004080 punching Methods 0.000 description 4
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Abstract
The utility model discloses a kind of focusing and obtain Diode laser Bessel-Gaussian beam novel optical lens, be overlapped mutually setting including many annulus curved surface and focusing curved surface, described many annulus curved surface and focusing curved surface with coaxial manner；Being provided with on described many annulus curved surface and arrange annulus with concentric structure, cuff surface is sphere or aspheric surface, is provided with annular optical axis: described focusing curved surface is sphere or aspheric surface between adjacent annulus.Using single eyeglass can focus on acquisition Bessel-Gaussian beam, form center range Energy distribution high, marginal distribution extremely low focusing light beam section, its high power density scope hot spot is minimum, and depth of focus is the longest, and in depth of focus section, hot spot peak power density is close.This kind of eyeglass assembly precision requires general, laser beam pattern is had wider universality, can improve and improve the cutting technique of Laser focus technique, particularly transparent material.
Description
Technical field
This utility model relates to field of optical equipment, is specially one and focuses on acquisition Diode laser Bessel-Gaussian beam novel optical lens.
Background technology
Laser processing technology is to utilize the characteristic of high-order harmonics spectrum to carry out cut, welding, surface process, punching, micro Process etc., the most especially requires of a relatively high with techniques such as cut, punching, micro Process to focusing on laser beam characteristic.Under equal laser power, often must be provided simultaneously with that focal beam spot is little, depth of focus length, peak power density high, process velocity and quality could be promoted to a greater extent.
Nowadays, cut occupies the more than half market of laser processing technology becomes main flow, and major part cut light path uses the preferable optical lens of optical property to combine even aspherical mirror.But, the focal beam spot hour that conventional optical lens, mirror group and aspherical mirror obtain, then depth of focus length limited；Meet depth of focus length, then hot spot peak power reduction relatively greatly.
Axially chip multi-focal optical lens can make up conventional optical lens, mirror group and the deficiency of aspherical mirror to a certain extent, can realize that focal beam spot is little, depth of focus is longer simultaneously.Shortcoming is, it is multifactor that axial chip multi-focal optical lens is limited to laser beam pattern composition, incident beam size etc., thus affects stability in use and scope.
Axicon lens is obtained in that bessel beam, and then realizes Diode laser small light spot high-power peaks Energy distribution.Unfortunately, in axicon lens focal depth range, hot spot peak power density comparison in difference is obvious, and high to mechanical assembly required precision, it is difficult to be widely used in industrial lasers processing industry.
For improving the processing technique such as existing cut, punching, micro Process, improve optical lens to laser beam pattern universality and focal beam spot depth of focus section inner laser bundle peak power stability, reduce assembly precision requirement simultaneously, reduce path optics lens numbers and complexity, to be applicable to general occasion, the utility model proposes a kind of new type lens, coaxial many annulus Gauss mirror, parallel input light is focused on and can obtain Bessel-Gaussian beam, focus on that section high energy distribution scope hot spot is little, depth of focus is extremely long and in focal depth range hot spot peak power density basically identical.
Utility model content
It is minimum that the purpose of this utility model is to provide one that parallel input light focusing can be obtained focal beam spot high power density scope, peak power density is high, the Bessel-Gaussian beam that in depth of focus extremely length and focal depth range, peak power density difference is the least, can be used for improving the laser processing technology such as cut, punching, micro Process etc. high to focusing on beam characteristics requirement, it is particularly advantageous in improving Laser Processing speed and the quality of transparent material, to solve the technical scheme of the problem proposed in above-mentioned background technology.
A kind of focusing obtains Diode laser Bessel-Gaussian beam novel optical lens, is overlapped mutually setting including many annulus curved surface and focusing curved surface, described many annulus curved surface and focusing curved surface with coaxial manner；Being provided with on described many annulus curved surface and arrange annulus with concentric structure, cuff surface is sphere or aspheric surface, is provided with annular optical axis: described focusing curved surface is sphere or aspheric surface between adjacent annulus.
As preferably, annular optical axis is concentric with optical lens center axle and is parallel to each other.
As preferably, optical lens positive and negative assembling mode all can use, and needs parallel input light or nearly parallel input light incident, and focal beam spot position is focal position before and after optical lens, and optical lens focal length depends on that another focuses on curved surface correspondence focal length.
As preferably, focal beam spot overall size is directly proportional to the annulus width of coaxial many annulus Gauss mirror, is inversely proportional to corresponding annulus focal length, is directly proportional with the optical lens corresponding focal length of another focusing surface, and proportionality coefficient is about 1.
Compared with prior art, the beneficial effects of the utility model are: this utility model uses single optical lens can focus on acquisition Bessel-Gaussian beam, form center range Energy distribution high, marginal distribution extremely low focusing light beam section, its high power density scope hot spot is minimum, depth of focus is the longest, and in depth of focus section, hot spot peak power density is close.This kind of optical lens assembly precision requires general, laser beam pattern is had wider universality, can improve and improve the cutting technique of Laser focus technique, particularly transparent material.
