CN104793459B - For the laser time mark generator of high-speed photography - Google Patents
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- CN104793459B CN104793459B CN201510256267.1A CN201510256267A CN104793459B CN 104793459 B CN104793459 B CN 104793459B CN 201510256267 A CN201510256267 A CN 201510256267A CN 104793459 B CN104793459 B CN 104793459B
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Abstract
The invention discloses a kind of laser time mark generator for high-speed photography, belong to a kind of optical transient test corollary apparatus, laser time mark generator includes acousto-optic modulation component and signal optical transmission module；At least include continuous wave laser and acousto-optic modulator in acousto-optic modulation component, continuous wave laser is installed on base with acousto-optic modulator, at least include collector lens, optical fiber collimator and diffusing reflection target in signal optical transmission module, collector lens is connected by conducting optical fiber with the incidence end of optical fiber collimator, and optical fiber collimator is corresponding with diffusing reflection target；Coordinate the pulse laser for producing as timing signal (i.e. flashlight), safe, safe operation using continuous wave laser and acousto-optic modulator；And pulse laser is visually visible, before experiment can anticipation its work it is whether normal, can completely avoid timing signal from losing, reliability is high；The pulse laser frequency stabilization that acousto-optic modulation is produced, high precision improves timing signal precision.
Description
Technical field
The present invention relates to a kind of optical transient test corollary apparatus, in particular, it is used for the invention mainly relates to one kind
The laser time mark generator of high-speed photography.
Background technology
Time standard is the technical indicator of key in high-speed photography, and its precision is directly connected to captured by high-speed photography
Whether whether transient process initial time is accurate, especially in detonation physics research field, to be accurately related to the detonation moment, to examination
The interpretation for testing result serves vital effect.Along with the development of high speed photography, particularly high speed photography
Application with the joint diagnosis technology of other photoelectricity test technologies is more and more extensive, and the demand to high-speed photography time standard is more next
It is more universal, to the required precision of time standard also more and more higher.Time standard signal is obtained in high-speed photography at present mainly makes
It is the method for traditional markers detonator, its principle is when high-speed photography is carried out, using synchronizer trigger in fixed delay
Time trigger markers detonator and device is initiated, the two is detonated simultaneously, markers blasting cap detonation ionizes its ambient gas moment
Send high light, high-speed photography shoots the high light of the moment, by read that high light appears in High speed photography sequence which
Width demarcates the detonation moment, will the markers detonator high light that sends as timing signal, it goes out current moment and enters as time standard
Rower is determined.The time standard is specific as follows all in the presence of some flaws from acquisition methods to realization rate：One is to be using dangerous
, used as markers, security is poor, operational hazards for number detonator high；Two be detonator detonation stability it is not good, often result in timing signal
Lose；Three is that markers detonator can only produce pulsatile once signal, it is impossible to meet the demand that multiple timing signal is obtained；Four is markers
Detonator is ignited by high-voltage signal, higher to electromagnetic environment requirements, is easily disturbed by external condition.In view of it is above mentioned not
Foot, invent a kind of safe and reliable energy, high precision, strong robustness, when can meet multiple timing signal and obtaining the new pattern laser of demand
Mark signal generator, makes up the defect of existing markers acquisition methods, just seems increasingly important.
The content of the invention
An object of the present invention is for above-mentioned deficiency, there is provided a kind of laser timing signal hair for high-speed photography
Raw device, to expect to solve to there is blasting cap initiation in the way of detonator obtains time standard signal in high-speed photography in the prior art
Stability is not good, higher to electromagnetic environment requirements, it is impossible to meets multiple timing signal and obtains demand, operational hazards, security is poor
Etc. technical problem.
To solve above-mentioned technical problem, the present invention uses following technical scheme：
A kind of laser time mark generator for high-speed photography provided by the present invention, described laser timing signal
Generator includes acousto-optic modulation component and signal optical transmission module；In the acousto-optic modulation component at least include continuous wave laser with
Acousto-optic modulator, the continuous wave laser is installed on base with acousto-optic modulator, and the acousto-optic modulator is provided with acousto-optic
Crystal, the thang-kng optical axis of the acousto-optic crsytal and the continuous laser optical axis of continuous wave laser injection, in the horizontal direction in fixation
Prague angle；At least include collector lens, optical fiber collimator and diffusing reflection target in the signal optical transmission module, it is described poly-
Optical lens is connected by conducting optical fiber with the incidence end of optical fiber collimator, and the optical fiber collimator is relative with diffusing reflection target
Should, for making flashlight that diffusing reflection target is focused on from after exit end outgoing；The axle center of the collector lens and acousto-optic modulator
Flashlight axis after modulation coincides.
