Laser power meter probe

Abstract

The utility model relates to the technical field of sensors, and provides a laser power meter probe, which comprises an inner circle body, an outer circle body and radiating fins, the plurality of radiating fins are arranged between the inner circle body and the outer circle body and are used for connecting the inner circle body and the outer circle body; the upper end face of the inner circle body is provided with an absorption layer used for receiving laser beams. A thermopile layer is arranged on the lower end surface of the outer circle body; when laser enters the probe, the absorption layer of the inner circle receives laser beams and converts light energy into heat energy, and the heat energy is transmitted to the thermopile layer through the cooling fins and converted into electric signals which are output to a detection circuit of the laser power meter. According to the probe, the inner circle body and the outer circle body are connected through the heat dissipation fins, so that the heat dissipation area of the probe is increased; through structural optimization, the use performance of the probe is greatly improved, and the production cost can be saved.

Description

Technical Field

[0001] The utility model relates to the technical field of sensors, in particular to a laser power meter probe. Background Art

[0002] Laser power meters are essential equipment for laser operation, used to measure laser power output. Pyroelectric laser power meters are the most widely used in the laser industry, offering a wide spectral and power measurement range. The sensor of a thermoelectric laser power meter converts light energy into heat, which is then converted into an electrical signal to output the laser power.

[0003] In existing thermoelectric laser power meter probe designs, besides considering matching with the laser, the most important challenge lies in the probe's heat dissipation. The probe's heat dissipation capacity is closely related to factors such as the probe's material and structure. If the heat dissipation capacity is insufficient, the probe will be damaged by overheating. To meet the needs of measuring high-power lasers, but the existing probe structure lacks heat dissipation capacity, existing technologies generally require the use of air cooling, water cooling, and other structures to help reduce the temperature. This makes the overall structure of the laser power meter larger and more complex, and increases the cost.

[0004] CN112729537A discloses a sensor and laser power meter for measuring laser power, including a metal substrate, an absorber, an insulating layer, a thermopile sensitive layer and a terminal. The absorber is located on the other side of the thermopile sensitive layer. The thermopile sensitive layer includes two stacked thermopile positive and negative electrode coatings. The insulating layer is located between the two adjacent thermopile positive and negative electrode coatings. The insulating layer is also provided between the substrate and the thermopile. The terminal is located on the substrate, and a polytetrafluoroethylene seat is provided at the bottom of the terminal. The polytetrafluoroethylene seat is fixed to one side of the substrate sensitive layer. A through hole corresponding to the terminal is also provided on the insulating layer near the substrate. The laser power meter structure of the above patent is a conventional structure in the prior art. Figure 4 It can be seen that it is a traditional laser power meter structure. The metal base of its probe is a solid cylinder, and the overall structure of the laser power meter is huge, especially the heat sink and heat conduction structure, which significantly increases the volume of the laser power meter. Its specification

[0037] also mentions that power meters of different powers can be made by replacing different cooling components, such as larger heat sinks or cooling components in the form of fans, water cooling, etc.

[0005] Based on this, the technical problem solved in this case is: how to solve the problem that existing laser power meters are large in size and complex in structure. Utility Model Content

[0006] In order to solve the above technical problems, the utility model provides a laser power meter probe. The structure of this probe connects the inner circular body and the outer circular body in the form of heat dissipation fins, which not only increases the heat dissipation area of ​​the probe, but also greatly improves the performance of the probe through structural optimization and can save production costs.

[0007] The technical solution of the utility model is:

[0008] A laser power meter probe comprises an inner body, an outer body and heat dissipation fins; a plurality of heat dissipation fins are arranged between the inner body and the outer body and used to connect the two; an absorption layer for receiving a laser beam is provided on the upper end surface of the inner body; and a thermopile layer is provided on the lower end surface of the outer body;

[0009] When the laser enters the probe, the absorption layer of the inner body receives the laser beam and converts the light energy into heat energy. The heat energy is transferred to the thermopile layer through the heat dissipation fins, converted into an electrical signal and output to the detection circuit of the laser power meter.

