CN104931135B - A kind of laser energy meter probe - Google Patents
A kind of laser energy meter probe Download PDFInfo
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- CN104931135B CN104931135B CN201510366816.0A CN201510366816A CN104931135B CN 104931135 B CN104931135 B CN 104931135B CN 201510366816 A CN201510366816 A CN 201510366816A CN 104931135 B CN104931135 B CN 104931135B
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- absorbing sheet
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- energy meter
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Abstract
The invention discloses a kind of laser energy meter probe, including absorber, it is characterized in that, the absorber includes the first absorbing sheet, second absorbing sheet and the 3rd absorbing sheet, according to the direction of Laser Transmission, first absorbing sheet, second absorbing sheet and the 3rd absorbing sheet are arranged in order, first absorbing sheet, second absorbing sheet and the 3rd absorbing sheet pass through hot key and connect as one, the face of the hot key sum is first absorbing sheet, the maximum surface of the second absorbing sheet or the 3rd absorbing sheet, the absorptance of the 3rd absorbing sheets of absorptance ＜ of second absorbing sheets of absorptance ＜ of first absorbing sheet, the laser energy meter absorber of the present invention carries out Gradient Absorption to laser energy, reduce heat balance time and energy loss in measurement process, significantly improve the accuracy of measurement of laser energy meter.
Description
Technical field
The present invention relates to measurement of laser energy technical field, pops one's head in particular to a kind of laser energy meter.
Background technology
High power solid state laser system requirements completes the accurate measurement to large aperture laser energy, will also possess electric calibration
Ability.Traditional measurement of laser energy method is all by the use of a piece of neutral dark glass with single absorptance as suction
Acceptor absorbs laser energy, is changed into the rising of own temperature, the temperature of absorber is laterally being homogenized by hot even body, most
Afterwards, using the elevated value of sensor measures temperature, so as to realize the measurement to laser energy.For large aperture laser energy meter
For, absorbed thickness is thicker, and heat transfer coefficient is relatively low, if heat will be delivered to rear surface needs from the front surface of absorber
Time it is very long, on the other hand and, using single absorption body front surface temperature highest, changed by front surface convection current in measurement process
The energy of heat dissipation is very high, and this results in laser energy and the actual presence deviation that laser energy meter is measured, and accuracy is not high.
All the time, the research emphasis of those skilled in the art are missed with reducing measurement how by Theoretical Calculation calibration measurement result
Difference.
The content of the invention
For above-mentioned problems of the prior art, the present invention provides a kind of laser energy meter probe, the spy of the present invention
The absorber of head carries out Gradient Absorption to laser energy, reduces heat balance time and energy loss in measurement process, hence it is evident that carry
The accuracy of measurement of high laser energy meter.
For achieving the above object, the present invention provides following technical scheme：
A kind of laser energy meter probe, including absorber, the absorber includes the first absorbing sheet, the second absorbing sheet and the
Three absorbing sheets, according to the direction of Laser Transmission, the first absorbing sheet, the second absorbing sheet and the 3rd absorbing sheet are arranged in order, and described
One absorbing sheet, the second absorbing sheet and the 3rd absorbing sheet pass through hot key and connect as one, and the face of the hot key sum is described first
The maximum surface of absorbing sheet, the second absorbing sheet or the 3rd absorbing sheet, second absorbing sheets of absorptance ＜ of first absorbing sheet
The 3rd absorbing sheets of absorptance ＜ absorptance.
Further, the absorptance of first absorbing sheet is 166-241/m, and the absorptance of the second absorbing sheet is 298-
399/m, the absorptance of the 3rd absorbing sheet is 1452-1497/m.
Further, the absorptance of first absorbing sheet is 202/m, and the absorptance of the second absorbing sheet is 346/m, the
The absorptance of three absorbing sheets is 1452/m.
Further, the thickness of first absorbing sheet, the second absorbing sheet and the 3rd absorbing sheet is identical, is 2mm.
