CN100346645C - Anaclasis variant holographic phase multiplexing storing and relative identifying method and system thereof - Google Patents
Anaclasis variant holographic phase multiplexing storing and relative identifying method and system thereof Download PDFInfo
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Abstract
The present invention relates to a holographic phase multiplexing storage in photorefractive crystals and relative identification method, and a system thereof, which belong to the fields of optical storage and relative identification. In order to solve the defect that the serviceable range of the prior art is limited, the storage method comprises the steps that light beams emitted from a laser device (1) are split by a beam-splitting mirror (4) after expanded by a space light filter (2) and a first Fourier lens (3); reference light receives the phase encoding of a column lens (8) after redirected by a first reflecting mirror (7), and the encoded reference light is converged into a photorefractive variant (5) by a second Fourier lens (9); signal light is loaded with information by a spatial light modulator (14) after redirected by a second charge-coupled device (12), and forms a Fourier transformation spectrum in the photorefractive variant (5) after passing through a fourth Fourier lens (15); the signal light and the reference light are mutually encountered and interfered in the photorefractive variant (5) and form volume phase gratings, so that holographic images are recorded; the column lens (8) is rotated by taking the reference light as a rotating shaft, so that different holograms can correspond to different phase addresses; the signal light which is stored in the photorefractive variant (5) is reproduced and identified. With the present invention, 30 images are recorded and reproduced in photorefractive material with identical small volume, and then identified with relative methods of which the accuracy rate is 100 percent.
Description
Technical field:
The invention belongs to optical storage and relevant recognition technology field.
Background technology:
In existing optical storage techniques, the Anaclasis variant holographic storage has shown great potential because of its concurrent reading and concurrent writing, big, the redundancy advantages of higher of storage density in the high density field of storage.Technology such as multiplexing, the wavelength multiplexing in space, angular multiplexed, phase multiplexing, electric field be multiplexing in body Hologram Storage development are suggested in succession.But because the principle defective that above various technology exists makes it have some problems in the commercialization process.
Spatial reuse refers to a kind of multiplexing method that reaches multiplexing purpose in storing process by mobile memory medium.Because each point can only be stored a width of cloth hologram when utilizing this technology to store, so storage density reduces greatly.
The wavelength multiplexing utilization be the selectivity of volume hologram to wavelength.Change the record light wavelength, on the same point of crystal, can write down several holograms, when reading, have only a width of cloth hologram to be read out at every turn, change and read light wavelength, can read different holograms.When adopting wavelength multiplexing, each hologram writes and reads with the light of different wave length separately, but all adopts identical angle, only simultaneously just satisfies Prague matching condition when playback wavelength and record reference light wave appearance, and other are Prague mismatch.Simultaneously, the proposition of wavelength multiplexing can not increase the crosstalk noise between the hologram because of the increase of page info amount, thereby can realize than angular multiplexed higher information capacity.Because this multiplex technique is to the inhibition ability of crosstalk noise, and the wave length addressing technology can avoid mechanical movement, and therefore, people extremely pay close attention to the wavelength multiplexing technology.But the data storage capacity of wavelength multiplexing is by wavelength regulation scope decision, and existing laser or tuning range are big inadequately, and perhaps big the but systems bulky of tuning range is difficult to regulate, and is difficult for making practical system, and costs an arm and a leg.
Angular multiplexed technology is that research at present is maximum, the multiplex technique of fullest.The angular selectivity of volume hologram makes different information pages can be superimposed upon the same space zone incoherently, is stored in the common volume of material, is distinguished with the reference light of different angles each other.The angular multiplexed selectivity of volume hologram to angle of having utilized when reading, has only a width of cloth hologram to satisfy Bragg condition to reading light at every turn, changes the angle of reading light and can read different holograms.Angular multiplexed co-wavelength is multiplexing to be compared, price is relatively low, but sequentially change reference light and need complicated addressing technique (as adopting acousto-optical device), it requires reliability and the high plant equipment of repeatability, and the hologram number that ought store more for a long time, be loaded with the flashlight of image information and the signal to noise ratio that the cross (talk) between image will reduce output information, the quality of reproduced image is descended, the hologram number of angular multiplexed storage is many more, average diffraction efficiency is just low more, and inevitably the crossview noise descends the signal to noise ratio of reproducing picture.