[0010] Compared with the traditional probe structure, the present application increases the heat dissipation area of ​​the probe by using the heat dissipation fins on the probe, thereby improving the heat dissipation efficiency of the probe, thereby reducing the dependence on the heat dissipation structure of the laser power meter and achieving the purpose of reducing the volume of the laser power meter.

[0011] In the above-mentioned laser power meter probe, two lead holes are provided on the side of the outer circular body, and the positive and negative leads of the thermopile layer pass through the two lead holes respectively and are connected to the detection circuit of the laser power meter.

[0012] In the above-mentioned laser power meter probe, a groove is provided on the lower end surface of the outer circular body; an insulating layer is provided in the groove to prevent the positive and negative poles of the thermopile layer from being connected; and the thermopile layer is provided on the insulating layer.

[0013] In the above-mentioned laser power meter probe, the shape of the heat dissipation fin is wavy, straight or arc-shaped.

[0014] In the above-mentioned laser power meter probe, the diameter of the inner circular body is the detection aperture of the laser power meter.

[0015] In the above-mentioned laser power meter probe, the thermopile layer is a ring-shaped thermopile formed by connecting a plurality of thermocouples in series; the thermocouples are copper-constantan thermocouples.

[0016] In the above-mentioned laser power meter probe, the absorption layer is a black chrome plating layer.

[0017] In the above-mentioned laser power meter probe, the insulating layer is an insulating layer made of ceramic material.

[0018] One of the above technical solutions of the utility model has at least one of the following advantages or beneficial effects:

[0019] The probe of the present invention connects the inner circular body and the outer circular body through the form of heat dissipation fins. Compared with the existing technology, this probe not only increases the heat dissipation area of ​​the probe and reduces the dependence on heat dissipation structures such as air cooling and water cooling, but also optimizes the overall structure of the product. Through this structural optimization, the performance of the probe is greatly improved, and the volume of the entire laser power meter can be reduced, saving production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic three-dimensional diagram of the lower end surface of the probe of Example 1 of the present utility model;

[0021] Figure 2 This is a three-dimensional schematic diagram of the upper end surface of the probe of Example 1 of the present utility model;

[0022] Figure 3 This is a bottom view of Example 1 of the present utility model;

[0023] Figure 4 It is a side view of embodiment 1 of the present utility model.

[0024] The markings in the accompanying drawings are as follows:

[0025] 1. Inner body; 2. Outer body; 3. Heat sink fins; 21. Lead holes; 22. Grooves; A. Absorption layer; B. Thermopile layer; C. Insulation layer. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] Example 1

[0028] refer to Figures 1 to 4 A laser power meter probe comprises an inner body 1, an outer body 2 and heat dissipation fins 3; a plurality of heat dissipation fins 3 are arranged between the inner body 1 and the outer body 2 and used to connect the two; an absorption layer A for receiving a laser beam is provided on the upper end surface of the inner body 1; a thermopile layer B is provided on the lower end surface of the outer body 2;

[0029] When the laser enters the probe, the absorption layer A of the inner body 1 receives the laser beam and converts the light energy into heat energy. The heat energy is transferred to the thermopile layer B through the heat dissipation fins 3 and converted into an electrical signal and output to the detection circuit of the laser power meter.

[0030] In actual application, after passing through other components of the laser power meter, the laser is directly irradiated on the inner body 1. The absorption layer A of the inner body 1 receives the laser beam and converts the light energy into heat energy. The heat energy is then transferred to the thermopile layer B of the outer body 2 along the heat dissipation fins 3. The thermopile layer B converts the heat energy into an electrical signal and outputs it to the detection circuit of the laser power meter for power conversion.

