CN112108775A - Device and method for controlling lasers in parallel and laser marking machine - Google Patents
Device and method for controlling lasers in parallel and laser marking machine Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
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Abstract
The invention relates to a device and a method for controlling laser in parallel and a laser marking machine, wherein when a laser head and a printed material move horizontally relatively, the laser head emits a laser beam with a cross section in a shape of a word line, and an acousto-optic regulator periodically modulates and intervenes a local laser beam of the laser beam according to a first printing instruction generated by a preset printing pattern so as to change the irradiation direction of the local laser beam.
Description
Technical Field
The invention relates to the technical field of laser printing, in particular to a device and a method for controlling lasers in parallel and a laser marking machine.
Background
At present, laser marking machine is through carrying out image processing to predetermineeing the printing pattern, that is to predetermineeing the printing pattern and decompose into a plurality of printing points according to predetermineeing interval density, wherein, predetermineeing interval density and can set up and divide into 1000 printing points etc. on 1cm length, laser marking machine's laser head when with stock relative horizontal motion, prints point by point, specifically: when any line is printed, if the point to be printed is a printing point, the laser head is controlled to emit a laser beam to the printing stock to burn the printing stock, if the point to be printed is not a printing point, the laser head is controlled not to emit a laser beam to the printing stock, namely, the printing stock is not burned, then the next line of printing is carried out until the preset printing pattern is printed on the printing stock, and the printing efficiency is low because the point is printed line by line.
Disclosure of Invention
The invention aims to solve the technical problem of the prior art and provides a device and a method for controlling lasers in parallel and a laser marking machine.
The technical scheme of the device for controlling the laser in parallel is as follows:
comprises an acousto-optic regulator and a laser head;
the laser head is used for emitting a laser line beam of a laser spot with a cross section in a shape of a line when the laser head moves horizontally relative to a printing stock, and the extension direction of the shape of the line of the laser spot is vertical to the direction of the horizontal movement of the laser head relative to the printing stock;
the acousto-optic regulator is used for periodically modulating and interfering local laser beams of the laser beams according to a first printing instruction generated by the preset printing pattern so as to change the irradiation direction of the local laser beams and prevent the modulated and interfered local laser beams from irradiating the printing stock until the preset printing pattern is printed on the printing stock.
The device for controlling the laser in parallel has the following beneficial effects:
when the laser head and the printing stock do relative horizontal motion, the laser head emits a laser line beam with a cross section in a shape of a word line to the printing stock, the acousto-optic regulator periodically modulates and intervenes a local laser line beam of the laser line beam according to a first printing instruction generated by the preset printing pattern so as to change the irradiation direction of the local laser line beam, and the cross section of the laser line beam is in the shape of the word line laser spot, so that the whole line printing can be performed at the moment, specifically: when any line is printed, the acousto-optic regulator does not modulate and intervene the laser line beam at the position corresponding to the printing point in the line, so that the laser line beam can be emitted to a printing stock to burn the printing stock, and the acousto-optic regulator can modulate and intervene the laser line beam at the position corresponding to the printing point in the line, so that the laser line beam cannot be irradiated to the printing stock, namely, the laser line beam is not burnt until the preset printing pattern is printed on the printing stock, namely, the device for controlling the laser in parallel can print the whole line on the printing stock without printing the point by point of each line, and compared with the traditional line-by-point printing mode, the printing efficiency is greatly improved.
On the basis of the above scheme, the device for controlling laser in parallel of the invention can be further improved as follows.
Further, the process of modulation intervention by the acousto-optic modulator comprises:
periodically generating modulated light according to the first print instruction;
and according to the generated modulated light each time, sequentially modulating and intervening local laser beams of the laser beams emitted by the laser head so as to change the irradiation direction of the local laser beams.
Further, a linear mirror for enabling the laser line beam emitted by the laser head to pass through is arranged between the printing stock and the laser head.
