CN1707639A - Holographic data recording apparatus and method - Google Patents
Holographic data recording apparatus and method Download PDFInfo
- Publication number
- CN1707639A CN1707639A CNA2005100057617A CN200510005761A CN1707639A CN 1707639 A CN1707639 A CN 1707639A CN A2005100057617 A CNA2005100057617 A CN A2005100057617A CN 200510005761 A CN200510005761 A CN 200510005761A CN 1707639 A CN1707639 A CN 1707639A
- Authority
- CN
- China
- Prior art keywords
- optical body
- holographic media
- reference beam
- holographic
- radiated
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims description 40
- 230000003287 optical effect Effects 0.000 claims abstract description 151
- 230000005540 biological transmission Effects 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims 1
- 238000000926 separation method Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000002452 interceptive effect Effects 0.000 abstract description 2
- 230000001678 irradiating effect Effects 0.000 abstract 1
- 238000000059 patterning Methods 0.000 abstract 1
- 230000010287 polarization Effects 0.000 description 13
- 241001269238 Data Species 0.000 description 5
- 230000004044 response Effects 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 2
- 230000003760 hair shine Effects 0.000 description 2
- 230000000644 propagated effect Effects 0.000 description 2
- 230000001902 propagating effect Effects 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 239000004606 Fillers/Extenders Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000002999 depolarising effect Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000011514 reflex Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
- G11B7/0065—Recording, reproducing or erasing by using optical interference patterns, e.g. holograms
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
- G03H1/04—Processes or apparatus for producing holograms
- G03H1/0465—Particular recording light; Beam shape or geometry
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
- G03H1/26—Processes or apparatus specially adapted to produce multiple sub- holograms or to obtain images from them, e.g. multicolour technique
- G03H1/2645—Multiplexing processes, e.g. aperture, shift, or wavefront multiplexing
- G03H1/265—Angle multiplexing; Multichannel holograms
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
- G11B7/10—Interchangeable mountings, e.g. for replacement of head without readjustment including interchangeable electrical adjuster boards
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
- G11B7/1362—Mirrors
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
- G11B7/1395—Beam splitters or combiners
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/2403—Layers; Shape, structure or physical properties thereof
- G11B7/24035—Recording layers
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H2223/00—Optical components
- G03H2223/24—Reflector; Mirror
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- General Physics & Mathematics (AREA)
- Holo Graphy (AREA)
Abstract
A holographic data recording apparatus includes: a signal beam patterning unit for irradiating a signal beam onto a holographic medium, the signal beam including a data pattern to be recorded; a cylindrical optical body including a cylindrical reflective surface, by which a first and a second reference beams alternatively incident thereto at incident angles are reflected toward the holographic medium, alternatively; and an incident angle control unit for controlling the incident angles of the first and the second reference beams incident on the cylindrical optical body, wherein the data pattern is recorded on the holographic medium by interfering the signal beam with the first and the second reference beams on the holographic medium. The holographic data recording apparatus do not require the replacement of the conventional conical mirrors while recording a plurality of data on a holographic medium, thereby increasing the recording speed and reducing the manufacturing cost thereof.
Description
Invention field
The present invention relates to holographic data recording apparatus and method; Relate in particular to and utilize the column optical body,, can on holographic media, write down the holographic data recording apparatus and the method for several holographic datas by angular multiplexed.
Background of invention
Conventional holographic memory system adopts (page-by-page) storage means page by page usually.Input equipment such as SLM (spatial light modulator) shows the data that will write down with two-dimensional array form (being called one page), and is used for recovering (retrieve) recorded data such as the detector array of ccd video camera when reading.Also propose other structure, wherein adopting by turn, record replaces method page by page.But all there is so common shortcoming in all these systems, and promptly they need write down the independent hologram of enormous quantity, reach its peak capacity so that be full of storer.Utilize the typical page of megabit size array need write down a hundreds of thousands hologram page, to reach 100GB or bigger capacity to (page-oriented) system.Even utilize the hologram exposure time of Millisecond, fill the 100GB level required summary journal time of storer, even if be not a few hours, also be easy to reach dozens of minutes at least.Therefore, developed the holographic ROM system having of another kind of routine, wherein be used to produce the required time of 100GB level capacity disk can be reduced in one minute, and may reach several seconds the order of magnitude.
Fig. 1 schematically shows the view that is used in the conventional method of dish-type holographic media identifying recording layer.As shown in fig. 1, data mask 48 is placed on the holographic media 50 as optical data carrier, and conical mirror 32 is placed under the holographic media 50.For at holographic media 50 identifying recording layers, position pattern (bit pattern) downward radiation of signal beams process data mask 48 is to the upper surface of holographic media 50, reference beam after by conical mirror 32 reflections, is radiated on the lower surface of holographic media 50 simultaneously.Signal beams and reference beam are interfered on holographic media 50, thus according to position pattern recording holographic data on holographic media 50 of data mask 48.
When use has the conical mirror at different base angles, can be by angular multiplexed several holographic datas (referring to people's such as Ernest Chuang U.S. Patent Application Publication US2003/0161246A1, " holographic disk register system ") that on the same physical space of holographic media 50, write down.
