 Power regulating method of laser marking system and laser marking system
专利摘要:
The present invention relates to a power compensation method of a laser marking system. The power compensation method of the disclosed laser marking system, the power compensation method of the laser marking system, the power compensation method of the laser marking system, characterized in that to compensate for the laser beam in real time by measuring the laser beam power on the path of the laser beam. . According to this, since the laser power is measured and corrected in real time, feedback can be quickly and precisely marked. 公开号:KR20030084408A 申请号:KR1020020023110 申请日:2002-04-26 公开日:2003-11-01 发明作者:박상영；이정구 申请人:주식회사 이오테크닉스； IPC主号:
专利说明:
Power regulating method of laser marking system and laser marking system [12] The present invention relates to a power compensation method and a laser marking system of a laser marking system, and more particularly, to a laser marking system and a power compensation method for adjusting a desired laser output by measuring the laser output in real time. [13] 1 is a schematic configuration diagram of a conventional laser marking system. Referring to FIG. 1, the laser beam from the laser oscillator 10 marks the surface of the marking object 40 via the galvano scanner 20 and the f-theta lens 30. In order to maintain a constant marking quality, the power of the laser beam must be kept constant. [14] However, the laser rod 12 inside the laser oscillator 10 has a problem in that the output power of the laser oscillator 10 is reduced even if the same power is input since the life is gradually reduced over time. [15] On the other hand, reference numeral 50 is a controller 50 for adjusting the power supplied to the laser rod 12. [16] Conventionally, in order to compensate for the power of the laser beam, the laser marking operation is stopped and the path of the laser beam is broken by a detector (not shown) that measures the intensity of the laser beam, and the laser oscillator 10 reflects the measured result. The method of adjusting the laser power supplied to the was used. [17] However, this method must stop the marking operation in order to measure the intensity of the laser beam, and also cannot be applied when the fluctuation of the power supplied to the laser oscillator 10 is severe. [18] The present invention has been made to solve the above problems, and an object of the present invention is to provide a power marking method and a laser marking system of a laser marking system in real time. [1] 1 is a schematic configuration diagram of a conventional laser marking system. [2] 2 is a schematic structural diagram of a laser marking system according to a preferred embodiment of the present invention. [3] 3 is a schematic circuit diagram illustrating a power compensation method of the laser marking system according to the present invention. [4] 4 is a schematic circuit diagram illustrating another example of the power compensation method of the laser marking system according to the present invention. [5] * Description of Signs of Major Parts of Drawings * [6] 10: laser oscillator 12: laser rod [7] 20: galvano scanner 30: f-theta lens [8] 40: marking object 50, 150: controller [9] 160: splitter 170: focusing lens [10] 180: sensor 181: inverter [11] 182: summer 183: scale factor [19] In order to achieve the above object, the power compensation method of the laser marking system of the present invention, [20] In the power compensation method of the laser marking system, [21] Compensating for the laser beam in real time by measuring the laser beam power on the path of the laser beam. [22] The method, [23] (a) dividing the laser beam into a beam splitter installed on the path of the laser beam between the laser oscillator and the galvano scanner; [24] (b) measuring the intensity of the split laser beam; [25] (c) correcting the power of the laser oscillator from the measured intensity of the laser beam. [26] Step (b) is a step of focusing the split laser beam with a focusing lens and measuring the intensity of the focused laser beam with a sensor. [27] In addition, the laser marking system of the present invention in order to achieve the above object, [28] A laser marking system for irradiating a laser beam oscillated from a laser oscillator to a marking object through a galvano scanner and an f-theta lens, [29] A beam splitter installed on a path of a laser beam between the laser oscillator and the galvano scanner; [30] A focusing lens for focusing the laser beam split into the beam splitter; [31] A sensor for measuring the intensity of a laser beam from the focusing lens; [32] And a controller configured to adjust the intensity of the laser beam by receiving the intensity of the laser beam measured by the sensor. [33] Preferably, the beam splitter divides a predetermined power within 5% of the laser oscillated from the laser oscillator. [34] In addition, the sensor is preferably a resistance meter for outputting a resistance value according to the intensity of the irradiated light. [35] Hereinafter, a power compensation method of a laser marking system according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. In this process, the thicknesses of layers or regions illustrated in the drawings are exaggerated for clarity. [36] Figure 2 shows a schematic configuration diagram of a laser marking system according to a preferred embodiment of the present invention, the same reference numerals are used for objects having the same structure as the conventional invention, and detailed description thereof will be omitted. [37] Referring to FIG. 2, the laser marking system includes a laser oscillator 10, a galvano scanner 20 and an f-theta lens 30, and a laser beam between the laser oscillator 10 and the galvano scanner 20. Receives a beam splitter 160 that reflects a portion of the laser beam from the laser oscillator 10 on the path, a focusing lens 170 that focuses the reflected laser beam, and a laser beam from the focusing lens 170 A sensor 180 that converts and outputs an electrical signal and a controller 150 that adjusts the power supplied to the laser rod 12 in the laser oscillator according to the laser beam power from the sensor 180 are provided. [38] The laser oscillator 10 is provided with a laser rod 12 therein, the power of the laser beam output by the laser voltage input to the laser rod 12 from the outside is determined. [39] The galvano scanner 20 includes an X mirror 21 and a Y mirror 22 and a motor (not shown) for driving them, respectively, and adjusts the positions of these mirrors to scan the laser beam in a predetermined area in the XY