CN101823181A - Method and mechanism for quickly calibrating focal position of laser - Google Patents
Method and mechanism for quickly calibrating focal position of laser Download PDFInfo
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- CN101823181A CN101823181A CN 200910300724 CN200910300724A CN101823181A CN 101823181 A CN101823181 A CN 101823181A CN 200910300724 CN200910300724 CN 200910300724 CN 200910300724 A CN200910300724 A CN 200910300724A CN 101823181 A CN101823181 A CN 101823181A
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Abstract
The invention discloses a method and a mechanism for quickly calibrating the focusing focal position of laser. One half of a light path close to a lens is shielded, so that laser beams only form a semicircular image; and after a steel plate is ablated at a position away from the front and the back of the focus of the laser according to a linear change, the position of the focus of the laser can be determined by comparing the change of the shape of light spots. The mechanism for realizing the method comprises a shading plate (1) and a supporting plate (2). The mechanism is characterized in that the shading plate (1) and the supporting plate (2) are connected by a guide mechanism (3), the position of the shading plate (1) can be accurately regulated, and the shading plate (1) is positioned in the centers of the laser beams; and the supporting plate (2) is fixed on a laser head (4). The invention has the following advantages that: the position of the focus of the laser can be quickly and accurately calibrated; and the invention has simple device structure, convenient material acquirement and low cost.
Description
Technical field
The present invention relates to measuring technique engineering field, specifically is a kind of method and mechanism of quickly calibrating focal position of laser.
Background technology
Along with the development of laser technology and laser processing technology, Laser Processing just progressively enters into the process unit industry.Laser Processing has the characteristics of high efficiency and accuracy.In the process that equipment is adjusted, often run into the problem of accurate Calibration of Laser focus.Traditional method has two kinds: a kind of be with highpowerpulse laser near the focus from low to high (vice versa) on steel plate, burn keyhole at regular intervals, relatively the size of keyhole is determined focal position of laser; Another kind method be with the low-power continuous laser near the focus from low to high (vice versa) on millboard or resin plate, burn a continuous cut, relatively the thickness of cut changes to determine the position of laser spot.The shortcoming of these two kinds of methods is that repeated test is many, and precision is low.And utilize the image-forming principle of laser condensing lens (convex mirror), come the method for Calibration of Laser focus not appear in the newspapers as yet to pick up the road of being in the light.
Summary of the invention
A kind of novel method that the purpose of this invention is to provide a kind of practical and convenient, high accuracy, high efficiency, can position fast to laser spot.
The object of the present invention is achieved like this:
A kind of method of quick Calibration of Laser focus will be picked up near the light path of lens and keep off half, thereby be made laser beam only become the picture of semicircle shape; Make laser in distance after the front and back position of focus is ablated to steel plate by linear change, relatively the variation of light spot shape can be determined the position of laser spot.
The present invention also discloses a kind of mechanism that realizes the described method of claim 1, comprise and pick up tabula rasa 1, supporting plate 2, described picking up has guiding mechanism 3 to link to each other between tabula rasa 1 and the supporting plate 2, can accurately regulate the position of picking up tabula rasa 1, be located at the laser beam center, described guiding mechanism can adopt slot type, guide pillar guiding sleeve type etc.; Supporting plate 2 is fixed on the laser head 4; For cooling off by the tabula rasa of picking up of LASER HEATING, the described tabula rasa 1 of picking up is provided with cooling tube 5, fills cooling water or cold dry air in the described cooling tube 5, to cool off by the tabula rasa of picking up of LASER HEATING; In order to obtain better cooling effect, the described tabula rasa 1 of picking up is hollow structure; Described tabula rasa 1 material of picking up is a copper.
The present invention has following advantage:
1. the present invention has a mind to the cross sectional shape of laser is changed, and is very easy to distinguishing of pattern that laser is ablated on steel plate.
2. the present invention position of Calibration of Laser focus quickly and accurately.
3. realize that apparatus structure of the present invention is simple, draw materials conveniently, with low cost.
4. the present invention is not only applicable to the focus demarcation of industrial laser, after adopting sensitive film, can also carry out the demarcation of focal position to the ordinary optical lens.