Fig. 2 illustrates conventional holographic ROM system having, and this system comprises light source 10; Shutter 12; Catoptron 14,28,34,40; HWP (half-wave plate) 16,24,36; Spatial filter 18,30,42; Lens 20,44; PBS (polarized light beam splitter) 22; Polarizer 26,38; Conical mirror 32; Data mask 48; With holographic media 50.
The laser beam of light source 10 emission fixed wave length, for example, described wavelength is 532nm.When at holographic media 50 identifying recording layers, only have a kind of laser beam of linear polarization type, for example be the laser beam of P-polarization or S-polarization, to incide on the catoptron 14 through shutter 12, this moment, shutter 12 was opened so that laser beam is therefrom passed through.Catoptron 14 reflexes to HWP 16 with laser beam.HWP 16 makes the polarization rotation θ angle (being preferably 45 °) of laser beam.Then, the postrotational laser beam of polarization is sent into spatial filter 18, the noise that the laser beam that this wave filter is used for rotating except that depolarizing comprises.Then, make the postrotational laser beam incident of polarization (provide) to lens 20, these lens are used to make the beam sizes of this laser beam to expand a preliminary dimension to.Afterwards, the laser beam incident behind the expansion bundle is to PBS 22.
PBS 22 is used for along the transmission of S1 path, for example, and horizontal polarization laser beam, i.e. P-light beam, and along the reflection of S2 path, for example, the vertical polarization laser beam, be the S polarized light bundle, wherein, described PBS makes by depositing two kinds of materials with different refractivity repeatedly at least.Like this, PBS 22 will expand the bundle after laser beam be divided into transmission laser bundle (being called reference beam hereinafter) and the reflection lasering beam (being called signal beams hereinafter) that has different polarization respectively.
Catoptron 34 reflected signal light beams, for example this signal beams has the S-polarization.Fan She signal beams incides catoptron 40 through HWP 36 and polarizer 38 in succession then.Because HWP 36 can make the polarization rotation θ ' degree of signal beams, polarizer 38 be used for only making P-polarization signal light beam be able to by, so HWP 36 and polarizer 38 can be by changing the amount that angle θ ' regulates the P-polarization signal light beam that arrives catoptron 40.Then, by catoptron 40 P-polarization signal light beam is reflected to spatial filter 42, this spatial filter is used to remove the spatial noise of signal beams, and makes its Gaussian beam be able to therefrom transmission.Then, the signal beams of Gaussian incides lens 44 fully, and these lens are used for expanding the beam sizes of signal beams to a preliminary dimension.Afterwards, the signal beams that expands after restrainting projects on the holographic media 50 through data mask 48.Be used to show that the data mask 48 of the Data Styles that will write down plays input equipment, for example effect of spatial light modulator (SLM).
Simultaneously, reference beam is delivered to catoptron 28 through HWP 24 and polarizer 26 in succession.Because HWP 24 can be with the polarization of reference beam rotation θ " degree, and polarizer 26 be used for only making P-polarization reference light beam be able to by, so HWP 24 and polarizer 26 can " be regulated the amount of the P-polarization reference light beam of arrival catoptron 28 by changing θ.Therefore, the polarization of reference beam is identical with the polarization of signal beams.Towards spatial filter 30 reflections, this spatial filter is used to remove the spatial noise of reference beam to catoptron 28, and makes the therefrom transmission of its Gaussian beam with P-polarization reference light beam then.Then, the reference beam of Gaussian beam projects conical mirror 32 (this conical mirror 32 is the circular cones with rounded bottom surface, and has default base angle between the rounded bottom surface and the conical surface) fully, and this conical mirror is fixed by the support (not shown).This conical mirror 32 reflects reference beam towards holographic media 50.The incident angle of reference beam on holographic media 50 of reflection determined by the base angle of conical mirror 32.
When in above-mentioned holographic data recording apparatus, using when having the conical mirror at different base angles, can by angular multiplexed in the same physical space of holographic media 50 the recording holographic data.In other words, in holographic data recording apparatus, use the base angle to be different from another conical mirror at the base angle of conical mirror 32, replace conical mirror 32, the incident angle that reference beam is radiated on the holographic media 50 changes, thereby makes reference beam and signal beams produce new interferogram.Like this, can on holographic media 50, write down new holographic data by angular multiplexed.
But, there is such problem in conventional holographic data recording apparatus, promptly for reference beam is reflected towards the dish-type holographic media with required incident angle, need to utilize have the conical mirror at specific base angle, wherein this specific base angle can provide required incident angle.Like this, for by angular multiplexed on holographic media several holographic datas of record, the quantity of required conical mirror must be identical with the quantity of required reference beam incident angle, thereby increased the cost of holographic data recording apparatus.
And changing each conical mirror is difficulty and complicated process, thereby has reduced writing speed.
Summary of the invention
Therefore, the purpose of this invention is to provide, by angular multiplexed, can in the same physical space of holographic media, write down the holographic data recording apparatus and the method for several holographic datas, wherein, by only utilizing a column optical body to change the incident angle of reference beam, thereby improve holographic data-recording speed, and reduced its cost.