The beneficial effect of adopting the further scheme is that: the laser beam is emitted by the laser head and is divergent light, the length of the linear gap of the linear lens and the position between the printing stock and the laser head are accurately controlled, and the length of the laser beam irradiating the printing stock is accurately controlled.
Further, the laser system also comprises a metal plate used for receiving the local laser line beam irradiation after modulation and interference.
The beneficial effect of adopting the further scheme is that: and the local laser beam after modulation and drying is irradiated to the metal plate so as to prevent the local laser beam from damaging a user or other parts.
The technical scheme of the method for controlling the lasers in parallel is as follows:
the device for parallel control of the lasers is applied to any one of the devices and comprises:
s1, when the laser head moves horizontally relative to the printing stock, the laser head emits a laser line beam of a laser spot with a cross section in a linear shape to the printing stock, and the extension direction of the linear shape of the laser spot is perpendicular to the direction of the horizontal movement of the laser head relative to the printing stock;
s2, the acousto-optic regulator periodically modulates and intervenes on a local laser beam of the laser beam according to a first printing instruction generated by a preset printing pattern so as to change the irradiation direction of the local laser beam, and the local laser beam after modulation and intervention is prevented from irradiating the printing stock until the preset printing pattern is printed on the printing stock.
The method for controlling the lasers in parallel has the following beneficial effects:
when the laser head and the printing stock do relative horizontal motion, the laser head emits a laser line beam with a cross section in a shape of a word line to the printing stock, the acousto-optic regulator periodically modulates and intervenes a local laser line beam of the laser line beam according to a first printing instruction generated by the preset printing pattern so as to change the irradiation direction of the local laser line beam, and the cross section of the laser line beam is in the shape of the word line laser spot, so that the whole line printing can be performed at the moment, specifically: when any line is printed, the acousto-optic regulator does not modulate and intervene the laser line beam at the position corresponding to the printing point in the line, so that the laser line beam can be emitted to a printing stock to burn the printing stock, and the acousto-optic regulator can modulate and intervene the laser line beam at the position corresponding to the printing point in the line, so that the laser line beam cannot be irradiated to the printing stock, namely, the laser line beam is not burnt until the preset printing pattern is printed on the printing stock, namely, the method for controlling the laser in parallel can print the whole line on the printing stock without printing the point by point of each line, and compared with the traditional line-by-point printing mode, the printing efficiency is greatly improved.
On the basis of the above scheme, the method for controlling the lasers in parallel can be further improved as follows.
Further, the acousto-optic regulator periodically performs modulation intervention on a local laser beam of the laser beam according to a first printing instruction generated by the preset printing pattern so as to change the irradiation direction of the local laser beam, and the method comprises the following steps:
s20, periodically generating modulated light according to a first printing instruction generated by the preset printing pattern;
and S21, sequentially modulating and intervening local laser beams of the laser beams emitted by the laser head according to the generated modulated light to change the irradiation direction of the local laser beams.
The technical scheme of the laser marking machine comprises the following steps: the device for parallel control of the lasers comprises any one of the devices.
The laser marking machine has the beneficial effects that:
when the laser head and the printing stock do relative horizontal motion, the laser head emits a laser line beam with a cross section in a shape of a word line to the printing stock, the acousto-optic regulator periodically modulates and intervenes a local laser line beam of the laser line beam according to a first printing instruction generated by the preset printing pattern so as to change the irradiation direction of the local laser line beam, and the cross section of the laser line beam is in the shape of the word line laser spot, so that the whole line printing can be performed at the moment, specifically: when any line is printed, the acousto-optic regulator does not modulate and intervene the laser line beam at the position corresponding to the printing point in the line, so that the laser line beam can be emitted to a printing stock to burn the printing stock, and the acousto-optic regulator can modulate and intervene the laser line beam at the position corresponding to the printing point in the line, so that the laser line beam cannot be irradiated to the printing stock, namely, the laser line beam does not burn the printing stock until the preset printing pattern is printed on the printing stock, namely, the laser machine can print the whole line on the printing stock without printing the point by point of each line, and compared with the traditional line-by-point printing mode, the printing efficiency is greatly improved.