Electric field is multiplexing to be to utilize in storing process every width of cloth hologram to have different electric field strength to carry out multiplexingly, and that is that all right is ripe for this method, in a short time can not practicability.
Existing phase-code multiplexed technology can directly be carried out mathematical operations such as adding, subtract to different data pages in readout, and simple to operate, quick, is a kind of very attractive multiplex technique.Constantly the someone proposes new phase multiplexing method in recent years, and wherein people such as C.Denz proposes in 1991 that people such as certainty phase code (being the quadrature phase coding) and Ching-Cherng Sun proposed in 1996 utilizes frosted glass realization randomness phase code etc. the most representative.Afterwards, on the thought basis of these two kinds of multiplex techniques the most basic, people have proposed the multiplexing multiplexing method that waits of rotatable phase again, and in conjunction with other multiplexing method, have proposed methods such as angle-rotation is multiplexing and have improved memory capacity.But these phase multiplexing methods all can't be used for relevant identification owing to up to the present also do not have the CCD of distinguishable phase information, have therefore limited the scope of application.
The development of optical correlators is of long duration, and is based at first that the needs of fingerprint or characteristic character identification produce.Exist complex process, the difficulty such as location inconvenience etc. of preparation matched filter in traditional holography, limited further developing of optical correlators greatly.Now people have utilized the photorefractive material identification of be correlated with, place it in the traditional matched filter of replacement on the frequency plane of optics fourier transform system, have realized successfully that characteristic character discerns and convolution algorithm relevant with parallel optical.People combine the principle of memory and correlator again on this basis, in photorefractive material, stored the information of a plurality of spaces addressing with the mode of angular coding, they are again simultaneously as the matched filter of a plurality of spaces addressing of optical correlators, when reading light and be loaded with stored wherein a certain information, corresponding reference light direction will obtain its reference point at once when writing this information.Corresponding reference light direction in the information that is stored that part correlation is arranged with it also faint reference point can occur.Therefore degree of correlation that can identify stored several information and this information from the intensity and the locus of reference point and information thereof are encoded.
Summary of the invention:
Do not have the CCD of distinguishable phase information and can't be used for relevant identification at existing phase multiplexing method, cause the restricted deficiency of the scope of application, the invention provides a kind of Anaclasis variant holographic phase multiplexing storage and relative identifying method and system thereof.Anaclasis variant holographic cylindrical lens phase multiplexing storage of the present invention is achieved in that a with relative identifying method, the light beam of ejaculation from laser 1 is expanded with first fourier lense 3 by spatial light filter 2 restraints into the bigger directional light of area, directional light carries out beam splitting through beam splitter 4, is divided into flashlight that is positioned on beam splitter 4 transmitted light paths and the reference light that is positioned on beam splitter 4 reflected light paths; B, reference light change after the directions through rotatable cylindrical lens 8 through first speculum 7, and 8 pairs of reference lighies of cylindrical lens carry out phase code, and the reference light after second fourier lense 9 will be encoded converges in the Anaclasis variant 5; After c, flashlight changed direction through second speculum 12, uniform plane wave behind the 4th fourier lense 15, formed the Fourier transform frequency spectrum through being loaded information after the spatial light modulator 14 in Anaclasis variant 5; The interference of in Anaclasis variant 5, meeting of d, flashlight and reference light, organizator phase grating in Anaclasis variant 5, thus realize the record of hologram image; E, be rotating shaft rotation cylindrical lens 8 with the reference light, and then change the phase place of reference light, thereby realize the phase bit address that different holograms is corresponding different; The process of the flashlight of f, reproduction Anaclasis variant 5 stored is: by second shutter, 13 shutdown signal light, utilize reference light to read volume hologram, thereby read output signal light, flashlight utilizes second charge coupled device, 12 received signal light after by the 5th fourier lense 16 then; G, identification signal only are not that the process of the flashlight of Anaclasis variant 5 stored is: close reference light by first shutter 6, utilize flashlight to read reference light, have only when flashlight is the flashlight that has been recorded in the Anaclasis variant 5, corresponding reference light in first charge coupled device 11 is just the strongest, thereby whether definite flashlight is canned data in the Anaclasis variant 5.
