CN103212823A - Focus seeking method for photoelectric focus seeking device - Google Patents
Focus seeking method for photoelectric focus seeking device Download PDFInfo
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- CN103212823A CN103212823A CN2012100165819A CN201210016581A CN103212823A CN 103212823 A CN103212823 A CN 103212823A CN 2012100165819 A CN2012100165819 A CN 2012100165819A CN 201210016581 A CN201210016581 A CN 201210016581A CN 103212823 A CN103212823 A CN 103212823A
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Abstract
The invention relates to a focus seeking method for a photoelectric focus seeking device, and mainly solves the problem that a focal position is difficult to find during laser cutting operation in the prior art. The invention adopts the technical scheme that the photoelectric focus seeking device consists of a photoelectric sensor, an automatic lifting seat and a computer control system. When the focal position is arranged in an ideal position below a cutting nozzle in need of adjusting the upward and downward movement of a focusing mirror, the photoelectric focus seeking device is placed below the cutting nozzle, guiding light is emitted by laser light, the photoelectric focus seeking device is started, the automatic lifting platform of the photoelectric focus seeking device upwards moves, the guiding light falls onto the photoelectric sensor, the sensor senses the light and is used for sending out a signal, a computer is used for starting algorithm and control, and when the lifting platform rises to a certain height and a light spot changes to the smallest point, the control system is used for automatically stopping the working of the lifting seat. According to the invention, the problem is better solved, and the focus seeking method can be applied to the detection of the working focal position of the focusing mirror.
Description
Technical field
The present invention relates to a kind of detection means that is used for focus lamp job spotlight position, especially for determining of laser cutting device focus lamp job spotlight position.
Background technology
Laser cutting device is by focus lamp approximately parallel laser beam to be pooled a minimum high-energy point to carry out high-accuracy cutting production, general focal position cut quality the best during the 200um left and right sides below the cutting head light-emitting window, as shown in Figure 1, but owing in same lens barrel, needing to place the focus lamp of different focal because of the cutting demand, perhaps each lens barrel manufacturing tolerance is not quite similar, therefore the position of focus generally can be at ideal position, as shown in Figure 2, so just need move up and down and regulate the focal position focus lamp, be below cutting head, to draw near by perusal with steel disc in the past, the breakdown critical localisation of steel disc judges how many focus lamps moves up and down, complex operation, certain danger is arranged, and miss by a mile.
Chinese patent CN101169602 discloses a kind of focusing leveling measuring method and device, relates to the new method of the focusing and leveling sensor-based system that is applied to wafer in the projection lithography system, belongs to the optical measurement field.The present invention includes three parts: light source collimating module, focusing subsystem and leveling subsystem.Laser instrument of the present invention sends laser through the single-mode fiber collimation, after passing through the drift compensation device again, seeing through polarizing beam splitter and λ/4 wave plates incides on the tested silicon chip, make light repeatedly pass through tested silicon chip through plane mirror and right-angle reflecting prism, utilize set of lenses before position sensor, to amplify again, obtain silicon chip surface out of focus information.Utilize the plane optical splitter that light is returned along the road, see through lens and incide on the Position-Sensitive Detector, thereby obtain the two-dimentional inclination information of silicon chip surface.
Chinese patent CN1811519 discloses a kind of laser guiding focusing device for telescope, and it mainly connects pawl, right connection pawl, cross bar, montant and semiconductor laser etc. by a left side and forms.Described semiconductor laser is placed on the telescope ocular front end, the laser beam that the adjusting semiconductor laser sends passes telescope directive level crossing back reflection at a distance to scale, regulate hot spot again and become a fleck on scale, this has just realized telescope laser guide and focusing function.
The present invention is that the photoelectricity of a kind of focus lamp job spotlight position is sought burnt device, and this part is placed under the cutting head, and opening program will be sought the focal position automatically.
Summary of the invention
Technical problem to be solved by this invention is the problem that the laser cutting device focus lamp job spotlight that exists in the prior art is difficult to seek, the invention provides a kind of new photoelectricity and seek the focus searching method of burnt device, the used photoelectricity of this focus searching method is sought burnt utensil the advantage of seeking Jiao easily.