Description of drawings
Fig. 1 realizes schematic diagram of mechanism of the present invention
Fig. 2 and Fig. 3 are the method schematic diagrames of Calibration of Laser focus of the present invention
The specific embodiment
Below in conjunction with drawings and Examples the present invention is described in further detail.
Fig. 1 is for realizing a kind of schematic diagram of mechanism of this method.This mechanism comprises picks up tabula rasa 1 and supporting plate 2, and picking up has guiding mechanism 3 to link to each other between tabula rasa 1 and the supporting plate 2, can accurately regulate the position of picking up tabula rasa, is located at the laser beam center; Supporting plate 2 is fixed on the laser head 4; Pick up tabula rasa 1 hollow, can in cooling tube 5, fill cooling water or cold dry air, to cool off by the tabula rasa of picking up of LASER HEATING.In order to obtain better cooling effect, pick up tabula rasa 1 and use the processing of copper spare.
Fig. 2 and Fig. 3 are the operation examples of Calibration of Laser focus of the present invention.The first step moves to the below (rough position of focus can be recorded by height gauge) of surface of steel plate with the focus of laser head, promptly obtains the laser of negative out of focus; Use pick up tabula rasa with the top of laser beam pick up the retaining half, after with pulse laser steel plate being ablated then, on steel plate, obtain the ablation vestige of a semi-circular shape.Second step, the laser head along continuous straight runs is moved a segment distance, the one section height Δ Z that also vertically rises simultaneously repeats the first step.The 3rd step repeated for second step, up to ablate out on steel plate as shown in Figure 3 ablation vestige of laser.The 4th step, ablation vestige more shown in Figure 3, minimum in the middle of can obtaining, ablation vestige that present circle is the ablation vestige at laser spot place, and the symmetry comparison of semicircle ablation vestige can also obtain the position of laser spot when perhaps following according to positive and negative out of focus.
Laser power can be set to about 500W during operation, and about 0.5 second of time, excessive power burns keyhole at surface of steel plate easily, is unfavorable for observing relatively; The too small vestige of then ablating is clear inadequately.
Claims (5)
1. the method for a quick Calibration of Laser focus is characterized in that: will pick up near the light path of lens and keep off half, thereby make laser beam only become the picture of semicircle shape; Make laser in distance after the front and back position of focus is ablated to steel plate by linear change, relatively the variation of light spot shape can be determined the position of laser spot.
2. mechanism that realizes the described method of claim 1, comprise and pick up tabula rasa (1), supporting plate (2), it is characterized in that: picking up has guiding mechanism (3) to link to each other between tabula rasa (1) and the supporting plate (2), can accurately regulate the position of picking up tabula rasa (1), is located at the laser beam center; Supporting plate (2) is fixed on the laser head (4).
3. mechanism according to claim 2 is characterized in that: the described tabula rasa (1) of picking up is provided with cooling tube (5), fills cooling water or cold dry air in the described cooling tube (5).
4. mechanism according to claim 3 is characterized in that: the described tabula rasa (1) of picking up is a hollow structure.
