CN114784610A - Laser power detection and adjustment device and method - Google Patents
Laser power detection and adjustment device and method Download PDFInfo
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- CN114784610A CN114784610A CN202210694362.XA CN202210694362A CN114784610A CN 114784610 A CN114784610 A CN 114784610A CN 202210694362 A CN202210694362 A CN 202210694362A CN 114784610 A CN114784610 A CN 114784610A
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- 238000001514 detection method Methods 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000012360 testing method Methods 0.000 claims abstract description 17
- 230000010287 polarization Effects 0.000 claims abstract description 16
- 230000028161 membrane depolarization Effects 0.000 claims abstract description 13
- 230000003287 optical effect Effects 0.000 claims abstract description 13
- 239000000835 fiber Substances 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 238000000605 extraction Methods 0.000 claims 2
- 238000007639 printing Methods 0.000 abstract description 15
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000007689 inspection Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 5
- 230000002159 abnormal effect Effects 0.000 description 4
- 238000007648 laser printing Methods 0.000 description 4
- 230000002999 depolarising effect Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010330 laser marking Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/13—Stabilisation of laser output parameters, e.g. frequency or amplitude
- H01S3/1305—Feedback control systems
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/435—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material
- B41J2/47—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material using the combination of scanning and modulation of light
- B41J2/471—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material using the combination of scanning and modulation of light using dot sequential main scanning by means of a light deflector, e.g. a rotating polygonal mirror
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J3/00—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed
- B41J3/407—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed for marking on special material
- B41J3/4073—Printing on three-dimensional objects not being in sheet or web form, e.g. spherical or cubic objects
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
- G01J1/4257—Photometry, e.g. photographic exposure meter using electric radiation detectors applied to monitoring the characteristics of a beam, e.g. laser beam, headlamp beam
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- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Manufacturing & Machinery (AREA)
- Automation & Control Theory (AREA)
- Plasma & Fusion (AREA)
- Lasers (AREA)
- Laser Beam Processing (AREA)
Abstract
The invention provides a laser power detection and adjustment device and a method, wherein the method comprises the following steps: testing the power of laser output by a laser to obtain a linear graph of the power and the duty ratio; the half-wave plate adjusts the optical path difference between o light in the vertical direction and e light in the horizontal direction of the laser, and the depolarization spectroscope adjusts the polarization state of the laser to divide the laser into two beams according to a fixed energy proportion, wherein one beam of laser directly marks a product; the power sensor receives another laser beam and transmits the actual power of the laser beam to the computer; and the computer compares the actual power with the power setting range, if the actual power does not exceed the power setting range, the computer continues marking the product, and if the actual power exceeds the power setting range, the computer adjusts the output power of the laser. The invention can ensure the stability of laser power output so as to ensure the consistency of the printing depth of the product, reduce the probability of the product being damaged by laser heat, reduce NG products caused by printing and integrally improve the production yield of the product.
Description
Technical Field
The invention relates to the technical field of laser printing, in particular to a laser power detection and adjustment device and method.
Background
At present, printing of semiconductor discrete, Integrated Circuit (IC) and wafer bare chip products is basically realized by laser printing, and detection of laser printing effect in the industry at present mainly depends on visual detection of printed printing, but the mode mainly detects reprinting, missing printing and misprinting of the printing, but cannot detect printing depth. The depth of laser printing is mainly directly determined by the laser power, and if the laser power output is unstable, the chip can be damaged due to the fact that the laser cannot be printed or directly penetrates through a protective layer on the plastic package surface of a product.
Disclosure of Invention
The invention aims to provide a laser power detection and adjustment device and method, which can ensure the stability of laser power output so as to ensure the consistency of the printing depth of a product, reduce the probability of laser thermal damage of the product, and reduce NG products caused by printing so as to integrally improve the production yield of the product.