According to a first aspect of the present invention, a kind of holographic data recording apparatus is provided, comprising: signal beams composition unit, be used for signal beams is radiated holographic media, this signal beams comprises Data Styles to be recorded; The column optical body comprises the column reflecting surface, by this column optical body first and second reference beams that alternately incide on it with each incident angle is alternately reflected towards holographic media; The incident angle control module is used to control first and second reference beams and incides incident angle on this column optical body, the wherein mutual interference on holographic media by the signal beams and first and second reference beams, and on holographic media this Data Styles of record.
According to a second aspect of the present invention, a kind of holographic data recording apparatus is provided, comprising: signal beams composition unit, be used for signal beams is radiated holographic media, this signal beams comprises Data Styles to be recorded; The half-cone beam generation unit, first and second reference beams that are used for inciding on it change half-cone beam into, this half-cone beam all has semi-circular cross-section at its each end, and on the central shaft that is centered close to holographic media of semi-circular cross-section, alternately be radiated first and second reference beams on the holographic media then; And incident angle control module, be used to control first and second reference beams and be radiated incident angle on the half-cone beam generation unit, wherein, interfere mutually on holographic media by making the signal beams and first and second reference beams, and on holographic media, write down this Data Styles.
According to a third aspect of the present invention, a kind of holographic data-recording method is provided, be used for by signal beams and reference beam with Data Styles are interfered mutually, and this Data Styles is recorded on the holographic media, may further comprise the steps: first and second reference beams alternately are radiated on the column optical body with column reflecting surface, by this column optical body first and second reference beams are alternately reflected towards this holographic media, write down this Data Styles by the signal beams and first and second reference beams are interfered mutually thus on holographic media; Be radiated incident angle on this column optical body by controlling first and second reference beams, change first and second reference beams and incide incident angle on the holographic media, on holographic media, write down new Data Styles thus stackablely.
According to a fourth aspect of the present invention, a kind of holographic data-recording method is provided, may further comprise the steps: the reference beam that light source is sent is divided into first reference beam and second reference beam; With first and second reference beams alternately to be radiated on this optical body about axisymmetric first symmetric angle in the center of optical body; Reflect this first and second reference beam by this optical body,,, alternately be radiated on the holographic media with about axisymmetric second symmetric angle in the center of optical body thus with this first and second reference beam; And the signal beams that makes first and second reference beams and comprise Data Styles on it is interfered on holographic media mutually, thus at holographic media identifying recording layer pattern.
According to a fifth aspect of the present invention, a kind of holographic data-recording method is provided, may further comprise the steps: the reference beam that light source is sent is divided into N strip reference beam; This a little reference beam alternately is radiated on the optical body, thereby this a little reference beam is guided into the central shaft of this optical body; Reflect this a little reference beam by this optical body, make this a little reference beam thus alternately to be radiated on the holographic media about the axisymmetric predetermined incident angle in this optical body center; And the signal beams that makes this a little reference beam and comprise Data Styles on it is interfered on holographic media mutually, and at holographic media identifying recording layer pattern, wherein N is a natural number thus.
According to a sixth aspect of the present invention, a kind of holographic data recording apparatus is provided, comprising: data mask, be used for signal beams is radiated holographic media, this signal beams comprises Data Styles to be recorded; The semicolumn optical body, it comprises the semicolumn reflecting surface, by this optical body the reference beam that incides on it is reflected towards holographic media; And control module, be used to rotate this data mask and this holographic media, control reference beam thus by the reflection of semicolumn reflecting surface, this reference beam alternately is radiated first and second recording areas of this holographic media, wherein by making signal beams and reference beam write down this Data Styles interfering mutually on the holographic media on holographic media.
According to a seventh aspect of the present invention, a kind of holographic data-recording method is provided, may further comprise the steps: the laser beam that light source is sent is divided into signal beams and reference beam; This signal beams is radiated on the upper surface of holographic media, simultaneously reference beam is radiated on the lower surface of this holographic media after the reflecting surface reflection by the semicolumn optical body, thus in the first record area recording holographic data of holographic media; Make data mask and holographic media Rotate 180 °; This signal beams is radiated on the upper surface of this holographic media, and simultaneously, reference beam is radiated on the lower surface of holographic media after the reflection of the reflecting surface by the semicolumn optical body, thus in the second record area recording holographic data of holographic media.
The accompanying drawing summary
According to the description of the preferred embodiment that provides below in conjunction with accompanying drawing, above-mentioned and other purposes of the present invention and feature will be more readily apparent from, wherein:
Fig. 1 schematically shows the view of conventional holographic data-recording method;
Fig. 2 shows the structural drawing that is used to illustrate conventional holographic data recording apparatus;
Fig. 3 schematically shows the holographic data-recording method according to the present invention's first preferred embodiment;
Fig. 4 has provided the view that is used to illustrate according to the light path of the incident beam of the column optical body of the present invention's first preferred embodiment and folded light beam;
Fig. 5 has provided and has been used to illustrate according to the present invention's first preferred embodiment, at the view of the reflecting surface place of column optical body beam reflection;
Fig. 6 shows the structure according to the holographic data recording apparatus of the present invention's first preferred embodiment;
Fig. 7 schematically shows the view according to the holographic data-recording method of the present invention's second preferred embodiment;
Fig. 8 A and 8B represent the view according to the light path of the incident beam of the column optical body of the present invention's second preferred embodiment and folded light beam;
Fig. 9 represents the structure according to the holographic data recording apparatus of the present invention's second preferred embodiment;
Figure 10 schematically shows the view according to the holographic data-recording method of the present invention's the 3rd preferred embodiment;
Figure 11 represents the structure according to the holographic data recording apparatus of the present invention's the 3rd preferred embodiment.