For solving the problems of the technologies described above, the technical solution used in the present invention is as follows: a kind of photoelectricity is sought the focus searching method of burnt device, comprises following several steps:
A) when needs adjusting focus lamp moves up and down, photoelectricity is sought the below that burnt device is placed on the laser cutting machine cutting head;
B) laser is left guiding light, starts photoelectricity and seeks burnt device, and the self-raising platform that photoelectricity is sought burnt device moves up, guide lights drops on the photoelectric sensor, sensor photosensitive sends signal, the signal input computer control system of photoelectric sensor, and computer begins s operation control;
C) be raised to certain altitude when lifting platform, hot spot becomes minimum when some again, and control system stops elevating bracket work automatically;
D) measure the cutting head light-emitting window and seek burnt device upper surface distance, cut cutting constant L again, be the position of focus lamp focus apart from photoelectricity.
Described photoelectricity is sought burnt device, comprise photoelectric sensor, motor, elevating bracket, elevating lever, computer control system, described elevating bracket has groove in two ends up and down, motor be positioned at elevating bracket lower end inside grooves, elevating lever below, the motor upper end links to each other with the elevating lever bottom, and elevating lever is arranged in the upper grooves of elevating bracket, and elevating lever can move up and down with respect to elevating bracket, photoelectric sensor is positioned at the center of top groove of elevating lever, the signal input computer control system of photoelectric sensor.
In the technique scheme, when laser is penetrated on photoelectric sensor, photoelectric sensor produces signal, and signal is imported described computer control system.
In the technique scheme, described cutting constant L is relevant with the performance of laser cutting machine, and the numerical value of L is generally 200um.
It is an independently detection means that photoelectricity of the present invention is sought burnt device, is made up of photoelectric sensor, automatic lifting seat, computer control system.Regulating focus lamp at needs moves up and down when the focal position being occupy below the cutting head ideal position, photoelectricity is sought the below that burnt device is placed on cutting head, laser is left guiding light, start photoelectricity and seek burnt device, the self-raising platform that photoelectricity is sought burnt device moves up, and guide lights drops on the photoelectric sensor, sensor photosensitive sends signal, computer begins s operation control, becomes minimumly when some again when lifting platform is raised to the certain altitude hot spot, and control system stops elevating bracket work automatically.Measure the cutting head light-emitting window and seek burnt device upper surface distance apart from photoelectricity and cutting about the ideal position that 200um is the focus lamp focus, according to cutting effect vernier focusing mirror position to satisfy the cutting demand.
The present invention is that the photoelectricity of a kind of focus lamp job spotlight position is sought burnt device, has solved the problem that laser cutting device focus lamp job spotlight is difficult to seek, and has improved debugging efficiency, and is simple to operate, safe and reliable, obtained better technical effect.
Description of drawings
Fig. 1 is a laser cutting ideal operation view.
Fig. 2 is that focus is not at desirable position view.
Fig. 3 seeks burnt device schematic diagram for photoelectricity.
Fig. 4 seeks burnt device for photoelectricity and seeks burnt process schematic diagram.
Fig. 5 seeks burnt device for photoelectricity and seeks burnt process schematic diagram.
Among Fig. 1,1 is focus lamp; 2 for converging light; 3 is the cutting head light-emitting window; 4 is that band is cut steel plate.
Among Fig. 2,1 is focus lamp; 2 for converging light; 3 is the cutting head light-emitting window; 4 is that band is cut steel plate; 5 move down for focus.
Among Fig. 3,1 is elevating lever; 2 is photoelectric sensor; 3 is motor; 4 is elevating bracket.
Among Fig. 4,1 is focus lamp; 2 for converging light; 3 seek burnt device for photoelectricity captures hot spot; 4 is elevating bracket.
Among Fig. 5,1 is focus lamp; 2 for converging light; 3 for being elevated to the focal position; 4 is elevating bracket.
The invention will be further elaborated below by specific embodiment, but be not limited only to present embodiment.
Specific embodiment
[embodiment 1]
A kind of photoelectricity is sought the focus searching method of burnt device, comprises following several steps:
A) when needs adjusting focus lamp moves up and down, photoelectricity is sought the below that burnt device is placed on the laser cutting machine cutting head;
B) laser is left guiding light, starts photoelectricity and seeks burnt device, and the self-raising platform that photoelectricity is sought burnt device moves up, guide lights drops on the photoelectric sensor, sensor photosensitive sends signal, the signal input computer control system of photoelectric sensor, and computer begins s operation control;
C) be raised to certain altitude when lifting platform, hot spot becomes minimum when some again, and control system stops elevating bracket work automatically;
D) measure the cutting head light-emitting window and seek burnt device upper surface distance, cut cutting constant L again, be the position of focus lamp focus apart from photoelectricity.