In order to solve the above technical problem, the present invention provides a laser power detection and adjustment method, which comprises the following steps:
testing the power of laser output by a laser to obtain a linear graph of the power and the duty ratio;
the half-wave plate adjusts the optical path difference between the o light in the vertical direction and the e light in the horizontal direction of the laser, and the depolarization spectroscope adjusts the polarization state of the laser to divide the laser into two beams according to a fixed energy proportion, wherein one beam of laser directly marks a product;
the power sensor receives another laser beam and transmits the actual power of the laser beam to the computer; and
and the computer compares the actual power with a power setting range, if the actual power does not exceed the power setting range, the computer continues marking the product, and if the actual power exceeds the power setting range, the computer adjusts the output power of the laser according to a linear graph of the power and the duty ratio.
Optionally, the fixed energy ratio comprises 1:99, the energy ratio of the laser for marking the product is 99%.
Optionally, if the actual power exceeds the power setting range, the adjusting method further includes:
the computer carries out self-checking on marking parameters according to LOG records, and if the marking parameters are not artificially modified through detection, the output power of the laser is adjusted through a marking controller; if the marking parameters are detected to be artificially modified, the marking parameters need to be modified to initial values;
the initial values of the marking parameters are parameters obtained when a product is subjected to marking test, the LOG records contain the initial values of the marking parameters, and the LOG records are stored in the computer.
Optionally, after the number of times that the marking controller adjusts the output power of the laser exceeds 3 times, if the actual power exceeds the power setting range again, the marking controller stops to alarm.
Optionally, the LOG record further includes self-inspection data of the marking controller and the light emitting panel of the laser.
Correspondingly, the invention also provides a laser power detection and adjustment device, which comprises:
a laser for emitting laser light;
the half-wave plate is used for adjusting the optical path difference between the vertical direction o light and the horizontal direction e light of the laser;
the depolarization spectroscope is used for adjusting the polarization state of the laser to enable the polarization state to be divided into two beams according to a fixed energy proportion, wherein one beam of laser directly marks a product;
the power sensor is used for receiving another laser beam and transmitting the actual power of the laser beam to the computer; and
and the computer is used for comparing the actual power with a power setting range, continuously marking the product if the actual power is not beyond the power setting range, and adjusting the output power of the laser according to a linear graph of the power and the duty ratio if the actual power is beyond the power setting range.
Optionally, the computer is further configured to perform self-inspection on the marking parameter according to the LOG record, and detect whether the marking parameter is manually modified;
the LOG record comprises an initial value of the marking parameter, the initial value of the marking parameter is a parameter obtained when a product is subjected to marking test, and the LOG record is stored in the computer.
Optionally, the laser power detection and adjustment apparatus further includes a marking controller, and the marking controller is configured to adjust the output power of the laser according to a self-test result of the computer.
Optionally, the LOG record further includes self-inspection data of the marking controller and the light emitting panel of the laser.
Optionally, the laser includes a fiber laser and a CO2A laser, a solid state laser, a green laser, or an ultraviolet laser.
In the laser power detection and adjustment device and method provided by the invention, the power of the laser output by the laser is tested firstly, and a linear graph of the power and the duty ratio is obtained; then, the optical path difference between o light in the vertical direction and e light in the horizontal direction of the laser is adjusted through a half-wave plate, and a polarization state of the laser is adjusted by a depolarization spectroscope to be divided into two beams according to a fixed energy proportion, wherein one beam of the laser directly marks a product; the power sensor receives another laser beam and transmits the actual power of the laser beam to the computer; the computer compares the actual power with the power setting range, if the actual power is not beyond the power setting range, the computer continues marking the product, and if the actual power is beyond the power setting range, the computer adjusts the output power of the laser according to the line graph of the power and the duty ratio, so that the stability of laser power output is ensured, the consistency of the printing depth of the product is ensured, the probability of the product being thermally damaged by laser is reduced, and the NG product caused by printing is reduced, thereby integrally improving the production yield of the product.
Drawings
It will be appreciated by those skilled in the art that the drawings are provided for a better understanding of the invention and do not constitute any limitation to the scope of the invention.
Fig. 1 is a schematic structural diagram of a laser power detection and adjustment apparatus according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of an operation of a laser power detection and adjustment apparatus according to an embodiment of the present invention.
Fig. 3 is a schematic diagram of a laser power detection and adjustment apparatus according to another embodiment of the present invention.
Fig. 4 is a linear graph of power versus duty cycle of a laser according to an embodiment of the present invention.
