CN2789757Y - Real-time dynamic volume holographic diffraction efficiency measuring device - Google Patents
Real-time dynamic volume holographic diffraction efficiency measuring device Download PDFInfo
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- CN2789757Y CN2789757Y CN 200520078510 CN200520078510U CN2789757Y CN 2789757 Y CN2789757 Y CN 2789757Y CN 200520078510 CN200520078510 CN 200520078510 CN 200520078510 U CN200520078510 U CN 200520078510U CN 2789757 Y CN2789757 Y CN 2789757Y
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- 230000010287 polarization Effects 0.000 claims abstract description 45
- 238000001514 detection method Methods 0.000 claims abstract description 28
- 230000007935 neutral effect Effects 0.000 claims abstract description 24
- 238000005259 measurement Methods 0.000 claims abstract description 23
- 230000003287 optical effect Effects 0.000 claims abstract description 16
- 230000028161 membrane depolarization Effects 0.000 claims description 17
- 230000001105 regulatory effect Effects 0.000 claims description 17
- 238000000034 method Methods 0.000 abstract description 15
- 230000004044 response Effects 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 5
- 239000000463 material Substances 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 4
- 230000007547 defect Effects 0.000 abstract 1
- 238000011161 development Methods 0.000 abstract 1
- 230000018109 developmental process Effects 0.000 abstract 1
- 238000001093 holography Methods 0.000 description 17
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 238000004891 communication Methods 0.000 description 4
- 230000001066 destructive effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000011572 manganese Substances 0.000 description 4
- 230000021615 conjugation Effects 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 230000035945 sensitivity Effects 0.000 description 3
- 208000005189 Embolism Diseases 0.000 description 2
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 2
- GQYHUHYESMUTHG-UHFFFAOYSA-N lithium niobate Chemical compound [Li+].[O-][Nb](=O)=O GQYHUHYESMUTHG-UHFFFAOYSA-N 0.000 description 2
- 229910052748 manganese Inorganic materials 0.000 description 2
- 238000009659 non-destructive testing Methods 0.000 description 2
- 230000011514 reflex Effects 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 229910013641 LiNbO 3 Inorganic materials 0.000 description 1
- KLARSDUHONHPRF-UHFFFAOYSA-N [Li].[Mn] Chemical compound [Li].[Mn] KLARSDUHONHPRF-UHFFFAOYSA-N 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
- 238000013480 data collection Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 238000002310 reflectometry Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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Abstract
The utility model relates to a real-time developments volume holographic diffraction efficiency measuring device can provide the stronger object light and the reference light that are used for the volume holographic record to and with the conjugated very weak reappear light of reference light, the intensity and the polarization state of three bundles of light all can be adjusted and combined through 1/4 wave plates, polaroid and neutral attenuation piece, thereby can take notes the light intensity modulation type or polarization state modulation type volume hologram. The optical conjugate technology is adopted, so that the nondestructive real-time measurement of the dynamic volume hologram can be realized by means of very weak conjugate reproduction light in the photorefractive or photochromic dynamic volume hologram establishing process, the defects of read-out erasing effect and slow response speed in the prior art are overcome, and the method has the advantages of no interference, nondestructive detection, high response speed, continuous measurement, wide measurement range, convenience in adjustment, low noise and the like, and is suitable for photochromic refractive index change and photochromic holographic recording materials.
Description
Technical field
The utility model relates to a kind of measurement instrument of optical characteristics of hologram recording material, relates in particular to a kind of dynamic holographic non-destructive real-time optical characteristic measuring device.
Background technology
The ultimate principle of optical holography is with wave interference and is diffracted to the basis.Laser hologram is stored in two-forty, there is great potential in the massage storage field.The laser hologram storage comprises plane holographic and body holography, the body holography has characteristics such as compactedness, high density and fast parallel visit, in addition, the outstanding feature of body holography is: the holography of being write down in the photorefractive material is a dynamic body holography, that is to say, reference light and reproduce to exist between the diffraction light and intercouple between thing light and the reference light and in the holographic readout comprises the mutual transfer of energy and the relative variation of a phase in the holographic recording process.