Preferably, further technical scheme is：Also include radio driver with letter in described acousto-optic modulation component
Number generator, the radio driver is arranged on base, the output end of the radio driver by output cable with it is described
The input of acousto-optic modulator is connected, and the input of the radio driver passes through input cable and the signal generator
Output end is connected.
Further technical scheme is：Described laser time mark generator also includes synchronizer trigger, described same
Step trigger accesses signal generator, for producing synchronous triggering signal trigger signal generator, signal hair by synchronizer trigger
Raw device produces modulated signal to be sent to radio driver, and radio driver drives acousto-optic modulator modulation continuous laser, and then produces
Raw flashlight.
Further technical scheme is：Collector lens in the signal optical transmission module is arranged on base, juxtaposition
In the front end of the acousto-optic modulator.
Further technical scheme is：Also include adapter flange, the conduction light in described signal optical transmission module
Fibre is connected after passing through adapter flange with the incidence end of optical fiber collimator.
Compared with prior art, part beneficial effect of the invention is：
1st, the pulse laser for producing is coordinated as timing signal (i.e. flashlight) using continuous wave laser and acousto-optic modulator,
It is safe, safe operation；And pulse laser is visually visible, before experiment can anticipation its work it is whether normal, when can avoid completely
Mark dropout, reliability is high；
2nd, pulse laser can produce the pulse signal of random waveform Strength Changes feature, can meet multiple timing signal and obtain
And the timing signal demand of more complicated experiment；
3rd, the pulse laser frequency stabilization that acousto-optic modulation is produced, high precision improves timing signal precision；
4th, using pulse laser as timing signal, Phototube Coupling is not dry by external condition to electromagnetic environment no requirement (NR)
Disturb, stability is strong；And fiber optic conduction laser signal is used, efficiency of transmission is high, and signal attenuation is small, can ultra-long span transmission signal.
Brief description of the drawings
Fig. 1 is the structural representation for illustrating one embodiment of the invention；
Fig. 2 is the structural representation for illustrating another embodiment of the present invention；
Fig. 3 is the structural representation for illustrating further embodiment of the present invention；
Fig. 4 is for illustrating the use of a preferred embodiment of the invention with reference to figure；
In figure, 1 is acousto-optic modulation component, 11 is continuous wave laser, 12 is acousto-optic modulator, 13 is base, 14 is radio frequency
Driver, 15 be signal generator, 2 be signal optical transmission module, 21 be collector lens, 22 be optical fiber collimator, 23 be unrestrained anti-
Shoot at the target, 24 for conduction optical fiber, 25 be adapter flange, 3 be synchronizer trigger, 4 be high-speed framing camera with rotating mirror.
Specific embodiment
The present invention is further elaborated below in conjunction with the accompanying drawings.
With reference to shown in Fig. 1, one embodiment of the present of invention is a kind of laser time mark generator for high-speed photography,
The laser time mark generator includes acousto-optic modulation component 1 and the two parts of signal optical transmission module 2；Wherein acousto-optic modulation group
At least include continuous wave laser 11 and acousto-optic modulator 12 in part 1, continuous wave laser 11 is installed in acousto-optic modulator 12
On base 13, the acousto-optic crsytal on adjustment acousto-optic modulator 12 projects the thang-kng optical axis of acousto-optic crsytal and continuous wave laser 11
Continuous laser optical axis, in the horizontal direction in fixed Prague angle；What is more important, foregoing signal optical transport group
At least need to include collector lens 21, optical fiber collimator 22 and diffusing reflection target 23 in part 2, wherein collector lens 21 is by conducting light
Fine 24 are connected with the incidence end of optical fiber collimator 22, while optical fiber collimator 22 is corresponding with diffusing reflection target 23, for making letter
Number light is focused on diffusing reflection target 23 from after exit end outgoing；On the basis of foregoing, for ensure modulation after signal luminous energy with
It is transmitted by conduction optical fiber 24, the axle center of foregoing collector lens 21 need to be with the flashlight axis after the modulation of acousto-optic modulator 12
Coincide.Go out as shown in Figure 1, the collector lens 21 in aforementioned signal optical transmission module is arranged on base 13, is placed in
The front end of the acousto-optic modulator 12.