DESCRIPTION OF THE PREFERRED
＜the first preferred embodiment 〉
Fig. 3 is the holographic data-recording method that schematically shows according to the present invention's first preferred embodiment, wherein with Fig. 1 in the identical parts that occur represent with identical Reference numeral.Data mask 48 places on the holographic media 50, and the signal beams that this data mask is used for having Data Styles (data pattern) shines holographic media 50.In addition, column optical body 102 places under the holographic media 50, and the reflecting surface of this optical body covers 360 ° of angular regions, and is made of cylindrical mirror 102a and 102b.As shown in Figure 4, the focal axis A of cylindrical mirror 102a and 102b places on the central shaft of holographic media 50, wherein cylindrical mirror 102a and 102b have by two cylindrical mirror 102a and 102b in conjunction with and the reflecting surface focal axis that forms.
Signal beams is radiated on the upper surface of holographic media 50 through the position pattern 49 of data mask 48.Here, if first reference beam is radiated on the column optical body 102 at a predetermined angle, column optical body 102a reflects first reference beam towards holographic media 50 so.Because by 102 reflections of column optical body, just looking like this folded light beam, the optical reflectance property of column optical body 102, the parallel incident beam that projects column optical body 102 send from the imaginary axis light source of the focal axis A that is positioned at column optical body 102a.Therefore, consider the plan view of observing from holographic media 50, first reference beam is to give off in 180 ° of angular regions of the central shaft of holographic media 50.Here, first reference beam that is radiated holographic media 50 has the half-cone cross section.First reference beam all has semicircle optical cross-section at its each end, the central shaft that is centered close to holographic media 50 of this semicircle optical cross-section.Therefore, when according to the contact interface between column optical body 102a and the column optical body 102b, when the recording areas of holographic media 50 is divided into first record area and second record area, first reference beam and signal beams are interfered at the first record area of holographic media 50, thus the recording holographic data in response to the position pattern of data mask 48.
Then, when stoping first reference beam to be radiated on the column optical body 102, second reference beam, along with the direction of propagation of first reference beam that incides column optical body 102 direction about the contact interface symmetry, be radiated on the column optical body 102.Then, make second reference beam towards holographic media 50 reflection by column optical body 102b, this reflection direction with towards the direction of propagation of first reference beam of holographic media 50 reflections about the contact interface symmetry.Second reference beam is radiated on the holographic media 50 in 180 ° of angular regions with respect to focal axis A, and second reference beam that is radiated holographic media 50 has the half-cone cross section.Second reference beam all has semicircle optical cross-section at its each end, the central shaft that is centered close to holographic media 50 of this semicircle optical cross-section.Therefore, second reference beam and signal beams are interfered at the second record area of holographic media 50, thus the recording holographic data in response to the position pattern of data mask 48.
Therefore, if alternately being radiated the incident angle of first reference beam on the column optical body 102 and second reference beam changes, be radiated first reference beam on the holographic media 50 and the incident angle of second reference beam so and also change, thus can by angular multiplexed with new holographic data stack be recorded on the holographic media 50.
As mentioned above, alternately first reference beam and second reference beam are radiated on the column optical body 102, because when first reference beam and second reference beam are radiated on the column optical body 102 simultaneously, on the contact interface between column optical body 102a and the column optical body 102b, can produce the light beam that disperses, as shown in Figure 5.
As shown in Figure 6, comprise light source 10 according to holographic data recording apparatus of the present invention; Catoptron 14,34,40,106,112,114; Polarized light beam splitter (PBS) 22 and 104; Column optical body 102; Be used to form the rectangular slot 110,118 of rectangular light beam; The first incident angle control module 108; The second incident angle control module 116; Data mask 48; With holographic media 50.In addition, holographic data recording apparatus further comprises shutter 12,230,240; Half-wave plate (HWP) 16,24,35; Spatial filter 18,30,42; Amplifying lens 20,44; With polarizer 26,38.
The laser beam of sending from light source 10 is a linear polarization, for example P-or S-polarization.Carry out beam splitting from the laser beam that light source 10 sends by PBS 22, propagate along two light path S1 and S2 then.Afterwards, the laser beam of the beam splitting of propagating along light path S2 is carried out beam splitting by PBS 104, propagates along two light path S21 and S22 then.
Signal beams by PBS 22 beam splitting is propagated along light path S1, is radiated on the holographic media 50 according to the described same way as of conventional holographic data recording apparatus with Fig. 1 then.
Reference beam by PBS 22 beam splitting is propagated along light path S2, promptly passes HWP 24 successively, polarizer 26, and spatial filter 30, PBS 104.This reference beam is divided into along first reference beam of light path S21 propagation and second reference beam of propagating along light path S22 by PBS 104.