direction. Let's do it. [40] The f-theta lens 30 causes the incident laser beam to form the same sized focal point for the entirety of the marking object 40. [41] The beam splitter 160 passes most of the incident laser beam and reflects a predetermined laser beam within 5%. [42] The laser beam split by the beam splitter 160 is focused through the focusing lens 170 and then incident to the sensor 180 that measures the intensity of the laser beam. The sensor 180 converts a laser beam into an electrical signal, and a resistance meter, such as a thermocouple, is used to change and output the magnitude of the electrical signal according to the intensity of the laser beam. May be used. [43] 3 is a schematic circuit diagram illustrating a power compensation method of the laser marking system according to the present invention. Referring to FIG. 3, the sign of the voltage V DET measured by the sensor 180 is reversed in the inverter 181. The value reflected by the beam splitter 160 is then summed in the summer 182 with the stored reference voltage V REF . The summed voltage is input to the controller 150 as the measured value of the laser beam by the scale factor 183. The scale factor 183 is a ratio of switching to the incident value corresponding to the value reflected by the beam splitter 160. The corrected power P LASER is supplied to the laser rod 12 of the laser oscillator 10 by comparing the measured laser power voltage IN with the power of the target laser beam. The process is measured and calibrated in real time so that feedback continues quickly. [44] 4 is a schematic circuit diagram illustrating another example of the power compensation method of the laser marking system according to the present invention. Referring to FIG. 4, the sign of the voltage V DET measured by the sensor 180 is reversed in the inverter 181. The value reflected by the beam splitter 160 is then summed in the summer 182 with the stored reference voltage V REF . The summed voltage is input to the controller 150. This input voltage IN is added to the target laser power voltage or the laser power voltage when measured. The summed power voltage is supplied to the laser rod 12 of the laser oscillator 10 so that the corrected power P LASER is supplied to the laser rod 12 of the laser oscillator 10. The reason why the factor 183 is not used is that the scale factor 183 is about 20 to 100, so even if a little error occurs in the value measured by the sensor 180, the error of the laser oscillator 10 generates several orders of magnitude. Because it becomes. [45] As described above, the power compensation method of the laser marking system according to the present invention measures and corrects the laser power in real time, thereby achieving fast and precise marking. [46] Although the present invention has been described with reference to the embodiments with reference to the drawings, this is merely exemplary, it will be understood by those skilled in the art that various modifications and equivalent embodiments are possible. Therefore, the true technical protection scope of the present invention will be defined only by the appended claims.
权利要求:
Claims (10) [1" claim-type="Currently amended] In the power compensation method of the laser marking system, Compensating the laser beam in real time by measuring the laser beam power on the path of the laser beam power compensation method of the laser marking system. [2" claim-type="Currently amended] The method of claim 1, (a) dividing the laser beam into a beam splitter installed on the path of the laser beam between the laser oscillator and the galvano scanner; (b) measuring the intensity of the split laser beam; (c) correcting the power of the laser oscillator from the measured intensity of the laser beam. [3" claim-type="Currently amended] The method of claim 2, wherein the beam splitter, And a predetermined power within 5% of the laser oscillated from the laser oscillator. [4" claim-type="Currently amended] The method of claim 2, wherein step (b) comprises: A power compensation method of a laser marking system, characterized by focusing the divided laser beam with a lens, and measuring the intensity of the focused laser beam with a sensor. [5" claim-type="Currently amended] The method of claim 4, wherein the sensor, A power compensation method of a laser marking system, characterized in that the resistance measuring device for outputting a resistance value according to the intensity of the irradiated light. [6" claim-type="Currently amended] The method of claim 2, wherein step (c) comprises: (c1) inverting the output voltage; (c2) adding the inverted voltage to the reference voltage; and (c3) correcting the laser oscillator power by multiplying the added voltage by a scale factor as a measured value, the power compensation method of a laser marking system further comprising. [7" claim-type="Currently amended] The method of claim 2, wherein step (c) comprises: (c1) inverting the output voltage; (c2) adding the inverted voltage to the reference voltage; (c3) outputting a laser beam with a corrected output value summed with a laser output value targeted for the added voltage. [8" claim-type="Currently amended] A laser marking system for irradiating a laser beam oscillated from a laser oscillator to a marking object through a galvano scanner and an f-theta lens, A beam splitter installed on a path of a laser beam between the laser oscillator and the galvano scanner; A focusing lens for focusing the laser beam split into the beam splitter; A sensor for measuring the intensity of a laser beam from the focusing lens; And a controller configured to adjust the intensity of the laser beam by receiving the intensity of the laser beam measured from the sensor. [9" claim-type="Currently amended] The method of claim 8, wherein the beam splitter, A laser marking system, characterized in that for dividing a predetermined power within 5% of the laser oscillated from the laser oscillator. [10" claim-type="Currently amended] The method of claim 8, wherein the sensor, A laser marking system, characterized in that the resistance measuring instrument for outputting a resistance value according to the intensity of the irradiated light.
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法律状态:
2002-04-26|Application filed by 주식회사 이오테크닉스 2002-04-26|Priority to KR1020020023110A 2003-11-01|Publication of KR20030084408A
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申请号 | 申请日 | 专利标题 KR1020020023110A|KR20030084408A|2002-04-26|2002-04-26|Power regulating method of laser marking system and laser marking system| 相关专利
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