CN102735650B - Particle field transient multi-picture holography device and method - Google Patents
Particle field transient multi-picture holography device and method Download PDFInfo
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- CN102735650B CN102735650B CN201210240017.5A CN201210240017A CN102735650B CN 102735650 B CN102735650 B CN 102735650B CN 201210240017 A CN201210240017 A CN 201210240017A CN 102735650 B CN102735650 B CN 102735650B
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Abstract
The invention relates to the field of holography, particularly a particle field transient multi-picture holography device and a particle field transient multi-picture holography method. Aiming at the situation that multi-picture continuous particle field transient holography cannot be carried out in the prior art, the invention provides the particle field transient multi-picture holography device and the particle field transient multi-picture holography method based on a photo-induced polymer. The device comprises a coherent light generating device, an object light regulating device, a reference light regulating device, a synchronization control device, a holographic plate and the like. The method provided by the invention comprises the following steps that the synchronization control device is used to detect the particle field and send signals to the coherent light generating device and a light beam deflection device; the coherent light generating device generates two paths of coherent light according to the signals; one path of the coherent light forms the object light with the particle field information through the object light regulating device; the other path of coherent light forms the reference light through the reference light regulating device; the object light and the reference light form interference fringe on the holographic plate to be recorded by a photo-induced holographic plate. The device can be applied to the field of holography.
Description
Technical field
The present invention relates to holograph field, especially relate to a kind of particle field transient multi-picture holography device and method
.
Background technology
Holography is taken for the single width of Particle Field and fluid field already, and for tremendous contribution has been made in these fields.Its noncontact, Large visual angle, the large feature such as the depth of field and 3-d reproduction make it have unique advantage at Particle Field diagnostic field.Adopt holography to carry out detection to Particle Field generally include record, development and reproduce three links.Record mainly refers to that two light beams that the same pulse of pulse laser separates cause the photochemical reaction (exposure) of holographic dry plate at the interference field that recording medium (holographic dry plate) surface is formed, holographic dry plate after exposure have recorded the intensity distributions of interference field, a branch of information with Particle Field (object light) in this two-beam, another bundle is not with the information of the particles field (reference light).Development is mainly directed to silver halide emulsion, dichromated gelatin, this three classes material of photoresist, and developing process makes that photochemically reactive part does not occur and washed, and makes to there occurs photochemically reactive part and remains.Reproduce the angular illumination referring to when adopting the reference light in above-mentioned two-beam record develop after holographic dry plate, thus make object light out reproduced with the form of diffraction light.Utilize the method can reappear the distributed in three dimensions of a certain moment Particle Field.
If need record Particle Field evolutionary process in time just to need the transient recording of several holograms.A kind of way places multiple holographic dry plates side by side, places hypervelocity shutter these holographic dry plates are not being exposed in the same time in reference light corresponding to each dry plate and object light light path.The method makes each holographic dry plate have different visual angles, there is the deviation of field of view angle between each light field therefore reproducing out, is unfavorable for reproducing observing.In the method, each holographic dry plate all needs a set of corresponding light path element, and therefore when holographic dry plate quantity rises, pen recorder is very complicated by what become, is not easy to debugging and safeguards and involve great expense.
Another kind of way is that holographic dry plate is made optical disc shapes, makes holographic dry plate do High Rotation Speed with the normal crossing cd centre for axle, reasonably adjusts rotational speed and exposure area each time just can be made different.Because high-speed electric expreess locomotive common at present can only reach several ten thousand rpms, therefore by complete for whole video disc recording required time in millisecond magnitude.This parameter limits the further raising of temporal resolution in interference region constant area and under the constant condition of disc size.The method requires the precise match between rotational speed and pulse laser frequency, the difficulty that this precise match becomes when High Rotation Speed.The method also can, due to the rotation of CD, make the hologram be recorded to occur dynamic fuzzy.
With the holographic dry plate that photopolymer material is recording medium, its recording medium thickness can reach hundreds of micron and even thicker, and be called as volume hologram with the hologram of its record, volume hologram has obvious angle selective properties.Utilize the angle selective properties of volume hologram, can at same several holograms of volumetric region record of recording medium, and each width hologram can be reproduced respectively.Several holographic recording technology of one based on volume hologram angle selective properties are called as angle multiplexing technique, and this technology is widely used in high density data stores.
Summary of the invention
Technical matters to be solved by this invention is: for the problem that in above-mentioned existing several holographic technologies of Particle Field transient state, light path adjustment is difficult, temporal resolution is low, propose a kind of particle field transient multi-picture holography device based on photopolymer and method.The present invention appears at the detection of observation area moment by isochronous controller to Particle Field, to transmit control signal the two-way coherent light that coherent light generation device is produced to coherent light generation device and acoustooptic deflector, wherein a road coherent light irradiates through object light regulating device on holographic dry plate with the information of the particles field, another road coherent light makes to produce not through reference light regulating device the reference light of irradiation on holographic dry plate that angle is different in the same time, on holographic dry plate, object light and reference light are formed and interfere, achieve several holographs of high time resolution transient state under simple optical travel permit part, in addition, also by arranging the second biography as device 11 for passing near picture to holographic dry plate 12 image of Particle Field to improve the record effect of holographic dry plate 12.In addition also by arranging the second polarization state regulating device 14 for regulating the polarization state of another bundle coherent light exported through beam splitter device, and then make the coherent light through the second polarization state regulating device 14 have identical polarization state with a branch of coherent light through collimator and extender device 4, in addition also to produce the polarization state of pulse signal for adjusting laser instrument 1 by arranging the first polarization state regulating device 2, when beam splitter device 3 be Glan prism or polarization splitting prism time the first polarization state regulating device 2 can be used for the power ratio of two-beam that regulates beam splitter device 3 to separate, in addition, also produce the spot diameter of laser facula by arranging the 3rd beam-expanding collimation device 15 in advance amplify laser 1, and then protection beam splitter device 3 can not be damaged by high-power laser pulse, in addition by arranging optical delay device 16 for regulating the phase place of the road coherent light produced through beam splitter device 3, make the two bundle coherent light phase places through beam splitter device generation consistent, ensure that the object light of final formation and reference light can produce interference fringe.