On light path S21, first reference beam can be incided (perhaps stoping it to incide) rectangular slot 110 by opening (perhaps by closing) shutter 230.If first reference beam is transmitted to rectangular slot 110, can make the first circular reference beam change first reference beam of rectangle into by rectangular slot 110 so, first reference beam with rectangular in form incides on the catoptron 106 then.Afterwards, catoptron 106 reflects first reference beam towards column optical body 102.At column optical body 102 places, first reference beam is reflected towards holographic media 50.
On light path S22, second reference beam can be incided (perhaps stoping it to incide) rectangular slot 118 by opening (perhaps by closing) shutter 240.If second reference beam is transmitted to rectangular slot 118, reflect towards rectangular slot 118 by second reference beam of catoptron 112 so circle, make it change rectangular light beam into by rectangular slot 118 then, then second reference beam with rectangular in form incides on the catoptron 114.Afterwards, catoptron 114 reflects second reference beam towards column optical body 102.At column optical body 102 places, second reference beam is reflected towards holographic media 50.
Because control is radiated the signal beams of holographic media 50, first reference beam and second reference beam make it have identical polarization mode, so signal beams and the interference mutually on holographic media 50 of first and second reference beams.For example, when signal beams is the S-polarization, first and second reference beams also must be the S-polarizations so.And, first and second reference beams are on the direction about the contact interface symmetry, be radiated on the column optical body 102 with identical incident angle, reflect towards holographic media 50 with identical reflection angle on by column optical body 102 then about the direction of contact interface symmetry.
With regard to regard to the plan view that is positioned over the column optical body 102 of observing in catoptron 106 on light path S21 and the S22 and 114 places respectively, this column optical body 102 appears to a rectangle.Like this, when making the first and second circular reference beams change first and second reference beams of rectangle into by rectangular slot 110 and 118, the size of each, i.e. width in first and second reference beams of rectangle, must be adjusted into the size that equals column optical body 102, i.e. diameter.If first and second reference beams are not adjusted into the size of column optical body 102, may on holographic media 50, produce the interferogram of undesirable signal and reference beam so.
According to holographic data recording apparatus of the present invention, can be at control catoptron 106 and 114 layout angle and the shutter 230 of opening/closing alternately, in the time of 240, by angular multiplexed in the same physical space of holographic media 50 the new holographic data of record, as shown in Figure 3.In other words, when controlling the layout angle of catoptron 106 and 114, can change the incident angle that is radiated first and second reference beams on the column optical body 102 by the first and second incident angle control modules 108 and 116.Like this, can change reflection angle, thereby also change the incident angle that is radiated first and second reference beams on the holographic media 50 by first and second reference beams of column optical body 102 reflections.Therefore, first and second reference beams and the signal beams that have changed incident angle are interfered on holographic media 50 mutually, pass through the angular multiplexed new interferogram that forms on holographic media 50 thus.In other words, when new signal beams is radiated on the holographic media 50, just adjust the incident angle of first and second reference beams.Must adjust the layout angle of two catoptrons 106 and 114 by the first and second incident angle control modules 108 and 116, so that it is about the contact interface symmetry here.
＜the second preferred embodiment 〉
In above-mentioned first preferred embodiment, column optical body 102 constitutes by two cylindrical mirror 102a and 102b are combined, thereby the focal axis A of column optical body 102 is positioned on the central shaft of holographic media 50.But, two cylindrical mirror 102a and 102b are combined the high machining precision of needs, as shown in Figure 5, if cylindrical mirror 102a and 102b accurately are not bonded to each other, on the contact interface between column optical body 102a and the column optical body 102b, can produce dispersed light beam so.Therefore, in second preferred embodiment, between two cylindrical mirrors that constitute the column optical body, insert the no reflection events plate of fixed thickness, be convenient to the manufacturing of column optical body thus, and prevent that the contact interface place between cylindrical mirror from producing dispersed light beam.
Fig. 7 is the accompanying drawing that schematically shows according to the holographic data-recording method of the present invention's second preferred embodiment, wherein with Fig. 3 in the identical parts that occur represent with identical Reference numeral.Data mask 48 places on the holographic media 50, and the signal beams that this data mask is used for having Data Styles shines holographic media 50.In addition, column optical body 210 places under the holographic media 50, and the reflecting surface of this optical body covers 360 ° of angular regions, and is made of cylindrical mirror 212 and 214.With reference to figure 8A and 8B, by make two cylindrical mirrors 212 and 214 and the no reflection events plate 216 that is inserted into the fixed thickness between this two catoptron combine and constitute column optical body 210, thereby make the focal axis B of cylindrical mirror 212 and the focal axis C of cylindrical mirror 214 have predetermined spacing d.
Signal beams is radiated on the upper surface of holographic media 50 through the position pattern 49 of data mask 48.Here, if when the focal axis B of cylindrical mirror 212 places on the central shaft of holographic media 50, and when stoping the second reference beam radiation, first reference beam is radiated on the cylindrical mirror 212 at a predetermined angle, by cylindrical mirror 212 first reference beam is reflected towards holographic media 50 so, shown in Fig. 8 A.Because by 102 reflections of column optical body, just looking like this folded light beam, the optical reflectance property of column optical body 102, the parallel incident beam that projects column optical body 102 send from the imaginary axis light source of the focal axis B that is positioned at cylindrical mirror 212.
