CN103604495B - A kind of high energy laser beam parasitic light energy gauge - Google Patents
A kind of high energy laser beam parasitic light energy gauge Download PDFInfo
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- CN103604495B CN103604495B CN201310582846.6A CN201310582846A CN103604495B CN 103604495 B CN103604495 B CN 103604495B CN 201310582846 A CN201310582846 A CN 201310582846A CN 103604495 B CN103604495 B CN 103604495B
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Abstract
The invention provides a kind of high energy laser beam parasitic light energy gauge, described measuring system contains several absorption diaphragm, thermocouple temperature sensor, diaphragm fixed support, lead-in wire, temperature collect module, the network switch, host computer.Absorbing diaphragm is the cirque structure that duralumin or red copper are made, and absorb the V-type groove that diaphragm side to light is provided with annular, surface is Mixture of alumina and titania coating.Thermocouple temperature sensor is adhered to the thermocouple temperature sensor absorbing the setting of diaphragm shady face and fixes in slot.Thermocouple temperature sensor adopts and is connected in series, and is electrically connected to temperature collect module by lead-in wire.Temperature collect module, the network switch, host computer are set up by netting twine becomes Distributed Measurement System.The present invention effectively can realize the kinetic measurement of high energy laser beam parasitic light complex distributions on a large scale, and significantly improves measuring accuracy, and standardized module design makes system have extensibility and portability.
Description
Technical field
The invention belongs to energy measurement of high energy laser fields of measurement, be specifically related to a kind of high energy laser beam parasitic light energy gauge, be applicable to the energy measurement of annular high energy laser beam parasitic light.
Background technology
In superlaser transmitting procedure, the existence of the high fdrequency component parasitic light such as passage inner laser bundle diffraction, high-order mode, optical element scattering is the key factor causing Laser Transmission efficiency to reduce, cause portion of energy to lose.The energy loss that parasitic light causes can produce significant impact to beam Propagation, energy loss causes the overall temperature rise of passage, the beam Propagation of internal channel is made to produce serious wavefront distortion and beam drift, temperature rise causes the structural deformation such as mirror holder in internal channel and passage to cause the drift of light beam, and time serious, light beam may damage internal channel and even cannot normally export.But, there is no the special test equipment for the energy measurement of high energy laser beam parasitic light at present, its major design bottleneck is: on the one hand, superlaser is longer near field transmission distance, and usually reach tens of rice, the energy loss that parasitic light causes covers whole transmission path, and parasitic light spatially highly overlaps with high energy laser beam, distribution character is extremely complicated, does not also have the report of high energy laser beam parasitic light distribution character aspect at present, and this causes great difficulty to parasitic light energy measurement; On the other hand, parasitic light Strength Changes is comparatively large, and part signal signal to noise ratio (S/N ratio) is lower, and site environment is complicated, higher to the measuring accuracy requirement of system, how to obtain larger signal to noise ratio (S/N ratio) and higher measuring accuracy is also need key problems-solving.
Summary of the invention
In order to realize the kinetic measurement to high energy laser beam parasitic light complex distributions on a large scale, and improving the precision of energy measurement, the invention provides a kind of high energy laser beam parasitic light energy gauge.
A kind of high energy laser beam parasitic light energy gauge, be characterized in, described measuring system comprises several absorption diaphragm, thermocouple temperature sensor, diaphragm fixed support, lead-in wire, temperature collect module, the network switch, host computer; Described absorption diaphragm is annular; Its annexation is, described absorption diaphragm is connected with diaphragm fixed support by screw thread; Absorption diaphragm shady face is provided with array thermocouple temperature sensor and fixes slot, and the thermocouple temperature sensor often organized is fixed slot and is all arranged on concentric circle corresponding to absorption diaphragm shady face; Thermocouple temperature sensor is adhered to thermocouple temperature sensor and fixes in slot, and thermocouple temperature sensor is electrically connected with temperature collect module by lead-in wire; Temperature collect module is by netting twine and network exchange mechatronics; The network switch is electrically connected with host computer by netting twine; Several absorption diaphragm is arranged on the transmission path of superlaser.
The described thermocouple temperature sensor often organized fixes that slot is equidistant to be arranged on a concentric circle.
Described absorption diaphragm side to light is provided with the V-type groove of annular, and the bottom land of several V-type groove forms one group of annulus, and the center of circle of annulus overlaps with the center of circle absorbing diaphragm.