The technical solution used in the present invention is as follows:
A kind of particle field transient multi-picture holography device comprises coherent light generation device, object light regulating device, reference light regulating device, sync control device 13, holographic dry plate 12, coherent light generation device, for receiving the trigger pip of sync control device 13 and producing laser pulse and be divided into two bundle coherent lights; Object light regulating device, for being produced by coherent light generation device two restraint a branch of introducing observation area 9 in coherent lights, and be observation area 9 and provide back lighting, this Shu Guang becomes object light behind observation area 9; Sync control device 13, for providing control signal to coherent light generation device, reference light regulating device respectively; Reference light regulating device, angle and the polarization state of another bundle coherent light produced for regulating coherent light generation device form reference light, and the object light that object light regulating device is regulated and reference light are formed interferes; Holographic dry plate 12, for recording the interference fringe of object light and reference light formation.
Described coherent light generation device comprises laser instrument 1, produces laser pulse for the trigger pip exported according to sync control device 13; Beam splitter device 3(Glan prism or polarization spectroscope), pulse signal for being produced by laser instrument 1 is divided into two bundle coherent lights and is input to object light regulating device, reference light regulating device respectively, and it is 1:2 ~ 1:30 that beam splitter device 3 is input to another road luminous power ratio that a road light of object light regulating device and beam splitter device 3 be input to reference light regulating device.
Described object light regulating device comprises the first beam-expanding collimation device 4, and amplify for the road coherent light spot diameter produced by interference light generation device, its enlargement factor is 10 ~ 40 times; Second catoptron 8, for the object light of the first beam-expanding collimation device 4 is reflexed to observation area 9, is formed with object being observed information in observation area 9 and the object light of irradiating in holographic dry plate.
Described object light regulating device also comprises the second biography as device 11, described second biography is positioned between observation area 9 and holographic dry plate as device 11, for being delivered to holographic dry plate 12 by forming the object light of object being observed information in observation area 9 through observation area 9, second biography comprises the 3rd lens, the 4th lens two lens as device 11, described 3rd lens, the 4th saturating focal length are equal, and the described second distance passed as device 11 and holographic dry plate 12 passes the long 5mm ~ 30mm of back focal length as device 11 or short 5mm ~ 30mm than described second.
Described reference light regulating device comprises the first catoptron 5, the angle of another road coherent light produced for regulating beam splitter device 3; Acoustooptic deflector 6, the control signal for exporting according to sync control device 13 produces controlled frequency and makes to deflect through the coherent light of acoustooptic deflector 6, and acoustooptic deflector 6 range of deflection is 0 ~ 3.2 °; Second beam-expanding collimation device 7, for being amplified by the coherent light spot diameter that angular deflection occurs through acoustooptic deflector 6, it is 1:2 ~ 5:1 that the first beam-expanding collimation device 4 and the second beam-expanding collimation device 7 expand ratio; First passes as device 10, for the coherent light amplified through beam-expanding collimation device 7 is reached holographic dry plate 12, first biography comprises the first lens, the second lens two lens as device 10, described first lens, the second saturating focal length are equal, first biography equals to pass the front focal length as device 10 apart from the distance of acoustooptic deflector 6 as device 10, and the first biography equals to pass the back focal length as device 10 apart from the distance of holographic dry plate 12 as device 10; When wherein reference light does not deflect and the angle of object light be 10 ° ~ 30 °, the angle of object light and photo-induced polymer holographic dry plate normal is 10 ° ~ 30 °.
Described sync control device 13 comprises Electro-Optical Sensor Set 17, for the appearance of Particle Field being detected before entering observation area 9 in Particle Field, and exports detectable signal to digital delay device 19 simultaneously; Digital delay device 19, for receive Electro-Optical Sensor Set detectable signal after, after the delay time of setting, give laser instrument 1 and send trigger pip to single-chip microcomputer 18; Single-chip microcomputer 18, for after the trigger pip that digital delay device 19 sends being detected, changes the outputting drive voltage frequency of acoustooptic deflector power supply 20 according to the time interval of setting; Acoustooptic deflector power supply 20, for controlling the deflection angle of acoustooptic deflector 6 after the driving voltage frequency control signal receiving single-chip microcomputer 18 output.
A kind of particle field transient multi-picture holography device, also comprise the first polarization state regulating device 2, at least one optical delay device 16, the 3rd beam-expanding collimation device 15, described first polarization state regulating device 2 is half-wave plate, compensator, polaroid or Faraday polarization apparatus, produces the polarization state of pulse signal for adjusting laser instrument 1; 3rd beam-expanding collimation device 15, the spot diameter for the pulse signal launched by laser instrument 1 enters amplification, reduces pulse laser because high power is to the damage of beam splitter device 3; Optical delay device 16, for regulating the phase place of the road coherent light produced through beam splitter device 3, make the two bundle coherent light phase places through beam splitter device 3 generation consistent, described optical delay device 16 comprises the 3rd catoptron 21, for carrying out 90 ° of deflections to the road coherent light produced through beam splitter device 3; Right-angle prism 23, for carrying out 180 ° of deflections to the coherent light through the 3rd catoptron 21; 4th catoptron 22, for carrying out the deflection of 90 ° to the coherent light through right-angle prism 23.
When beam splitter device 3 is Glan prisms, described reference light regulating device also comprises the second polarization state regulating device 14, for regulating the polarization state of another road coherent light through beam splitter device 3 output, make the road coherent light through the second polarization state regulating device 14 have identical polarization state with the road coherent light through collimator and extender device 4, described second polarization state regulating device 14 comprises half-wave plate, polaroid, compensator or Faraday polarization apparatus.