In the present embodiment, the pulse laser for producing is coordinated as timing signal using continuous wave laser and acousto-optic modulator
(i.e. flashlight), safe, safe operation；And pulse laser is visually visible, before experiment can anticipation its work it is whether normal, can
Timing signal is avoided to lose completely, reliability is high；And the pulse laser frequency stabilization that acousto-optic modulation is produced, high precision is improved
Markers precision；Pulse laser is used as timing signal, Phototube Coupling, to electromagnetic environment no requirement (NR), not by extraneous bar simultaneously
Part is disturbed, and stability is strong；And fiber optic conduction laser signal is used, efficiency of transmission is high, and signal attenuation is small, can ultra-long span transmission letter
Number.
With reference to shown in Fig. 2, to make pulse laser to produce the pulse signal of random waveform Strength Changes feature, meet multiple
Timing signal is obtained and more complicated experiment timing signal demand；On the basis of inventor is also to above-described embodiment technical scheme
Improved, i.e., in another embodiment of the invention, specially set up in acousto-optic modulation component 1 radio driver 14 with
Signal generator 15, and radio driver 14 is arranged on base 13, by the output end of radio driver 14 by exporting electricity
Cable is connected with the input of the acousto-optic modulator 12, then by the input of radio driver 14 by input cable with it is described
The output end of signal generator 15 is connected.
Further, for the synchronous triggering performance of lifting device, it is easy to operation, goes out as shown in Figure 2, may be used also
Synchronizer trigger 3 is set up in laser time mark generator in the above-described embodiments, and the synchronizer trigger 3 is accessed into signal
Generator 15, for producing synchronous triggering signal trigger signal generator 15, signal generator 15 to produce tune by synchronizer trigger 3
Signal processed is sent to radio driver 14, and radio driver 14 drives the modulation continuous laser of acousto-optic modulator 12, and then produces letter
Number light.
As mentioned here above, it is the characteristics of laser time mark generator in the present embodiment：Use acousto-optic modulator
Modulation continuous wave laser generates the high-frequency pulsed lasers of stabilization as timing signal, and time precision is high；The form of pulse laser
Drive radio driver to be produced by acousto-optic modulator by signal generator, can be needed to modulate multi-signal according to experiment, and can
Meet multiple timing signal to obtain and more complicated experiment timing signal demand；Timing signal light is swashed using visually visible
Light, before experiment can anticipation its work it is whether normal, can completely avoid timing signal from losing, reliability is high；Using optical signal as
Timing signal, Phototube Coupling, to electromagnetic environment no requirement (NR), is not disturbed by external condition, and stability is strong；Use fiber optic conduction laser
Signal, efficiency of transmission is high, and signal attenuation is small, can ultra-long span transmission signal.
Based on the above embodiments of the present invention, inventor also found that optical fiber collimator 22 is due to distance in process of the test
It is initiated device near, it is i.e. destroyed after blast, and damaging after tens of rice optical fiber long is also exploded, obtained so as to increase
The consumption of experiment is taken, is the utilization rate of lifting conduction optical fiber 24；Inventor has also done further on the basis of above-described embodiment
Improvement, with reference to shown in Fig. 3, adapter flange 25 is specially set up in signal optical transmission module 2, by above-mentioned conduction optical fiber 24
It is connected with the tail optical fiber that carries of the incidence end of optical fiber collimator 22 by adapter flange 25.Consequently, it is possible to use adapter flange 25
Switching optical fiber collimator 22 is just destroyed after blast because it is from being initiated device close to, and tens of rice conduction optical fiber long
24 stand intact, and optical fiber collimator 22 can be changed in test next time and continue Reusability；
With reference to shown in Fig. 4, in Detonation Experiments test of the above-mentioned preferred one embodiment of present invention when actually used, by
In needing to obtain the correlation between burst time and the shooting time starting point of high-speed framing camera with rotating mirror 4, it is necessary to when carrying out
Between standard calibration；In order to obtain required timing signal, using above-mentioned laser time mark generator, it is used to produce laser markers
Signal is acquired in high-speed framing camera with rotating mirror 1.