The scope of described V-type groove angle α is 20 ° ~ 60 °; The degree of depth of described V-type groove is less than or equal to 0.5 times that absorbs diaphragm thickness.
The internal diameter of described absorption diaphragm is 1.05 ~ 1.1 times of measured laser bundle external diameter, and the external diameter absorbing diaphragm is more than or equal to 2 times of measured laser bundle external diameter.
The working end of described thermocouple temperature sensor is dew end type.
The working end of described thermocouple temperature sensor embeds the thermocouple temperature sensor absorbing the setting of diaphragm shady face and fixes in slot; Each absorption diaphragm is bonded with the identical thermocouple temperature sensor of structure of arrays, the thermocouple temperature sensor correspondence often organized is bonded in thermocouple temperature sensor and fixes in slot; The thermocouple temperature sensor often organized adopts and is connected in series, and is electrically connected with temperature collect module by lead-in wire.
The material that described absorption diaphragm adopts is duralumin or red copper, and the surface of absorption diaphragm side to light is the coating through high-temperature plasma spray aluminum oxide and titania mixture.
In order to realize the kinetic measurement to high energy laser beam parasitic light complex distributions on a large scale, absorbing diaphragm, temperature collect module in the present invention all adopts standard modular to design, and adopt distributed system layout, the absorption diaphragm of multiple independent design is arranged on the transmission path of superlaser, the temperature collect module utilizing multiple standard modular to design and the network switch, host computer establishment Distributed Measurement System.Host computer sends top level control order to each temperature collect module by the network switch, resolve after each temperature collect module receives order and be converted to the order of bottom acquisition hardware control circui, realize synchronous acquisition to control, and the data after gathering are sent to host computer by the network switch and carry out data processing and display.
In order to realize high-precision energy measurement, this invention takes four technical measures: one is improve to absorb the absorption efficiency of apertured sheet in the face of high energy laser beam parasitic light, absorption diaphragm side to light surface is the coating through high-temperature plasma spray aluminum oxide and titania mixture, make to absorb diaphragm single absorption efficiency and reach 80%, absorbing the V-type groove design of diaphragm side to light increase annular, thus increase the side to light surface area absorbing diaphragm, and make superlaser parasitic light, in V-type groove inside, repeatedly diffuse reflection occur; Two is reduce thermal loss, absorbs diaphragm and is connected with diaphragm fixed support by screw thread, and increase teflon heat insulating mattress between screw thread, thus reduce the heat transfer absorbed between diaphragm and fixed support, effectively suppresses the energy loss that heat transfer causes; Three is guarantee temperature sensor measurement accurately with quick, thermocouple temperature sensor working end is set to dew end type, thus shorten the response time, during installation, the bottom that diaphragm shady face thermocouple temperature sensor fixes slot is closely pressed close to absorb in its working end, to ensure to press close to absorb diaphragm side to light to greatest extent; Four is improve signal to noise ratio (S/N ratio), each absorption diaphragm shady face is all provided with the identical thermocouple temperature sensor of structure of arrays, the thermocouple temperature sensor correspondence often organized is bonded in the thermocouple temperature sensor be arranged on the concentric circle absorbing diaphragm shady face and fixes slot, the thermocouple temperature sensor often organized adopts and is connected in series, thus improves the signal to noise ratio (S/N ratio) of signal.
The kinetic measurement that the present invention adopts distributed system layout to realize high energy laser beam parasitic light complex distributions on a large scale, by improve absorb apertured sheet in the face of parasitic light absorption efficiency, reduce energy loss that heat transfer causes, improve thermocouple temperature sensor response speed and thermometric accuracy, improve the technical measures such as the signal to noise ratio (S/N ratio) of signal to promote the precision of energy measurement.The present invention can realize the effective measurement to high energy laser beam parasitic light energy and distribution character, and significantly improves system capacity measuring accuracy, and standard modular design makes system be with good expansibility and portability.