A kind of several stereolithography process of Particle Field transient state comprise
Step one: sync control device 13 detects the moment that Particle Field appears at observation area 9, and trigger pip is to coherent light generation device, transmits control signal to acoustooptic deflector 6;
Step 2: coherent light generation device detects the trigger pip of sync control device 13, produce two-way coherent light, wherein a road coherent light is formed with the information of the particles field and irradiates the object light on holographic dry plate after object light regulating device, another road coherent light forms not the reference light of irradiation on holographic dry plate of different angles deflection in the same time through reference light regulating device, object light and reference light are formed at holographic dry plate interferes, and carries out record exposure.
A kind of several stereolithography process of Particle Field transient state, described sync control device 13 comprises photodetector 17, digital delay device 19, single-chip microcomputer 18, acoustooptic deflector power supply 20; Described coherent light generation device comprises laser instrument 1, beam splitter device 3; Object light regulating device comprises the first beam-expanding collimation device 4, second catoptron 8; Reference light regulating device comprises the first catoptron 5, acoustooptic deflector 6, second beam-expanding collimation device 7, first passes as device 10, specifically comprises step:
Step one: appearance Particle Field being detected by photoelectric detector 17 in sync control device 13 before particle enters observation area 9, and send detectable signal to digital delay device simultaneously;
Step 2: when digital delay device 19 detects detectable signal, sends trigger pip to laser instrument 1 and single-chip microcomputer 18 after the time delays of setting;
Step 3: after single-chip microcomputer 18 detects the trigger pip that digital delay device 19 sends, changes the outputting drive voltage frequency of acoustooptic deflector power supply 20, and then controls acoustooptic deflector deflection angle according to the time interval of setting;
Step 4: laser instrument 1 detects the trigger pip of digital delay device 19, produces laser pulse;
Step 5: the laser pulse that laser instrument 1 produces is divided into two-way coherent light through beam splitter device 3, wherein a road coherent light forms object light through object light regulating device, the wherein first-selected adjustment needing at least one employing optical delay device 16 to carry out a phase, observation area 9 is adjusted to again through the second catoptron 8, now when Particle Field enters observation area 9, the coherent light reflected through the second catoptron 8 is right through observation area 9 and carry the information of the particles field on holographic dry plate 12, define object light with the information of the particles field.
Step 6: the laser pulse that laser instrument 1 produces is divided into two-way coherent light through beam splitter device 3, wherein another road coherent light regulates through acoustooptic deflector 6 after the first catoptron 5 again, because acoustooptic deflector 6 is under beam deflecting device power supply 20 different frequency controls, produce the reference light of different angles deflection, the reference light of different angles deflection does not in the same time irradiate on holographic dry plate 12, form the interference fringe of not different pattern in the same time from the object light formed before, namely define Particle Field not several holograms in the same time.
In sum, owing to have employed technique scheme, the invention has the beneficial effects as follows:
1) by object light regulating device, reference light regulating device, sync control device coherent light generation device and holographic dry plate, when sync control device 13 detected the appearance of Particle Field before particle enters observation area 9, and send trigger pip to coherent light generation device, transmit control signal to acoustooptic deflector 6; Coherent light generation device detects the trigger pip of sync control device 13, produce two-way coherent light, wherein a road coherent light is formed with the information of the particles field and irradiates the object light on holographic dry plate after object light regulating device, another road coherent light forms not the reference light of irradiation on holographic dry plate of different angles deflection in the same time through reference light regulating device, object light and reference light are formed in holographic dry plate interferes, and carries out record exposure.Realize several holographs of the transient state of Particle Field in observation area 9, compensate for several deficiencies that holograph temporal resolution is low and light path is complicated of prior art transient state.
2) by arranging the second biography as device 11 for passing near picture to holographic dry plate 12 image of Particle Field to improve the record effect of holographic dry plate 12.
3) by arranging the second polarization state regulating device 14 for regulating the polarization state of another bundle coherent light exported through beam splitter device, and then make the coherent light through the second polarization state regulating device 14 have identical polarization state with a branch of coherent light through collimator and extender device 4, thus ensure that object light and reference light can interfere.
4) to produce the polarization state of pulse signal for adjusting laser instrument 1 by arranging the first polarization state regulating device 2, and then can match with the beam splitter device 3 that have employed Glan prism or polarization splitting prism, make beam splitter device 3 get two-beam power ratio be easy to regulate.
5) by arranging the 3rd beam-expanding collimation device 15 for shifting to an earlier date the spot diameter of amplify laser 1 output laser pulse, and then beam splitter device 3 is avoided to damage because of the high power of pulse laser.
6) making the phase adjusted of the road coherent light produced through beam splitter device 3 become simple by arranging optical delay device 16, ensureing that the object light of final formation and reference light can produce interference fringe.
Accompanying drawing explanation
examples of the present invention will be described by way of reference to the accompanying drawings, wherein:
Fig. 1 is the embodiment of the present invention one particle field transient multi-picture holography device schematic diagram;
Fig. 2 is embodiment of the present invention two devices schematic diagram;
Fig. 3 is embodiment one or embodiment two sync control device schematic diagram;
Fig. 4 is optical delay device schematic diagram.
In figure
1-laser instrument 2-first polarization state regulating device 3-beam splitter device
4-first beam-expanding collimation device 5-first catoptron 6-acoustooptic deflector
7-second beam-expanding collimation device 8-second catoptron 9-observation area
10-first passes and passes as device 12-holographic dry plate as device 11-second
13-sync control device 14-second polarization state regulating device 15-the 3rd beam-expanding collimation device
16-optical delay device 17-Electro-Optical Sensor Set 18-single-chip microcomputer
19-digital delay device 20-acoustooptic deflector power supply 21-the 3rd catoptron
22-the 4th catoptron 23-right-angle prism.