In order to reflect the power of dynamic volume holographic grating, prior art is (referring to JOURNAL OF OPTICALSOCIETY OF AMERICA B, Vol.9, NO.9, SEPTEMBER 1992, P1673-1684) adopt in body holographic recording process, every certain time interval, block thing light and only allow reference light pass through holographic recording medium, measure the power of its diffraction light simultaneously, and the ratio of definition diffraction light and incident optical power is a diffraction efficiency.Diffraction efficiency formula according to volume holographic grating can calculate the grating index modulation degree.All adopted this device in many measuring body hologram diffraction Study on Efficiency.But there are following two significant disadvantages in this device:
1, erasure effect is read in existence.Periodically cut off thing light, can cause the part of hologram to be wiped and read the thing optical information of being stored with stronger even reference light, and thisly read erasure effect enforceable extraneous intervention can produce bigger random noise to light path, destroyed the normal recordings process of original holography;
2, response speed is slow.For the higher holographic recording medium of body holographic recording sensitivity, the foundation of holographic grating and read erasing speed all very fast (second-time), but since to the cut-out of light path and open frequency can not be very high, thereby this device can not reflect accurately that holographic grating sets up the details of process.
Summary of the invention
The utility model purpose provides a kind of device of in real time, non-destructive measuring holographic diffraction efficiency of dynamic object based on phase conjugation, and it has solved the prior art existence and has read erasure effect and the slow shortcoming of response speed.
Technology of the present utility model solves its scheme:
A kind of Real-time and Dynamic body hologram diffraction efficiency measurement device, but the light power meter 11 and the control computer 12 that comprise the recording holographic light diffraction efficiency, the LASER Light Source 1 of holographic recording light can be provided, the automatically controlled shutter 3 of may command holographic recording time, be arranged on after the automatically controlled shutter 3, first spectroscope that described holographic recording light can be divided into thing light b1 and reference light b2, described thing light b1 can be reflexed to the thing light path total reflection plated film level crossing 13 of holographic recording medium 9, its special character is: the light path of described reference light b2 is provided with can tell second spectroscope of surveying light b3 and reference light b2 being reflexed to holographic recording medium 9 from reference light b2; Describedly can symmetry be incident on the holographic recording medium 9 through the thing light b1 of total reflection plated film level crossing 13 reflection with through the reference light b2 of second beam split rib reflection; The light path of described detection light b3 is provided with three and surveys light path total reflection plated film level crossing 6,7,8, and described three total reflection plated film level crossings can carry out the conjugate beam b4 that triple reflection forms reference light b2 with surveying light b3; Be provided with the spectroscope that the diffraction light b5 of conjugate beam b4 can be reflexed to light power meter 11 between described thing light path total reflection plated film level crossing 13 and the holographic recording medium 9.
In the neutral attenuator 16 of thing light of thing light path polaroid 15, instrumentality light intensity or power of thing light path quarter wave plate 14, instrumentality polarization of light type of instrumentality optical circular polarizing type one or more can be set on above-mentioned thing light path; In the neutral attenuator 19 of reference light of reference path quarter wave plate 17, the reference path polaroid 18 of regulating the reference ray polarization type of regulating reference light circular polarization type can be set between described second spectroscope and the holographic recording medium 9, regulating reference light intensity or power one or more; Detection light path quarter wave plate 20, the detection light path polaroid 21 of regulating the probing light polarization type that regulate to survey the optical circular polarizing type can be set on the described detection light path, regulate in the neutral attenuator 22 of the detection light of surveying light intensity or power one or more.
Be provided with the thing light path quarter wave plate 14 of instrumentality optical circular polarizing type between above-mentioned thing light path total reflection plated film level crossing 13 and the holographic recording medium 9, the thing light path polaroid 15 of instrumentality polarization of light type, the neutral attenuator 16 of the thing light of instrumentality light intensity or power; Be provided with the reference path quarter wave plate 17 of regulating reference light circular polarization type between described second spectroscope and the holographic recording medium 9, regulate the reference path polaroid 18 of reference ray polarization type, regulate the neutral attenuator 19 of reference light of reference light intensity or power; Described detection light path is provided with regulates the detection light path quarter wave plate 20 of surveying the optical circular polarizing type, regulates the detection light path polaroid 21 of probing light polarization type, regulates the neutral attenuator 22 of the detection light of surveying light light intensity or power.
Above-mentioned first spectroscope can be the first depolarization Amici prism 4 or the semi-transparent semi-reflecting beam splitter 23 of the first filming; Described second spectroscope can be the second depolarization Amici prism 5 or the semi-transparent semi-reflecting beam splitter 24 of second plated film; Described spectroscope can be depolarization Amici prism 25 or semi-transparent semi-reflecting level crossing 10.