Accompanying drawing explanation
Fig. 1 is high energy laser beam parasitic light energy gauge structural representation of the present invention;
Fig. 2 (a) is the absorption mechanism of diaphragm schematic diagram in the present invention, and (b) is the diagrammatic cross-section absorbing diaphragm AA place, and (c) is the partial enlarged drawing absorbing diaphragm I place;
Fig. 3 is the thermocouple temperature sensor mounting arrangement schematic diagram in the present invention;
Fig. 4 is that the thermocouple temperature sensor in the present invention is connected in series schematic diagram;
In figure, 1. absorb diaphragm 2. thermocouple temperature sensor 3. diaphragm fixed support 4. 5. temperature collect module 6. network switch 7. host computer 8. thermocouple temperature sensors that go between and fix slot.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further described.
Embodiment 1
Fig. 1 is high energy laser beam parasitic light energy gauge structural representation of the present invention, Fig. 2 (a) is the absorption mechanism of diaphragm schematic diagram in the present invention, b () is for absorbing the diagrammatic cross-section at diaphragm AA place, c () is for absorbing the partial enlarged drawing at diaphragm I place, Fig. 3 is the thermocouple temperature sensor mounting arrangement schematic diagram in the present invention, and Fig. 4 is that the thermocouple temperature sensor in the present invention is connected in series schematic diagram.In Fig. 1 ~ Fig. 4, high energy laser beam parasitic light energy gauge of the present invention comprises several absorption diaphragm, thermocouple temperature sensor 2, diaphragm fixed support 3, lead-in wire 4, temperature collect module 5, the network switch 6, host computer 7; Described absorption diaphragm 1 is annular; Its annexation is, described absorption diaphragm 1 is connected with diaphragm fixed support 3 by screw thread; Absorption diaphragm 1 shady face is provided with array thermocouple temperature sensor and fixes slot 8, and the thermocouple temperature sensor often organized is fixed slot 8 and is all arranged on concentric circle corresponding to absorption diaphragm 1 shady face; Thermocouple temperature sensor 2 is adhered to thermocouple temperature sensor and fixes in slot 8, and thermocouple temperature sensor 2 is electrically connected with temperature collect module 5 by lead-in wire 4; Temperature collect module 5 is electrically connected with the network switch 6 by netting twine; The network switch 6 is electrically connected with host computer 7 by netting twine; Several absorption diaphragm is arranged on the transmission path of superlaser.
The described thermocouple temperature sensor often organized fixes that slot 8 is equidistant to be arranged on a concentric circle, and the quantity that the thermocouple temperature sensor on each concentric circle fixes slot is equal.
Described absorption diaphragm 1 side to light is provided with the V-type groove of annular, and the bottom land of several V-type groove forms one group of annulus, and the center of circle of annulus overlaps with the center of circle absorbing diaphragm 1.
In the present embodiment, described V-type groove angle α is 20 °; The degree of depth of described V-type groove equals 0.5 times that absorbs diaphragm 1 thickness.The internal diameter of described absorption diaphragm 1 is 1.05 times of measured laser bundle external diameter, and the external diameter absorbing diaphragm 1 equals 2 times of measured laser bundle external diameter.
The annular superlaser main beam of input passes from absorption diaphragm 1 center hole the present invention, the annulus of the high fdrequency component parasitic light absorbed light door screen 1 that main beam periphery exists blocks and absorbs, and parasitic light energy gauge can not be had an impact to the transmission of main laser bundle; Absorbing diaphragm 1 to be connected with diaphragm fixed support 3 by screw thread, in order to reduce the heat transfer absorbed between diaphragm 1 and the external world, adding teflon heat insulating mattress between the threads; Absorption diaphragm 1 shady face is provided with thermocouple temperature sensor and fixes slot 8, the working end of thermocouple temperature sensor 2 embeds wherein, and is adhesively fixed with high-temperature heat-conductive glue; Thermocouple temperature sensor 2 is electrically connected with temperature collect module 5 by lead-in wire 4; Because superlaser transmission path is longer, obtain diverse location place parasitic light energy and distribution character to need in light path, arrange multiple measuring point, multiple test point synchronous acquisition control and high-resolution hydrocode problem within the scope of a larger space is distributed in order to solve, native system adopts distributed system layout, temperature collect module 5 is designed to standardized module, possesses order reception and be stored in transfer function with parsing, temperature data Real-time Collection, data; Temperature collect module 5 receives the top level control order sent from host computer 7 by the network switch 6 after, parsing is converted to the order of bottom acquisition hardware control circui and realizes multichannel synchronousing collection.Data after collection are sent to host computer 7 by the network switch 6 and carry out data processing and display, as shown in Figure 1.
