CN104950432A - Mechanical laser power attenuation method and structure thereof - Google Patents
Mechanical laser power attenuation method and structure thereof Download PDFInfo
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- CN104950432A CN104950432A CN201410127520.9A CN201410127520A CN104950432A CN 104950432 A CN104950432 A CN 104950432A CN 201410127520 A CN201410127520 A CN 201410127520A CN 104950432 A CN104950432 A CN 104950432A
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- rolling disc
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Abstract
The present invention relates to the technical field of laser power attenuation and discloses a mechanical laser power attenuation method and a structure thereof. The method comprises the following steps that a rotation disk is arranged at the transmission optical path of a laser beam, the rotation disk is provided with a blocking area for blocking the pass of a laser beam and a window area for allowing the laser beam to pass, the blocking area and the window area are alternately arranged around the rotation center of the rotation disk, and the power of the attenuated laser beam is P=P1*(1-S1/S), wherein P1 is the power of the laser beam before attenuation, S1 is the area of the blocking area, and S is the area of the rotation disk. The mechanical laser power attenuation method of the invention is used to carry out attenuation processing on the laser beam, due to the use of the rotation disk and the setting of the blocking area and the window area on the rotation disk, the laser beam goes through the rotation disk intermittently, the effect of laser beam power attenuation is achieved, the use of an optical lens is not needed, the structure is simple, the cost is low, the influence of a laser beam wavelength and a polarization state is zero, and the range of application is wide.
Description
Technical field
The present invention relates to the technical field of laser power attenuating structure, particularly relate to mechanical type laser power damped system and structure thereof.
Background technology
Along with the development of laser technology, the power of laser obtains significant raising, and the measuring equipment for the laser beam of high-power laser instrument it is also proposed very high requirement.Such as, measure the laser power parameters of superpower laser, then need high power laser light power meter, and the price of this kind equipment is very expensive, and long high power is measured, be very easy to the probe damaging this power meter.
For the problems referred to above, Attenuated laser beam according to a certain percentage, measures the laser beam after decay, the better selection that the laser beam becoming superpower laser is measured; By adopting damped system Attenuated laser beam, thus the requirement of its measuring equipment also being reduced greatly, avoiding causing damage to the probe of the measuring equipments such as such as high power laser light power meter, and, also can available protecting measuring equipment.
Damped system of the prior art, adopt optical mirror slip to decay to laser beam, it can be divided into absorption decay and reflective decay, namely by optical mirror slip absorbing laser light beam or reflect beams of laser light.Optical mirror slip is adopted to there is following defect to the method that laser beam is decayed: first, optical mirror slip is limited to wavelength and the polarization state of laser beam, and be difficult to the laser beam being applicable to wide scope, it is of limited application; Secondly, the general cost of optical mirror slip is very high.
Summary of the invention
The object of the present invention is to provide mechanical type laser power damped system, be intended to solve in prior art, adopt the power of optical mirror slip to laser beam to decay, there is the problem that operation strategies is limited and cost is high.
The present invention realizes like this, mechanical type laser power damped system, transmission light path in laser beam arranges rotating rolling disc, the Kong Chuan district it being formed with the blocking-up district passed for blocking laser light beam and passing for laser beam, and described blocking-up district and Kong Chuan district mutually replace and center of rotation around described rolling disc is arranged;
Power P=the P of the laser beam after decay
1× (1-S
1/ S), wherein, P
1for the power of unbated laser beam, S
1for blocking the area in district, S is the area of rolling disc.
Present invention also offers mechanical type laser power attenuating structure, comprise the transmission light path and rotating rolling disc that are placed in laser beam, the Kong Chuan district which is provided with the blocking-up district passed for blocking laser light beam and pass for laser beam, described blocking-up district and Kong Chuan district replace mutually and center of rotation around described rolling disc is arranged.
Compared with prior art, mechanical type laser power damped system of the present invention is utilized to carry out attenuation processing to laser beam, because it adopts rolling disc, and blocking Ji Kongchuan district of district by arranging on rolling disc, making laser beam discontinuous through rolling disc, and the effect reached laser beam power decay, it does not need to adopt optical mirror slip, and structure is simple, and cost is low, and can not the impact of Stimulated Light light beam wavelength and polarization state, applied widely.
Accompanying drawing explanation
Fig. 1 is the schematic front view of the mechanical type laser power attenuating structure that the embodiment of the present invention provides;
Fig. 2 is the in running order schematic perspective view of mechanical type laser power attenuating structure that the embodiment of the present invention provides.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Below in conjunction with specific embodiment, realization of the present invention is described in detail.