The storage of Anaclasis variant holographic cylindrical lens phase multiplexing comprises laser 1, spatial light filter 2, first fourier lense 3 and the beam splitter 4 that is positioned at successively on the same main optical path with relevant recognition system, the device of transmission signals light, the device of transmission reference light, Anaclasis variant 5, the device of described transmission reference light are made up of first electronic shutter 6 on the reflected light path that is positioned at beam splitter 4, first speculum 7, rotatable cylindrical lens 8, second fourier lense 9, the 3rd fourier lense 10, first charge coupled device 11 successively.The device of transmission signals light is made up of second speculum 12 on the transmitted light path that is positioned at beam splitter 4, second electronic shutter 13, spatial light modulator 14, the 4th fourier lense 15, the 5th fourier lense 16, second charge coupled device 17 successively.Anaclasis variant 5 is positioned at the intersection of the reference beam and the signal beams that the 4th fourier lense 15 is exported of 9 outputs of second fourier lense.
In the present invention, monochromatic plane wave is by behind the post lens, can be compressed to along the axial direction of cylindrical lens, again through a fourier lense, compressed reference light can converge to a very little zone, when itself and flashlight meet in Anaclasis variant when interfering, organizator phase grating in Anaclasis variant, thus realize the record of hologram image.The column spinner lens will change the phase place of reference light, thereby realize the phase bit address that different holograms is corresponding different, reach the purpose of phase code.The present invention utilizes this principle can realize relevant identification, i.e. the fourier lense of a suitable focal length of the adding of the correct position behind Anaclasis variant makes reference light be compressed into a very narrow line segment.When utilizing flashlight to read reference light, have only when flashlight is the flashlight that has been recorded in the Anaclasis variant, its corresponding reference light is just the strongest, thereby determines that whether flashlight is canned data in the Anaclasis variant.The present invention sells off the phase multiplexing technology to a kind of new light and combines with relevant identification, has set up a kind of new phase place storage recognition methods, and it is simple in structure, and cost is lower, is a kind of competitive system in optical storage and the relevant identification field.Utilize the present invention's record and reproduced 30 width of cloth images in the same small size in photorefractive material, by relevant method it is discerned, accuracy rate is 100%.
Description of drawings:
Fig. 1 is the structural representation of Anaclasis variant holographic cylindrical lens phase multiplexing storage recognition system and the flow chart of optical transmission.
Embodiment:
Embodiment one: the Anaclasis variant holographic cylindrical lens phase multiplexing storage of present embodiment is achieved in that a with relative identifying method, the light beam of ejaculation from laser 1 is expanded with first fourier lense 3 by spatial light filter 2 restraints into the bigger directional light of area, directional light carries out beam splitting through beam splitter 4, is divided into the flashlight on the transmitted light path that is positioned at beam splitter 4 and is positioned at reference light on the reflected light path of beam splitter 4; B, reference light change after the directions through rotatable cylindrical lens 8 through first speculum 7, and 8 pairs of reference lighies of cylindrical lens carry out phase code, and the reference light after second fourier lense 9 will be encoded converges in the Anaclasis variant 5; After c, flashlight changed direction through second speculum 12, uniform plane wave behind the 4th fourier lense 15, formed the Fourier transform frequency spectrum through being loaded information after the spatial light modulator 14 in Anaclasis variant 5; The interference of in Anaclasis variant 5, meeting of d, flashlight and reference light, organizator phase grating in Anaclasis variant 5, thus realize the record of hologram image; E, be rotating shaft rotation cylindrical lens 8 with the reference light, change the phase place of reference light, thereby realize the phase bit address that different holograms is corresponding different.Reference light in the present embodiment and flashlight are used first shutter 6 and second shutter, 13 control switchs respectively, and this method not only can realize memory function, also can realize representational role and relevant recognition function.The process of the flashlight of described reproduction Anaclasis variant 5 stored is: by second shutter, 13 shutdown signal light, utilize reference light to read volume hologram, thereby read output signal light, flashlight utilizes after by the 5th fourier lense 16 second charge coupled device 12 to receive then; Identification signal only is not that the process of the information of Anaclasis variant 5 stored is: close reference light by first shutter 6, utilize flashlight to read reference light, have only when flashlight is the flashlight that has been recorded in the Anaclasis variant 5, corresponding reference light in first charge coupled device 11 is just the strongest, thereby whether definite flashlight is canned data light in the Anaclasis variant 5.