Said apparatus also comprises the polaroid 2 that is arranged between LASER Light Source 1 and the automatically controlled shutter 3, holographic recording light can be become linearly polarized light.
The utility model has the advantages that:
1, realizes noiseless, Non-Destructive Testing.Can make the power of conjugate beam b4 only be 1/1000 of thing light b1 and reference light b2 power by regulating quarter wave plate, polaroid and neutral attenuator, this is equivalent to read holography with a very faint light, thereby can ignore the holographic erasure effect of reading.The employing of light yoked technique has realized that the non-destructive of body hologram diffraction efficient measures in real time.
2, response speed is fast.Light power meter 11 is finished gathering in real time automatically of data by RS-232 interface and computing machine 12 mutual communication.The response speed of this real-time measurement can be very fast, and it depends on the response speed of optical power detector.At the height of different holographic recording medium sensitivity and the variation speed of diffraction efficiency, can set the suitable data sampled point time interval, thereby reflect the details of dynamic body hologram diffraction.
But 3 continuous coverages.The utility model adopts phase conjugation, and in holographic recording, conjugate beam b4 is the variation of reflected diffraction light in real time, does not need periodically to cut off thing light, thereby can carry out continuous body holographic recording and read measurement.
4, measurement range is wide, and is easy to adjust.Can make thing light b1, reference light b2 and survey light b3 and have different power and polarization state by regulating quarter wave plate, polaroid and neutral attenuator, artificially the refractive index body holography of inducing of recording light modulation or the refractive index body holography of polarization state modulation-induced.This technology can be studied the dependence of hologram recording material to luminous power and polarization state easily, is applicable to that photon-induced refractive index changes and photochromic hologram recording material.
5, noise is little.Existing metering system influences the facular model of diffraction light, and the real-time measurement that the utility model adopted does not need periodically to cut off thing light, can reduce the random noise that the mandatory intervention of outer bound pair light path is produced significantly.
The explanation of accompanying drawing drawing
Fig. 1 is first kind of Real-time and Dynamic body hologram diffraction efficiency measurement apparatus structure synoptic diagram;
Fig. 2 is second kind of Real-time and Dynamic body hologram diffraction efficiency measurement apparatus structure synoptic diagram;
Fig. 3 mixes the measurement result that iron is mixed manganese lithium niobate codope crystal body hologram diffraction efficient;
Reference numeral wherein: 1-LASER Light Source, the 2-polaroid, the automatically controlled shutter of 3-, the 4-first depolarization Amici prism, the 5-second depolarization Amici prism, 6,7,8-surveys light path total reflection plated film level crossing, 9-holographic recording medium, the semi-transparent semi-reflecting level crossing of 10-, the 11-light power meter, the 12-control computer, 13-thing light path total reflection plated film level crossing, 14-thing light path quarter wave plate, 15-thing light path polaroid, the neutral attenuator of 16-thing light path, 17-reference path quarter wave plate, 18-reference path polaroid, the neutral attenuator of 19-reference path, 20-surveys the light path quarter wave plate, and 21-surveys the light path polaroid, and 22-surveys the neutral attenuator of light path, the semi-transparent semi-reflecting beam splitter of 23-the first filming, the semi-transparent semi-reflecting beam splitter of 24-second plated film, 24-depolarization Amici prism, b1-thing light, the b2-reference light, b3-surveys light, the conjugate beam of b4-reference light b2, and b5-conjugate beam b4 is through the diffraction light behind the holographic recording medium.