Accompanying drawing explanation
Fig. 1 is this utility model structural representation；
Fig. 2 is annulus curved-surface structure schematic diagram；
Fig. 3 is this utility model cutting plane structural representation；
Fig. 4 is this utility model partial cutaway tangent plane structural representation；
Fig. 5 is each annular sphere band optical axis shown in coaxial many annulus Gauss mirror and dotted line；
Fig. 6 is the light splitting demonstration during embodiment 1 assembles mode, and beam Propagation shown in dotted line；
Fig. 7 is the light splitting demonstration during embodiment 2 assembles mode, and beam Propagation shown in dotted line；
Fig. 8 is optical lens cross section in focus hot spot power smooth matching Bezier Gauss distribution cut away view；
Fig. 9 is that optical lens focuses on depth of focus section out of focus cross section hot spot power smooth matching Bezier Gauss distribution cut away view.
Detailed description of the invention
Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is clearly and completely described, it is clear that described embodiment is only a part of embodiment of this utility model rather than whole embodiments.Based on the embodiment in this utility model, the every other embodiment that those of ordinary skill in the art are obtained under not making creative work premise, broadly fall into the scope of this utility model protection.
Refer to Fig. 1～4, this utility model provides one to focus on and obtains Diode laser Bessel-Gaussian beam novel optical lens, including many annulus curved surface 2 and focusing curved surface 1, many annulus curved surface 2 and focusing curved surface 1 are overlapped mutually setting with coaxial manner, it is provided with on many annulus curved surface 2 and annulus 3 is set with concentric structure, annulus 3 surface is sphere or aspheric surface, is provided with annular optical axis 4 between adjacent annulus 3, and focusing on curved surface 1 is sphere or aspheric surface.Under parallel or near parallel input light, can obtain focal beam spot high power density scope minimum, peak power density is high, the Bessel-Gaussian beam that in depth of focus extremely length and focal depth range, peak power density difference is the least.In view of this kind of unnecessary anaberration of optical lens and optical lens processing cost, select sphere scheme optimal.The design selects sphere scheme, but contains aspheric surface and both combinations.
Wherein, annular optical axis 4 is concentric with optical lens center axle and is parallel to each other.Optical lens positive and negative assembling mode all can use, and needs parallel input light or nearly parallel input light incident, and focal beam spot position is focal position before and after optical lens, and optical lens focal length depends on that another focuses on curved surface correspondence focal length.
Further, focal beam spot overall size Stimulated Light light beam parameters affects, and depends primarily on the focal beam spot of design optical lens.Burnt hot spot overall size is directly proportional to annulus 3 width of coaxial many annulus Gauss mirror, is inversely proportional to corresponding annulus 3 focal length, is directly proportional with the optical lens corresponding focal length of another focusing surface, and proportionality coefficient is about 1.Depth of focus length is to focus on beam center high power density distributed areas change in size to weigh.
Meanwhile, optical lens is applicable to the techniques such as the Laser Processing such as glass-cutting improving fine laser processing technology, particularly transparent material.Compared with prior art, this utility model uses single optical lens can focus on acquisition Bessel-Gaussian beam, forms center range Energy distribution high, marginal distribution extremely low focusing light beam section, its high power density scope hot spot is minimum, and depth of focus is the longest, and in depth of focus section, hot spot peak power density is close.This kind of optical lens assembly precision requires general, laser beam pattern is had wider universality, can improve and improve the cutting technique of Laser focus technique, particularly transparent material.
Embodiment 1
The annulus of coaxial many annulus Gauss mirror presents equidistantly, and annulus 3 width is T, is beneficial to the stability improving optical lens under different zlasing modes, and each annulus 3 is spherical annulus, and spherical radius is equal is R0, and another spherical radius is R1.Optical lens diameter depends on launching spot size.
As shown in Figure 6, as a example by circular parallel or near directional light incidence, D is focal beam spot overall diameter, under the most corresponding corresponding assembling mode of BFL1, BFL2, and the back focal length that spherical radius R1 and optical lens thicknesses and refractive index are formed.Wherein, focal beam spot diameter D is directly proportional to spherical radius R1 and annulus width T, is inversely proportional to annulus 3 spherical radius, and theoretical proportions coefficient is about 1.As shown in Figure 8, optical lens focal beam spot overall diameter is D, and the spot diameter of actual available high power density distribution is about d, d much smaller than focal beam spot overall diameter D.
Embodiment 2
Owing to optical lens can positive and negative assemble, as it is shown in fig. 7, as a example by circular parallel or near directional light incidence, D is focal beam spot overall diameter, under the most corresponding corresponding assembling mode of BFL1, BFL2, the back focal length that spherical radius R1 and optical lens thicknesses and refractive index are formed.Wherein, focal beam spot diameter D is directly proportional to spherical radius R1 and annulus width T, is inversely proportional to annulus 3 spherical radius, and theoretical proportions coefficient is about 1.Optical lens depth of focus section arbitrary section hot spot overall diameter as seen from Figure 9 is that D1, D1 increase along with the increase of out of focus distance, and actual available high power density distribution spot diameter d is basically unchanged.In depth of focus section, focal beam spot peak power density difference is little.
