CN211374541U - Detection system for laser lath and heat sink welding surface of solid laser - Google Patents
Detection system for laser lath and heat sink welding surface of solid laser Download PDFInfo
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- CN211374541U CN211374541U CN201921827693.6U CN201921827693U CN211374541U CN 211374541 U CN211374541 U CN 211374541U CN 201921827693 U CN201921827693 U CN 201921827693U CN 211374541 U CN211374541 U CN 211374541U
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Abstract
The utility model discloses a detection system for laser lath and heat sink welding surface of solid laser, the utility model has the advantages that the surface of one side of the laser lath connected with the heat sink is sequentially plated with an optical film and a metal film, the surface of one side of the heat sink connected with the laser lath is provided with gold plating, and the heat sink is connected with the laser lath by welding; the laser emitter is used for irradiating preset laser on the metal film; and the detector is used for detecting the welding surface of the laser lath and the heat sink according to the preset laser reflected by the metal film after the laser emitter irradiates the preset laser on the metal film for a preset time. That is to say, the utility model discloses a come to realize non-contact measurement to laser lath and heat sink's face of weld through laser, avoid causing pollution or damage to laser lath in the measurement process, and the utility model discloses easy operation is convenient for realize.
Description
Technical Field
The utility model relates to a laser instrument technical field especially relates to a detection system to solid laser's laser lath and heat sink face of weld.
Background
The laser slab package of the solid laser is generally implemented by using soft solder such as indium, gold tin, and the like. In the indium welding process, on one hand, when the solder is molten, the strip is quickly pressed down to the upper surface of the heat sink due to the action of gravity, and the molten indium solder is irregularly extruded out from between the laser strip and the heat sink, so that the indium thickness of a welding layer is uneven, and the heat dissipation of the solid laser strip module is uneven; on the other hand, the indium layer on the heat sink is partially contacted with the strip, air enclosed between the indium layer and the strip cannot be exhausted, and after the indium layer is melted and the melted indium is cooled, the air is left in the welding layer to form holes, so that the solid laser strip module is uneven in heat dissipation, and the beam quality of the solid laser strip module is seriously affected. Both of these cases are more pronounced for large size (. gtoreq.100 mm2) crystal slats.
Therefore, the quality detection of the welding surface between the strip and the heat sink is indispensable, and unqualified products can be screened through the detection of the welding surface, and a reference is provided for the improvement of the welding process. The currently available method for detecting the quality of the welding surface of the single-side welded strip and the heat sink is ultrasonic detection, but the ultrasonic detection cannot give quantitative results, and more difficult to accept, the ultrasonic detection needs to immerse the strip and the heat sink in water, which can cause serious influence on an optical film on the strip, so that the ultrasonic detection can be carried out only by using a sample, and the formal welding surface of the strip and the heat sink cannot be detected.
Disclosure of Invention
The utility model provides a detecting system to solid laser's laser lath and heat sink face of weld to solve among the prior art and easily cause the problem of influence to the blooming on the lath through supersound detection laser lath and heat sink face of weld.
The utility model provides a detection system to solid laser's laser lath and heat sink face of weld, include: the surface of one side, connected with a heat sink, of the laser slab is sequentially plated with an optical film and a metal film, the surface of one side, connected with the laser slab, of the heat sink is plated with gold, and the heat sink is connected with the laser slab through welding;
the laser emitter is used for irradiating preset laser on the metal film;
and the detector is used for detecting the welding surface of the laser lath and the heat sink according to the preset laser reflected by the metal film after the laser emitter irradiates the preset laser on the metal film for a preset time.
Preferably, the system further comprises: the laser emitter is a heating laser emitter;
the heating laser emitter is used for irradiating heating laser on the metal film;
the polaroid and the quarter-wave plate are used for filtering the heating laser reflected by the metal film;
the detector is also used for detecting the welding surface of the laser lath and the heat sink according to the filtered heating laser after the heating laser irradiates the metal film for a preset time.
Preferably, the system further comprises: and the lens is used for collimating the filtered preset laser and irradiating the collimated heating laser onto the detector.
Preferably, the system further comprises: detecting a laser emitter;
the detection laser emitter is used for irradiating the detection laser on the heated metal film after the heating laser emitter heats the metal film for a preset time;
the detector is also used for detecting the welding surface of the laser lath and the heat sink according to the detection laser reflected by the metal film.