Embodiment
Fig. 1 is first kind of Real-time and Dynamic body hologram diffraction efficiency measurement apparatus structure synoptic diagram.Holographic recording light is provided by LASER Light Source 1, and LASER Light Source 1 can be changed different wave length output according to the needs of different holographic recording mediums 9.The light of LASER Light Source 1 output is if partial poolarized light, then available polaroid 2 becomes linearly polarized light, the light of LASER Light Source 1 output is if linearly polarized light, then do not use polaroid 2 in the device, the holographic recording time is controlled by automatically controlled shutter 3 by control computer 12, the holographic recording linearly polarized light is divided into three-beam by the first depolarization Amici prism 4 and the second depolarization Amici prism 5, i.e. thing light b1, reference light b2 and detection light b3.It is that example illustrates the thing light b1 that how to obtain varying strength and different polarization states with the thing light path below: the neutral attenuator 16 of embolus light path quarter wave plate 14 and thing light path on the thing light path, gig light path quarter wave plate 14, making its fast axle is clockwise 45 ° or counterclockwise 45 ° with incident light polarization printing opacity angular separation, thereby linearly polarized light is become dextrorotation rotatory polarization or left-handed rotatory polarization, and the neutral attenuator 16 of gig light path obtains the light of varying strength or power; If embolus light path polaroid 15 again on the thing light path can obtain vertical curve polarized light or horizontal linear polarization light by gig light path polaroid 15.Adjusting way and the thing light b1 of reference light b2 and detection light b3 are identical.In a word, by regulating quarter wave plate, polaroid and neutral attenuator, can obtain thing light b1, reference light b2 and survey the various combinations that light b3 has different polarization states and varying strength.Any a branch of light in this three-beam all is adjustable as a certain polarization state in vertical polarization, horizontal polarization, Left-hand circular polarization and the right-hand circular polarization.When thing light b1 is identical with reference light b2 polarization state, the refractive index body holography that intensity modulation is induced will be produced; When thing light b1 and reference light b2 polarization state quadrature, the refractive index body holography of polarization state modulation will be produced.Regulating detection light path total reflection plated film level crossing 6,7,8 makes detection light b3 exactly become the conjugate beam b4 of reference light b2.In order to realize the diffraction efficiency of non-destroyed measurement body holography, can with the intensity adjustments of conjugate beam b4 1/1000 of thing light b1 and reference light b2 by the neutral attenuator of regulating on three light paths.The instrumentality light total reflection plated film level crossing 13 and the second depolarization Amici prism 5 make thing light b1 and reference light b2 symmetry be incident on the holographic recording medium 9, also are that the angular bisector of thing light b1 and reference light b2 overlaps with the normal of holographic recording medium 9.Regulate detection light path total reflection plated film level crossing 7 and 8 and make its reflected light propagate against the direction of reference light b2 just, promptly form the conjugate beam b4 of reference light b2 just.Regulate holographic recording medium 9, make thing light b1, reference light b2 and conjugate beam b4 in the inner intact coincidence of holographic recording medium.The diffraction light of conjugate beam b4 behind holographic recording medium 9 reflexes to light power meter 11 via semi-transparent semi-reflecting level crossing 10, and light power meter 11 is finished gathering in real time automatically of data by RS-232 interface and control computer 12 mutual communication.Because just part is by semi-transparent semi-reflecting level crossing 10 reflections for diffraction light, final diffraction light power should be the reflectivity of the magnitude of power of detection divided by semi-transparent semi-reflecting level crossing 10.
Fig. 2 is second kind of Real-time and Dynamic body hologram diffraction efficiency measurement apparatus structure synoptic diagram.Replace the first depolarization Amici prism 4 and the second depolarization Amici prism 5 in first kind of device respectively with the semi-transparent semi-reflecting beam splitter 23 of the first filming, the semi-transparent semi-reflecting beam splitter 24 of second plated film, the holographic recording linearly polarized light is divided into three-beam by the first semi-transparent semi-reflecting beam splitter 23 and the second semi-transparent semi-reflecting beam splitter 24; Because do not insert polaroid in the light path, then Ci Shi holographic recording light is circularly polarized light; Regulate quarter wave plate, can obtain dextrorotation rotatory polarization or left-handed rotatory polarization; Replace semi-transparent semi-reflecting level crossing 10 with depolarization Amici prism 25, then the diffraction light b5 of conjugate beam b4 behind holographic recording medium 9 reflexes to light power meter 11 through depolarization Amici prism 25.All the other structures of second kind of device are identical with all the other structures of first kind of device.
A kind of body holographic recording medium that the utility model adopted is mixed manganese (LiNbO for mixing iron through the lithium niobate of high temperature oxidation process
3: Fe:Mn) monocrystal, crystal are processed into length and width and the thick 20mm of being respectively, and the rectangular parallelepiped of 10mm and 5mm, direction of optic axis are all along Width, and all surface has all carried out optical polish.He-Ne laser instrument (Melles Griot company, power 35mW, 500: 1 vertical polarizations of extinction ratio, basic mode TEM
00＞95%, spot diameter is 1.24mm) emission wavelength is that the ruddiness of 632.8nm is as recording light.Adopt Ultima LabMaster binary channels light power meter (probe model LM-2-Vis, wavelength coverage 0.4～1.06 μ m of relevant company; Peak power 50mW, resolution 1nW, data sampling minimum interval 0.1s) measure diffraction light power, and, realize real-time data acquisition by RS-232 interface and computing machine mutual communication.Diffraction efficiency is diffraction light b5 and the ratio of the power of conjugate beam b4.Fig. 3 has provided lithium niobate and has mixed iron and mix manganese (LiNbO
3: a Fe:Mn) measurement result of codope crystal body hologram diffraction efficient, thing light b1 and reference light b2 power are 8mW in the experiment, and angle is 30 °, and conjugate beam b4 power is 8 μ W, and three-beam is vertical polarized light, and data acquisition is spaced apart 3 seconds.From experimental result as can be seen, it is very steady that this volume holographic grating is set up process, and noise is little.