As shown in Fig. 1 ~ 2, it is preferred embodiment provided by the invention.
The mechanical type laser power damped system that the present embodiment provides; for the laser beam 2 emitted laser instrument 3; decay according to a certain percentage; high-power laser beam 2 is made to form lower powered laser beam; thus be convenient to utilize the measuring equipments such as power meter to measure the laser beam after decay; avoid the tip damage in power meter, and, effectively can protect power meter.
Above-mentioned mechanical type laser power damped system is as follows:
In the transmission light path of laser beam 2, rotating rolling disc 1 is set, this rolling disc 1 is that angle is arranged with the transmission light path of laser beam 2, the Kong Chuan district 11 it being formed with the blocking-up district 12 passed for blocking laser light beam 2 and passing for laser beam 2, and block district 12 and Kong Chuan district 11 center of rotation mutually alternately and around rolling disc 1 and arrange.
Be formed in rolling disc 1 and block district 12 and Kong Chuan district 11, rolling disc 1 passes for blocking laser light beam 2 in this blocking-up district 12,11, Kong Chuan district can be used for laser beam 2 through rolling disc 1, and block district 12 mutually alternately to arrange with Kong Chuan district 11, and arrange around the center of rotation of rolling disc, like this, when rolling disc 1 is in the process of rotating, laser beam 2 be blocked state and through state mutual checker;
Rolling disc 1 is according to fixing rotational speed, and wherein, the frequency F of rolling disc 1 blocking laser then equals the frequency f that rolling disc 1 rotates and is multiplied by the number n blocking district 12 in rolling disc 1, i.e. F=f × n;
The power proportions R of the laser beam that rolling disc 1 attenuates equals the area S blocking district 12
1divided by the area S of rolling disc 1, i.e. R=S
1/ S;
Like this, the power P of the laser beam after rolling disc 1 is decayed is then:
P=P
1× (1-R), i.e. P=P
1× (1-S
1/ S), wherein P
1for the general power of unbated laser beam 2.
Like this, by changing the area in the blocking-up district 12 on rolling disc 1, then can realize the attenuation ratio changing rolling disc 1.
Above-mentioned rolling disc 1 is disk, blocks district 12 and is formed at the sector region on rolling disc 1 respectively with Kong Chuan district 11.Certainly, as other embodiment, rolling disc 1 also can be square other shape such as grade.
In order to realize decaying to the multilayer of laser beam 2, in the transmission light path of laser beam 2, be provided with multiple above-mentioned rolling disc 1, multiple rolling disc 1 is alternate to be arranged in parallel, and utilizes the plurality of rolling disc sequentially to decay to laser beam, certainly, the power of the laser beam after decay is: P=P
1× (1-S
1/ S)
m, wherein, m is the number of rolling disc 1.
The blocking-up district of above-mentioned rolling disc, can utilize reflection to block and irradiate laser beam thereon, and now, the transmission light path of rolling disc and laser beam is that angle is arranged; Certainly, when also light-absorption layer can be set in blocking-up district 12, now, it is that angle is arranged that rolling disc 1 can not need with the transmission light path of laser beam 2, also can arrange in vertical configuration, now, under the effect of light-absorption layer, the laser beam 2 irradiated thereon can be absorbed.
Or, as other embodiment, can arrange unidirectional light trap in the front in the blocking-up district 12 of rolling disc 1, this unidirectional light trap is arranged in the transmission light path of laser beam 2, the laser beam 2 that laser instrument 3 sends can pass unidirectional light trap, is incident on rolling disc 1; Certainly, rolling disc 1 now can be vertical configuration with the transmission light path of laser beam 2, through the laser that rolling disc 1 reflects, under the obstruct of unidirectional light trap, can not penetrate back laser instrument.
Or, multiple strip-shaped grooves can be set on the surface blocking district 12, this strip-shaped grooves has the opening being formed in and blocking on surface, district 12, and bottom is towards the blocking-up tilted extension in district 12, when laser beam 2 is radiated at after on the surface blocking district 12, laser beam 2 directly enters the inside of strip groove by the opening of strip groove, and, formed therein and repeatedly launch, and be limited in strip groove, like this, then play the effect of blocking laser light beam 2, and avoid laser beam 2 directly reflect back into laser.Therefore, when when blocking district 12 and arranging strip groove, rolling disc 1 can be also that vertical configuration is arranged with the transmission light path of laser beam 2, or layout also can in angle.