Preferably, the system further comprises: a polarizer and a quarter-wave plate;
the polaroid and the quarter-wave plate are used for filtering the detection laser reflected by the metal film;
the detector is also used for detecting the welding surface of the laser lath and the heat sink according to the filtered detection laser.
Preferably, the system further comprises: and the lens is used for collimating the filtered detection laser and irradiating the collimated detection laser onto the detector.
Preferably, the laser transmitter is a solid state laser or a fiber laser.
Preferably, the detector emits light by a solid laser, an optical fiber laser, a diode laser or a gas laser;
wherein the wavelength of the detection laser emitted by the solid laser is 1064nm, 1030nm, 532nm or 515 nm;
the wavelength of detection laser emitted by the optical fiber laser is 1030nm-1080nm, and the output power is 1 mW-10W;
the wavelength of detection laser emitted by the diode laser is 630-1064 nm, and the output power is 1 mW-1W;
the wavelength of the detection laser emitted by the gas laser is 632.8nm, and the output power is 1mW-30 mW.
Preferably, the optical film is a silicon dioxide film with the thickness of 2-5 μm.
Preferably, a protective film is plated on the surface of the other side, connected with the heat sink, of the laser batten, and the thickness of the protective film is 2-5 microns.
The utility model discloses beneficial effect as follows:
the utility model discloses a laser comes to realize non-contact measurement to the face of weld of laser lath and heat sink, avoids causing the pollution or damage to the laser lath in the measurement process, and the utility model discloses easily the operation is convenient for realize.
Drawings
Fig. 1 is a schematic structural diagram of a system for detecting a laser slab and a heat sink welding surface of a solid-state laser according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another detection system for a laser slab and a heat sink welding surface of a solid-state laser according to an embodiment of the present invention.
Detailed Description
In order to solve among the prior art through the problem that the ultrasonic detection laser lath easily causes the influence with the optical film on the board strip with heat sink weld face, the utility model provides a to the detection method of the laser lath of solid laser and heat sink weld face, come to realize non-contact measurement to the laser lath and heat sink weld face through laser, avoid causing the pollution or damage to the laser lath in the measurement process. The present invention will be described in further detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention.
The embodiment of the utility model provides a detection system to solid laser's laser lath and heat sink face of weld, this system includes: the surface of one side, connected with a heat sink, of the laser slab is sequentially plated with an optical film and a metal film, the surface of one side, connected with the laser slab, of the heat sink is plated with gold, and the heat sink is connected with the laser slab through welding;
the laser emitter is used for irradiating preset laser on the metal film;
and the detector is used for detecting the welding surface of the laser lath and the heat sink according to the preset laser reflected by the metal film after the laser emitter irradiates the preset laser on the metal film for a preset time.
That is to say, the embodiment of the utility model provides a come to realize non-contact measurement to the face of weld of laser lath and heat sink through laser to avoid ultrasonic testing to cause pollution or damage to the laser lath in the measurement process.
In specific implementation, the system further comprises: the laser emitter is a heating laser emitter;
the heating laser emitter is used for irradiating heating laser on the metal film;
the polaroid and the quarter-wave plate are used for filtering the heating laser reflected by the metal film;
and the lens is used for collimating the filtered preset laser and irradiating the collimated heating laser onto the detector.
The detector is also used for detecting the welding surface of the laser lath and the heat sink according to the filtered heating laser after the heating laser irradiates the metal film for a preset time.
In addition, when specifically implementing, the embodiment of the utility model provides a system still includes: detecting a laser emitter;
the detection laser emitter is used for irradiating the detection laser on the heated metal film after the heating laser emitter heats the metal film for a preset time;
the detector is also used for detecting the welding surface of the laser lath and the heat sink according to the detection laser reflected by the metal film.
The system further comprises: a polarizer and a quarter-wave plate;
the polaroid and the quarter-wave plate are used for filtering the detection laser reflected by the metal film;
and the lens is used for collimating the filtered detection laser and irradiating the collimated detection laser onto the detector.
The detector is also used for detecting the welding surface of the laser lath and the heat sink according to the filtered detection laser.