Embodiment two: the Anaclasis variant holographic cylindrical lens phase multiplexing storage of present embodiment and recognition system are by the laser 1 that is positioned at successively on the same main optical path, spatial light filter 2, first fourier lense 3 and beam splitter 4, by first electronic shutter 6 on the reflected light path that is positioned at beam splitter 4 successively, first speculum 7, rotatable cylindrical lens 8, second fourier lense 9, the device of the transmission reference light that the 3rd fourier lense 10 and first charge coupled device 11 are formed is by second speculum 12 on the transmitted light path that is positioned at beam splitter 4 successively, second electronic shutter 13, spatial light modulator 14, the 4th fourier lense 15, the device and the Anaclasis variant 5 of the transmission signals light that the 5th fourier lense 16 and second charge coupled device 17 are formed are formed.Anaclasis variant 5 is positioned over the intersection of the reference beam and the signal beams that the 4th fourier lense 15 is exported of 9 outputs of second fourier lense, and device as shown in Figure 1.In order to increase storage density, Anaclasis variant 5 should be placed on the position of reference light cross section minimum, before the flashlight of the 4th fourier lense 15 output can focus on Anaclasis variant 5, after the Anaclasis variant 5 or among the Anaclasis variant 5, this can decide according to the character and the specific requirement of material.Native system can adopt the laser of any wavelength that can produce photorefractive effect as light source.Storage medium be for producing any material of photorefractive effect, comprises organicly and inorganic, and its size is asked according to specific product and decided.Angle between reference light and the flashlight is decided by concrete material.Light intensity is also decided by material.
Operation principle: the light beam that penetrates from laser 1 is expanded with first fourier lense 3 by spatial light filter 2 restraints into the bigger directional light of area, and directional light carries out beam splitting through beam splitter 4 (half-reflecting half mirror), is divided into flashlight and reference light.Here utilize two shutters to come the switch of control signal light and reference light.Flashlight and reference light change direction through two speculums again.Reference light is through carrying respective phase information after the cylindrical lens 8, through being compressed into the very little light beam in cross section behind second fourier lense 9.Flashlight is realized Fourier transform through being loaded information after the spatial light modulator 14 through the 4th fourier lense 15.Flashlight and reference light be relevant hologram recorded in Anaclasis variant 5, and the reproduction process is to come shutdown signal light by shutter, utilizes reference light to read volume hologram, thereby read output signal light utilizes CCD (charge coupled device) to come acknowledge(ment) signal light then.Since the phase place difference of reference light during cylindrical lens 8 different rotation angle in the reference path, and in readout, to satisfy Bragg condition, so can be used for multiplexing and relevant identification.
Except the foregoing description can be realized goal of the invention of the present invention; other utilize the rotation cylindrical lens to change the phase place of reference light; thereby realize the phase bit address that different holograms is corresponding different, the technical scheme that reaches the purpose of phase code all belongs to protection scope of the present invention.
Embodiment three: experimental provision as shown in Figure 1, adopt He-Ne laser 1 to make light source (wavelength is 632.8 nanometers) in the experiment, storage medium (Anaclasis variant 5) is the lithium columbate crystal of doping zinc and iron, doping content is: the molar concentration of zinc is 3%, the weight concentration of iron is 0.03%, and it is of a size of 1.49 * 1.00 * 0.37cm
3In the reference path, rotatable cylindrical lens 8 is used for reference light is carried out phase code, and the reference light after second fourier lense 9 will be encoded converges in the crystal.In the flashlight light path,, behind the 4th fourier lense 15, in crystal, form its Fourier transform frequency spectrum with uniform plane wave irradiation spatial light modulator 14.The angle of two-beam is 36 °, and light intensity is respectively 80mW/cm
2And 50mW/cm
2The focal length of cylindrical lens 8 is 400 millimeters, and the focal length of first and third, four, five fourier lenses is 300 millimeters, and the focal length of second fourier lense is 150 millimeters, and crystal is positioned over preceding 5 millimeters of the 5th fourier lense focus.Cylindrical lens is the rotating shaft rotation with the reference light, whenever deposits piece image, and the anglec of rotation of cylindrical lens 8 is 6 °, and we write down and have reproduced 30 width of cloth images, have verified the feasibility of relevant identification.The anglec of rotation of cylindrical lens 8 number of document image is as required selected, and for example, the anglec of rotation of cylindrical lens 8 is 15 °, can write down 12 width of cloth images.