In Fig. 2, absorbing diaphragm 1 material is duralumin; Absorption diaphragm 1 side to light surface is the coating through high-temperature plasma spray aluminum oxide and titania mixture, makes the single absorptivity of material surface to laser parasitic light reach 80%, and the adhesion that coating has excellence can be combined with absorption diaphragm 1 intimate surface; Absorbing the measuring error of interference introducing mutually between diaphragm 1 in order to reduce multiple measuring point, absorbing diaphragm 1 shady face and adopting black anode oxidation process process; Absorb V-type groove diaphragm 1 side to light being provided with uniformly annular, the setting of V-type groove can increase the surface area absorbing diaphragm 1 side to light, and make superlaser parasitic light, in V-type groove inside, repeatedly diffuse reflection occur, thus promote absorption diaphragm 1 side to light to the absorption efficiency of parasitic light.
In figure 3, the working end of described thermocouple temperature sensor 2 embeds and absorbs the thermocouple temperature sensor that diaphragm 1 shady face arranges and fix in slot 8, and thermocouple temperature sensor and thermocouple temperature sensor fix that slot is corresponding to be arranged.In order to make, the thermometric response of thermocouple temperature sensor 2 is rapider, measurement is more accurate, the working end of thermocouple temperature sensor 2 is dew end type, thus the shortening heat galvanic couple temperature sensor response time, during installation, the critical closely connected nearly thermocouple temperature sensor in its working end fixes the bottom of slot 8, to ensure that pressing close to absorb diaphragm 1 side to light to greatest extent makes to measure more accurately, and make firmly to be connected between its with absorption diaphragm 1 with gluing the connecing of high-temperature heat-conductive, according to high energy laser beam parasitic light mechanism of production and characteristic, parasitic light is radiated at and absorbs the probability of diaphragm 1 near external diameter much smaller than the probability near internal diameter, according to completely independently thermocouple temperature sensor layout, the thermoelectrical potential produced near the thermocouple temperature sensor 2 absorbing diaphragm 1 external diameter then can be caused less, very easily be submerged in the system noise of temperature collect module 5, simultaneously, the port number of temperature collect module 5 also can be caused to become the growth of several times, therefore each absorption diaphragm 1 is bonded with the identical thermocouple temperature sensor of three twelve earthly branches structures, thermocouple temperature sensor is divided into four groups, eight the thermocouple temperature sensor correspondences often organized are bonded in the thermocouple temperature sensor be arranged on the concentric circle absorbing diaphragm 1 shady face and fix slot, the thermocouple temperature sensor often organized adopts and is connected in series, and is electrically connected with temperature collect module by lead-in wire.
In Fig. 4, eight thermocouple temperature sensors adopt the connected mode welding of series connection.This connected mode can obtain higher signal to noise ratio (S/N ratio), and also can obtain the power density distribution characteristic of parasitic light on absorption diaphragm 1 by calculating while measuring parasitic light energy.
Embodiment 2
Embodiment 2 is substantially identical with embodiment 1 structure, difference is, the internal diameter absorbing diaphragm in the present embodiment is 1.1 times of measured laser bundle external diameter, the V-type groove angle α absorbing the annular that diaphragm side to light is arranged is 45 °, each absorption diaphragm is bonded with the identical thermocouple temperature sensor of 64 structures, thermocouple temperature sensor is divided into four groups, 16 the thermocouple temperature sensor correspondences often organized are bonded in the thermocouple temperature sensor be arranged on the concentric circle absorbing diaphragm shady face and fix slot, and absorbing aperture material is red copper.
Embodiment 3
Embodiment 3 is substantially identical with embodiment 1 structure, difference is, the V-type groove angle α absorbing the annular that diaphragm side to light is arranged in the present embodiment is 60 °, each absorption diaphragm is bonded with the identical thermocouple temperature sensor of 40 structures, thermocouple temperature sensor is divided into five groups, and eight the thermocouple temperature sensor correspondences often organized are bonded in the thermocouple temperature sensor be arranged on the concentric circle absorbing diaphragm shady face and fix slot.