Detailed Description
To further clarify the objects, advantages and features of the present invention, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings. It is to be noted that the drawings are in greatly simplified form and are not to scale, but are merely intended to facilitate and clarify the explanation of the embodiments of the present invention. Further, the structures illustrated in the drawings are often part of actual structures. In particular, the drawings may have different emphasis points and may sometimes be scaled differently.
As used in this disclosure, the singular forms "a," "an," and "the" include plural referents, the term "or" is generally employed in a sense including "and/or," the terms "a," "an," and "the" are generally employed in a sense including "at least one," the terms "at least two" are generally employed in a sense including "two or more," and further, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to imply that the number of indicated technical features is essential. Thus, features defined as "first," "second," and "third" may explicitly or implicitly include one or at least two of the features unless the content clearly dictates otherwise.
Fig. 1 is a schematic structural diagram of a laser power detection and adjustment device according to an embodiment of the present invention, fig. 2 is a schematic operation diagram of the laser power detection and adjustment device according to an embodiment of the present invention, and fig. 3 is a schematic operation diagram of the laser power detection and adjustment device according to another embodiment of the present invention. As shown in fig. 1 to 3, the laser power detection and adjustment apparatus provided by the present invention includes: a laser 1 for emitting laser light; the half-wave plate 2 is used for adjusting the optical path difference between the laser light in the vertical direction o and the laser light in the horizontal direction e; the depolarization spectroscope 3 is used for adjusting the polarization state of the laser to divide the laser into two beams according to a fixed energy proportion, wherein one beam of laser directly marks a product; a power sensor 6 for receiving another laser beam and transmitting the actual power of the laser beam to a computer 8; and the computer 8 is used for comparing the actual power with the power setting range, if the actual power does not exceed the power setting range, marking the product continuously, and if the actual power exceeds the power setting range, the computer 8 adjusts the output power of the laser according to a linear graph of the power and the duty ratio.
In this embodiment, the laser 1 includes, but is not limited to, a fiber laser, and a CO2A laser, a solid state laser, a green laser, or an ultraviolet laser.
The polarization state of the laser output by the laser 1 is composed of P-polarized light and S-polarized light in a certain proportion, the polarization proportion of the P-polarized light and the S-polarized light is randomly changed, and if the light splitting only adopts a common light splitter, the energy ratio of the reflected light and the transmitted light changes along with the change of the proportion of the P-polarized light and the S-polarized light. In the invention, the half-wave plate 2 and the depolarization spectroscope 3 are combined, and the polarization state of the laser is adjusted by adjusting the optical path difference between o light in the vertical direction and e light in the horizontal direction of the laser, so that the stability of the proportion of the split energy is ensured and the accuracy of measurement is ensured. In this embodiment, the fixed energy ratio includes 1:99, and the energy ratio of the laser for marking the product is 99%. In an embodiment of the present invention, the product is marked by using the transmission laser 4, as shown in fig. 2, the energy ratio of the transmission laser 4 is 99%, the energy ratio of the reflection laser 5 is 1%, that is, the depolarization spectroscope 3 divides the laser into the transmission laser 4 of 99% and the reflection laser 5 of 1%. In another embodiment of the present invention, a reflected laser 5 is used to mark the product, please refer to fig. 3, the energy ratio of the transmitted laser 4 is 1%, and the energy ratio of the reflected laser 5 is 99%, that is, the depolarizing beam splitter 3 divides the laser into 1% of the transmitted laser 4 and 99% of the reflected laser 5. Of course, the energy ratio of the transmitted laser light 4 to the reflected laser light 5 is not limited to 1:99 or 99:1, but may be any other suitable ratio.
The laser power detection and adjustment device further comprises a scanning galvanometer 9, and the transmission laser 4 or the reflection laser 5 with the energy ratio of 99 percent for marking marks the product after passing through the scanning galvanometer 9.
The power sensor 6 is used for receiving another laser beam (1% energy of the transmitted laser beam 4 or the reflected laser beam 5) and transmitting the actual power of the laser beam to the Computer 8 (Personal Computer, PC). The receiving may be real-time and the power data received by the power sensor 6 is also transmitted to the computer 8 continuously in real time, or the laser may be received and transmitted to the computer 8 at a certain time interval, which is not limited in the present invention.