Embodiment four: what present embodiment and embodiment three were different is that crystal can change the lithium columbate crystal of doping iron in the test.The weight ratio of iron is 0.03～0.07%, and light source adopts semiconductor laser (wavelength is 532 nanometers) or argon ion laser (wavelength is 488 nanometers), and other conditions are with embodiment three.Present embodiment can obtain the result identical with embodiment three.
Claims (7)
1, Anaclasis variant holographic phase multiplexing storage and relative identifying method, it is characterized in that it is achieved in that a, the light beam that penetrates from laser (1) is expanded with first fourier lense (3) quilt by spatial light filter (2) restraints into the bigger directional light of area, directional light carries out beam splitting through beam splitter (4), is divided into the flashlight on the transmitted light path that is positioned at beam splitter (4) and is positioned at reference light on the reflected light path of beam splitter (4); B, reference light change after the direction through rotatable cylindrical lens (8) through first speculum (7), and cylindrical lens (8) carries out phase code to reference light, and the reference light after second fourier lense (9) will be encoded converges in the Anaclasis variant (5); After c, flashlight changed direction through second speculum (12), uniform plane wave was loaded information afterwards through spatial light modulator (14), behind the 4th fourier lense (15), formed the Fourier transform frequency spectrum in Anaclasis variant (5); The interference of in Anaclasis variant (5), meeting of d, flashlight and reference light, the organizator phase grating, thus realize the record of hologram image; E, be rotating shaft rotation cylindrical lens (8) with the reference light, and then change the phase place of reference light, thereby realize the phase bit address that different holograms is corresponding different; The process of the signal of f, reproduction Anaclasis variant (5) stored is: by second shutter (13) shutdown signal light, utilize reference light to read volume hologram, thereby read output signal light, flashlight utilizes second charge coupled device (17) received signal light after by the 5th fourier lense (16) then; G, identification signal only are not that the process of the information of Anaclasis variant (5) stored is: close reference light by first shutter (6), utilize flashlight to read reference light, have only when flashlight is the flashlight that has been recorded in the Anaclasis variant (5), corresponding reference light in first charge coupled device (11) is just the strongest, thereby whether definite flashlight is canned data in the Anaclasis variant (5).
2, Anaclasis variant holographic phase multiplexing storage according to claim 1 and relative identifying method is characterized in that laser (1) is the laser that can produce any wavelength of photorefractive effect.
3, Anaclasis variant holographic phase multiplexing storage according to claim 1 and relative identifying method is characterized in that Anaclasis variant (5) is for producing any materials of photorefractive effect.
4, according to claim 1 or 3 described Anaclasis variant holographic phase multiplexing storage and relative identifying methods, it is characterized in that the lithium columbate crystal of Anaclasis variant (5) for doping zinc and iron, wherein the molar concentration of zinc is 3%, the weight concentration of iron is 0.03%, and crystalline size is 1.49 * 1.00 * 0.37cm
3
5, according to claim 1 or 3 described Anaclasis variant holographic phase multiplexing storage and relative identifying methods, it is characterized in that Anaclasis variant (5) is the lithium columbate crystal of doping iron, the weight ratio of iron is 0.03～0.07%.
6, Anaclasis variant holographic phase multiplexing storage and relevant recognition system, it comprises the laser (1) that is positioned at successively on the same main optical path, spatial light filter (2), first fourier lense (3) and beam splitter (4), the device of transmission signals light, the device of transmission reference light, Anaclasis variant (5), the device that it is characterized in that described transmission reference light is successively by first electronic shutter (6) on the reflected light path that is positioned at beam splitter (4), first speculum (7), rotatable cylindrical lens (8), second fourier lense (9), the 3rd fourier lense (10), first charge coupled device (11) is formed, the device of transmission signals light is successively by second speculum (12) on the transmitted light path that is positioned at beam splitter (4), second electronic shutter (13), spatial light modulator (14), the 4th fourier lense (15), the 5th fourier lense (16), second charge coupled device (17) is formed, and Anaclasis variant (5) is positioned at the intersection of the reference beam and the signal beams that the 4th fourier lense (15) is exported of second fourier lense (9) output.