Drawings
Fig. 1 is a schematic structural diagram of an apparatus for controlling lasers in parallel according to an embodiment of the present invention;
fig. 2 is a flowchart illustrating a method for controlling lasers in parallel according to an embodiment of the present invention.
Detailed Description
As shown in fig. 1, an apparatus for controlling laser in parallel according to an embodiment of the present invention includes an acousto-optic modulator 1 and a laser head 2;
the laser head 2 is used for emitting a laser line beam 4 with a cross section in a linear shape to the printing stock 3 when the laser head and the printing stock 3 move horizontally relatively, and the extension direction of the linear shape of the laser line beam is vertical to the direction of the relative horizontal movement of the laser head 2 and the printing stock 3;
the acousto-optic regulator 1 is configured to periodically perform modulation intervention on a local laser beam 5 of the laser beam 4 according to a first printing instruction generated by the preset printing pattern to change an irradiation direction of the local laser beam 5, so as to prevent the modulated local laser beam 5 from irradiating on the printing stock 3 until the preset printing pattern is printed on the printing stock 3.
When the laser head 2 and the printing stock 3 make relative horizontal movement, the laser head 2 emits a laser beam 4 with a cross section in a shape of a word line to the printing stock 3, the acousto-optic regulator 1 periodically modulates and intervenes a local laser beam 5 of the laser beam 4 according to a first printing instruction generated by the preset printing pattern so as to change the irradiation direction of the local laser beam 5, and as the cross section of the laser beam 4 is in the shape of the word line, the whole line printing can be performed at the moment, specifically: when any line is printed, the acousto-optic regulator 1 does not modulate and interfere the laser line beam 4 at the position corresponding to the printing point in the line, so that the laser line beam can be emitted to the printing stock 3 to burn the printing stock 3, and the acousto-optic regulator 1 can modulate and interfere the laser line beam 4 at the position corresponding to the printing point in the line, so that the laser line beam cannot be irradiated to the printing stock 3, namely the laser line beam does not burn the printing stock 3 until the preset printing pattern is printed on the printing stock 3, namely, the device for controlling the laser in parallel can print on the printing stock 3 in a whole line without printing each line point by point, and compared with the traditional line-by-point printing mode, the printing efficiency is greatly improved.
The following examples are given by way of illustration, specifically: the preset printing pattern is a rectangular block with the size of 1cm multiplied by 2cm, the printing stock 3 is an A4 paper, and the specific implementation mode that the laser head 2 and the printing stock 3 do relative horizontal movement is as follows: the laser head 2 is not moved, the printing stock 3, namely the A4 paper, moves, and the preset interval density is set as follows: the length of 1cm is divided into 1000 printing points, the long side of a rectangular block is taken as the direction of the relative horizontal movement of the laser head 2 and the printing stock 3, 2000 rows are provided, and the number of the printing points is 2000 multiplied by 1000, so that:
1) according to the conventional line-by-line dot-by-dot printing method, when any line is printed, since the width of the a4 paper is 21cm, the total number of 21 × 1000 dots in the first line is determined, whether the dots to be printed are the printing dots is determined one by one, if yes, the printing is performed on the a4 paper, if not, whether the next dot to be printed is the printing dot is continuously determined, assuming that the time required for determining the dots to be printed one by one is the first time length T1, the time required for printing one printing dot is the second time length T2, and the time required for printing the preset printing pattern on the printing material 3 is: T1X 21X 1000X 29.7X 1000+ T2X 2000X 1000, wherein 29.7 means that the length of A4 paper is 29.7 cm;
2) when the device for controlling the lasers in parallel is applied, when any line is printed, the acousto-optic regulator 1 does not modulate and intervene the laser line beam 4 at the position corresponding to the printing point in the line, so that the laser line beam can be emitted to the printing stock 3 to burn the printing stock 3, and the acousto-optic regulator 1 modulates and intervenes the laser line beam 4 at the position corresponding to the printing point in the line, so that the laser line beam cannot be irradiated to the printing stock 3, namely the printing stock 3 is not burned; that is, in any row, it can be determined whether the dots to be printed are the printing dots in the same time period, i.e. the first time period T1, or the printing can be completed in the same time period, i.e. the second time period T2, and the time required for printing the preset printing pattern on the printing material 3 is as follows: compared with the conventional line-by-line dot-by-dot printing mode, the parallel laser control device has the advantages that the printing efficiency is greatly improved by T1X 29.7X 1000+ T2X 2000.