Further, the end face of the absorber is surrounded by one layer of heat insulation layer, the end face be with hot key and the vertical face in face.
Further, the heat insulation layer is politef.
Further, the laser entrance face of first absorber is provided with least one tooth-shape structure.
Further, the cross section of the tooth-shape structure is right angled triangle, and the inclined-plane of the tooth-shape structure and first absorbs
The angle on the maximum surface of piece is 56 °.
Further, the cross section of the tooth-shape structure is isosceles triangle, and base angle is 56 °.
Further, the laser energy meter probe also includes hot even body, the hot even body and the 3rd absorbing sheet
Bonding.
Beneficial effects of the present invention are as follows：
1st, of the invention absorber is using 3 absorbing sheet hot keys and forms, and the absorptance of absorbing sheet has gradient,
Ensure that laser energy tends to being uniformly distributed in absorption in vivo, i.e. the temperature of absorber tends to being uniformly distributed, not only shorten measuring
Heat balance time needed for journey, and the loss of temperature in measurement process is reduced, improve the accuracy of measurement；
2nd, the invention provides the optimal absorption coefficient of 3 absorbing sheets, it is in complete that this group of absorptance makes absorption temperature
It is uniformly distributed, in measurement process, heat balance time and temperature losses are minimum, significantly improve the accuracy of measurement result；
3rd, the end face cladding heat insulation layer of absorber, the heat for reducing absorber in measurement process scatter and disappear；
4th, the laser entrance face of the first absorber arranges tooth-shape structure, for adjusting the angle of incidence of laser, it is ensured that absorber
Maximum absorbance to laser；
5th, general laser is vertical incidence, the invention discloses when laser is with 56 ° of incident angles, absorber is to swashing
The absorbance of light is maximum, and tooth-shape structure is squared up triangle or isosceles triangle, it is ensured that laser with 56 ° of incident angles,
Improve accuracy of measurement.
Description of the drawings
Fig. 1 is the absorbent structure schematic diagram of the tooth-shape structure for right angled triangle of the present invention；
Fig. 2 is the laser energy meter overall structure diagram of the present invention；
Fig. 3 is the absorbent structure schematic diagram that the tooth-shape structure of the present invention is isosceles and right angled triangle；
Fig. 4 is the comparative test result of experimental group one and matched group；
Fig. 5 is the comparative test result of experimental group two and matched group.
In figure：1-absorber, the 11-the first absorbing sheet, the 12-the second absorbing sheet, the 13-the three absorbing sheet, 14-adiabatic
Layer, 15-tooth-shape structure, 2-hot even body, 3-sensor, 4-cooling heat sink, 5-sample exchange module, 6-processor, 7-
Host computer, 81-matched group curve, 82-experimental group, one curve, 83-experimental group, two curve.
Specific embodiment
In order that those skilled in the art more fully understand technical scheme, it is with reference to the accompanying drawing of the present invention, right
Technical scheme carries out clear, complete description, and based on the embodiment in the application, those of ordinary skill in the art exist
Other the similar embodiments obtained on the premise of not making creative work, should all belong to the scope of the application protection.
Embodiment one：
As shown in figure 1, a kind of laser energy meter probe, including absorber 1, the absorber 1 include the first absorbing sheet 11,
Second absorbing sheet 12 and the 3rd absorbing sheet 13, according to the direction of Laser Transmission, the first absorbing sheet 11, the second absorbing sheet 12 and the 3rd
Absorbing sheet 13 is arranged in order, and first absorbing sheet 11, the second absorbing sheet 12 and the 3rd absorbing sheet 13 pass through hot key and be connected as
Integrally, the face of described hot key sum is the maximum surface of first absorbing sheet 11, the second absorbing sheet 12 or the 3rd absorbing sheet 13, institute
The absorptance of the 3rd absorbing sheets 13 of absorptance ＜ of second absorbing sheets of absorptance ＜ 12 of the first absorbing sheet 11 is stated, this
Bright absorber 1 is using 3 absorbing sheet hot keys and forms, and the absorptance of absorbing sheet 1 has gradient, it is ensured that laser energy
Tend to being uniformly distributed, i.e. the temperature of absorber 1 tends to being uniformly distributed in absorber 1, not only shorten needed for measurement process
Heat balance time, and the loss of temperature in measurement process is reduced, improve the accuracy of measurement.