Utilize the above-mentioned mechanical type laser power damped system provided, decay to the laser beam 2 that laser instrument 3 emits, it adopts mechanical type device, do not need to use optical mirror slip, thus can not the wavelength of Stimulated Light light beam 2 and polarization state impact, usable range is wide, and cost is also low.
According to above-mentioned mechanical type laser power damped system, present embodiments provide mechanical type laser power attenuating structure, it comprises rolling disc 1, rolling disc 1 is arranged in the transmission light path of the laser beam 2 of laser instrument 3, is in tilted layout, like this with laser beam 2 in angle, avoid the reflection that it produces laser, laser instrument 3 is impacted, and, this rolling disc 1 with its disk center for run-on point is rotated.
In above-mentioned laser power attenuating structure, it is decayed by the power arranging the rolling disc 1 pair of laser beam 2 constantly rotated, do not need to adopt optical mirror slip, can by the blocking-up district 12 and 11, Kong Chuan district that arrange alternate layout on rolling disc 1, and then can the power of laser beam after the decay of the place of calculating by above-mentioned formula, its whole process is come completely, therefore, also can be defined as mechanical type laser power attenuating structure by mechanical devices completely.
The wavelength of the laser beam 2 that mechanical type laser power attenuating structure can not send in Stimulated Light device 3 and polarization state restriction, can the laser beam 2 of compatible different wave length and different polarization state, and it is applied widely, and structure is simple, and cost is low.
Rolling disc 1 is in a certain angle to be arranged in the transmission light path of laser beam 2, and certainly, for the ease of design, generally, rolling disc 1 is that 45 ° of angles are arranged with the transmission light path of laser beam 2.
Above-mentioned blocking-up district 12 adopts the mode blocking laser light beam 2 of reflection, certainly, as other embodiment, also light-absorption layer can be coated with on the surface blocking district 12, utilize this light-absorption layer, the laser beam 2 being radiated at and blocking in district 12 can be absorbed, play the effect of blocking laser light beam 2 too.Further, when arranging light-absorption layer in blocking-up district 12, now, it is that angle is arranged that rolling disc 1 can not need with the transmission light path of laser beam 2, also can arrange in vertical configuration, now, under the effect of light-absorption layer, the laser beam 2 irradiated thereon can be absorbed.
Or, as other embodiment, multiple strip-shaped grooves can be set on the surface blocking district 12, this strip-shaped grooves has the opening being formed in and blocking on surface, district 12, and bottom is towards the blocking-up tilted extension in district 12, when laser beam 2 is radiated at after on the surface blocking district 12, laser beam 2 directly enters the inside of strip groove by the opening of strip groove, and, formed therein and repeatedly launch, and be limited in strip groove, like this, then play the effect of blocking laser light beam 2, and avoid laser beam 2 directly reflect back into laser.Therefore, when when blocking district 12 and arranging strip groove, rolling disc 1 can be also that vertical configuration is arranged with the transmission light path of laser beam 2, or layout also can in angle.
Or can arrange unidirectional light trap in the front in the blocking-up district 12 of rolling disc 1, this unidirectional light trap is arranged in the transmission light path of laser beam 2, the laser beam 2 that laser instrument 3 sends can pass unidirectional light trap, is incident on rolling disc 1; Certainly, rolling disc 1 now can be vertical configuration with the transmission light path of laser beam 2, through the laser that rolling disc 1 reflects, under the obstruct of unidirectional light trap, can not penetrate back laser instrument.
Rolling disc 1 is disk, it take disc centre as center of rotation, wherein, blocking-up district 12 and Kong Chuan district 11 are for being formed in the sector region in this disk, like this, blocking-up district 12 and the Kong Chuan district 11 of regular shape are arranged, and are convenient to the manufacture of this rolling disc 1, certainly, concrete area can design according to the ratio that will decay to laser beam 2.
In the present embodiment, rolling disc 1 is formed multiple blocking-up district 12 and multiple Kong Chuan district 11, and, blocking-up district 12 on rolling disc 1 and Kong Chuan district 11 alternately arrange mutually, like this, by arranging multiple blocking-up district 12 and multiple Kong Chuan district 11, can make laser be blocked state and through state convert comparatively frequent, its power to laser beam 2 can be avoided to produce larger influence of fluctuations.Certainly, along with the velocity of rotation of rolling disc 1 is accelerated, also can reduce rolling disc 1 affects the power swing of laser beam 2.
In the present embodiment, the area equation in multiple blocking-up district 12, compares shape also consistent, evenly distributes alternately, like this, be then greatly convenient to the manufacture of rolling disc 1.