It is to be understood that the above examples are merely illustrative of one apparatus for parallel control of lasers of the present application and are not limiting in their only manner.
Wherein, another specific implementation mode that the laser head 2 and the printing stock 3 do relative horizontal motion is as follows: the laser head 2 moves, and the printing stock 3, namely A4 paper, is not moved, wherein the printing stock 3 can also be embossed paper, intaglio paper, newspaper, drawing paper and the like.
It should be noted that: the moving speed of the printing stock 3, namely the a4 paper, is related to the preset density for decomposing the preset printing pattern into a plurality of printing dots, for example, the preset interval density is 1000 printing dots in the length of 1cm, namely, the distance between two adjacent printing dots is 10 μm, that is, after printing the printing dots on one line, the a4 paper needs to be moved by 10 μm, and then the printing dots on the next line are printed, and the moving speed of the printing stock 3, namely the a4 paper can be obtained according to the stepping distance, namely 10 μm, and the time required for printing the printing dots on each line.
Periodicity can be understood as: when line-by-line printing is performed, because the positions of printing points in each line are different, the local laser beams 5 are also different, and the local laser beams 5 are periodically adjusted along with the line-by-line printing, so that the different local laser beams 5 are periodically modulated and intervened to change the irradiation direction of the local laser beams 5 according to an actual condition, namely a first printing instruction;
wherein the first print instruction is to be understood as: and carrying out digital image processing on the printed pattern to generate graphic data with corresponding resolution, namely graphic data formed by printing points or graphic data formed by printing points according to preset interval density, and when any line is printed, triggering the acousto-optic regulator 1 to modulate and intervene the laser beam 4 at the position corresponding to the printing point in the line, and not modulating and intervene the laser beam 4 at the position corresponding to the printing point in the line, so that the laser beam can be emitted to the printed material 3 to burn the printed material 3 until the preset printed pattern is printed on the printed material 3.
Preferably, in the above technical solution, the process of performing modulation intervention by the acousto-optic modulator 1 includes:
periodically generating modulated light 7 according to the first print instruction;
according to the modulated light 7 generated each time, the local laser beams 5 of the laser beams 4 emitted by the laser heads 2 are modulated and intervened in sequence to change the irradiation directions of the local laser beams 5.
By way of example, when the resolution of the preset print pattern is 200dpi, 200 dots are provided at a distance of 21cm or width of the printing material 3 such as a4 paper, and the distance between two adjacent dots in each row is 25.4/200 or 0.127mm, the acousto-optic modulator is required to modulate 210/0.127 or 1653 diffracted light rays or modulated light 7, and the width of each diffracted light ray or modulated light 7 is 0.127mm, so as to cover the width distance of the a4 paper, so as to ensure that the acousto-optic modulator 1 can modulate and interfere with the laser beam 4 at the corresponding position of any one of the printing points in any row through the diffracted light rays or modulated light 7. The working principle of the acousto-optic modulator is to utilize the characteristics of bragg diffraction generated by the acousto-optic effect to control the propagation direction of the laser beam 4, which is known by those skilled in the art and will not be described herein.