5. mechanism according to claim 3 is characterized in that: described to pick up tabula rasa (1) material be copper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910300724 CN101823181A (en) | 2009-03-06 | 2009-03-06 | Method and mechanism for quickly calibrating focal position of laser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910300724 CN101823181A (en) | 2009-03-06 | 2009-03-06 | Method and mechanism for quickly calibrating focal position of laser |
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| CN101823181A true CN101823181A (en) | 2010-09-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200910300724 Pending CN101823181A (en) | 2009-03-06 | 2009-03-06 | Method and mechanism for quickly calibrating focal position of laser |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102380710A (en) * | 2011-09-28 | 2012-03-21 | 江苏大学 | Rapid aligning device for laser focus position |
| CN103212908A (en) * | 2012-01-19 | 2013-07-24 | 昆山思拓机器有限公司 | Calibration method for dead-center position of laser spray nozzle |
| CN108274111A (en) * | 2017-12-29 | 2018-07-13 | 大族激光科技产业集团股份有限公司 | A kind of Calibration of Laser focus installations and its method |
| CN108723585A (en) * | 2018-07-03 | 2018-11-02 | 中机数控科技（福建）有限公司 | A kind of focus adjustment method of laser cutting machine |
| FR3067623A1 (en) * | 2017-06-19 | 2018-12-21 | Addup | CALIBRATING THE FOCUSING OF A POWER RADIATION SOURCE OF AN ADDITIVE MANUFACTURING APPARATUS |
| WO2019183797A1 (en) * | 2018-03-27 | 2019-10-03 | 深圳市柔宇科技有限公司 | Detection platform, system and method for focal point of laser beam |
| CN112171071A (en) * | 2020-09-28 | 2021-01-05 | 歌尔科技有限公司 | Laser etching method, laser etching device, electronic equipment and laser etching system |
| CN114235348A (en) * | 2021-11-25 | 2022-03-25 | 大连透平机械技术发展有限公司 | Focal length determining method and device of pulse laser and storage medium |
| US11458680B2 (en) | 2017-06-19 | 2022-10-04 | Addup | Calibrating a head system of a power radiation source of an additive manufacturing device |
-
2009
- 2009-03-06 CN CN 200910300724 patent/CN101823181A/en active Pending
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102380710A (en) * | 2011-09-28 | 2012-03-21 | 江苏大学 | Rapid aligning device for laser focus position |
| CN102380710B (en) * | 2011-09-28 | 2014-07-30 | 江苏大学 | Rapid aligning device for laser focus position |
| CN103212908A (en) * | 2012-01-19 | 2013-07-24 | 昆山思拓机器有限公司 | Calibration method for dead-center position of laser spray nozzle |
| CN110785247A (en) * | 2017-06-19 | 2020-02-11 | Addup公司 | Focus calibration of a power radiation source of an additive manufacturing device |
| FR3067623A1 (en) * | 2017-06-19 | 2018-12-21 | Addup | CALIBRATING THE FOCUSING OF A POWER RADIATION SOURCE OF AN ADDITIVE MANUFACTURING APPARATUS |
| WO2018234312A1 (en) | 2017-06-19 | 2018-12-27 | Addup | Calibrating the focus of a power radiation source of an additive manufacturing device |
| JP7116750B2 (en) | 2017-06-19 | 2022-08-10 | アッドアップ | Calibrating the Focus of the Output Radiation Source of Additive Manufacturing Equipment |
| KR20200020802A (en) * | 2017-06-19 | 2020-02-26 | 애드업 | Focus calibration of the output radiation source of additive manufacturing devices |
| JP2020524101A (en) * | 2017-06-19 | 2020-08-13 | アッドアップ | Calibration of output radiation source focus of additive manufacturing equipment |
| US11554551B2 (en) | 2017-06-19 | 2023-01-17 | Addup | Calibrating the focus of a power radiation source of an additive manufacturing device |
| US11458680B2 (en) | 2017-06-19 | 2022-10-04 | Addup | Calibrating a head system of a power radiation source of an additive manufacturing device |
| KR102385607B1 (en) | 2017-06-19 | 2022-04-12 | 애드업 | Focus calibration of the output radiation source of an additive manufacturing device |
| CN108274111A (en) * | 2017-12-29 | 2018-07-13 | 大族激光科技产业集团股份有限公司 | A kind of Calibration of Laser focus installations and its method |
| CN108274111B (en) * | 2017-12-29 | 2021-01-08 | 大族激光科技产业集团股份有限公司 | Device and method for calibrating laser focus |
| WO2019183797A1 (en) * | 2018-03-27 | 2019-10-03 | 深圳市柔宇科技有限公司 | Detection platform, system and method for focal point of laser beam |
| CN112041651A (en) * | 2018-03-27 | 2020-12-04 | 深圳市柔宇科技股份有限公司 | Detection platform, system and method for laser beam focus |
| CN108723585A (en) * | 2018-07-03 | 2018-11-02 | 中机数控科技（福建）有限公司 | A kind of focus adjustment method of laser cutting machine |
| CN112171071A (en) * | 2020-09-28 | 2021-01-05 | 歌尔科技有限公司 | Laser etching method, laser etching device, electronic equipment and laser etching system |
| CN114235348A (en) * | 2021-11-25 | 2022-03-25 | 大连透平机械技术发展有限公司 | Focal length determining method and device of pulse laser and storage medium |
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Application publication date: 20100908 |