CN114669886A

CN114669886A - Laser device

Info

Publication number: CN114669886A
Application number: CN202210423077.4A
Authority: CN
Inventors: 李文戈
Original assignee: Yangzhou Luotianyi Intelligent Equipment Co ltd
Current assignee: Yangzhou Luotianyi Intelligent Equipment Co ltd
Priority date: 2022-04-21
Filing date: 2022-04-21
Publication date: 2022-06-28

Abstract

The invention provides a laser device, which comprises a laser, a laser control unit and a laser control unit, wherein the laser is used for emitting laser; the beam expander is arranged behind the laser; the fine adjustment mechanism is connected to the bottom of the beam expanding lens; the diaphragm is arranged behind the beam expanding lens; a calibration mechanism, the calibration mechanism comprising: a beam splitter facing the laser to split the laser into a first light and a second light; a power meter disposed at a first side of the beam splitter to receive the first light and measure an energy of the first light; and the controller is connected with the power meter and the laser and controls the output power of the laser so that the power of the power meter reaches a preset power value. According to the laser device provided by the invention, the laser can be timely and conveniently calibrated.

Description

Laser device

Technical Field

The invention relates to the field of laser, in particular to a laser device.

Background

After present laser device used for a period, the power can appear attenuating, and the facula also can have the problem moreover to cause laser unstability, be applied to laser and wash and be exactly that wash unclean.

Moreover, the existing laser device is inconvenient to adjust and needs a long time for calibration.

Disclosure of Invention

In view of this, the present invention provides a method for calibrating laser in time and conveniently, so as to ensure the stability of laser output.

To solve the above technical problem, the present invention provides a laser device, including:

a laser for emitting laser light;

the beam expander is arranged behind the laser to receive laser from the laser, and the multiple of the beam expander is switchable;

the fine adjustment mechanism is connected to the bottom of the beam expander so as to move the beam expander in the transverse and longitudinal directions and the front and back directions;

the diaphragm is arranged behind the beam expanding lens to receive the laser from the beam expanding lens, and the aperture of the diaphragm is adjustable;

a calibration mechanism, the calibration mechanism comprising:

a beam splitter facing the laser to receive laser light from the laser and split the laser light into a first light and a second light;

a power meter disposed at a first side of the beam splitter to receive the first light and measure an energy of the first light;

and the controller is connected with the power meter and the laser and controls the output power of the laser so that the power of the power meter reaches a preset power value.

Further, the laser device further includes:

the ceramic chip is arranged opposite to the laser to receive the second light and display light spots of the second light;

the camera is arranged on the second side of the spectroscope to collect a light spot image on the ceramic chip;

and the processor is connected with the camera to receive the light spot image, compare the light spot image with a preset image, calculate a first similarity, and prompt when the first similarity is smaller than a first preset threshold value.

Further, when the processor compares the outline of the light spot image with the outline of the preset image according to the condition that the first similarity is larger than a preset threshold value, the processor calculates a second similarity,

the controller is further connected with the fine adjustment mechanism and the processor, and the fine adjustment mechanism is controlled to move in the transverse and longitudinal directions, so that the second similarity between the outline of the facula image calculated by the processor and the outline of the preset image is larger than a second preset threshold value.

Further, the processor also calculates the spot diameter of the spot image;

the controller is further connected with the processor and the fine adjustment mechanism, and the spot diameter calculated by the processor is smaller than the preset diameter by controlling the fine adjustment mechanism to move in the front-back direction.

Further, the controller is also connected with the beam expander, when the controller controls the fine adjustment mechanism to move back and forth, the diameter of the light spot cannot be smaller than the preset diameter, and the beam expander of the controller is gradually increased by preset times, so that the diameter of the light spot calculated by the processor is smaller than the preset diameter.

Further, the controller is also connected with the diaphragm, when the controller controls the beam expanding lens to be increased to a preset limit multiple, the diameter of the light spot cannot be smaller than a preset diameter, and the controller controls the diaphragm to be reduced in aperture, so that the diameter of the light spot calculated by the processor is smaller than the preset diameter.

Further, the laser device further includes:

the front section of the transparent box body is provided with a light inlet, the laser of the laser is received through the light inlet, and the calibration mechanism is arranged in the transparent box body.

Further, the transparent box body is made of brown glass.

The technical scheme of the invention at least has one of the following beneficial effects:

the laser device according to the present invention.

Drawings

Fig. 1 is a schematic structural diagram of a laser device according to an embodiment of the invention.

Reference numerals:

100. a laser; 210. a beam expander; 220. a fine adjustment mechanism; 300. a diaphragm; 410. a beam splitter; 420. a power meter; 430. a ceramic plate; 440. a camera; 500. a transparent box body.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention, are within the scope of the invention.

Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships are changed accordingly.

A laser apparatus according to an embodiment of the present invention will be described below with reference to fig. 1.

As shown in fig. 1, a laser apparatus according to an embodiment of the present invention includes: laser 100, beam expander 210, fine adjustment mechanism 220, diaphragm 300 and calibration mechanism.

First, the laser 100 and the beam expander 210 are explained. The laser 100 is used to emit laser light. The beam expander 210 is disposed behind the laser 100 to receive the laser light from the laser 100, and the multiples of the beam expander 210 are switchable. The beam expander 210 can change the optical quality and change the diameter of the light spot, and the beam expander 210 with switchable multiple can change the optical quality and the diameter of the light spot well according to the requirement.

Next, the fine adjustment mechanism 220 will be described. The fine adjustment mechanism 220 is connected to the bottom of the beam expander 210 to move the beam expander 210 in the longitudinal and lateral directions and in the front-back direction. The focal length of the laser can be changed by the back and forth movement of the fine adjustment mechanism 220, and the laser 100 can be aligned with the center of the beam expander 210 by the horizontal and longitudinal movement of the fine adjustment mechanism 220, so that the light spot is as close to a circle as possible, and the optical quality is improved.

Next, the diaphragm 300 is explained. The aperture 300 is disposed behind the beam expander 210 to receive the laser light from the beam expander 210, and the aperture of the aperture 300 is adjustable. The aperture-adjustable diaphragm 300 can adjust the aperture according to the quality of the light spot, so that the area with poor optical quality in the light spot can be shielded, and the optical quality is ensured.

Finally, the calibration mechanism is explained. The calibration mechanism includes a beam splitter 410, a power meter 420, and a controller. The beam splitter 410 faces the laser 100 to receive the laser light from the laser 100 and split the laser light into a first light and a second light. The power meter 420 is disposed at a first side of the beam splitter 410 to receive the first light and measure the energy of the first light. The controller is connected with the power meter 420 and the laser 100, and controls the output power of the laser 100 so that the power of the power meter 420 reaches a preset power value.

The laser light can be split into a first light and a second light by the beam splitter 410, so that the laser 100 can be calibrated according to the first light and the second light synchronously. The actual power emitted by laser 100 can be accurately known by power meter 420. The output power of the laser 100 can be accurately controlled by the controller to a predetermined power value. For example, the power meter 420 measures 20W actual power, but the actual demand is 40W, the initial laser 100 output power is 30%, and the controller can control the laser 100 output power to be 60% so that the laser output power reaches the actual demand, i.e., the laser 100 is attenuated by 50% during the use process, and can be calibrated in time.

According to the laser device, the beam expander 210 can adjust optical quality and spot diameter, the fine adjustment structure can adjust the center alignment and laser focal length of spots, and the diaphragm 300 with adjustable aperture can adjust optical quality, the calibration mechanism divides laser into a first light and a second light through the spectroscope 410, the power meter 420 measures the energy of the first light, and the controller calibrates the output power of the laser 100 in time. Therefore, laser can be calibrated timely and conveniently, and the stability of laser output is ensured.

According to some embodiments of the present invention, the laser device further comprises a ceramic plate 430, a camera 440, and a processor. The ceramic plate 430 is disposed opposite to the laser 100 to receive the second light to display a spot of the second light. The camera 440 is disposed at a second side of the beam splitter 410 to collect a spot image on the ceramic sheet 430. The processor is connected with the camera 440 to receive the light spot image, compare the light spot image with the preset image, calculate a first similarity, and prompt when the first similarity is smaller than a first preset threshold.

After the ceramic chip 430 receives the second laser, the shape of the light spot can be displayed more clearly for subsequent judgment. The camera 440 collects the spot image, compares the spot image with a predetermined pattern (spot image under normal laser condition), calculates the similarity, and can determine whether the laser is normal, needs to be adjusted, or cannot be adjusted according to the similarity. When the first similarity is smaller than a first preset threshold (the lowest similarity requirement is the most basic correctable requirement), prompt is performed, for example, the laser does not emit light or the shape of a light spot is seriously deformed, and prompt is performed in time to remind relevant personnel to perform maintenance. The prompting method can be display or alarm. Therefore, the problem of laser can be found in time, and invalid calibration can be avoided for multiple times.

Further, when the processor compares the outline of the light spot image with the outline of the predetermined image according to the fact that the first similarity is larger than the predetermined threshold value, the processor calculates a second similarity, and the controller is further connected with the fine adjustment mechanism 220 and the processor, and the second similarity between the outline of the light spot image calculated by the processor and the outline of the predetermined image is larger than the second predetermined threshold value by controlling the fine adjustment mechanism 220 to move in the horizontal and vertical directions.