[0031] The probe of this embodiment connects the inner circular body 1 and the outer circular body 2 through the form of heat dissipation fins 3. Compared with the existing technology, this probe not only increases the heat dissipation area of ​​the probe and reduces the dependence on heat dissipation structures such as air cooling and water cooling, but also optimizes the overall structure of the product. Through this structural optimization, the performance of the probe is greatly improved, and the volume of the entire laser power meter can be reduced, saving production costs.

[0032] In actual application, two lead holes 21 are provided on the side of the outer cylindrical body 2 , and the positive and negative leads of the thermopile layer B pass through the two lead holes 21 respectively to be connected to the detection circuit of the laser power meter.

[0033] In this embodiment, the lower end surface of the outer body 2 is provided with a groove 22; within this groove 22 is an insulating layer C, which prevents the positive and negative terminals of the thermopile layer B from intermittently connecting; the thermopile layer B is disposed on the insulating layer C. This design allows the groove 22 of the outer body 2 to meet the requirements for coating the thermopile layer B while also preventing interference with other components of the laser power meter, allowing for secure installation. Furthermore, the insulating layer C is made of a ceramic material, which prevents accidental intermittent connection between the positive and negative terminals of the thermopile layer B.

[0034] As a preferred feature of this embodiment, to maximize the surface area of ​​the heat sink 3 within a limited space, the heat sink 3 is shaped like a wave. This design maximizes the probe's heat dissipation area within the same volume, thereby improving heat dissipation performance and reducing reliance on cooling mechanisms such as air and water cooling.

[0035] In this embodiment, the diameter of the inner body 1 is the detection aperture of the laser power meter. Under the above design, the inner body 1 is prevented from having a diameter that is too small so that the laser energy cannot be fully absorbed, while at the same time the proportion of the heat dissipation fins 3 can be increased as much as possible.

[0036] As a preferred embodiment of this invention, the thermopile layer B is a ring-shaped thermopile composed of multiple thermocouples connected in series; the thermocouples are copper-constantan thermocouples. Of course, those skilled in the art can change the thermocouple type according to actual circumstances without inventive effort, and this is also within the scope of protection of this embodiment.

[0037] As a further preferred embodiment of the present invention, the absorption layer A is a black chrome plating layer because the black chrome plating layer has the best selective absorption among all black electroplating layers and coatings.

[0038] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A laser power meter probe, characterized in that: It includes an inner circular body, an outer circular body and heat dissipation fins; a plurality of heat dissipation fins are arranged between the inner circular body and the outer circular body and used to connect the two; the upper end surface of the inner circular body is provided with an absorption layer for receiving a laser beam; the lower end surface of the outer circular body is provided with a thermopile layer; When the laser enters the probe, the absorption layer of the inner body receives the laser beam and converts the light energy into heat energy. The heat energy is transferred to the thermopile layer through the heat dissipation fins, converted into an electrical signal and output to the detection circuit of the laser power meter.

2. The laser power meter probe according to claim 1, characterized in that: Two lead holes are provided on the side surface of the outer circular body, and the positive and negative electrode leads of the thermopile layer pass through the two lead holes respectively and are connected to the detection circuit of the laser power meter.

3. The laser power meter probe according to claim 1, characterized in that: A groove is provided on the lower end surface of the outer circular body; an insulating layer is provided in the groove for preventing the positive and negative electrodes of the thermopile layer from being connected; and the thermopile layer is arranged on the insulating layer.

4. The laser power meter probe according to claim 1, characterized in that: The shape of the heat dissipation fins is wavy, straight or arc-shaped.

5. The laser power meter probe according to claim 1, characterized in that: The diameter of the inner circular body is the detection aperture of the laser power meter.

6. The laser power meter probe according to claim 1, characterized in that: The thermopile layer is a ring-shaped thermopile formed by connecting multiple thermocouples in series; the thermocouples are copper-constantan thermocouples.

7. The laser power meter probe according to claim 1, characterized in that: The absorption layer is a black chrome plating layer.

8. The laser power meter probe according to claim 3, characterized in that: The insulating layer is made of ceramic material.

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