First absorbing sheet 11, the second absorbing sheet and the 3rd absorbing sheet 13 are neutral dark glass, and thickness is 2mm, the
The absorptance of one absorbing sheet 11 is 202/m, and the absorptance of the second absorbing sheet 12 is 346/m, the absorption of the 3rd absorbing sheet 13
Coefficient is 1452/m.The invention provides the optimal absorption coefficient of 3 absorbing sheets, this group of absorptance makes 1 temperature of absorber be in
Substantially uniformity is distributed, and in measurement process, heat balance time and temperature losses are minimum, significantly improve the accuracy of measurement result.
The laser entrance face of first absorber 11 is provided with least one tooth-shape structure 15, the horizontal stroke of the tooth-shape structure 15
Section is right angled triangle, and the angle α on the maximum surface of the inclined-plane of the tooth-shape structure 15 and the first absorbing sheet is 56 °, described
Tooth-shape structure 15 is arranged as multiple row 1 surface of absorber is end to end, i.e. the laser entrance face of the first absorbing sheet 11 is provided with multiple
Tooth-shape structure 15.The laser entrance face of the first absorber 11 arranges tooth-shape structure 15, for adjusting the angle of incidence of laser, it is ensured that inhale
Maximum absorbance of the acceptor 1 to laser.General laser is vertical incidence, the invention discloses when laser is entered with 56 ° of angle of incidence
When penetrating, absorber 1 is maximum to the absorbance of laser, tooth-shape structure 15 is squared up triangle, it is ensured that laser is with 56 ° of angle of incidence
Incidence, improves accuracy of measurement.
As shown in Fig. 2 a kind of laser energy meter, including probe, control module and host computer 7, pop one's head in including mutually bonding
Absorber 1, hot even body 2, sensor 3 and cooling heat sink 4, control module includes sample conversion module 5 and processor 6, senses
Device 3 is connected by wire with sample exchange module 5, and sample exchange module 5 is connected by wire with processor 6, processor 6 with it is upper
Position machine 7 is connected by wire.The end face of absorber 1 is surrounded by one layer of heat insulation layer 14, the end face of absorber 1 be with hot key and face hang down
Straight face, that is, remove all surfaces outside maximum surface.14 material of heat insulation layer is politef, and effect is to reduce to measure
In journey, the heat of absorber 1 scatters and disappears, and improves the accuracy of measurement result.
When laser energy meter works, laser vertical incides absorber 1, successively by the first absorbing sheet 11 of absorber 1, the
Two absorbing sheets 12 and the 3rd absorbing sheet 13 absorb, and after absorber 1 absorbs laser energy, own temperature is raised, and energy transmission is to heat
After even body 2 is by its laterally homogeneousization, is detected and be converted to voltage signal by sensor 3 and transmitted to sample exchange module 5, adopted
Voltage signal is converted to digital signal by sample Switching Module 5, and the digital signal is stored and is uploaded to host computer by processor 6
7, by the computed in software of host computer 7, obtain the energy of incident laser.
Embodiment two：
The present embodiment is repeated no more with one identical part of embodiment, except for the difference that：
As shown in figure 3, the cross section of the tooth-shape structure 15 is isosceles triangle and right angled triangle, described first absorbs
The absorptance of piece 11 is 166/m, and the absorptance of the second absorbing sheet 12 is 298/m, and the absorptance of the 3rd absorbing sheet 13 is
1466/m。
Embodiment three：
The present embodiment is repeated no more with one identical part of embodiment, except for the difference that：
The cross section of the tooth-shape structure 15 is isosceles triangle, and the absorptance of first absorbing sheet 11 is 241/m,
The absorptance of the second absorbing sheet 12 is 399/m, and the absorptance of the 3rd absorbing sheet 13 is 1497/m.