The outline of the light spot can better reflect whether the center of the laser 100 coincides with the center of the beam expanding lens 210, so that the situation that the beam expanding lens 210 shields the light spot and the image of the light spot is out of round is avoided. When the similarity between the contour of the light spot acquired by the camera 440 and the contour of the predetermined image is too low, the beam expander 210 can be adjusted by the controller, so as to determine whether the center of the laser 100 coincides with the center of the beam expander 210, so that the second similarity between the contour of the light spot image and the contour of the predetermined image is greater than a second predetermined threshold, and the optical quality of the laser is further increased.

Further, the processor also calculates the spot diameter of the spot image; the controller is also connected with the processor and the fine adjustment mechanism 220, and the fine adjustment mechanism 220 is controlled to move back and forth, so that the diameter of the light spot calculated by the processor is smaller than the preset diameter.

When the laser is used for a period of time, the laser is easy to defocus, the diameter of a light spot is enlarged, and the diameter of the light spot of the laser at the focal length is the smallest. The calibration of the light spot profile in the previous period also enables the diameter of the light spot to be calculated more accurately. The focal length of the laser can be adjusted conveniently and quickly by moving the beam expander 210, so that defocusing of the laser is avoided, and the etching or cleaning effect of the laser is ensured.

Further, the controller is further connected with the beam expander 210, when the controller controls the fine adjustment mechanism 220 to move back and forth, and the diameter of the light spot cannot be smaller than the preset diameter, the beam expander 210 of the controller is gradually increased by a preset multiple, so that the diameter of the light spot calculated by the processor is smaller than the preset diameter.

That is to say, in time the focus is totally gathered, and the facula diameter still can not be less than predetermined diameter, explains that the optical quality of laser goes wrong, through increasing beam expander 210 multiple, can reduce the facula diameter. Considering that the beam expander 210 is increased by too large a factor and the energy damage is serious, increasing the output power of the laser 100 may still not enable the laser to reach the predetermined power. A predetermined limit multiple is set. For example, the initial beam expander 210 is 2 times, and the predetermined limit multiple is set to 4 times.

Further, the controller is also connected with the diaphragm 300, and when the controller controls the beam expanding lens 210 to be increased to a preset limit multiple and cannot enable the diameter of the light spot to be smaller than the preset diameter, the controller controls the diaphragm 300 to be reduced in aperture so that the diameter of the light spot calculated by the processor is smaller than the preset diameter.

The optical quality of the laser can be increased by blocking the abnormal spot area with the diaphragm 300, so that the spot diameter is smaller than the predetermined diameter.

According to some embodiments of the invention, the laser apparatus further comprises a transparent housing 500. The front section of the transparent box 500 is formed with a light inlet through which the laser beam of the laser 100 is received, and the calibration mechanism is disposed in the transparent box 500.

The foregoing is a preferred embodiment of the present invention, and it should be noted that the calibration mechanism can be independent through the transparent housing 500 and can be used to calibrate different lasers 100. The box body is transparent, so that the calibration process can be observed conveniently.

Further, the transparent box 500 is made of brown glass. The glass has higher transparency, and the brown glass can reduce the damage of laser to human eyes in the process of observing laser by the human eyes.

It will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.

Claims

1. A laser device, comprising:

a laser for emitting laser light;

a calibration mechanism, the calibration mechanism comprising:

2. The laser device of claim 1, further comprising:

3. The laser device according to claim 2, wherein the processor compares the profile of the spot image with the profile of the predetermined image and calculates a second similarity when the processor determines that the first similarity is greater than a predetermined threshold,

4. The laser device of claim 3, wherein the processor further calculates a spot diameter of the spot image;

5. Laser device according to claim 4,

the controller is further connected with the beam expander, when the controller controls the fine adjustment mechanism to move back and forth, the diameter of the light spot cannot be smaller than the preset diameter, and the beam expander is gradually increased by preset times so that the diameter of the light spot calculated by the processor is smaller than the preset diameter.

6. The laser device of claim 5, wherein the controller is further connected to the diaphragm, and when the controller controls the beam expander to increase to a predetermined limit multiple such that the spot diameter cannot be smaller than a predetermined diameter, the controller controls the diaphragm to reduce the aperture such that the spot diameter calculated by the processor is smaller than the predetermined diameter.

7. The laser device according to any one of claims 1 to 6, further comprising:

8. The laser device of claim 7, wherein the transparent box is made of brown glass.