The utility model discloses detection method includes following step:
the surface of the laser lath connected with the heat sink is plated with an optical film and a metal film;
the surface of the heat sink is plated with gold, and the interior of the heat sink is provided with a red copper heat sink with a micro-channel water cooling structure;
the welding layer is indium, gold tin, liquid metal and the like;
heating laser is irradiated on a metal film of a laser lath, the resolution is adjusted by controlling the spot size of the heating laser, and the power of the heating laser is controlled to control the temperature of a heating point;
irradiating detection laser on the heating point, and reflecting the detection laser by using a gold-plated layer of the strip;
and measuring the reflected detection light by using a detector, and recording the detection light intensity or direction variation after passing through the heating point, wherein the welding quality corresponding to the position with large variation is poor.
And moving a laser module consisting of the laser strip and the heat sink, irradiating the heating laser and the detection laser on different positions of the laser strip point by point, recording the detection light variation of each point, and finally synthesizing a two-dimensional graph reflecting the quality of the whole welding surface.
The embodiment of the utility model provides a will heat laser irradiation after heating scheduled time on the metallic membrane, it is right through polaroid and quarter wave plate the heating laser of metallic membrane reflection filters to it is right according to the heating laser after filtering through the detector the laser lath with the face of weld of heat sink detects, specifically as shown in figure 1.
That is to say, the embodiment of the present invention can only set up the effect that heating laser realized heating and detection simultaneously. And the heating laser reflected by the metal film is filtered through the polaroid and the quarter-wave plate, so that the detector can detect the heating laser, and the detection of the welding surface is realized.
Additionally, the embodiment of the utility model provides a also can set up a branch of heating laser and heat the face of weld to detect the face of weld through a branch of special detection laser. Specifically, the embodiment of the utility model provides a will heat laser irradiation and heat behind the last heating scheduled time of metallic film, will survey laser irradiation and on the metallic film after the heating, it is right according to the reflected detection laser of metallic film after the heating the laser lath with the face of weld of heat sink detects, specifically as shown in figure 2.
When specifically implementing, the embodiment of the utility model provides an in, it is right according to the detection laser of the metallic film reflection after the heating the laser lath with heat sink's face of weld detects, include: and filtering the detection laser reflected by the metal film through a polaroid and a quarter-wave plate, and detecting the welding surface of the laser slab and the heat sink through the filtered detection laser.
It should be noted that the heating laser according to the embodiment of the present invention adopts a solid laser, and the wavelength is 1064nm, 1030nm, 532nm or 515 nm; or the heating laser is a fiber laser with the wavelength of 1030nm-1080 nm.
The detection laser is a solid laser, an optical fiber laser, a diode laser or a gas laser;
wherein the wavelength of the solid laser is 1064nm, 1030nm, 532nm or 515 nm;
the wavelength of the optical fiber laser is 1030nm-1080nm, and the output power is 1 mW-10W;
the wavelength of the diode laser is 630-1064 nm, and the output power is 1 mW-1W;
the wavelength of the gas laser is 632.8nm, and the output power is 1mW-30 mW.
In specific implementation, in the embodiment of the present invention, the optical film is a silicon dioxide film, and the thickness is 2 to 5 μm.
In particular implementation, the method according to the embodiment of the present invention further includes: and plating a protective film on the surface of the other side, connected with the heat sink, of the laser panel, wherein the thickness of the protective film is 2-5 microns.
It should be noted that, the embodiment of the present invention provides a titanium-gold film as the metal film, wherein the thickness of the titanium film is 100-300 nm, and the thickness of the gold film is 300-800 nm.
The present invention will be described in detail below by means of several specific examples:
in a first specific embodiment, as shown in fig. 1, a heating laser 2 in an embodiment of the present invention is a laser with a power of 10W and a wavelength of 1064nm, and is focused into a 0.2mm light spot through a lens 9 to irradiate on a metal film 5 on the lower surface of a laser slab 4 and the upper surface of a welding layer 6 on a heat sink 7; the detection laser 1 uses laser with the power of 30mW and the wavelength of 532nm, the irradiation light spot is 0.5mm through the lens 8, the detection laser and the heating laser 2 light spot after passing through the lens 10 are concentric, and the included angle of the optical axis is 5 degrees; the detector 3 is a photodiode; the laser slab 4 is a Nd: YAG crystal slab, the size is 3mm multiplied by 40mm multiplied by 140mm, the optical film thickness of the Nd: YAG crystal slab is 4 mu m, the metal titanium film thickness in the metal film 6 is 300nm, the gold film thickness is 5nm, the welding indium layer thickness is 40 mu m, the area is 38mm multiplied by 120mm, the welding surface is divided into 38 multiplied by 120 dot matrixes, each dot is measured respectively, only the detection laser 1 is started firstly, the reflection light intensity at the moment is recorded through the detector 3, then the heating laser 2 is started to 10W, the heating laser 2 is closed after 0.5s, the detector 3 records the maximum light intensity variation, and the measuring process is finished after each measuring point of the welding surface is measured.