Embodiment the most of the present utility model, for the ordinary skill in the art, being appreciated that in the case of without departing from principle of the present utility model and spirit and these embodiments can carry out multiple change, revise, replace and modification, scope of the present utility model is defined by the appended claims and the equivalents thereof.
Claims (4)
1. one kind focuses on acquisition Diode laser Bessel-Gaussian beam novel optical lens, it is characterised in that: including many annulus curved surface and focus on curved surface, described many annulus curved surface is overlapped mutually setting with focusing on curved surface with coaxial manner；Being provided with on described many annulus curved surface and arrange annulus with concentric structure, cuff surface is sphere or aspheric surface, is provided with annular optical axis: described focusing curved surface is sphere or aspheric surface between adjacent annulus.
A kind of focusing the most according to claim 1 obtains Diode laser Bessel-Gaussian beam novel optical lens, it is characterised in that: described annular optical axis is concentric with many annulus center of surface axle and is parallel to each other.
A kind of focusing the most according to claim 1 obtains Diode laser Bessel-Gaussian beam novel optical lens, it is characterized in that: described optical lens positive and negative assembling mode all can use, need parallel input light or nearly parallel input light incident, focal beam spot position is focal position before and after optical lens, and optical lens focal length depends on that another focuses on curved surface correspondence focal length.
A kind of focusing the most according to claim 3 obtains Diode laser Bessel-Gaussian beam novel optical lens, it is characterized in that: described focal beam spot overall size is directly proportional to the annulus width of coaxial many annulus Gauss mirror, it is inversely proportional to corresponding annulus focal length, being directly proportional with the optical lens corresponding focal length of another focusing surface, proportionality coefficient is about 1.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105607162A (en) * | 2016-02-26 | 2016-05-25 | 上海嘉强自动化技术有限公司 | Novel optical lens acquiring long focal depth Bessel gauss light beams through focusing |
| CN109814184A (en) * | 2019-03-20 | 2019-05-28 | 中国工程物理研究院激光聚变研究中心 | The production method of complex optics lens, laser aid and Diode laser vortex beams |
| CN110967782A (en) * | 2020-01-03 | 2020-04-07 | 北京卓镭激光技术有限公司 | High-quality Bessel beam lens |
| CN111715624A (en) * | 2019-03-19 | 2020-09-29 | 武汉光谷航天三江激光产业技术研究院有限公司 | Laser cleaning device |
| CN114406450A (en) * | 2022-01-25 | 2022-04-29 | 中国工程物理研究院激光聚变研究中心 | Regulating and controlling device and method for high-uniformity tight-focusing long-light needle in laser processing |
| CN115327685A (en) * | 2022-08-30 | 2022-11-11 | 山东理工大学 | A single aspherical lens for TO encapsulation |
-
2016
- 2016-02-26 CN CN201620147266.3U patent/CN205720742U/en active Active
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105607162A (en) * | 2016-02-26 | 2016-05-25 | 上海嘉强自动化技术有限公司 | Novel optical lens acquiring long focal depth Bessel gauss light beams through focusing |
| CN105607162B (en) * | 2016-02-26 | 2017-06-20 | 上海嘉强自动化技术有限公司 | One kind is focused on and obtains Diode laser Bessel-Gaussian beam novel optical lens |
| CN111715624A (en) * | 2019-03-19 | 2020-09-29 | 武汉光谷航天三江激光产业技术研究院有限公司 | Laser cleaning device |
| CN109814184A (en) * | 2019-03-20 | 2019-05-28 | 中国工程物理研究院激光聚变研究中心 | The production method of complex optics lens, laser aid and Diode laser vortex beams |
| CN110967782A (en) * | 2020-01-03 | 2020-04-07 | 北京卓镭激光技术有限公司 | High-quality Bessel beam lens |
| CN110967782B (en) * | 2020-01-03 | 2024-06-04 | 北京卓镭激光技术有限公司 | High-quality Bessel beam lens |
| CN114406450A (en) * | 2022-01-25 | 2022-04-29 | 中国工程物理研究院激光聚变研究中心 | Regulating and controlling device and method for high-uniformity tight-focusing long-light needle in laser processing |
| CN114406450B (en) * | 2022-01-25 | 2023-11-07 | 中国工程物理研究院激光聚变研究中心 | Regulation and control device and method for high-uniformity tightly-focused long optical needle in laser processing |
| CN115327685A (en) * | 2022-08-30 | 2022-11-11 | 山东理工大学 | A single aspherical lens for TO encapsulation |
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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: 201611 first floor, No. 56, Lane 1500, Xinfei Road, Songjiang District, Shanghai Patentee before: SHANGHAI EMPOWER AUTOMATION TECHNOLOGY Co.,Ltd. Country or region before: China |
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