Described photoelectricity is sought burnt device, as shown in Figure 3, comprise photoelectric sensor 2, motor 3, elevating bracket 4, elevating lever 1, computer control system, described elevating bracket has groove in two ends about in the of 4, motor 3 be positioned at elevating bracket 4 lower end inside grooves, elevating lever 1 below, motor 3 upper ends link to each other with elevating lever 1 bottom, elevating lever 1 is arranged in the upper grooves of elevating bracket 4, elevating lever 1 can move up and down with respect to elevating bracket 4, photoelectric sensor 2 is positioned at the center of top groove of elevating lever 1, the signal input computer control system of photoelectric sensor 2.
[embodiment 2]
A kind of photoelectricity is sought the focus searching method of burnt device, comprises following several steps:
A) when needs adjusting focus lamp moves up and down, photoelectricity is sought the below that burnt device is placed on the laser cutting machine cutting head;
B) laser is left guiding light, starts photoelectricity and seeks burnt device, and the self-raising platform that photoelectricity is sought burnt device moves up, guide lights drops on the photoelectric sensor, sensor photosensitive sends signal, the signal input computer control system of photoelectric sensor, and computer begins s operation control;
C) be raised to certain altitude when lifting platform, hot spot becomes minimum when some again, and control system stops elevating bracket work automatically;
D) measure the cutting head light-emitting window and seek burnt device upper surface distance, cut cutting constant L again, be the position of focus lamp focus apart from photoelectricity.
Described photoelectricity is sought burnt device, comprise photoelectric sensor, motor, elevating bracket, elevating lever, computer control system, described elevating bracket has groove in two ends up and down, motor be positioned at elevating bracket lower end inside grooves, elevating lever below, the motor upper end links to each other with the elevating lever bottom, and elevating lever is arranged in the upper grooves of elevating bracket, and elevating lever can move up and down with respect to elevating bracket, photoelectric sensor is positioned at the center of top groove of elevating lever, the signal input computer control system of photoelectric sensor.When laser is penetrated on photoelectric sensor, photoelectric sensor produces signal, and signal is imported described computer control system.
[embodiment 3]
A kind of photoelectricity is sought the focus searching method of burnt device, comprises following several steps:
A) when needs adjusting focus lamp moves up and down, photoelectricity is sought the below that burnt device is placed on the laser cutting machine cutting head;
B) laser is left guiding light, starts photoelectricity and seeks burnt device, and the self-raising platform that photoelectricity is sought burnt device moves up, guide lights drops on the photoelectric sensor, sensor photosensitive sends signal, the signal input computer control system of photoelectric sensor, and computer begins s operation control;
C) be raised to certain altitude when lifting platform, hot spot becomes minimum when some again, and control system stops elevating bracket work automatically;
D) measure the cutting head light-emitting window and seek burnt device upper surface distance, cut cutting constant L again, be the position of focus lamp focus apart from photoelectricity.Wherein, L is 200um.Photoelectricity is sought burnt process as shown in Figure 4 and Figure 5.
[embodiment 4]
A kind of photoelectricity is sought the focus searching method of burnt device, comprises following several steps:
A) when needs adjusting focus lamp moves up and down, photoelectricity is sought the below that burnt device is placed on the laser cutting machine cutting head;
B) laser is left guiding light, starts photoelectricity and seeks burnt device, and the self-raising platform that photoelectricity is sought burnt device moves up, guide lights drops on the photoelectric sensor, sensor photosensitive sends signal, the signal input computer control system of photoelectric sensor, and computer begins s operation control;
C) be raised to certain altitude when lifting platform, hot spot becomes minimum when some again, and control system stops elevating bracket work automatically;
D) measure the cutting head light-emitting window and seek burnt device upper surface distance, cut cutting constant L again, be the position of focus lamp focus apart from photoelectricity.Wherein, L is 250um.
[embodiment 5]
It is an independently detection means that photoelectricity is sought burnt device, is made up of photoelectric sensor, automatic lifting seat, computer control system.Regulating focus lamp at needs moves up and down when the focal position being occupy below the cutting head ideal position, photoelectricity is sought the below that burnt device is placed on cutting head, laser is left guiding light, start photoelectricity and seek burnt device, the self-raising platform that photoelectricity is sought burnt device moves up, guide lights drops on the photoelectric sensor, sensor photosensitive sends signal, computer begins s operation control, become minimum when some again when lifting platform is raised to the certain altitude hot spot, control system stops elevating bracket work automatically, measure the cutting head light-emitting window and seek burnt device upper surface distance apart from photoelectricity and cutting about the ideal position that 200um is the focus lamp focus, according to cutting effect vernier focusing mirror position to satisfy the cutting demand.
