CN201881048U

CN201881048U - High-power lost laser absorption device

Info

Publication number: CN201881048U
Application number: CN 201020620175
Authority: CN
Inventors: 王智勇; 刘友强; 曹银花; 秦文斌
Original assignee: SHANXI FEIHONG LASER TECHNOLOGY Co Ltd
Current assignee: SHANXI FEIHONG LASER TECHNOLOGY Co Ltd
Priority date: 2010-11-19
Filing date: 2010-11-19
Publication date: 2011-06-29
Anticipated expiration: 2020-11-19

Abstract

A high-power lost laser absorption device is capable of absorbing high-power lost laser and preventing the high-power lost laser from damaging other devices, and belongs to the application field of laser technique. The high-power lost laser absorption device comprises an absorption baffle (1) and a cooling frame (2) around the edge thereof, and is characterized in that one face of the absorption baffle (1) serves as an absorption face for laser irradiation, impervious conical holes (4) are densely distributed on the absorption face in an arrayed manner, a conical angle phi of each conical hole is smaller than or equal to 30 degrees, a central distance between each two adjacent conical holes is smaller than the size of the conical bottom face of each conical hole so that presence of plane within a laser irradiation range of the absorption face is avoided, and a cooling passage (5) is arranged in the cooling frame (5). The high-power lost laser absorption device is high in lost laser absorption efficiency, is especially suitable for absorbing high-power lost laser, and further has the advantages of low cost, low processing difficulty, compact structure and the like.

Description

A kind of high power laser loss absorption means

Technical field

The utility model relates to the absorption of high power laser loss light, is a kind of with high power laser loss light absorption, prevents the device of other components and parts of high power laser loss light injury, belongs to the laser technology application.

Background technology

High power laser in the application of field of laser processing more and more widely, the power that improves laser instrument all is the emphasis of research all the time, relatively the method for raising laser power commonly used has wavelength to close bundle at present, polarization closes bundle.Because wavelength closes bundle and polarization and closes bundle and have certain efficient, the inevitably loss of generation light in closing the bundle process, the efficient of loss light is 2%～3%.Industrial processes reaches several kilowatts even last myriawatt with the power of high power laser, and the power of loss light has surpassed watt level, reaches tens watts even tens watts.The loss of laser is inevitably, for fear of the laser of loss the components and parts that people and laser instrument do not have is caused damage, must carry out in time receiving fully handling to loss light.Therefore, design a kind of device that veiling glare is fully absorbed, significant.

Find that by investigation the way that improves laser absorption rate mainly contains two kinds, a kind of is the surface texture that changes laser pick-off face, and a kind of is to apply one or more layers material at the high-absorbility of specific wavelength at the reception material surface.

At present the device of the surface texture by changing laser pick-off face mainly contains two kinds, and a kind of is receiving plane to be carried out high roughness handle, and makes the laser that shines receiving plane become the veiling glare that one way or another is propagated, and reduces the light energy that former road is returned.This method can play the effect of protecting luminescence unit to lower powered laser instrument, to having little significance of high power laser.

Another device is to receive laser by a taper seat bigger than laser spot diameter, reaches the purpose that absorber fully absorbs laser by the repeatedly reflection of laser in taper seat.This method can realize the abundant absorption of absorber to laser, but this device is applicable to the situation that spot diameter is less.For the situation of laser large spot, it is very big that the diameter of this device and thickness all can become, and conflicts mutually with little, the lightweight characteristics of laser instrument volume, is unfavorable for the application in laser instrument.

Can effectively increase the absorptivity of material for laser light in the way that receives material surface increase coat, metal material to the absorptivity of laser 10%～40%, the absorptivity that has increased the material for laser light of special coat can be brought up to more than 90%, is used widely in the research of laser camouflage material.But, absorb by coat and may cause to reduce the life-span of laser instrument greatly at the inner flue dust that produces of laser instrument to powerful laser instrument.

Summary of the invention

The purpose of this utility model is to overcome the technical disadvantages of above-mentioned several schemes, and a kind of high power laser loss absorption means is provided, and this device utilizes the shape of absorber fully to absorb the loss light of high power laser, and utilizes the cooling fluid heat radiation.