Before formally marking a product, marking debugging is carried out to obtain a proper marking parameter, namely an initial value of the marking parameter, wherein the initial value of the marking parameter comprises a marking power setting range, namely a range suitable for marking laser power, and marking failure or abnormal marking is possible if the initial value of the marking parameter exceeds the range. LOG records containing initial values of the marking parameters are stored in the computer 8. And the computer 8 is used for comparing the actual power with a power setting range, if the actual power does not exceed the power setting range, marking the product continuously, and if the actual power exceeds the power setting range, the computer 8 adjusts the output power of the laser according to a linear graph of the power and the duty ratio.
In this embodiment, the computer 8 is further configured to perform self-inspection on the marking parameter according to the LOG record, and detect whether the marking parameter is modified manually. The laser power detection adjusting device further comprises a marking controller 7, and the marking controller 7 is used for adjusting the output power of the laser 1 according to the self-checking result of the computer 8. Specifically, the LOG record is stored in the computer 8, the LOG record includes an initial value of a marking parameter, a marking parameter when the laser 1 is marking is set in the marking controller 7, when the actual power exceeds the power setting range, the computer 8 performs self-checking on the actual marking parameter according to the LOG record, and if it is detected that the marking parameter is not artificially modified, the output power of the laser is adjusted through the marking controller 7; if the marking parameter is detected to be artificially modified, the marking parameter needs to be modified to an initial value, namely, a value consistent with the initial value of the marking parameter in the LOG record.
Of course, the computer 8 may limit the number of times of adjusting the output power of the laser 1, for example, the number of times is set to 3, that is, after the marking controller 7 continuously adjusts the output power of the laser 1 for 3 times, if the actual power exceeds the power setting range, the marking controller 7 stops to alarm. It is understood that the number of times is not limited to 3, for example, 4 or 5, and the invention is not limited thereto.
The LOG record further includes self-inspection data of the marking controller 7 and the light emitting panel of the laser 1, and may also include self-inspection data of all components of the device in the laser power test adjustment process, and the self-inspection data may be uploaded to the computer 8 and automatically generate a LOG record, so that when the device is abnormal, that is, the actual power exceeds the power setting range, the computer 8 may quickly lock a cause of instability of the laser light emitted by the laser 1 through the LOG record. Therefore, the detection and adjustment of the power are not only specific to the laser 1, but all the components can find and intercept the power in time through the scheme as long as the size and the stability of the power output are influenced.
According to the laser power detection and adjustment device provided by the invention, the laser 1 is used for emitting laser; the half-wave plate 2 is used for adjusting the optical path difference between the vertical direction o light and the horizontal direction e light of the laser; the depolarization spectroscope 3 is used for adjusting the polarization state of the laser to divide the laser into two beams according to a fixed energy proportion, wherein one beam of laser directly marks a product; the power sensor 6 is used for receiving another laser beam and transmitting the actual power of the laser beam to the computer 8; the computer 8 is used for comparing the actual power with the power setting range, if the actual power is not beyond the power setting range, the product is marked continuously, if the actual power is beyond the power setting range, the computer 8 adjusts the output power of the laser 1 according to a linear graph of the power and the duty ratio, the stability of laser power output is guaranteed, the consistency of the printing depth of the device is guaranteed, the probability of laser heat damage to the product is reduced, and NG products caused by printing are reduced, so that the production yield of the product is integrally improved. Meanwhile, the energy proportion of the laser beam for detection is only 1%, so that the laser marking is not influenced.
Correspondingly, the invention also provides a laser power detection and adjustment method, which adopts the laser power detection and adjustment device to detect and adjust the laser power. The laser power detection and adjustment method provided by the invention comprises the following steps:
step S1: testing the power of laser output by a laser to obtain a linear graph of the power and the duty ratio;
step S2: the half-wave plate adjusts the optical path difference between the o light in the vertical direction and the e light in the horizontal direction of the laser, and the depolarization spectroscope adjusts the polarization state of the laser to divide the laser into two beams according to a fixed energy proportion, wherein one beam of laser directly marks a product;
step S3: the power sensor receives another laser beam and transmits the actual power of the laser beam to the computer;
step S4: and the computer compares the actual power with a power setting range, if the actual power does not exceed the power setting range, the computer continues marking the product, and if the actual power exceeds the power setting range, the computer adjusts the output power of the laser according to a linear graph of the power and the duty ratio.