[embodiment 6]
A kind of photoelectricity is sought burnt device, comprise photoelectric sensor, motor, elevating bracket, elevating lever, computer control system, described elevating bracket has groove in two ends up and down, motor be positioned at elevating bracket lower end inside grooves, elevating lever below, the motor upper end links to each other with the elevating lever bottom, and elevating lever is arranged in the upper grooves of elevating bracket, and elevating lever can move up and down with respect to elevating bracket, photoelectric sensor is positioned at the center of top groove of elevating lever, the signal input computer control system of photoelectric sensor.When laser is penetrated on photoelectric sensor, photoelectric sensor produces signal, and signal is imported described computer control system.
Above-mentioned photoelectricity is sought the focus searching method of burnt device, comprises following several steps:
A) when needs adjusting focus lamp moves up and down, photoelectricity is sought the below that burnt device is placed on the laser cutting machine cutting head;
B) laser is left guiding light, starts photoelectricity and seeks burnt device, and the self-raising platform that photoelectricity is sought burnt device moves up, guide lights drops on the photoelectric sensor, sensor photosensitive sends signal, the signal input computer control system of photoelectric sensor, and computer begins s operation control;
C) be raised to certain altitude when lifting platform, hot spot becomes minimum when some again, and control system stops elevating bracket work automatically;
D) measure the cutting head light-emitting window and seek burnt device upper surface distance, cut cutting constant L again, be the position of focus lamp focus apart from photoelectricity.Wherein, L is 200um.
Claims (3)
1. a photoelectricity is sought the focus searching method of burnt device, comprises following several steps:
A) when needs adjusting focus lamp moves up and down, photoelectricity is sought the below that burnt device is placed on the laser cutting machine cutting head;
B) laser is left guiding light, starts photoelectricity and seeks burnt device, and the self-raising platform that photoelectricity is sought burnt device moves up, guide lights drops on the photoelectric sensor, sensor photosensitive sends signal, the signal input computer control system of photoelectric sensor, and computer begins s operation control;
C) be raised to certain altitude when lifting platform, hot spot becomes minimum when some again, and control system stops elevating bracket work automatically;
D) measure the cutting head light-emitting window and seek burnt device upper surface distance, cut cutting constant L again, be the position of focus lamp focus apart from photoelectricity.
2. seek the focus searching method of burnt device according to the described photoelectricity of claim, it is characterized in that described photoelectricity seeks burnt device, comprise photoelectric sensor, motor, elevating bracket, elevating lever, computer control system, described elevating bracket has groove in two ends up and down, motor is positioned at elevating bracket lower end inside grooves, below the elevating lever, the motor upper end links to each other with the elevating lever bottom, elevating lever is arranged in the upper grooves of elevating bracket, elevating lever can move up and down with respect to elevating bracket, photoelectric sensor is positioned at the center of top groove of elevating lever, the signal input computer control system of photoelectric sensor.
3. photoelectricity according to claim 1 is sought the focus searching method of burnt device, it is characterized in that described cutting constant L is relevant with the performance of laser cutting machine, and the numerical value of L is 200um.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210016581.9A CN103212823B (en) | 2012-01-19 | 2012-01-19 | The focus searching method of Photoelectric Jiao's device |
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| CN201210016581.9A CN103212823B (en) | 2012-01-19 | 2012-01-19 | The focus searching method of Photoelectric Jiao's device |
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Cited By (3)
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| CN107414286A (en) * | 2017-04-26 | 2017-12-01 | 深圳市创鑫激光股份有限公司 | A kind of laser marking machine focus adjustment method, device and laser marking machine |
| CN110238547A (en) * | 2019-05-09 | 2019-09-17 | 西安理工大学 | It is a kind of for measuring the system and measurement method of high power laser focal position |
| CN111207911A (en) * | 2020-01-19 | 2020-05-29 | 中国科学院上海光学精密机械研究所 | Method for measuring refractive index of parallel plane transparent solid material |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107414286A (en) * | 2017-04-26 | 2017-12-01 | 深圳市创鑫激光股份有限公司 | A kind of laser marking machine focus adjustment method, device and laser marking machine |
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| CN110238547B (en) * | 2019-05-09 | 2020-12-18 | 西安理工大学 | System and method for measuring position of high-power laser focus |
| CN111207911A (en) * | 2020-01-19 | 2020-05-29 | 中国科学院上海光学精密机械研究所 | Method for measuring refractive index of parallel plane transparent solid material |
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