Embodiment
All features disclosed in this instructions, or the step in disclosed all methods or process, except mutually exclusive feature and/or step, all can combine by any way.
Arbitrary feature disclosed in this instructions (comprising any accessory claim, summary and accompanying drawing), unless specifically stated otherwise, all can be replaced by other equivalences or the alternative features with similar object.That is, unless specifically stated otherwise, each feature is an example in a series of equivalence or similar characteristics.
One, this paper related description
1. the design's recording process just defines hologram after terminating, and does not need to develop in darkroom, and only need place a period of time under incoherent white light source (as incandescent lamp, sunshine etc.), " reproduction " process is consistent with prior art;
2. laser instrument 1 is pulsed laser, and the optical maser wavelength of generation is 532nm, and the pulsewidth of laser pulse should be less than for 10 nanoseconds, and single pulse energy is preferably higher than 20 millijoules, and facular model is preferably single longitudinal mode, and polarization state is linear polarization, and repetition frequency should be greater than 100KHz;
3. the first beam-expanding collimation device 4 and the second beam-expanding collimation device 7 expand ratio is 1:2 to 5:1; Wherein expand than finger spot diameter enlargement factor;
4. the shorter coherent length of optical path difference much smaller than pulsed laser needing optical delay device 16 to make object light and reference light of the coherent length of pulsed laser, wherein coherent length is the performance parameter of laser instrument, and the unit of this parameter is long measure (as: rice, millimeter etc.).Light path propagates into from A point the distance that the time chien shih light needed for B point propagates in a vacuum for light, and unit is similarly long measure.And optical path difference refers to two-beam, and along different path from A, point is to the difference of the light path of B point, unit is still long measure;
5. the relation of acoustooptic deflector 6 and acoustooptic deflector power supply 20: acoustooptic deflector power supply 20 can provide different driving frequencies, different driving frequencies can cause acoustooptic deflector 6 to cause the deflection of different angles to the light by it, just can change deflection angle by changing driving frequency, the maximum deflection angle that can cause is called range of deflection.Voltage-controlled oscillator and digital frequency synthesizer two kinds can be chosen respectively according to the different acoustooptic deflector power supplys of control mode;
6. Particle Field and the relation between observation area 9 and sync control device 13: Particle Field often results from high-speed impact process, therefore Particle Field also has very high movement velocity, it is extremely important that so high speed judges when Particle Field enters observation area, and sync control device 13 can complete this judgement work;
7. first pass and comprise the first lens, the second lens two lens as device 10, described first lens, the second saturating focal length are equal.Second biography comprises the 3rd lens, the 4th lens as device 11, and described 3rd lens, the 4th focal length of lens are also equal.In device 11 two lens focal length can not with first pass as the focal length of lens in device 10 equal;
8. first pass as device 10, for the coherent light amplified through beam-expanding collimation device 7 is reached holographic dry plate 12, first biography equals the front focal length of the first biography as device 10 as device 10 apart from the distance of acoustooptic deflector rear surface, front focal length specific explanations first lens is positioned at the second beam-expanding collimation device 7 side, second lens is positioned at holographic dry plate side, and front focal length now refers to the focal length being positioned at the second beam-expanding collimation device side first lens; First biography equals to pass the back focal length as device 10 apart from the distance of holographic dry plate 12 as device 10, back focal length specific explanations is that first lens is positioned at the second beam-expanding collimation device 7 side, second lens is positioned at holographic dry plate side, and back focal length now refers to the focal length being positioned at holographic dry plate side second lens; Second passes as device 11 for being delivered to holographic dry plate 12 by forming the object light of object being observed information in observation area 9 through observation area 9, described second biography equals the front focal length of the second biography as device 11 as device 11 and the distance being observed regional center, front focal length specific explanations the 3rd lens are positioned at side, observation area 9,4th lens are positioned at holographic dry plate side, and front focal length now refers to the focal length being positioned at side, observation area 9 the 3rd lens; Second distance passed as device 11 and holographic dry plate 12 passes the long 5mm ~ 30mm of back focal length as device 11 or short 5mm ~ 30mm than described second, wherein back focal length specific explanations is: the second biography is positioned at side, observation area 9 as device 11 the 3rd lens, 4th lens are positioned at holographic dry plate side, and its back focal length refers to the focal length being positioned at holographic dry plate side the 4th lens;
9. holographic dry plate 12 adopts its recording medium thickness of photo-induced polymer holographic dry plate to be 300
μm.Photo-induced polymer holographic dry plate has the ability recording several holograms in same volume, and this ability can be several holographs of transient state and provides a realization means.Its thickness can control.The detailed manufacturing process of photo-induced polymer holographic dry plate 12 is shown in patent (200410066746.9), difference is that its photosensitizer is adjusted to eosin W or W S, optimum formula ratio is also different from this patent, and its optimum formula ratio and experimental data are shown in document (magazine name: Chinese laser; Reel number: 36 (4): 983-988.Author: Duan Xiaoya, Zhu Jianhua, Wei Tao, Chen Qianqian, Wei Naike; Title: the formulation optimization of green quick polyvinyl alcohol (PVA)/acrylamide system photopolymer and holographic memory characteristic, wherein part 2 provides formula rate, and the 3rd part provides experimental data).When recording, there is high sensitivity in order to make this photo-induced polymer holographic dry plate (12) and first can carry out pre-exposure (placing a period of time under incoherent 532nm light source) to holographic dry plate, the time of pre-exposure can be different according to dry plate thickness and the intensity of light source that pre-exposure uses, and can repeatedly measure the best pre-exposure time in laboratory conditions;
10. single-chip microcomputer 18, after the trigger pip that digital delay device 19 sends being detected, changes the outputting drive voltage value frequency of acoustooptic deflector power supply 20 according to the time interval of setting; Be that the acoustooptic deflector power supply of driving power can receive external control signal (being transmitted by USB or RS232) with digital frequency synthesizer, and then change output or the driving frequency of driving power, therefore single-chip microcomputer only need send a control signal to after the time interval of setting acoustooptic deflector power supply, the function that will realize due to single chip part is simple, and common single-chip microcomputer (as: STC single-chip microcomputer, PIC single chip microcomputer, AVR single chip, EMC single-chip microcomputer and other like product) can realize this function.If the repetition frequency of laser instrument is f, then time interval T is provided by (1) formula
(1)
11. digital delay devices 19, for receiving the detectable signal of Electro-Optical Sensor Set and send trigger pip to laser instrument (1) and to single-chip microcomputer (18) after delay time, delay function needed for digital delay device can be realized by DG535 or other like product; What the detecting location of Electro-Optical Sensor Set was positioned at that Particle Field enters observation area must through position, and the movement velocity of Particle Field is v, and the detecting location of Electro-Optical Sensor Set is S apart from observation area distance
1, laser enters 9 processes in observation area total optical path (can be similar to by the length of reality) from being issued to is S
2, laser instrument is t from receiving trigger pip to the response time sending laser
1second, the time that the detectable signal of Electro-Optical Sensor Set passes to digital delay device 19 to be needed is t
2second, the time that trigger pip passes to laser instrument 1 needs from digital delay device 19 is t
3second, the light velocity is c, then delay time τ is provided by (2) formula:
(2).