Preferably, in the above technical solution, a line mirror 8 for passing the laser beam 4 emitted by the laser head 2 is further disposed between the printing material 3 and the laser head 2.
The laser beam irradiation device comprises a laser head 2, a printed material 3 and a linear lens 8 arranged between the printed material 3 and the laser head 2, wherein the linear lens 8 is used for accurately controlling the linear gap 9 of the linear lens 8, so that the width of a laser beam 4 irradiated to the printed material 3 is accurately controlled, when the laser head 2 emits the laser beam 4 which is parallel light, the length of the linear gap 9 of the linear lens 8 is accurately controlled, so that the length of the laser beam 4 irradiated to the printed material 3 is accurately controlled, and when the laser beam 4 is emitted by the laser head 2, the length of the linear gap 9 of the linear lens 8 and the position between the printed material 3 and the laser head 2 are accurately controlled, so that the length of the laser beam 4 irradiated to the printed material 3 is accurately controlled.
Describing any example of a printing line, the laser head 2 emits a laser line beam 4 having a laser spot with a cross section in the shape of a straight line to the printing material 3, the laser line beam 4 passes through a straight line-shaped gap 9 of a straight line mirror 8, and then:
1) when the laser beam 4 emitted by the laser head 2 is parallel light, the length of the linear gap 9 of the linear lens 8 is accurately controlled, so that the length of the laser beam 4 irradiated to the printing stock 3 is accurately controlled, at the moment, the acousto-optic modulator emits modulated light 7 according to a first printing instruction, the local laser beam 5 of the laser beam 4 is modulated and intervened to change the irradiation direction of the local laser beam 5, and the rest laser beam 4, namely the target laser beam 6, can be irradiated on the printing stock 3 to be burned until the printing is completed, so that:
firstly, when the modulated lights 7 emitted by the acousto-optic modulator are all parallel lights, the sum of the widths of all the modulated lights 7 emitted by the acousto-optic modulator is equal to the width of the laser beam 4 and also equal to the width of the printing stock 3, wherein the width of the printing stock 3 is perpendicular to the direction of the relative horizontal movement of the laser head 2 and the printing stock 3.
When the modulated light 7 emitted by the acousto-optic modulator is all divergent light, the sum of the widths of the contact positions of all the modulated light 7 emitted by the acousto-optic modulator and the laser beam 4 is equal to the width of the laser beam 4 and is also equal to the width of the printing stock 3;
2) when the laser beam 4 emitted by the laser head 2 is divergent light, the width of the laser beam 4 irradiated to the printing stock 3 is accurately controlled by accurately controlling the length of the linear gap 9 of the linear lens 8, at the moment, the acousto-optic modulator emits modulated light 7 according to a first printing instruction, the local laser beam 5 of the laser beam 4 is modulated and intervened to change the irradiation direction of the local laser beam 5, and the rest laser beam 4, namely the target laser beam 6, can be irradiated on the printing stock 3 to be burnt until the printing is completed, so that:
firstly, when the modulation light 7 emitted by the acousto-optic modulator is parallel light, the sum of the widths of all the modulation light 7 emitted by the acousto-optic modulator is the same as the width of the laser line 4 at the position where all the modulation light 7 emitted by the acousto-optic modulator is contacted with the laser line 4, and the width of the laser line 4 irradiated on the printing stock 3 is the same as the width of the printing stock 3;
and secondly, when the modulation light 7 emitted by the acousto-optic modulator is all divergent light, the sum of the widths of all the modulation light 7 emitted by the acousto-optic modulator is the same as the width of the laser line 4 at the position where all the modulation light 7 emitted by the acousto-optic modulator is contacted with the laser line 4, and the width of the laser line 4 irradiated on the printing stock 3 is the same as the width of the printing stock 3.
Preferably, in the above technical solution, the laser device further comprises a metal plate for receiving the irradiation of the local laser beam 5 after the modulation and the drying.