Certainly, in order to carry out multilayer decay to laser beam 2, mechanical type laser power attenuating structure comprises multiple above-mentioned rolling disc 1, multiple rolling disc 1 parallel spaced-apart is arranged in the transmission light path of laser beam 2, the plurality of attenuator sequentially parallel spaced-apart is arranged, sequentially carries out attenuation processing to the power of laser beam 2.Certainly, multiple rolling disc 1 also cannot non-parallelly be arranged, if its be skewed then can, vertically with the transmission light path of laser beam 2 then can not.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. mechanical type laser power damped system, it is characterized in that, transmission light path in laser beam arranges rotating rolling disc, the Kong Chuan district it being formed with the blocking-up district passed for blocking laser light beam and passing for laser beam, and described blocking-up district and Kong Chuan district mutually replace and center of rotation around described rolling disc is arranged;
Power P=the P of the laser beam after decay
1× (1-S
1/ S), wherein, P
1for the power for laser beam before decay, S
1for blocking the area in district, S is the area of rolling disc.
2. mechanical type laser power damped system as claimed in claim 1, it is characterized in that, the transmission light path of described rolling disc and described laser beam is that angle is arranged.
3. mechanical type laser power damped system as claimed in claim 1, it is characterized in that, described blocking-up district is provided with multiple strip groove or is coated with light-absorption layer, described strip groove has the opening be formed on surface, described blocking-up district, extend towards the medium dip of described blocking-up district bottom it, be radiated at the laser beam on described strip groove, multiple reflections in described strip groove, and be restricted in described strip groove.
4. the mechanical type laser power damped system as described in any one of claims 1 to 3, it is characterized in that, in the transmission light path of described laser beam, be provided with the rolling disc of multiple described alternate parallel arrangement, and be P=P by the power of the laser beam after multiple described rolling disc decay
1× (1-S
1/ S)
m, wherein, m is the number of rolling disc.
5. mechanical type laser power attenuating structure, it is characterized in that, comprise the transmission light path and rotating rolling disc that are placed in laser beam, the Kong Chuan district which is provided with the blocking-up district passed for blocking laser light beam and pass for laser beam, described blocking-up district and Kong Chuan district replace mutually and center of rotation around described rolling disc is arranged.
6. mechanical type laser power attenuating structure as claimed in claim 5, it is characterized in that, the surface in described blocking-up district is coated with the light-absorption layer for absorbing laser light beam.
7. mechanical type laser power attenuating structure as claimed in claim 5, it is characterized in that, described blocking-up district is provided with multiple strip groove for being limited by laser beam in the inner, described strip groove has the opening be formed on surface, described blocking-up district, extends bottom it towards the medium dip of described blocking-up district.
8. the mechanical type laser power attenuating structure as described in any one of claim 5 to 7, is characterized in that, the transmission light path of described rolling disc and described laser beam is that angle is arranged.
9. the mechanical type laser power attenuating structure as described in any one of claim 5 to 7, is characterized in that, described rolling disc is disk, and described blocking-up district and described Kong Chuan district are respectively the sector region be formed on described disk.
10. the mechanical type laser power attenuating structure as described in any one of claim 5 to 7, is characterized in that, described rolling disc is multiple, and multiple described rolling disc interphase distribution respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410127520.9A CN104950432B (en) | 2014-03-31 | 2014-03-31 | Mechanical laser power damped system and its structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410127520.9A CN104950432B (en) | 2014-03-31 | 2014-03-31 | Mechanical laser power damped system and its structure |
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| Publication Number | Publication Date |
|---|---|
| CN104950432A true CN104950432A (en) | 2015-09-30 |
| CN104950432B CN104950432B (en) | 2017-12-15 |
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|---|---|---|---|
| CN201410127520.9A Active CN104950432B (en) | 2014-03-31 | 2014-03-31 | Mechanical laser power damped system and its structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109828333A (en) * | 2019-04-12 | 2019-05-31 | 哈尔滨工业大学 | A kind of carbon dioxide heat sealing machine and its method for carrying out welding |
| CN114740615A (en) * | 2022-04-11 | 2022-07-12 | 南京邮电大学 | Adjustable terahertz attenuator and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109828333A (en) * | 2019-04-12 | 2019-05-31 | 哈尔滨工业大学 | A kind of carbon dioxide heat sealing machine and its method for carrying out welding |
| CN114740615A (en) * | 2022-04-11 | 2022-07-12 | 南京邮电大学 | Adjustable terahertz attenuator and preparation method thereof |
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| Publication number | Publication date |
|---|---|
| CN104950432B (en) | 2017-12-15 |
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