Two, principle of work: this device detects Particle Field when observation area 9 occurs, simultaneously beam of laser is carried the information of the particles field become object light by observation area 9, and formed on holographic dry plate with the reference light after regulating and interfere, and record by holographic dry plate 12 interference fringe that reference light formed with the object light of carrying the information of the particles field.Realize Particle Field several holographs of transient state in observation area 9, compensate for several deficiencies that holograph temporal resolution is low and light path is complicated of prior art transient state.
Three, particle field transient multi-picture holography device:
Embodiment one, this device comprises coherent light generation device, object light regulating device, reference light regulating device, sync control device 13, holographic dry plate 12.Coherent light generation device is for receiving the trigger pip of sync control device 13 and producing laser pulse and be divided into two bundle coherent lights; Object light regulating device is used for a branch of introducing observation area 9 in the two bundle coherent lights produced by coherent light generation device, and be observation area 9 and provide back lighting, this Shu Guang becomes object light behind observation area 9; Sync control device 13 is for providing control signal to coherent light generation device, reference light regulating device respectively; Reference light regulating device restraints angle and the polarization state formation reference light of coherent light for another regulating coherent light generation device to produce, and the object light that object light regulating device is regulated and reference light can be interfered; Holographic dry plate 12 is for recording the interference fringe of object light and reference light formation.
Embodiment two, on embodiment one basis, described coherent light generation device comprises laser instrument 1, beam splitter device 3.Laser instrument 1, produces laser pulse for the control signal exported according to sync control device 13; Beam splitter device 3, pulse signal for being produced by laser instrument 1 is divided into two bundle coherent lights and is input to object light regulating device, reference light regulating device respectively, and wherein beam splitter device 3 is input to another road luminous power ratio that a road light of object light regulating device and beam splitter device 3 be input to reference light regulating device is 1:2 ~ 1:30.
Preferably, beam splitter device 3 is input to another road luminous power ratio that a road light of object light regulating device and beam splitter device 3 be input to reference light regulating device is 1:4.
Embodiment three, on embodiment one or two basis, object light regulating device comprises the first beam-expanding collimation device 4, second catoptron 8, and wherein the first beam-expanding collimation device 4 amplifies for the road coherent light spot diameter produced by interference light generation device; Second catoptron 8, for the object light of the first beam-expanding collimation device 4 is reflexed to observation area 9, is formed with object being observed information in observation area 9 and the object light of irradiating in holographic dry plate.
Preferably, the first beam-expanding collimation device 4 enlargement factor is 10 ~ 40 times.
Embodiment four, on embodiment three basis, object light regulating device also comprises the second biography as device 11, described second biography is positioned between observation area 9 and holographic dry plate as device 11, for being delivered to holographic dry plate 12 by forming the object light of object being observed information in observation area 9 through observation area 9, the described second distance passed as device 11 and holographic dry plate 12 passes the long 5mm ~ 30mm of back focal length as device 11 or short 5mm ~ 30mm than described second.
Preferably, the second distance passed as device 11 and holographic dry plate 12 passes the short 5mm ~ 30mm of back focal length as device 11 than described second.
Embodiment five, on embodiment one or four basis, reference light regulating device comprises the first catoptron 5, acoustooptic deflector 6, second beam-expanding collimation device 7, first passes as device 10, and wherein the first catoptron 5 is for the angle of another road coherent light of regulating beam splitter device 3 to produce; Acoustooptic deflector 6 produces controlled frequency for the control signal exported according to sync control device 13 and makes to deflect through the coherent light of acoustooptic deflector 6, and acoustooptic deflector 6 range of deflection is 0 ~ 3.2 °; Second beam-expanding collimation device 7 is for amplifying the coherent light spot diameter that angular deflection occurs through acoustooptic deflector 6, and it is 1:2 ~ 5:1 that the first beam-expanding collimation device 4 and the second beam-expanding collimation device 7 expand ratio; First passes as device 10 for the coherent light amplified through beam-expanding collimation device 7 is reached holographic dry plate 12, and the first biography equals to pass the back focal length as device 10 apart from the distance of holographic dry plate 12 as device 10; When wherein reference light does not deflect and the angle of object light be 10 ° ~ 30 °, the angle of object light and photo-induced polymer holographic dry plate normal is 10 ° ~ 30 °.
Preferably, the angle of object light and photo-induced polymer holographic dry plate normal is 20 °, when reference light does not deflect and the angle of object light be 20 °, and object light and reference light are in the same side of holographic dry plate normal.