In a second specific embodiment, the heating laser in the embodiment of the present invention is a laser with a power of 100W and a wavelength of 940nm, and irradiates into a 0.8mm light spot through a lens, and irradiates on the metal film on the lower surface of the laser lath; the power of the detection laser is 1W, the wavelength of the laser is 1064nm, an irradiation light spot is 1mm through a lens, the irradiation light spot is concentric with a heating laser light spot, and the included angle of an optical axis is 10 degrees; the detector is a laser power meter; the laser slab is a Yb-YAG composite structure crystal slab, the size is 2mm multiplied by 10mm multiplied by 50mm, the doping area is positioned at the lower part of the slab, the size is 0.3mm multiplied by 10mm multiplied by 40mm, the optical film thickness of the lower surface of the Yb-YAG composite structure crystal slab is 3 mu m, the metal titanium film thickness is 100nm, the gold film thickness is 500nm, the thickness of a welding indium layer is 100 mu m, the area is 9mm multiplied by 46mm, heat sink water is introduced, a welding surface is divided into 5 multiplied by 20 dot matrixes, each point is respectively measured, firstly, the laser is detected, the reflected light intensity is recorded through a detector, then the heating laser is started to 100W, the heating laser is closed after 0.2s, the detector records the maximum light intensity variation, and after each measuring point of the welding surface is measured.
In a third specific embodiment, as shown in fig. 2, the heating laser 1 of the embodiment of the present invention is linearly polarized laser with a power of 20W and a wavelength of 1064nm, and is changed into circularly polarized light after passing through the polarizer 11 and the quarter-wave plate 12, and is irradiated into a 0.5mm light spot through the lens 8 and irradiated onto the metal film on the lower surface of the laser slat; the laser beam returns from the original path after being reflected by the metal film, is collimated by the lens 8, passes through the quarter-wave plate 12, is in a polarization state perpendicular to the original laser beam, is reflected by the polaroid and enters the detector 3, and the detector 3 is a photodiode; the laser lath is an Nd: YVO4 crystal lath, the size is 1mm multiplied by 10mm multiplied by 14mm, the optical film thickness of the Nd: YVO4 crystal lath is 2 mu m, the titanium film thickness of the metal film 5 is 100nm, the gold film thickness is 400nm, the thickness of the welding indium layer is 80 mu m, the area is 9mm multiplied by 12mm, the welding surface is divided into 9 multiplied by 12 lattices, each point is measured respectively, firstly, the heat laser 1 is started, the reflected light intensity at the moment is recorded through the detector 3, then, the heating laser 1 is started to 20W, the heating laser 1 is closed after 0.3s, the detector 3 records the maximum light intensity variation, and after each measuring point of the welding surface is measured, the measuring process is finished.
The utility model discloses to the laser lath and the heat sink face of weld detection method of solid laser, not only can realize non-contact measurement, avoid causing pollution or damage to the laser lath in the measurement process; and the heat conduction coefficient of the welding surface is linked with the variation of the detection light, so that the heat conduction capability of each point of the welding surface can be quantitatively analyzed, and the establishment of the temperature field distribution of the dynamic working state of the laser lath is facilitated. The utility model discloses easily operation and realization.
Overall, the utility model provides a technical problem that solve provides a jumbo size laser lath and heat sink face of weld detection method, shine the gilt with a branch of laser, generate heat after the gilt metal absorbs the laser, the heat will produce a temperature field behind the laser lath is inside, shine at this region through another bundle of detection laser, utilize gilt reflection probing light, because the different temperature zone's of laser lath refracting index is different, so can make detection laser divergence angle or direction change, the laser light intensity that gets into the detector through the aperture can change, record this change and just can reflect the measuring point temperature, the welding layer defect is big more, the heat is difficult to conduct heat sink the inside more, the temperature is high more in the laser lath, consequently, the welding layer quality can be reflected to the temperature of measuring point.