Please refer to fig. 1 to fig. 3 for a detailed description of a laser power detection and adjustment method according to an embodiment of the present invention.
In step S1, the power of the laser light output by the laser 1 is tested, and a linear graph of power versus duty cycle is obtained. For example: the output power of the laser 1 is tested every third or fifth percent, and a linear graph of power and duty ratio is generated as a reference basis for subsequent adjustment. Fig. 4 is a linear graph of the relationship between the power and the duty ratio of the laser according to an embodiment of the present invention, as shown in fig. 4, the abscissa represents the power, the ordinate represents the duty ratio, and the relationship between the power and the duty ratio is generally a linear relationship.
In step S2, the half-wave plate 2 adjusts the optical path difference between the o light in the vertical direction and the e light in the horizontal direction of the laser, and the depolarizing beam splitter 3 adjusts the polarization state of the laser to divide the laser into two beams according to a fixed energy ratio, wherein one beam of the laser directly marks the product.
Specifically, the combination of the half-wave plate 2 and the depolarizing beam splitter 3 is adopted, and the polarization state of the laser is adjusted by adjusting the optical path difference between the o light in the vertical direction and the e light in the horizontal direction of the laser, so that the stability of the light splitting energy ratio is ensured, and the measurement accuracy is ensured. The depolarization spectroscope 3 divides laser into two beams of transmission laser 4 and reflection laser 5, and one beam of laser with large energy ratio is adopted for marking a product. In this embodiment, the fixed energy ratio includes 1:99, but may be 1:97, 1:95, or any other ratio.
In step S3, the power sensor 6 receives another laser beam and transmits the actual power of the laser beam to the computer 8.
Specifically, the power sensor 6 may receive the actual power of the laser in real time and transmit the actual power to the computer 8, or may receive the actual power of the laser at a certain interval and transmit the actual power to the computer 8.
In step S4, the computer 8 compares the actual power with a power setting range, if the actual power does not exceed the power setting range, the marking of the product is continued, and if the actual power exceeds the power setting range, the computer 8 adjusts the output power of the laser 1 according to a linear graph of the power and the duty ratio.
Specifically, the LOG record is stored in the computer 8, the LOG record includes an initial value of the marking parameter, the initial value of the marking parameter is a marking value obtained when a marking test is performed on a product, the initial value of the marking parameter includes a marking power setting range, that is, a range suitable for a laser power for marking, and if the marking power setting range is exceeded, marking may fail or be abnormal. And the marking controller 7 is internally provided with marking parameters when the laser 1 is marking, namely actual marking parameters.
The computer 8 compares the actual power with a power setting range, if the actual power does not exceed the power setting range, the product is marked continuously, if the actual power exceeds the power setting range, the computer 8 carries out self-checking on marking parameters according to LOG records, and if the marking parameters are not detected to be artificially modified, the output power of the laser 1 is adjusted through the marking controller 7; if the marking parameter is detected to be artificially modified, the marking parameter needs to be modified to an initial value.
Preferably, the LOG record further includes self-inspection data of the marking controller 7 and the light emitting panel of the laser 1. The laser power test and adjustment method may also include self-inspection data of all components of the device during the laser power test and adjustment process, and the self-inspection data is uploaded to the computer 8 and automatically generates a LOG record, so that when the device is abnormal, that is, when the actual power exceeds the power setting range, the computer 8 can quickly lock the cause of instability of the laser emitted by the laser 1 through the LOG record. Therefore, the detection and adjustment of the power are not only specific to the laser 1, but all the components can find and intercept the power in time through the scheme as long as the size and the stability of the power output are influenced.