To achieve these goals, the present invention has taked following technical scheme: (same claim)

Design a kind of high power laser loss absorption means, form by absorbing curtain and the cooling framework that is centered around the absorbing curtain edge, the one side of absorbing curtain is as the absorbing surface of laser irradiation, the densely covered impermeable taper hole of array on it, taper angle Φ≤30 of taper hole °, the center distance of adjacent taper hole is less than the awl bed-plate dimension of taper hole, and making in the laser irradiation scope of absorbing surface does not have the plane to exist; Be provided with cooling passage in the described cooling framework.Described absorbing curtain is circle or rectangle; Preferably adopt the fast metal material of heat absorption; The thickness of absorbing curtain is generally 8～20mm.Described taper hole is conical bore or polygon taper hole.

For heat radiation better, the present invention also can adopt following scheme:

Design a kind of high power laser loss absorption means, form by the absorbing curtain that cooling framework and one side are embedded in the cooling framework outwardly, described absorbing curtain face outwardly is as the absorbing surface of laser irradiation, the densely covered impermeable taper hole of array on it, taper angle Φ≤30 of taper hole °, the center distance of adjacent taper hole is less than the awl bed-plate dimension of taper hole, and making in the laser irradiation scope of absorbing surface does not have the plane to exist; The another side of baffle plate is as radiating surface; Be provided with the cooling passage of coiling in the described cooling framework.Described absorbing curtain is circle or rectangle; Preferably adopt the fast metal material of heat absorption; The thickness of absorbing curtain is generally 8～20mm.Described taper hole is conical bore or polygon taper hole.

The principle of absorption that this programme has utilized taper hole repeatedly to reflect, when loss laser beam 3 impinges perpendicularly on absorbing curtain 1, enter taper hole 4, as shown in Figure 1, because the size of awl bottom surface is greater than the center distance L of adjacent two taper hole maximums, the light of laser beam 3 all enters into taper hole 4.When taper angle Φ=30 of taper hole °, first reflection takes place in the laser beam 3 that enters into taper hole 4 at the a1 place, the material that has 40% light to be absorbed baffle plate in this process sponges, 60% light is reflected, reflection for the second time takes place at the a2 place, there is the light of 60% * 40%=24% to be absorbed, the light of 60% * 60%=36% is reflected, reflection for the third time takes place at the a3 place, there is the light of 36% * 40%=14.4% to be absorbed, the light of 36% * 60%=21.6% is reflected, go out to take place the 4th secondary reflection at a4, there is the light of 21.6% * 40%=8.64% to be absorbed, the light of 21.6% * 60%=12.96% is reflected, the 5th secondary reflection takes place at the a5 place, there is the light of 12.96% * 40%=5.18% to be absorbed, the light of 12.96% * 60%=7.78% is reflected, the 6th secondary reflection takes place at the a6 place, there is the light of 7.78% * 40%=3.11% to be absorbed, the light of 778% * 60%=4.67% is reflected, the light that is reflected returns along former road, and the power of laser has dropped to original below 10%, greatly reduces the harm of loss light.When taper angle Φ＜30 °, the order of reflection of loss light in taper hole will be greater than 6 times, and loss light will be absorbed more.

The major advantage of this device is: this device makes loss light repeatedly reflection take place and absorb by the little taper hole of many rows on the light barrier surface, and the loss light more than 90% is all absorbed by the light barrier material.When tapering Φ≤30 of taper hole °, 6 secondary reflections will take place in the loss light of vertical incidence at least in taper hole, each reflection all will produce 40% energy loss, last emergent light accounts for the energy of incident light than being (1-40%) 6, the power of outgoing loss light is reduced greatly, be lower than 10% of incident loss light.This device is very high to the absorption efficiency of loss light, is particularly suitable for the absorption of high power laser loss light, and this device also has advantages such as cost is low, difficulty of processing is little, compact conformation simultaneously.

Description of drawings

Fig. 1 is the principle schematic of taper hole absorption loss light in the utility model.

Fig. 2 is the structural representation of the utility model absorption plant embodiment 1.

Fig. 3 is the baffle arrangement front view of the utility model absorption plant embodiment 3.

Among the figure: 1, absorbing curtain, 2, the cooling framework, 3, the incident laser light beam, 4, taper hole, 5, cooling passage.

The specific embodiment

Be illustrated below in conjunction with Fig. 2,3 couples of three embodiment of the present utility model.