Therefore, with regard to regard to holographic media 50 observed planimetric maps, first reference beam is to give off in 180 ° of angular regions of the central shaft of holographic media 50.Here, first reference beam that is radiated holographic media 50 has the half-cone cross section.First reference beam all has semicircle optical cross-section at its each end, and the central shaft that is centered close to holographic media 50 of this semicircle optical cross-section is as described in first preferred embodiment of the present invention.Therefore, when bisector plane (with the perpendicular face of the straight line that is connected focal axis B and C) according to no reflection events plate 216, when the recording areas of holographic media 50 is divided into first record area and second record area, first reference beam and signal beams are interfered mutually at the first record area of holographic media 50, thus in response to data mask 48 the position pattern with the recording holographic data.
Then, by making the position moving interval d of column optical body 210, the position of the focal axis C of cylindrical mirror 214 becomes on the central shaft that places holographic media 50.Afterwards, when stoping first reference beam to be radiated on the cylindrical mirror 212, second reference beam is along being radiated on the cylindrical mirror 214 about the direction of the bisector plane symmetry of reflecting surface 216 (with identical incident angle) not with the direction of propagation of first reference beam that incides cylindrical mirror 212.Then, shown in Fig. 8 B, by cylindrical mirror 214 make second reference beam along with towards the direction of propagation of first reference beam of holographic media 50 reflection about (with identical reflection angle) on the direction of the bisector plane symmetry of reflecting plate 216 not towards holographic media 50 reflections.Second reference beam is radiated on the holographic media 50 in 180 ° of angular regions with respect to focal axis C, and second reference beam that is radiated holographic media 50 has the half-cone cross section.Second reference beam all has semicircle optical cross-section at its each end, the central shaft that is centered close to holographic media 50 of this semicircle optical cross-section.Therefore, second reference beam and signal beams are interfered at the second record area of holographic media 50, thus in response to the position pattern recording holographic data of data mask 48.
Therefore, thus the focal axis B of control column optical body 210 and the position of C make on its central shaft that alternately places holographic media 50.Specifically, when focal axis B placed on the central shaft of holographic media 50, first reference beam was radiated on the column optical body 210, and when focal axis C placed on the central shaft of holographic media 50, second reference beam was radiated on the column optical body 210.And, if change the incident angle of first reference beam and second reference beam that are radiated holographic media 50, by angular multiplexed new holographic data is recorded on the holographic media 50 with superposeing so.
Fig. 9 illustrates the structural drawing according to the holographic data recording apparatus of the present invention's second preferred embodiment, wherein with Fig. 6 in identical parts represent with identical Reference numeral.Holographic data recording apparatus according to the present invention's second preferred embodiment comprises light source 10; Catoptron 14,28,34,106,112,114; PBS 22 and 104; Column optical body 210; Rectangular slot 110 and 118; First angle controller 108; Second angle controller 116; Be used to control the positioner 220 of the focal axis position of column optical body 210; Data mask 48; With holographic media 50.In addition, the holographic data recording apparatus according to the present invention's second preferred embodiment comprises shutter 12,230,240; HWP 16,24, and 36; Spatial filter 18,30,42; Extender lens 20,44; With polarizer 26,38.
According to the light path S1 in the holographic data recording apparatus of the present invention's second preferred embodiment, the light path S1 of S21 and S22 and the present invention's first preferred embodiment as shown in Fig. 6 and 9, S21 is identical with S22, has therefore omitted the description to it.
In second preferred embodiment of the present invention, the positioner 220 by being used for mobile column optical body 210 positions can place the position of the focal axis of column optical body 210 central shaft of holographic media 50.If the focal axis B of cylindrical mirror 212 is placed on the central shaft of holographic media 50, by opening shutter 230 and closing shutter 240, first reference beam is incided on the column optical body 210 so.But,, by opening shutter 240 and closing shutter 230, second reference beam is incided on the column optical body 210 so if the focal axis C of cylindrical mirror 214 places on the central shaft of holographic media 50.
In addition, when the focal axis B of control column optical body 210 and the position of C, when making on its central shaft that alternately places holographic media 50, first reference beam and second reference beam alternately incide on the column optical body 210.And, incide incident angle on the holographic media 50 if change first and second reference beams, so by angular multiplexed with new holographic data stack be recorded on the holographic media 50.
In addition, be appreciated that, can consider the quantity of light path so if light path is radiated on the whole circumference surface of column optical body many reference beams.Reference beam can be divided into N sub-reference beam.And, be appreciated that if the entire emission face of column optical body forms 360 °, can change the quantity of the catoptron that constitutes the column optical body so.
＜the three preferred embodiment 〉
Figure 10 schematically shows the view according to the holographic data-recording method of the present invention's the 3rd preferred embodiment.As shown in figure 10, data mask 48 places on the holographic media 50, and semicolumn optical body 326 places under the holographic media 50.Because the signal beams that is radiated on the holographic media 50 is identical with the signal beams of first and second preferred embodiments, thereby omit description to this signal beams in the recording operation process.