Claims (8)
1. a high energy laser beam parasitic light energy gauge, comprises several absorption diaphragm, thermocouple temperature sensor (2), and described absorption diaphragm (1) is annular; It is characterized in that: described measuring system also comprises diaphragm fixed support (3), lead-in wire (4), temperature collect module (5), the network switch (6), host computer (7); Its annexation is, described absorption diaphragm (1) is connected with diaphragm fixed support (3) by screw thread; Absorption diaphragm (1) shady face is provided with array thermocouple temperature sensor and fixes slot (8), and the thermocouple temperature sensor often organized is fixed slot (8) and is all arranged on concentric circle corresponding to absorption diaphragm (1) shady face; Thermocouple temperature sensor (2) is adhered to thermocouple temperature sensor and fixes in slot (8), and thermocouple temperature sensor (2) is electrically connected with temperature collect module (5) by lead-in wire (4); Temperature collect module (5) is electrically connected with the network switch (6) by netting twine; The network switch (6) is electrically connected with host computer (7) by netting twine; Several absorption diaphragm is arranged on the transmission path of superlaser.
2. high energy laser beam parasitic light energy gauge according to claim 1, is characterized in that: the described thermocouple temperature sensor often organized fixes that slot (8) is equidistant to be arranged on concentric circle.
3. high energy laser beam parasitic light energy gauge according to claim 1, it is characterized in that: described absorption diaphragm (1) side to light is provided with the V-type groove of annular, the bottom land of several V-type groove forms one group of annulus, and the center of circle of annulus overlaps with the center of circle absorbing diaphragm (1).
4. high energy laser beam parasitic light energy gauge according to claim 3, is characterized in that: the scope of described V-type groove angle α is 20 ° ~ 60 °; The degree of depth of described V-type groove is less than or equal to 0.5 times that absorbs diaphragm (1) thickness.
5. high energy laser beam parasitic light energy gauge according to claim 1, it is characterized in that: the internal diameter of described absorption diaphragm (1) is 1.05 ~ 1.1 times of measured laser bundle external diameter, the external diameter absorbing diaphragm (1) is more than or equal to 2 times of measured laser bundle external diameter.
6. high energy laser beam parasitic light energy gauge according to claim 1, is characterized in that: the working end of described thermocouple temperature sensor (2) is dew end type.
7. high energy laser beam parasitic light energy gauge according to claim 1, is characterized in that: the working end of described thermocouple temperature sensor (2) embeds the thermocouple temperature sensor absorbing the setting of diaphragm (1) shady face and fixes in slot (8); Each absorption diaphragm (1) is bonded with the identical thermocouple temperature sensor of structure of arrays, and the thermocouple temperature sensor correspondence often organized is bonded in thermocouple temperature sensor and fixes in slot; The thermocouple temperature sensor often organized adopts and is connected in series, and is electrically connected with temperature collect module by lead-in wire.
8. high energy laser beam parasitic light energy gauge according to claim 1, it is characterized in that: the material that described absorption diaphragm (1) adopts is duralumin or red copper, the surface of absorption diaphragm (1) side to light is the coating through high-temperature plasma spray aluminum oxide and titania mixture.
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| CN107976254A (en) * | 2017-11-15 | 2018-05-01 | 中国科学院长春光学精密机械与物理研究所 | A kind of fiber spectrometer and multichannel optical fiber spectrometer device |
| CN109158771B (en) * | 2018-09-30 | 2021-06-11 | 广州新可激光设备有限公司 | Ultrahigh-speed laser cutting head and using method thereof |
| CN109158772B (en) * | 2018-09-30 | 2019-11-08 | 广州新可激光设备有限公司 | A kind of high-rate laser diced system and its cutting method based on multidimensional distribution control |
| CN111158140B (en) * | 2019-12-26 | 2022-03-08 | 哈尔滨新光光电科技股份有限公司 | Stray light analysis and suppression method for high-energy laser optical system and high-energy laser optical system |
| CN116625553B (en) * | 2023-07-19 | 2023-09-29 | 中国工程物理研究院应用电子学研究所 | Water absorption type full-absorption high-energy laser power energy measuring device and method |
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| JP3763785B2 (en) * | 2002-01-08 | 2006-04-05 | 新光電気工業株式会社 | Cap for semiconductor device, semiconductor device and manufacturing method thereof |
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| CN101704417A (en) * | 2009-12-04 | 2010-05-12 | 武汉华中天经光电系统有限公司 | Stray light suppression device for star tracker of spacecraft |
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