Preferably, the first beam-expanding collimation device 4 and the second beam-expanding collimation device 7 expand ratio is 1:2.
Embodiment six, on embodiment one or five basis, sync control device 13 comprises photodetector 17, for the appearance of Particle Field being detected before entering observation area 9 in Particle Field, and exports detectable signal to digital delay device 19 simultaneously; Digital delay device 19, for receiving the detectable signal of Electro-Optical Sensor Set and send trigger pip to laser instrument 1 and to single-chip microcomputer 18 after the delay time of setting; Single-chip microcomputer 18, for after the trigger pip that digital delay device 19 sends being detected, changes the outputting drive voltage frequency of acoustooptic deflector power supply 20 according to the time interval of setting; Acoustooptic deflector power supply 20, for controlling the deflection angle of acoustooptic deflector after the driving voltage frequency control signal receiving single-chip microcomputer 18 output.
Embodiment seven, as shown in Figure 1, on embodiment one or six basis, this device also comprises polarization state regulating device 2, and polarization state regulating device 2 is half-wave plate or polaroid or Faraday polarization apparatus, produces the polarization state of laser pulse for adjusting laser instrument 1.
Embodiment eight, on embodiment one or seven basis, this device also comprises the 3rd beam-expanding collimation device 15, carries out spot diameter expansion for the pulse signal launched by laser instrument 15, reduces coherent light because high-energy is to the damage of beam splitter device 3; Expanded scope 2 ~ 4 times.
Embodiment nine, on embodiment one or eight basis, this device also comprises optical delay device 16, for regulating the phase place of the road coherent light produced through beam splitter device 3, make the two bundle coherent light phase places through beam splitter device generation consistent, described optical delay device 16 comprises the 3rd catoptron 21, the 4th catoptron 22, right-angle prism the 23, three catoptron 21 for carrying out 90 ° of deflections to the road coherent light produced through beam splitter device 3; The deflection of right-angle prism 23 for carrying out 180 ° to the coherent light through the 3rd catoptron 21; 4th catoptron 22 is for carrying out 90 ° of deflections to the coherent light through right-angle prism 23.
Embodiment ten: on embodiment one or nine basis, when beam splitter device 3 be Glan prism or polarization splitting prism time, described reference light regulating device also comprises the second polarization state regulating device 14, for regulating the polarization state of another road coherent light through beam splitter device output, make the road coherent light through the second polarization state regulating device 14 have identical polarization state with the road coherent light through collimator and extender device 4, described second polarization state regulating device 14 can be half-wave plate, polaroid, compensator or Faraday polarization apparatus.
Preferred embodiment, as shown in Figure 2, on embodiment six basis, this device also comprises polarization state regulating device 2, the 3rd beam-expanding collimation device 15, optical delay device 16, wherein described optical delay device as shown in Figure 4.
Several stereolithography process of Particle Field transient state:
Four, several stereolithography process of Particle Field transient state comprise
Embodiment one, several stereolithography process of Particle Field transient state comprise the following steps:
Step one: sync control device 13 detects the moment that observation area 9 appears at observation area, and trigger pip is to coherent light generation device, transmits control signal to acoustooptic deflector 6;
Step 2: coherent light generation device detects the trigger pip of sync control device 13, produce two-way coherent light, wherein a road coherent light is formed with the information of the particles field and irradiates the object light on holographic dry plate after object light regulating device, another road coherent light forms not angle continually varying in the same time through reference light regulating device and irradiates the reference light on holographic dry plate, object light and reference light are formed on holographic dry plate interferes, and carries out record exposure.
Embodiment two, as shown in Figure 3, several stereolithography process of Particle Field transient state comprise sync control device 13 and comprise photodetector 17, digital delay device 19, single-chip microcomputer 18, acoustooptic deflector power supply 20; Described coherent light generation device comprises laser instrument 1, beam splitter device 3; Object light regulating device comprises the first beam-expanding collimation device 4, second catoptron 8; Reference light regulating device comprises the first catoptron 5, acoustooptic deflector 6, second beam-expanding collimation device 7, first passes as device 10, and following steps concrete steps are:
Step one: appearance Particle Field being detected by photoelectric detector in sync control device 13 before Particle Field enters observation area 9, and export detectable signal to digital delay device 19 simultaneously;
Step 2: when digital delay device 19 detects detectable signal, sends trigger pip to laser instrument 1 and single-chip microcomputer 18 after the time interval of setting;
Step 3: after single-chip microcomputer 18 detects the trigger pip that digital delay device 19 sends, changes the outputting drive voltage frequency of acoustooptic deflector power supply 20, and then controls acoustooptic deflector deflection angle according to the time interval of setting;
Step 4: laser instrument 1 detects the trigger pip of digital delay device 19, produces laser pulse;
Step 5: the laser pulse that laser instrument 1 produces is divided into two-way coherent light through beam splitter device 3, wherein a road coherent light forms object light through object light regulating device, wherein first-selected needs adopts optical delay device 16 to carry out the adjustment of a phase, observation area 9 is being adjusted to through the second catoptron 8, now when Particle Field enters observation area 9, the Electro-Optical Sensor Set of sync control device 13 can detect the moment that in observation area 9, Particle Field occurs, on holographic dry plate 12, the object light with the information of the particles field is defined after the coherent light simultaneously reflected through the second catoptron 8 have recorded the information of the particles field.
Step 6: the laser pulse that laser instrument 1 produces is divided into two-way coherent light through beam splitter device 3, wherein another road coherent light regulates through acoustooptic deflector 6 after the first catoptron 5 again, because acoustooptic deflector 6 is under beam deflecting device power supply 20 different frequency controls, produce the reference light of not different angles deflection in the same time, the reference light of different angles deflection does not in the same time irradiate on holographic dry plate, form the interference fringe of not different pattern in the same time from the object light formed before, namely define Particle Field not several holograms in the same time.