The utility model principle:
The utility model is that the holographic non-destructive of a kind of dynamic body is measured and the automatic data collection device in real time, accurately the process of setting up of the real-time diffraction efficiency of measuring body holographic grating and description grating.
The utility model measuring process is: LASER Light Source provides holographic recording light, if this holographic recording is partial poolarized light only, then it is become linearly polarized light with polaroid, control computer realizes the control of holographic recording time by automatically controlled shutter, two depolarization Amici prisms are divided into thing light with linearly polarized light, three light paths such as reference light and detection light, utilization is arranged on the total reflection plated film level crossing on each light path, quarter wave plate, polaroid and neutral attenuator can be realized thing light, the light path of reference light and detection light, the control of polarization state and intensity, realize the different polarization state combination, holographic recording under the varying strength combined situation and measuring condition, thing light and reference light symmetry incide holographic recording medium, regulating the total reflection plated film level crossing of surveying on the light path makes detection light exactly become the conjugate beam of reference light, conjugate beam is reflexed to light power meter through the diffraction light behind the holographic recording medium by semi-transparent semi-reflecting level crossing or depolarization Amici prism, and control computer is finished and the communication of light power meter and automatic real-time collection of finishing data by program.
Adopt the light yoked technique, the power of choosing conjugate beam only is 1/1000 of reference light, sell off or photochromic dynamic body holography is set up in the process at light, sell off or photochromic dynamic body holography with this very weak smooth playback light, avoided holographic in the readout and partly wiped, proposed to realize in the dynamic body holographic recording process technological thought noiseless, Non-Destructive Testing.
Real-time and Dynamic body hologram diffraction efficiency measurement device provides stronger thing light and the reference light that is used for the body holographic recording, and with the very weak conjugate beam of reference light conjugation, their intensity and polarization state all can be regulated and independent assortment by quarter wave plate, polaroid and neutral attenuator.Each Shu Guang is adjustable as vertical polarization, horizontal polarization, left-handed circle is inclined to one side and dextrorotation circle any one polarization state in partially.But thereby recording light modulation type or the holography of polarization state modulation type body.
Realize communicating by letter of computing machine and light power meter and finish the real-time data acquisition of diffraction light power by RS-232 interface.According to the height of body holographic recording medium sensitivity, the light power meter of replaceable different response speeds can be selected the suitable data sample frequency, reflects that in real time dynamic body holography sets up the details of process.
Claims (5)
1, a kind of Real-time and Dynamic body hologram diffraction efficiency measurement device, but the light power meter (11) and the control computer (12) that comprise the recording holographic light diffraction efficiency, the LASER Light Source (1) of holographic recording light can be provided, the automatically controlled shutter (3) of may command holographic recording time, be arranged on automatically controlled shutter (3) afterwards, first spectroscope that described holographic recording light can be divided into thing light (b1) and reference light (b2), described thing light (b1) can be reflexed to the thing light path total reflection plated film level crossing (13) of holographic recording medium (9), it is characterized in that: the light path of described reference light (b2) is provided with can tell second spectroscope of surveying light (b3) and reference light (b2) being reflexed to holographic recording medium (9) from reference light (b2); Described through total reflection plated film level crossing (13) reflection thing light (b1) and can symmetry be incident on the holographic recording medium (9) through the reference light (b2) of second beam split rib reflection; The light path of described detection light (b3) is provided with three and surveys light path total reflection plated film level crossing (6,7,8), and described three total reflection plated film level crossings can carry out the conjugate beam (b4) that triple reflection forms reference light (b2) with surveying light (b3); Be provided with the spectroscope that the diffraction light (b5) of conjugate beam (b4) can be reflexed to light power meter (11) between described thing light path total reflection plated film level crossing (13) and the holographic recording medium (9).