7, Anaclasis variant holographic phase multiplexing storage according to claim 6 and relevant recognition system is characterized in that Anaclasis variant (5) is placed on the position of the reference beam cross section minimum of second fourier lense (9) output.
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| CN101710828B (en) * | 2009-08-24 | 2013-07-24 | 清华大学 | Orthogonal random phase coding technology and application thereof in volume hologram memories |
| CN105319936B (en) * | 2015-12-02 | 2018-03-13 | 哈尔滨工业大学 | A kind of three- dimensional panoramic show method based on volume holographicstorage technology |
| CN105809109B (en) * | 2016-02-24 | 2019-01-25 | 塔里木大学 | A kind of jujube quality quick nondestructive recognition methods based on qualitative characteristics holography relational storage technique |
| CN112947023B (en) * | 2021-02-03 | 2022-06-21 | 昆明理工大学 | Optical scanning holographic three-dimensional object real-time identification system and method |
| CN113325683B (en) * | 2021-05-11 | 2023-01-06 | 昆明理工大学 | Off-axis scanning holographic three-dimensional target real-time joint transformation recognition system and method |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11242424A (en) * | 1997-11-12 | 1999-09-07 | Lucent Technol Inc | System and method for holographic storage device using holographic optical element |
| JP2000268380A (en) * | 1999-03-16 | 2000-09-29 | Fuji Xerox Co Ltd | Method and device for optical recording, and method and device for optical reproducing |
| CN1299507A (en) * | 1998-02-27 | 2001-06-13 | 光技术企业公司 | Method and apparatus for optical information, method and apparatus for reproducing optical information, apparatus for recording/reproducing optical information, and optical information recording mediu |
| WO2002054114A2 (en) * | 2000-12-04 | 2002-07-11 | California Institute Of Technology | Tunable holographic drop filter with quasi phase-conjugate fiber coupling |
| CN1380569A (en) * | 2002-05-13 | 2002-11-20 | 厦门大学 | Optical device capable of making encryption on pixel hologram by using Fourier transformation technique |
| CN1542569A (en) * | 2003-11-07 | 2004-11-03 | 中国科学院上海光学精密机械研究所 | Digital holographic double-exposure phase difference amplifying device |
| CN1571033A (en) * | 2004-05-09 | 2005-01-26 | 中国科学院上海光学精密机械研究所 | Confocal reflection page holographic optical disk storage device |
| WO2005029202A1 (en) * | 2003-09-24 | 2005-03-31 | Tdk Corporation | Holographic recording method, device thereof, and holographic recording/reproduction device |
-
2005
- 2005-06-07 CN CNB2005100100693A patent/CN100346645C/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11242424A (en) * | 1997-11-12 | 1999-09-07 | Lucent Technol Inc | System and method for holographic storage device using holographic optical element |
| CN1299507A (en) * | 1998-02-27 | 2001-06-13 | 光技术企业公司 | Method and apparatus for optical information, method and apparatus for reproducing optical information, apparatus for recording/reproducing optical information, and optical information recording mediu |
| JP2000268380A (en) * | 1999-03-16 | 2000-09-29 | Fuji Xerox Co Ltd | Method and device for optical recording, and method and device for optical reproducing |
| WO2002054114A2 (en) * | 2000-12-04 | 2002-07-11 | California Institute Of Technology | Tunable holographic drop filter with quasi phase-conjugate fiber coupling |
| CN1380569A (en) * | 2002-05-13 | 2002-11-20 | 厦门大学 | Optical device capable of making encryption on pixel hologram by using Fourier transformation technique |
| WO2005029202A1 (en) * | 2003-09-24 | 2005-03-31 | Tdk Corporation | Holographic recording method, device thereof, and holographic recording/reproduction device |
| CN1542569A (en) * | 2003-11-07 | 2004-11-03 | 中国科学院上海光学精密机械研究所 | Digital holographic double-exposure phase difference amplifying device |
| CN1571033A (en) * | 2004-05-09 | 2005-01-26 | 中国科学院上海光学精密机械研究所 | Confocal reflection page holographic optical disk storage device |
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