Embodiment three, on embodiment two basis, the laser pulse produced by the first polarization state regulating device 2 pairs of laser instruments carries out polarization state adjustment;
Embodiment four, on embodiment one or three basis, when beam splitter device 3 is Glan prisms, described reference light regulating device also comprises the second polarization state regulating device 14, for regulating the polarization state of another road coherent light through beam splitter device output, make the road coherent light through the second polarization state regulating device 14 have identical polarization state with the road coherent light through collimator and extender device 4, described second polarization state regulating device 14 can be half-wave plate, polaroid, compensator or Faraday polarization apparatus.Also regulate by the second polarization state regulating device 14, the second polarization state regulating device 14 regulates for another road coherent light polarization state produced beam splitter device 3;
Embodiment five, on embodiment one or four basis, also pass by second and regulate as device 11, second biography is positioned between observation area 9 and holographic dry plate as device 11, for being delivered to holographic dry plate 12 by forming the object light of object being observed information in observation area 9 through observation area 9, the described second distance passed as device 11 and holographic dry plate 12 passes the long 5mm ~ 30mm of back focal length as device 11 or short 5mm ~ 30mm than described second.
Embodiment six, on embodiment one or five basis, also regulate by the first polarization state regulating device 2, the first polarization state regulating device 2 is half-wave plate, compensator, polaroid or Faraday polarization apparatus, produces the polarization state of pulse signal for adjusting laser instrument 1.
Embodiment seven, on embodiment one or five basis, also regulate by the 3rd beam-expanding collimation device 15,3rd beam-expanding collimation device 15 expands for the spot diameter of the laser pulse launched by laser instrument 1, reduce coherent light because high-energy is to the damage of beam splitter device 3, expanded scope 2 ~ 4 times.
Embodiment eight, on embodiment one or five basis, also regulate by optical delay device 16, optical delay device 16 is for regulating the phase place of the road coherent light produced through beam splitter device 3, make the two bundle coherent light phase places through beam splitter device generation consistent, as shown in Figure 4, described optical delay device 16 comprises the 3rd catoptron 21, for carrying out 90 ° of deflections to the road coherent light produced through beam splitter device 3; Right-angle prism 23, for carrying out 180 ° of deflections to the coherent light through the 3rd catoptron; 4th catoptron 22, for carrying out the deflection of 90 ° to the coherent light through right-angle prism 23.
Embodiment nine, on embodiment one or two basis, is regulated by the first polarization state regulating device 2, the 3rd beam-expanding collimation device 15, optical delay device 16.
The present invention is not limited to aforesaid embodiment.The present invention expands to any new feature of disclosing in this manual or any combination newly, and the step of the arbitrary new method disclosed or process or any combination newly.
Claims (9)
1. a particle field transient multi-picture holography device, is characterized in that comprising coherent light generation device, object light regulating device, reference light regulating device, sync control device, photo-induced polymer holographic dry plate,
Coherent light generation device, for receiving the trigger pip of sync control device and producing laser pulse and be divided into two bundle coherent lights;
Object light regulating device, for being produced by coherent light generation device two restraint a branch of introducing observation area in coherent lights, and be observation area and provide back lighting, this Shu Guang becomes object light behind observation area;
Sync control device, for providing control signal to coherent light generation device, reference light regulating device respectively;
Reference light regulating device, angle and the polarization state of another bundle coherent light produced for regulating coherent light generation device form reference light, and the object light that object light regulating device is regulated and reference light are formed interferes;
Photo-induced polymer holographic dry plate, for recording the interference fringe of object light and reference light formation;
Described sync control device comprises Electro-Optical Sensor Set, for the appearance of Particle Field being detected before entering observation area in Particle Field, and exports detectable signal to digital delay device simultaneously;
Digital delay device, for receive Electro-Optical Sensor Set detectable signal after, after the delay time of setting, give laser instrument and send trigger pip to single-chip microcomputer;
Single-chip microcomputer, for after the trigger pip that digital delay device sends being detected, changes the outputting drive voltage frequency of acoustooptic deflector power supply according to the time interval of setting;
Acoustooptic deflector power supply, for controlling the deflection angle of acoustooptic deflector after the driving voltage frequency control signal receiving single-chip microcomputer output.
2. a kind of particle field transient multi-picture holography device according to claim 1, is characterized in that described coherent light generation device comprises
Laser instrument, produces laser pulse for the trigger pip exported according to sync control device;
Beam splitter device, pulse signal for being produced by laser instrument is divided into two bundle coherent lights and is input to object light regulating device, reference light regulating device respectively, and it is 1:2 ~ 1:30 that beam splitter device is input to another road luminous power ratio that a road light of object light regulating device and beam splitter device be input to reference light regulating device.
3. a kind of particle field transient multi-picture holography device according to claim 2, is characterized in that described object light regulating device comprises
First beam-expanding collimation device, amplify for the road coherent light spot diameter produced by interference light generation device, its enlargement factor is 10 ~ 40 times;
Second catoptron, for the object light of the first beam-expanding collimation device is reflexed to observation area, is formed with object being observed information in observation area and the object light of irradiating in photo-induced polymer holographic dry plate.
4. a kind of particle field transient multi-picture holography device according to claim 3, it is characterized in that described object light regulating device also comprises the second biography as device, described second biography is positioned between observation area and photo-induced polymer holographic dry plate as device, for the object light forming object being observed information in observation area through observation area is delivered to photo-induced polymer holographic dry plate, second biography comprises the 3rd lens as device, 4th two, lens lens, described 3rd lens, 4th saturating focal length is equal, described second distance passed as device and photo-induced polymer holographic dry plate passes the long 5mm ~ 30mm of back focal length as device or short 5mm ~ 30mm than described second.