The local laser beams 5 after modulation and drying are irradiated to a metal plate to prevent the local laser beams 5 from damaging a user or other parts, wherein the metal plate can be an aluminum plate, a steel plate and the like.
Wherein, can set up the support in order to realize the fixed to acousto-optic regulator 1, stock 3, laser head 2 and metal sheet, and laser head 2 can the direct mount on current laser marking machine to replace its original laser head 2.
As shown in fig. 2, a method for controlling laser beams in parallel according to the present invention is applied to any one of the above apparatuses for controlling laser beams in parallel, and includes:
s1, when the laser head 2 moves horizontally relative to the printing stock 3, the laser beam 4 with the cross section being a laser spot in a shape of a word line is emitted to the printing stock 3, and the extension direction of the shape of the word line of the laser spot is vertical to the direction of the relative horizontal movement of the laser head 2 and the printing stock 3;
s2, the acousto-optic modulator 1 periodically modulates and intervenes on the local laser beam 5 of the laser beam 4 according to a first printing instruction generated by a preset printing pattern to change the irradiation direction of the local laser beam 5, so as to prevent the modulated and interfered local laser beam 5 from irradiating on the printing material 3 until the preset printing pattern is printed on the printing material 3.
When the laser head 2 and the printing stock 3 make relative horizontal movement, the laser head 2 emits a laser beam 4 with a cross section in a shape of a word line to the printing stock 3, the acousto-optic regulator 1 periodically modulates and intervenes a local laser beam 5 of the laser beam 4 according to a first printing instruction generated by the preset printing pattern so as to change the irradiation direction of the local laser beam 5, and as the cross section of the laser beam 4 is in the shape of the word line, the whole line printing can be performed at the moment, specifically: when any line is printed, the acousto-optic regulator 1 does not modulate and interfere the laser line beam 4 at the position corresponding to the printing point in the line, so that the laser line beam can be emitted to the printing stock 3 to burn the printing stock 3, and the acousto-optic regulator 1 can modulate and interfere the laser line beam 4 at the position corresponding to the printing point in the line, so that the laser line beam cannot be irradiated to the printing stock 3, namely the laser line beam does not burn the printing stock 3 until the preset printing pattern is printed on the printing stock 3, namely, the method for controlling the laser in parallel can print on the printing stock 3 in a whole line without printing each line point by point, and compared with the traditional line-by-point printing mode, the printing efficiency is greatly improved.
Preferably, in the above technical solution, in S2, the periodically modulating and intervening the local laser beam 5 of the laser beam 4 according to the first print instruction generated by the preset print pattern by the acousto-optic modulator 1 to change the irradiation direction of the local laser beam 5 includes:
s20, periodically generating modulated light 7 according to the first printing instruction generated by the preset printing pattern;
and S21, sequentially modulating and interfering the local laser beams 5 of the laser beams 4 emitted by the laser head 2 according to the generated modulated light 7 to change the irradiation directions of the local laser beams 5.
In the above embodiments, although the steps are numbered as S1, S2, etc., but only the specific embodiments given in this application are provided, and those skilled in the art can adjust the execution sequence of S1, S2, etc. according to the actual situation, which is also within the protection scope of the present invention, and the above steps of implementing corresponding functions for each parameter and each unit module in the method for controlling laser in parallel according to the present invention can refer to each parameter and step in the above embodiments of an apparatus for controlling laser in parallel, which is not described herein again.
The laser marking machine provided by the embodiment of the invention comprises any one of the devices for controlling the laser in parallel.