Contrast test one：
Absorber of the matched group using single absorptance, absorptance is 525/m, and beam of laser is carried out can measurement
Amount, and (normalization) is calibrated to result；Experimental group one is using the laser energy meter of the embodiment of the present invention two to the Shu Jiguang
Energy is measured, and measurement result is as shown in Figure 4.In addition, the laser energy for not having tooth Shape Design is also counted as by this contrast test
For experimental group two, remaining parameter is identical with experimental group one, as a result as shown in Figure 5.In Fig. 4, abscissa is the time, and vertical coordinate is defeated
Go out signal (unit is volt), the result for measuring is expressed as 82 (thick line of matched group curve 81 (hachure) and one curve of experimental group
Bar), one curve of experimental group 82 is higher than control suite 81 peak values of line, one curve 82 of experimental group Each point in time pair on the right side of the peak value
Also above matched group curve 81, the output signal value answered illustrates that the laser energy value that sensor of the invention 3 is sensed is higher than right
According to group, therefore the structural fidelity of present invention measurement is high.
In Fig. 5, abscissa is the time, and vertical coordinate is output signal (unit is volt), and the matched group curve 81 for measuring is (thin
Lines) and two curve 83 (thick lines) of experimental group, two curve of experimental group 83 is higher than control suite 81 peak values of line, illustrates experimental group
The laser energy peak that two sensor 3 is sensed is higher than matched group, therefore the absorptance gradient of this experimental group absorbing sheet
Design improves measurement structure accuracy.
Moreover, it will be appreciated that although this specification is been described by according to embodiment, not each embodiment is only wrapped
Containing an independent technical scheme, this narrating mode of description is only that those skilled in the art should for clarity
Using description as an entirety, the technical scheme in each embodiment can also Jing it is appropriately combined, form those skilled in the art
Understandable other embodiment.
Claims (10)
1. a kind of laser energy meter probe, including absorber, it is characterised in that the absorber include the first absorbing sheet, second
Absorbing sheet and the 3rd absorbing sheet, according to the direction of Laser Transmission, the first absorbing sheet, the second absorbing sheet and the 3rd absorbing sheet are arranged successively
Row, first absorbing sheet, the second absorbing sheet and the 3rd absorbing sheet are connected as one by thermal bonding, and the face of the thermal bonding is
The maximum surface of first absorbing sheet, the second absorbing sheet or the 3rd absorbing sheet, the absorptance ＜ of first absorbing sheet
The absorptance of the 3rd absorbing sheets of absorptance ＜ of two absorbing sheets.
2. laser energy meter according to claim 1 probe, it is characterised in that the absorptance of first absorbing sheet is
166/m-241/m, the absorptance of the second absorbing sheet is 298/m-399/m, and the absorptance of the 3rd absorbing sheet is 1452/m-
1497/m。
3. laser energy meter according to claim 2 probe, it is characterised in that the absorptance of first absorbing sheet is
202/m, the absorptance of the second absorbing sheet is 346/m, and the absorptance of the 3rd absorbing sheet is 1452/m.
4. laser energy meter according to claim 3 is popped one's head in, it is characterised in that first absorbing sheet, the second absorbing sheet
It is identical with the thickness of the 3rd absorbing sheet, it is 2mm.
5. laser energy meter according to claim 1 is popped one's head in, it is characterised in that the end face of the absorber is surrounded by one layer absolutely
Thermosphere, the end face are the face vertical with the face of thermal bonding.
6. laser energy meter according to claim 5 is popped one's head in, it is characterised in that the heat insulation layer is politef.
7. according to the arbitrary described laser energy meter probe of claim 1-6, it is characterised in that the laser of first absorbing sheet
The plane of incidence is provided with least one tooth-shape structure.