In summary, in the laser power detection and adjustment apparatus and method provided by the present invention, the power of the laser output by the laser is first tested to obtain a linear graph of the power and the duty ratio; then, the optical path difference between o light in the vertical direction and e light in the horizontal direction of the laser is adjusted through a half-wave plate, and a polarization state of the laser is adjusted by a depolarization spectroscope to be divided into two beams according to a fixed energy proportion, wherein one beam of the laser directly marks a product; the power sensor receives another laser beam and transmits the actual power of the laser beam to the computer; the computer compares the actual power with the power setting range, if the actual power does not exceed the power setting range, the product is marked continuously, if the actual power exceeds the power setting range, the computer adjusts the output power of the laser according to the line graph of the power and the duty ratio, the stability of the output of the laser power is guaranteed, the consistency of the printing depth of the product is guaranteed, the probability that the product is damaged by the laser heat is reduced, and the NG product caused by printing is reduced, so that the production yield of the product is integrally improved.
The above description is only for the purpose of describing the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and any variations and modifications made by those skilled in the art based on the above disclosure are intended to fall within the scope of the appended claims.
Claims (10)
1. A laser power detection and adjustment method is characterized by comprising the following steps:
testing the power of laser output by a laser to obtain a linear graph of the power and the duty ratio;
the half-wave plate adjusts the optical path difference between the o light in the vertical direction and the e light in the horizontal direction of the laser, and the depolarization spectroscope adjusts the polarization state of the laser to divide the laser into two beams according to a fixed energy proportion, wherein one beam of laser directly marks a product;
the power sensor receives another laser beam and transmits the actual power of the laser beam to the computer; and
and the computer compares the actual power with a power setting range, if the actual power does not exceed the power setting range, the product is marked continuously, and if the actual power exceeds the power setting range, the computer adjusts the output power of the laser according to a linear graph of the power and the duty ratio.
2. The method of claim 1, wherein the fixed energy ratio comprises 1:99, the energy ratio of the laser for marking the product is 99%.
3. The method for detecting and adjusting laser power according to claim 1, wherein if the actual power exceeds the power setting range, the method further comprises:
the computer carries out self-checking on the marking parameters according to the LOG record, and if the marking parameters are not artificially modified, the output power of the laser is adjusted through a marking controller; if the marking parameters are detected to be artificially modified, the marking parameters need to be modified to initial values;
the initial values of the marking parameters are parameters obtained when a product is subjected to marking test, the LOG records contain the initial values of the marking parameters, and the LOG records are stored in the computer.
4. The laser power detection and adjustment method according to claim 3, wherein after the number of times of adjusting the output power of the laser by the marking controller exceeds 3 times, if the actual power exceeds the power setting range again, the marking controller stops alarming.
5. The laser power detection adjustment method of claim 3, wherein the LOG record further comprises self-test data of the marking controller and the laser light extraction panel.
6. A laser power detection and adjustment device, comprising:
a laser for emitting laser light;
the half-wave plate is used for adjusting the optical path difference between the vertical direction o light and the horizontal direction e light of the laser;
the depolarization spectroscope is used for adjusting the polarization state of the laser to divide the laser into two beams according to a fixed energy proportion, wherein one beam of laser directly marks a product;
the power sensor is used for receiving another laser beam and transmitting the actual power of the laser beam to the computer; and
and the computer is used for comparing the actual power with a power setting range, continuously marking the product if the actual power is not beyond the power setting range, and adjusting the output power of the laser according to a linear graph of the power and the duty ratio if the actual power is beyond the power setting range.
7. The laser power detection and adjustment device according to claim 6, wherein the computer is further configured to perform a self-test on the marking parameters according to LOG records, and detect whether the marking parameters are modified manually;
the LOG record comprises an initial value of the marking parameter, the initial value of the marking parameter is a parameter obtained when a marking test is carried out on a product, and the LOG record is stored in the computer.
8. The laser power detection and adjustment device as claimed in claim 7, further comprising a marking controller for adjusting the output power of the laser according to the self-test result of the computer.
9. The laser power detection adjustment apparatus of claim 8, wherein the LOG record further comprises self-test data of the marking controller and the laser light extraction panel.
10. The laser power detection adjustment apparatus of claim 6, wherein the laser comprises a fiber laser, a CO2A laser, a solid state laser, a green laser, or an ultraviolet laser.
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| CN202210694362.XA CN114784610A (en) | 2022-06-20 | 2022-06-20 | Laser power detection and adjustment device and method |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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