5. a kind of particle field transient multi-picture holography device according to claim 4, is characterized in that described reference light regulating device comprises
First catoptron, the angle of another road coherent light produced for regulating beam splitter device;
Acoustooptic deflector, the control signal for exporting according to sync control device produces controlled frequency and makes to deflect through the coherent light of acoustooptic deflector, and acoustooptic deflector range of deflection is 0 ~ 3.2 °;
Second beam-expanding collimation device, for being amplified by the coherent light spot diameter through acoustooptic deflector generation angular deflection, it is 1:2 ~ 5:1 that the first beam-expanding collimation device and the second beam-expanding collimation device expand ratio;
First passes as device, for the coherent light amplified through beam-expanding collimation device is reached photo-induced polymer holographic dry plate, first biography comprises the first lens, the second lens two lens as device, described first lens, the second saturating focal length are equal, first distance passed as device distance acoustooptic deflector equals to pass the front focal length as device, and the first distance passed as device distance photo-induced polymer holographic dry plate equals to pass the back focal length as device; When wherein reference light does not deflect and the angle of object light be 10 ° ~ 30 °, the angle of object light and photo-induced polymer holographic dry plate normal is 10 ° ~ 30 °.
6. according to a kind of particle field transient multi-picture holography device one of claim 1 to 5 Suo Shu, its feature is also comprising the first polarization state regulating device, at least one optical delay device, the 3rd beam-expanding collimation device, described first polarization state regulating device is half-wave plate, compensator, polaroid or Faraday polarization apparatus, produces the polarization state of pulse signal for adjusting laser instrument; 3rd beam-expanding collimation device, the spot diameter for the pulse signal launched by laser instrument enters amplification, reduces pulse laser because high power is to the damage of beam splitter device; Optical delay device, for regulating the phase place of the road coherent light produced through beam splitter device, make the two bundle coherent light phase places through beam splitter device generation consistent, described optical delay device comprises
3rd catoptron, for carrying out 90 ° of deflections to the road coherent light produced through beam splitter device;
Right-angle prism, for carrying out 180 ° of deflections to the coherent light through the 3rd catoptron;
4th catoptron, for carrying out the deflection of 90 ° to the coherent light through right-angle prism.
7. a kind of particle field transient multi-picture holography device according to Claims 2 or 3, it is characterized in that when beam splitter device is Glan prism, described reference light regulating device also comprises the second polarization state regulating device, for regulating the polarization state of another road coherent light through beam splitter device output, make the road coherent light through the second polarization state regulating device have identical polarization state with the road coherent light through collimator and extender device, described second polarization state regulating device comprises half-wave plate, polaroid, compensator or Faraday polarization apparatus.
8. several stereolithography process of Particle Field transient state, is characterized in that comprising
Step one: sync control device detects the moment that Particle Field appears at observation area, and trigger pip is to coherent light generation device, transmits control signal to acoustooptic deflector;
Step 2: coherent light generation device detects the trigger pip of sync control device, produce two-way coherent light, wherein a road coherent light is formed with the information of the particles field and irradiates the object light on photo-induced polymer holographic dry plate after object light regulating device, another road coherent light forms not the reference light of irradiation on photo-induced polymer holographic dry plate of different angles deflection in the same time through reference light regulating device, object light and reference light are formed at photo-induced polymer holographic dry plate interferes, and carries out record exposure;
Wherein said sync control device comprises Electro-Optical Sensor Set, for the appearance of Particle Field being detected before entering observation area in Particle Field, and exports detectable signal to digital delay device simultaneously;
Digital delay device, for receive Electro-Optical Sensor Set detectable signal after, after the delay time of setting, give laser instrument and send trigger pip to single-chip microcomputer;
Single-chip microcomputer, for after the trigger pip that digital delay device sends being detected, changes the outputting drive voltage frequency of acoustooptic deflector power supply according to the time interval of setting;
Acoustooptic deflector power supply, for controlling the deflection angle of acoustooptic deflector after the driving voltage frequency control signal receiving single-chip microcomputer output.
9. a kind of several stereolithography process of Particle Field transient state according to claim 8, is characterized in that described sync control device comprises photodetector, digital delay device, single-chip microcomputer, acoustooptic deflector power supply; Described coherent light generation device comprises laser instrument, beam splitter device; Object light regulating device comprises the first beam-expanding collimation device, the second catoptron; Reference light regulating device comprises the first catoptron, acoustooptic deflector, the second beam-expanding collimation device, the first biography as device, specifically comprises step:
Step one: appearance Particle Field being detected by photoelectric detector in sync control device before particle enters observation area, and send detectable signal to digital delay device simultaneously;
Step 2: when digital delay device detects detectable signal, sends trigger pip to laser instrument and single-chip microcomputer after the time delays of setting;
Step 3: after the trigger pip that microprocessor detect sends to digital delay device, changes the outputting drive voltage frequency of acoustooptic deflector power supply, and then controls acoustooptic deflector deflection angle according to the time interval of setting;
Step 4: laser instrument detects the trigger pip of digital delay device, produces laser pulse;
Step 5: the laser pulse that laser instrument produces is divided into two-way coherent light through beam splitter device, wherein a road coherent light forms object light through object light regulating device, the wherein first-selected adjustment needing at least one employing optical delay device to carry out a phase, observation area is adjusted to again through the second catoptron, now when Particle Field enters observation area, carry the information of the particles field through the coherent light of the second catoptron reflection on photo-induced polymer holographic dry plate, define object light with the information of the particles field right through observation area;
Step 6: the laser pulse that laser instrument produces is divided into two-way coherent light through beam splitter device, wherein another road coherent light regulates through acoustooptic deflector after the first catoptron again, because acoustooptic deflector is under beam deflecting device power supply different frequency controls, produce the reference light of different angles deflection, the reference light of different angles deflection does not in the same time irradiate on photo-induced polymer holographic dry plate, form the interference fringe of not different pattern in the same time from the object light formed before, namely define Particle Field not several holograms in the same time.
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