2, Real-time and Dynamic body hologram diffraction efficiency measurement device according to claim 1 is characterized in that: in the neutral attenuator of thing light (16) of thing light path polaroid (15), instrumentality light intensity or power of thing light path quarter wave plate (14), instrumentality polarization of light type of instrumentality optical circular polarizing type one or more can be set on described thing light path; In the neutral attenuator of reference light (19) of reference path quarter wave plate (17), the reference path polaroid (18) of regulating the reference ray polarization type of regulating reference light circular polarization type can be set between described second spectroscope and the holographic recording medium (9), regulating reference light intensity or power one or more; Detection light path quarter wave plate (20), the detection light path polaroid (21) of regulating the probing light polarization type that regulate to survey the optical circular polarizing type can be set on the described detection light path, regulate in the neutral attenuator of detection light (22) of surveying light intensity or power one or more.
3, Real-time and Dynamic body hologram diffraction efficiency measurement device according to claim 2, it is characterized in that: the thing light path quarter wave plate (14) that is provided with instrumentality optical circular polarizing type between described thing light path total reflection plated film level crossing (13) and the holographic recording medium (9), the thing light path polaroid (15) of instrumentality polarization of light type, the neutral attenuator (16) of the thing light of instrumentality light intensity or power; Be provided with the reference path quarter wave plate (17) of regulating reference light circular polarization type between described second spectroscope and the holographic recording medium (9), regulate the reference path polaroid (18) of reference ray polarization type, regulate the neutral attenuator (19) of reference light of reference light intensity or power; Described detection light path is provided with regulates the detection light path quarter wave plate (20) of surveying the optical circular polarizing type, regulates the detection light path polaroid (21) of probing light polarization type, regulates the neutral attenuator (22) of the detection light of surveying light light intensity or power.
4, according to claim 1 or 2 or 3 described Real-time and Dynamic body hologram diffraction efficiency measurement devices, it is characterized in that: described first spectroscope can be the first depolarization Amici prism (4) or the semi-transparent semi-reflecting beam splitter of the first filming (23); Described second spectroscope can be the second depolarization Amici prism (5) or the semi-transparent semi-reflecting beam splitter of second plated film (24); Described spectroscope can be depolarization Amici prism (25) or semi-transparent semi-reflecting level crossing (10).
5, Real-time and Dynamic body hologram diffraction efficiency measurement device according to claim 4, it is characterized in that: described device comprises the polaroid (2) that is arranged between LASER Light Source (1) and the automatically controlled shutter (3), holographic recording light can be become linearly polarized light.
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| CN 200520078510 CN2789757Y (en) | 2005-03-25 | 2005-03-25 | Real-time dynamic volume holographic diffraction efficiency measuring device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100443880C (en) * | 2005-03-25 | 2008-12-17 | 中国科学院西安光学精密机械研究所 | Real-time dynamic volume holographic diffraction efficiency measuring method and system |
| CN101236156B (en) * | 2008-03-11 | 2011-11-09 | 上海伟星光学有限公司 | Transmittance detection method for photochromic translucent material before and after color alteration |
| CN101274391B (en) * | 2007-03-28 | 2012-12-26 | 日立比亚机械股份有限公司 | Laser energy measuring unit and laser machining apparatus |
| CN110031430A (en) * | 2019-05-15 | 2019-07-19 | 中国工程物理研究院流体物理研究所 | Double detector time division multiplexing volume holographic material sensitivity real-time test device and method |
-
2005
- 2005-03-25 CN CN 200520078510 patent/CN2789757Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100443880C (en) * | 2005-03-25 | 2008-12-17 | 中国科学院西安光学精密机械研究所 | Real-time dynamic volume holographic diffraction efficiency measuring method and system |
| CN101274391B (en) * | 2007-03-28 | 2012-12-26 | 日立比亚机械股份有限公司 | Laser energy measuring unit and laser machining apparatus |
| CN101236156B (en) * | 2008-03-11 | 2011-11-09 | 上海伟星光学有限公司 | Transmittance detection method for photochromic translucent material before and after color alteration |
| CN110031430A (en) * | 2019-05-15 | 2019-07-19 | 中国工程物理研究院流体物理研究所 | Double detector time division multiplexing volume holographic material sensitivity real-time test device and method |
| CN110031430B (en) * | 2019-05-15 | 2024-03-12 | 中国工程物理研究院流体物理研究所 | Real-time testing device and method for sensitivity of double-detector time division multiplexing volume holographic material |
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