Before test, between above-mentioned laser time mark generator and high-speed framing camera with rotating mirror 4 are placed in into explosion-proof test
In, it is initiated device and is placed on tens of meters of distant places outside the venue, produce fragment to destroy device with blast protection；Diffusing reflection target 23 is placed on
Outside the venue be initiated device adjacent, it is ensured that it is in the visual field of high-speed framing camera with rotating mirror 4 to obtain flashlight；Signal
Light is produced by continuous wave laser 11, and pulse light is modulated into through acousto-optic modulator 9, is focused on by collector lens 7, long from tens of rice
Conduction optical fiber 24 transmit and transferred through adapter flange 25, after finally being collimated by the optical fiber collimator 22 with tail optical fiber, flashlight light
Spot is radiated on diffusing reflection target 23, forms flashlight, then photographed by the tens of meters of high-speed framing camera with rotating mirror of distant place 4；
Conduction optical fiber 24 is not damaged by after priming device explodes by adapter flange 25, and then light can be changed in test next time
Fine collimater 3 continues Reusability；Foregoing diffusing reflection target 23 is to be clapped in different directions using diffusing reflection surface
Take the photograph its reflected light hot spot.
High-speed framing camera with rotating mirror 4 is to rotate to obtain superfast amplitude-frequency by the high speed of its tilting mirror, and rotary mirror type is at a high speed
Framing camera 4 starts and progressively reaches required rotating speed first, and exposure cycle is reached after stabilization of speed for T, is sent out to synchronizer trigger 3
Go out trigger signal, due to mechanical structure reason, itself rotating speed is not sufficiently stable, time drift is big, so rotary mirror type high speed framing phase
Machine 4 take pictures moment and synchronizer trigger 3 zero when relativeness it is unstable, need to be demarcated by timing signal.
During test, synchronizer trigger 3 after the trigger signal for getting high-speed framing camera with rotating mirror 4, in t0Moment is sent out
Go out first trigger signal triggering priming device, in a fixed delay t1Trigger signal generator 15 starts laser timing signal afterwards
Generator, priming device is in t0Latter fixed delay t of moment2After detonate, laser time mark generator is in t0+t1After moment
One fixed delay t3First pulsed optical signals is produced on diffusing reflection target 23 afterwards；t2Determined by initiation system own hardware, t3
Determined by laser time mark generator system own hardware, and t2、t3Gone out by oscillograph Accurate Calibration in advance before experiment；Markers
Signal is in t0+t1+t3Moment is lighted, and fixed delay t is controlled by synchronizer trigger 31Size, make t1+t3-t2≈ T, then in height
Timing signal appears in the n-th width therein in fast photography photo sequence, can determine that and is initiated device detonation moment t0+t2In tilting mirror
The of formula high-speed multi-frame camera 4In the width photo exposure period, wherein int is represented and rounded；And it is foregoing all
Between be spaced t when being all with the triggering zero of synchronizer trigger 30It is initial time benchmark, so as to by high-speed framing camera with rotating mirror 4
The t during triggering zero of shooting moment and synchronizer trigger 30Associate, complete the time standard mark of high-speed framing camera with rotating mirror 4
It is fixed.
Than that described above, in addition it is also necessary to which explanation is " one embodiment ", " another implementation spoken of in this manual
Example ", " embodiment " etc., specific features, structure or the feature for referring to being described with reference to the embodiment are included in the application summary
Property description at least one embodiment in.It is not necessarily to refer to same reality that statement of the same race occur in multiple places in the description
Apply example.Furthermore, it is understood that when describing specific features, structure or a feature with reference to any embodiment, what is advocated is knot
Other embodiment is closed also to fall within the scope of the present invention realizing this feature, structure or feature.
Although reference be made herein to invention has been described for multiple explanatory embodiments of the invention, however, it is to be understood that
Those skilled in the art can be designed that a lot of other modification and implementation methods, and these modifications and implementation method will fall in this Shen
Please be within disclosed spirit and spirit.More specifically, in the range of disclosure, drawings and claims, can
Various variations and modifications are carried out with the building block to theme composite configuration and/or layout.Except to building block and/or layout
Outside the variations and modifications for carrying out, to those skilled in the art, other purposes also will be apparent.