To be radiated reference beam on the semicolumn optical body 326 towards the first half recording areas reflection of holographic media 50 by semicolumn optical body 326.Here, the focal axis of semicolumn optical body 326 should be positioned on the central shaft of holographic media 50.
Therefore, can interfere with the signal beams that data mask 48 provides by the reference beam of semicolumn optical body 326 reflection, thus can be in the first half recording areas of holographic media 50 the recording holographic data.
Then, data mask 48 and holographic media Rotate 180 ° are wherein carried out the rotation of holographic media 50 by drive shaft motor 328.Afterwards, reference beam and signal beams are interfered, thus can be in the second half recording areas of holographic media 50 the recording holographic data.
Figure 11 illustrates the structure according to the holographic data recording apparatus of the present invention's the 3rd preferred embodiment.As shown in figure 11, holographic data recording apparatus comprises: light source 10; Catoptron 14,28,34,40,322; PBS 22; Semicolumn optical body 326; Data mask 48; Holographic media 50; With control module 250.Because except semicolumn optical body 326, spindle drive motor 328, control module 350, all elements outside the actuator 324 all with first and second preferred embodiments of the present invention in identical, therefore omit detailed description thereof.
By after the rectangular slot 320, the reference beam with round section changes the reference beam with square-section at reference beam.Then, will have the reflecting surface of the reference beam of square-section towards semicolumn optical body 326 by catoptron 322, promptly cylinder partial reflects.Afterwards, semicolumn optical body 326 reflects reference beam towards holographic media 50.Here, the incident angle that reference beam is radiated on the semicolumn optical body 326 is adjusted by catoptron 322, and this catoptron 322 can rotate angularly by the actuator 324 of control module 350 controls.Therefore, can be by the angular multiplexed ground recording holographic data that superpose.
On the first half recording areas after the recording holographic data, control module 350 makes all Rotate 180s ° of data mask 48 and holographic media 50.Afterwards, by semicolumn optical body 326 with reference beam towards holographic media 50 reflection, thereby can be on the second half recording areas the recording holographic data.Here, when data mask 48 and holographic media 50 all during Rotate 180 °, control module 350 is closed shutter 12, stops reference beam and signal beams to be transmitted to holographic media 50 thus.Therefore, can not produce dispersed light beam.In addition, according to the present invention's the 3rd preferred embodiment,, therefore can reduce manufacturing cost because only utilize a reference beam to come the recording holographic data.
As mentioned above, the invention provides holographic data recording apparatus and method, these apparatus and method can be utilized the column optical body, by angular multiplexed, and several holographic datas of record in the same physical space of holographic media.Be different from conventional holographic data recording apparatus and the method for utilizing a plurality of conical mirror, when the many data of record on holographic media, holographic data recording apparatus of the present invention and method do not need to change conical mirror, have improved writing speed thus and have reduced its cost.
Although the present invention is illustrated and describes, one skilled in the art will understand that under the situation that does not deviate from the spirit and scope of the present invention that limit as following claim and can carry out various changes and modification with regard to preferred embodiment.
Claims (40)
1, a kind of holographic data recording apparatus comprises:
Signal beams composition unit is used for signal beams is radiated holographic media, and this signal beams comprises Data Styles to be recorded;
The column optical body comprises the column reflecting surface, makes with incident angle separately by this column optical body and alternately incides first and second reference beams on it alternately towards this holographic media reflection; And
The incident angle control module is used to control the incident angle that incides this first and second reference beam on this column optical body,
Wherein on holographic media, interfere mutually, and on holographic media, write down this Data Styles by the signal beams and first and second reference beams.
2, holographic data recording apparatus according to claim 1, wherein said signal beams composition unit is the data mask with pattern, this pattern is corresponding with the Data Styles that will write down, and described signal beams passes this pattern and is radiated on the described holographic media.
3, holographic data recording apparatus according to claim 1, wherein described first and second reference beams that are radiated then on the described holographic media by described column optical body reflection are the cone-shaped beams that all have round section at its each end, the central shaft that is centered close to holographic media of this round section.
4, device according to claim 1 wherein by alternately opening or closing the shutter on the light path that places described first and second reference beams respectively, and alternately is radiated described first and second reference beams on the described column optical body.
5, device according to claim 1, described first and second reference beams that wherein are radiated on the described column optical body are rectangles.
6, holographic data recording apparatus according to claim 1 further comprises:
The rectangular light beam generation unit is used for described first and second reference beams of circle are changed into the reference beam of rectangle, and described first and second reference beams with rectangle are radiated on the described column optical body then.
7, holographic data recording apparatus according to claim 6, wherein said rectangular light beam generation unit are rectangular slot.
8, holographic data recording apparatus according to claim 1, wherein said column optical body comprises 360 ° of angle reflectings surface, the focal axis of described column optical body places on the central shaft of described holographic media.
9, device according to claim 1, wherein said column optical body is configured to have separately with a plurality of that the cylindrical mirror of focal axis combines, simultaneously the no reflection events plate is inserted wherein, between the focal axis of each cylindrical mirror, have a spacing thus.