When the laser head 2 and the printing stock 3 make relative horizontal movement, the laser head 2 emits a laser beam 4 with a cross section in a shape of a word line to the printing stock 3, the acousto-optic regulator 1 periodically modulates and intervenes a local laser beam 5 of the laser beam 4 according to a first printing instruction generated by the preset printing pattern so as to change the irradiation direction of the local laser beam 5, and as the cross section of the laser beam 4 is in the shape of the word line, the whole line printing can be performed at the moment, specifically: when any line is printed, the acousto-optic regulator 1 does not modulate and interfere the laser line beam 4 at the position corresponding to the printing point in the line, so that the laser line beam can be emitted to the printing stock 3 to burn the printing stock 3, and the acousto-optic regulator 1 can modulate and interfere the laser line beam 4 at the position corresponding to the printing point in the line, so that the laser line beam cannot be irradiated to the printing stock 3, namely the laser line beam does not burn the printing stock 3 until the preset printing pattern is printed on the printing stock 3, namely, the laser marking machine can print the whole line on the printing stock 3 without printing the point by point of each line.
Wherein, can set up the support in order to realize the fixed to acousto-optic regulator 1, stock 3, laser head 2 and metal sheet, and laser head 2 can the direct mount on current laser marking machine to replace its original laser head 2.
In the present invention, the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (7)
1. The device for controlling the lasers in parallel is characterized by comprising an acousto-optic regulator (1) and a laser head (2);
the laser head (2) is used for emitting a laser beam (4) with a cross section in a linear shape to a printing stock (3) when the laser head and the printing stock (3) move horizontally relatively, and the extension direction of the linear shape of the laser beam is vertical to the direction of the horizontal movement of the laser head (2) and the printing stock (3) relatively;
the acousto-optic regulator (1) is used for periodically modulating and intervening local laser beams (5) of the laser beams (4) according to a first printing instruction generated by the preset printing pattern so as to change the irradiation directions of the local laser beams (5), and preventing the local laser beams (5) after modulation from irradiating on the printing stock (3) until the preset printing pattern is printed on the printing stock (3).
2. The device for the parallel control of the lasers according to claim 1, characterized in that the process of modulation intervention by the acousto-optic modulator (1) comprises:
periodically generating modulated light (7) according to said first printing instructions;
according to the modulated light (7) generated each time, the local laser beams (5) of the laser beams (4) emitted by the laser head (2) are modulated and intervened in sequence to change the irradiation direction of the local laser beams (5).
3. A device for the parallel control of lasers according to claim 2, characterized in that between said substrate (3) and said laser head (2) there is further provided a line mirror (8) for the passage of the laser beam (4) emitted by the laser head (2).
4. A device for parallel control of lasers according to any of claims 1 to 3, characterized by a metal plate for receiving said local laser beam (5) illumination after modulated intervention.
5. A method for parallel control of laser, which is applied to the apparatus for parallel control of laser according to any one of claims 1 to 4, and comprises:
s1, when the laser head (2) moves horizontally relative to the printing stock (3), the laser beam (4) with the cross section being a laser spot in a linear shape is emitted to the printing stock (3), and the extension direction of the linear shape of the laser spot is perpendicular to the direction of the horizontal movement of the laser head (2) relative to the printing stock (3);
s2, the acousto-optic regulator (1) periodically modulates and intervenes on the local laser beam (5) of the laser beam (4) according to a first printing instruction generated by a preset printing pattern so as to change the irradiation direction of the local laser beam (5), and prevents the local laser beam (5) after modulation from irradiating on the printing stock (3) until the preset printing pattern is printed on the printing stock (3).
6. The method for controlling laser beams in parallel according to claim 5, wherein the acousto-optic modulator (1) periodically performs modulation intervention on the local laser beam (5) of the laser beam (4) according to the first printing instruction generated by the preset printing pattern to change the irradiation direction of the local laser beam (5) and comprises:
s20, periodically generating modulated light (7) according to a first printing instruction generated by the preset printing pattern;
and S21, according to the modulated light (7) generated each time, sequentially modulating and intervening the local laser beams (5) of the laser beam bundle (4) emitted by the laser head (2) to change the irradiation direction of the local laser beams (5).
7. A laser marking machine comprising a device for parallel control of lasers as claimed in any one of claims 1 to 4.
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