Embodiment 1, be that to beat taper angle be 30 ° conical bore array for the central area of one side of the rectangle carbon steel sheet (or other alloy-steel plate) of 12mm at thickness, the awl bottom surface radius of conical bore is 6mm, the center distance of adjacent conical bore is 4mm, the center distance of adjacent conical bore maximum is 5.66mm, and this plate is absorbing curtain 1.Three ducts that are parallel to the mutual perforation at edge are made a call to by edge on three limits of rectangle carbon steel sheet (or other alloy-steel plate), as cooling passage 5, select cooling fluid can flow through distance two ducts farthest as the import and the outlet of cooling fluid, the edge of this band cooling passage 5 is cooling framework 2.Perhaps establish a plate face and thickness in addition all greater than the carbon steel sheet (or other alloy-steel plate) of absorbing curtain 1, the middle part is emptied, and can embed absorbing curtain 1, establishes cooling passage 5 all around, is used as cooling off framework 2.So form the loss absorption means.

Embodiment 2, with than the thicker rectangle carbon steel sheet (or other alloy-steel plate) of embodiment 1 as absorbing curtain 1, conical bore is not penetrating, and the another side apart from absorbing curtain 1 has certain distance, in this distance, beat and be parallel to absorbing curtain 1 one and arrange penetrating duct, alternately connect each duct and form snakelike cooling passage 5.Perhaps the absorbing curtain among the embodiment 11 is overlayed on the heat sink that has described snakelike cooling passage 5 that presets, form the loss absorption means, this heat sink is promptly as cooling framework 2.Such radiating effect is more a lot of than will get well among the embodiment 1.

Embodiment 3, as Fig. 3, conical bore among embodiment 1 or the embodiment 2 is changed into the taper hole of regular polygon (as regular hexagon), the awl bottom surface of adjacent taper hole like this connects the tightst, and can not produce overlapping, so the awl bottom surface of the taper hole that forms is the most neat, and the light that is radiated in the awl base surface area all can be entered in this taper hole.

Claims

1. high power laser loss absorption means, form by absorbing curtain (1) and the cooling framework (2) that is centered around the absorbing curtain edge, it is characterized in that: the one side of described absorbing curtain (1) is as the absorbing surface of laser irradiation, the densely covered impermeable taper hole (4) of array on it, taper angle Φ≤30 of taper hole °, the center distance of adjacent taper hole is less than the awl bed-plate dimension of taper hole, and making in the laser irradiation scope of absorbing surface does not have the plane to exist; Be provided with cooling passage (5) in the described cooling framework (2).

2. a kind of high power laser loss absorption means as claimed in claim 1 is characterized in that: described absorbing curtain (1) is circle or rectangle.

3. a kind of high power laser loss absorption means as claimed in claim 1 or 2 is characterized in that: described absorbing curtain (1) is a metal material.

4. a kind of high power laser loss absorption means as claimed in claim 3, it is characterized in that: the thickness of described absorbing curtain (1) is 8～20mm.

5. a kind of high power laser loss absorption means as claimed in claim 1 or 2 is characterized in that: described taper hole (4) is conical bore or polygon taper hole.

6. high power laser loss absorption means, form by the absorbing curtain (1) that cooling framework and one side are embedded in the cooling framework (2) outwardly, it is characterized in that: described absorbing curtain (1) face outwardly is as the absorbing surface of laser irradiation, the densely covered impermeable taper hole (4) of array on it, taper angle Φ≤30 of taper hole °, the center distance of adjacent taper hole is less than the awl bed-plate dimension of taper hole, and making in the laser irradiation scope of absorbing surface does not have the plane to exist; The another side of baffle plate is as radiating surface; Be provided with the cooling passage (5) of coiling in the described cooling framework (2).

7. a kind of high power laser loss absorption means as claimed in claim 4 is characterized in that: described absorbing curtain (1) is circle or rectangle.

8. as claim 4 or 5 described a kind of high power laser loss absorption means, it is characterized in that: described absorbing curtain (1) is a metal material.

9. a kind of high power laser loss absorption means as claimed in claim 8, it is characterized in that: the thickness of described absorbing curtain (1) is 8～20mm.

10. as claim 4 or 5 described a kind of high power laser loss absorption means, it is characterized in that: described taper hole (4) is conical bore or polygon taper hole.