8. laser energy meter according to claim 7 is popped one's head in, it is characterised in that the cross section of the tooth-shape structure is right angle
The angle on the maximum surface of triangle, the inclined-plane of the tooth-shape structure and the first absorbing sheet is 56 °.
9. laser energy meter according to claim 7 is popped one's head in, it is characterised in that the cross section of the tooth-shape structure is isosceles
Triangle, base angle are 56 °.
10. laser energy meter according to claim 1 is popped one's head in, it is characterised in that the laser energy meter probe also includes
The even body of heat, the hot even body are bonded with the 3rd absorbing sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510366816.0A CN104931135B (en) | 2015-06-29 | 2015-06-29 | A kind of laser energy meter probe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510366816.0A CN104931135B (en) | 2015-06-29 | 2015-06-29 | A kind of laser energy meter probe |
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| Publication Number | Publication Date |
|---|---|
| CN104931135A CN104931135A (en) | 2015-09-23 |
| CN104931135B true CN104931135B (en) | 2017-03-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510366816.0A Active CN104931135B (en) | 2015-06-29 | 2015-06-29 | A kind of laser energy meter probe |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107941475A (en) * | 2017-12-18 | 2018-04-20 | 中国工程物理研究院激光聚变研究中心 | A kind of energy measurement and calibration system for large scale laser instrument |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2031378C1 (en) * | 1991-03-26 | 1995-03-20 | Соустов Лев Викторович | Meter of energy of pulse of electromagnetic radiation |
| US5758969A (en) * | 1995-01-12 | 1998-06-02 | Urenco Deutschland Gmbh | Instrument for measuring the energy of optical radiation particularly laser radiation |
| CN103148948A (en) * | 2013-02-06 | 2013-06-12 | 西北核技术研究所 | Device for measuring high-energy laser energy |
| CN103630236A (en) * | 2013-12-11 | 2014-03-12 | 中国工程物理研究院应用电子学研究所 | Conical cavity type high-energy laser total-absorption energy meter |
| CN204705409U (en) * | 2015-06-29 | 2015-10-14 | 中国工程物理研究院激光聚变研究中心 | A kind of laser energy meter probe |
-
2015
- 2015-06-29 CN CN201510366816.0A patent/CN104931135B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2031378C1 (en) * | 1991-03-26 | 1995-03-20 | Соустов Лев Викторович | Meter of energy of pulse of electromagnetic radiation |
| US5758969A (en) * | 1995-01-12 | 1998-06-02 | Urenco Deutschland Gmbh | Instrument for measuring the energy of optical radiation particularly laser radiation |
| CN103148948A (en) * | 2013-02-06 | 2013-06-12 | 西北核技术研究所 | Device for measuring high-energy laser energy |
| CN103630236A (en) * | 2013-12-11 | 2014-03-12 | 中国工程物理研究院应用电子学研究所 | Conical cavity type high-energy laser total-absorption energy meter |
| CN204705409U (en) * | 2015-06-29 | 2015-10-14 | 中国工程物理研究院激光聚变研究中心 | A kind of laser energy meter probe |
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| CN104931135A (en) | 2015-09-23 |
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Inventor after: Tang Ling Inventor after: Xie Xudong Inventor after: Peng Zhitao Inventor after: Hu Dongxia Inventor after: Zhu Qihua Inventor after: Xia Yanwen Inventor after: Chen Ji Inventor after: Wang Lingfang Inventor after: Dang Zhao Inventor after: Wang Chao Inventor after: Wang Fang Inventor after: Li Kehong Inventor after: Zhou Wei Inventor before: Tang Ling Inventor before: Xie Xudong Inventor before: Peng Zhitao Inventor before: Hu Dongxia Inventor before: Zhu Qihua Inventor before: Xia Yanwen Inventor before: Chen Ji Inventor before: Wang Lingfang Inventor before: Dang Zhao Inventor before: Wang Chao Inventor before: Wang Fang Inventor before: Li Kehong Inventor before: Zhou Wei |