The utility model aims to provide a jumbo size laser lath and heat sink face of weld detection method, this method can realize non-contact measurement, avoids causing the pollution or damage to the laser lath in the measurement process. Additionally, the utility model discloses a link up weld face heat conduction coefficient and detecting light variation volume, heat-transfer ability that can quantitative analysis weld face every point helps establishing the temperature field distribution of laser lath dynamic operating condition.
The embodiment of the utility model provides a detection system to laser lath and heat sink welding face of solid laser, wherein, the surface of the laser lath that the utility model provides a side is connected with the heat sink has plated optical film and metallic film in proper order, the surface of the heat sink that is connected with the laser lath has plated the gold membrane;
the utility model discloses detecting system includes:
the laser emitter is used for irradiating preset laser on the metal film;
the polaroid and the quarter-wave plate are used for filtering preset laser reflected by the metal film;
the lens is used for collimating the filtered preset laser and irradiating the laser onto the detector;
and the detector is used for detecting the welding surface of the laser lath and the heat sink according to the preset laser irradiated by the lens after the preset laser is irradiated on the metal film for a preset time.
The utility model discloses a laser comes to realize non-contact measurement to the face of weld of laser lath and heat sink, avoids causing the pollution or damage to the laser lath in the measurement process, and the utility model discloses easily the operation is convenient for realize.
The relevance of the system embodiments can be understood with reference to the method embodiments and will not be discussed in detail here.
Although the preferred embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, and that the scope of the present invention is not limited to the embodiments disclosed.
Claims (9)
1. A system for detecting a laser slab and heat sink bonding surface of a solid state laser, comprising: the surface of one side, connected with a heat sink, of the laser slab is sequentially plated with an optical film and a metal film, the surface of one side, connected with the laser slab, of the heat sink is plated with gold, and the heat sink is connected with the laser slab through welding;
the laser emitter is used for irradiating preset laser on the metal film;
and the detector is used for detecting the welding surface of the laser lath and the heat sink according to the preset laser reflected by the metal film after the laser emitter irradiates the preset laser on the metal film for a preset time.
2. The system of claim 1, further comprising: the laser emitter is a heating laser emitter;
the heating laser emitter is used for irradiating heating laser on the metal film;
the polaroid and the quarter-wave plate are used for filtering the heating laser reflected by the metal film;
the detector is also used for detecting the welding surface of the laser lath and the heat sink according to the filtered heating laser after the heating laser irradiates the metal film for a preset time.
3. The system of claim 2, further comprising:
and the lens is used for collimating the filtered preset laser and irradiating the collimated heating laser onto the detector.
4. The system of claim 2, further comprising: detecting a laser emitter;
the detection laser emitter is used for irradiating the detection laser on the heated metal film after the heating laser emitter heats the metal film for a preset time;
the detector is also used for detecting the welding surface of the laser lath and the heat sink according to the detection laser reflected by the metal film.
5. The system of claim 2, further comprising:
and the lens is used for collimating the filtered detection laser and irradiating the collimated detection laser onto the detector.
6. The system according to any one of claims 1-5,
the laser transmitter is a solid laser or a fiber laser.
7. The system according to any one of claims 1-5,
the detector emits light by a solid laser, an optical fiber laser, a diode laser or a gas laser;
wherein the wavelength of the detection laser emitted by the solid laser is 1064nm, 1030nm, 532nm or 515 nm;
the wavelength of detection laser emitted by the optical fiber laser is 1030nm-1080nm, and the output power is 1 mW-10W;
the wavelength of detection laser emitted by the diode laser is 630-1064 nm, and the output power is 1 mW-1W;
the wavelength of the detection laser emitted by the gas laser is 632.8nm, and the output power is 1mW-30 mW.
8. The system according to any one of claims 1-5,
the optical film is a silicon dioxide film, and the thickness of the optical film is 2-5 mu m.
9. The system according to any one of claims 1-5,
and a protective film is plated on the surface of the other side, connected with the heat sink, of the laser batten, and the thickness of the protective film is 2-5 microns.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110702689A (en) * | 2019-10-29 | 2020-01-17 | 中国电子科技集团公司第十一研究所 | Detection system for laser lath and heat sink welding surface of solid laser |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110702689A (en) * | 2019-10-29 | 2020-01-17 | 中国电子科技集团公司第十一研究所 | Detection system for laser lath and heat sink welding surface of solid laser |
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