Claims (4)
1. a kind of laser time mark generator for high-speed photography, it is characterised in that：Described laser timing signal occurs
Device includes acousto-optic modulation component (1) and signal optical transmission module (2)；
At least include continuous wave laser (11) and acousto-optic modulator (12), the continuous laser in the acousto-optic modulation component (1)
Device (11) is installed on base (13) with acousto-optic modulator (12), and the acousto-optic modulator (12) is provided with acousto-optic crsytal, institute
The continuous laser optical axis that the thang-kng optical axis of acousto-optic crsytal is projected with continuous wave laser (11) is stated, in the horizontal direction in fixed cloth
Glug angle；
At least include collector lens (21), optical fiber collimator (22) and diffusing reflection target (23) in the signal optical transmission module (2),
The collector lens (21) is connected by conducting optical fiber (24) with the incidence end of optical fiber collimator (22), and the fiber optic collimator
Device (22) is corresponding with diffusing reflection target (23)；Signal behind the axle center of the collector lens (21) and acousto-optic modulator (12) modulation
Light axis coincides；
Also include adapter flange (25) in described signal optical transmission module (2), it is described to conduct optical fiber (24) through adapter flange
(25) incidence end afterwards with optical fiber collimator (22) is connected.
2. the laser time mark generator for high-speed photography according to claim 1, it is characterised in that：Described sound
Also include radio driver (14) and signal generator (15) in Light modulation element (1), the radio driver (14) is arranged on
On base (13), the output end of the radio driver (14) passes through the input of output cable and the acousto-optic modulator (12)
It is connected, the input of the radio driver (14) is connected by input cable with the output end of the signal generator (15)
Connect.
3. the laser time mark generator for high-speed photography according to claim 2, it is characterised in that：Described swashs
Light time mark generator also includes synchronizer trigger (3), and the synchronizer trigger (3) is accessed signal generator (15), is used for
Synchronous triggering signal trigger signal generator (15), signal generator (15) is produced to produce modulated signal by synchronizer trigger (3)
Radio driver (14) is sent to, radio driver (14) drives acousto-optic modulator (12) modulation continuous laser, and then produces letter
Number light.
4. the laser time mark generator for high-speed photography according to claim 1, it is characterised in that：The signal
Collector lens (21) in optical transmission module is placed in the front end of the acousto-optic modulator (12) on base (13).
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102564481A (en) * | 2012-01-11 | 2012-07-11 | 中国科学院上海光学精密机械研究所 | Method and device for improving signal-to-noise ratio of distributed optical fiber Brillouin sensor |
| CN102607717A (en) * | 2012-02-24 | 2012-07-25 | 桂林电子科技大学 | Coherent detection system and method for homologous common beam of laser |
| CN103234917A (en) * | 2013-04-08 | 2013-08-07 | 中国工程物理研究院流体物理研究所 | Real-time measuring system for impact temperature and spectral emissivity |
| CN103811989A (en) * | 2014-01-24 | 2014-05-21 | 深圳市创鑫激光技术有限公司 | Optical fiber coupling acousto-optic Q switch for high power pulse fiber laser |
| CN104600555A (en) * | 2015-01-21 | 2015-05-06 | 中国航空工业集团公司北京长城计量测试技术研究所 | Method and device for selecting dynamic acousto-optic modulation optical frequency orders |
| CN204631440U (en) * | 2015-05-19 | 2015-09-09 | 中国工程物理研究院流体物理研究所 | For the laser time mark generator of high-speed photography |
-
2015
- 2015-05-19 CN CN201510256267.1A patent/CN104793459B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102564481A (en) * | 2012-01-11 | 2012-07-11 | 中国科学院上海光学精密机械研究所 | Method and device for improving signal-to-noise ratio of distributed optical fiber Brillouin sensor |
| CN102607717A (en) * | 2012-02-24 | 2012-07-25 | 桂林电子科技大学 | Coherent detection system and method for homologous common beam of laser |
| CN103234917A (en) * | 2013-04-08 | 2013-08-07 | 中国工程物理研究院流体物理研究所 | Real-time measuring system for impact temperature and spectral emissivity |
| CN103811989A (en) * | 2014-01-24 | 2014-05-21 | 深圳市创鑫激光技术有限公司 | Optical fiber coupling acousto-optic Q switch for high power pulse fiber laser |
| CN104600555A (en) * | 2015-01-21 | 2015-05-06 | 中国航空工业集团公司北京长城计量测试技术研究所 | Method and device for selecting dynamic acousto-optic modulation optical frequency orders |
| CN204631440U (en) * | 2015-05-19 | 2015-09-09 | 中国工程物理研究院流体物理研究所 | For the laser time mark generator of high-speed photography |
Non-Patent Citations (1)
| Title |
|---|
| 用于冲击波和爆轰物理实验中的声光开关;刘乔等;《***与冲击》;20090131;第29卷(第1期);第46页第1-4段 * |
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