10, device according to claim 9 further comprises a position control unit, is used for moving described column optical body, and described each focal axis alternately is positioned on the central shaft of described holographic media.
11, device according to claim 9, wherein said incident angle control module are controlled described first and second reference beams and are radiated on the described column optical body with identical incident angle on about the direction of no reflection events plate symmetry.
12, device according to claim 1 further comprises: the light source that is used for emission of lasering beam; The first light beam separative element is used for this laser beam is divided into described signal beams and described reference beam; The second light beam separative element is used for the described reference beam from the first light beam separation unit incident is divided into first reference beam and second reference beam, and these two reference beams are radiated on the described column optical body by first and second light paths respectively.
13, device according to claim 12, wherein said first light beam separative element or the described second light beam separative element are polarized light beam splitters.
14, device according to claim 1, wherein said incident angle control module comprises: the first incident angle control module is used to control described first reference beam and is radiated incident angle on the described column optical body; The described second incident angle control module is used to control described second reference beam and is radiated incident angle on the described column optical body.
15, device according to claim 14, further comprise: first catoptron, be used for the incident angle that described first reference beam is adjusted with the described first incident angle control module is reflected towards described column optical body, with second catoptron, be used for the incident angle that described second reference beam is adjusted with the described second incident angle control module is reflected towards described column optical body.
16, a kind of holographic data recording apparatus comprises:
Signal beams composition unit is used for signal beams is radiated holographic media, and this signal beams comprises Data Styles to be recorded;
The half-cone beam generation unit, first and second reference beams that are used for inciding on it change the half-cone beam that all has semi-circular cross-section at its each end into, on the central shaft that is centered close to this holographic media of semi-circular cross-section, then first and second reference beams alternately are radiated on this holographic media; And
The incident angle control module is used to control first and second reference beams and is radiated incident angle on this half-cone beam generation unit,
Wherein, interfere mutually on this holographic media by making this signal beams and first and second reference beams, and on this holographic media, write down this Data Styles.
17, device according to claim 16, wherein said half-cone beam generation unit is the column optical body, wherein forms 360 ° of angle reflectings surface by cylindrical mirror.
18, a kind of holographic data-recording method is used for by making signal beams with Data Styles and the mutual interference between the reference beam, and on holographic media this Data Styles of record, comprise step:
First and second reference beams alternately are radiated on the column optical body with column reflecting surface, by this column optical body first and second reference beams are alternately reflected towards this holographic media, thus by this signal beams and first and second reference beams are interfered and the record data pattern on holographic media mutually; And
Be radiated incident angle on this column optical body and change first and second reference beams and incide incident angle on this holographic media, the new Data Styles of stack ground record on this holographic media thus by controlling first and second reference beams.
19, method according to claim 18, wherein the incident angle of described first reference beam and second reference beam each other about the axisymmetric condition in the center of described column optical body under, change these two reference beams and be radiated incident angle on the described column optical body.
20, method according to claim 19, first reference beam and second reference beam that wherein are radiated on the described holographic media are the half-cone beam that all has semi-circular cross-section at its each end, on the central shaft that is centered close to described holographic media of described semi-circular cross-section.
21, a kind of holographic data-recording method may further comprise the steps:
The reference beam that light source is sent is divided into first reference beam and second reference beam;
With first and second reference beams alternately to be radiated on this optical body about axisymmetric first symmetric angle in the center of optical body;
Reflect this first and second reference beam by this optical body, thus with this first and second reference beam alternately to be radiated on the holographic media about axisymmetric second symmetric angle in the center of this optical body; And
Make this first and second reference beam and comprise on it that signal beams of Data Styles interferes on this holographic media, thus at this holographic media identifying recording layer pattern.
22, method according to claim 21, first reference beam and second reference beam that wherein are radiated on the described holographic media are the half-cone beam that all has semi-circular cross-section at its each end, on the central shaft that is centered close to described holographic media of described semi-circular cross-section.
23, method according to claim 21, wherein polarized light beam splitter is used for described reference beam is divided into first reference beam and second reference beam.
24, method according to claim 21 further comprises step: adjust first and second reference beams when each new signal beams incides on the described holographic media and be radiated incident angle on the described optical body.
25, method according to claim 21, wherein said optical body, promptly the column optical body reflects described first reference beam and second reference beam towards described holographic media, wherein constitutes the beam reflection face by cylindrical mirror on described optical body.
26, method according to claim 21 further comprises step: change described first and second reference beams into rectangular light beam by filtering.
27, method according to claim 21, first reference beam and second reference beam that wherein shine on the described holographic media are distributed in 360 ° of angular regions about described column optical body.
28, method according to claim 21 wherein alternately is radiated on the described column optical body by alternately opening or closing described first and second reference beams of fast goalkeeper.
29, a kind of holographic data-recording method comprises step:
The reference beam that light source is sent is divided into N strip reference beam;
Each sub-reference beam alternately is radiated on the optical body, thereby this a little reference beam is guided into the central shaft of this optical body;
Reflect this a little reference beam by this optical body, make this a little reference beam thus alternately to be radiated on the holographic media about the axisymmetric predetermined incident angle in this optical body center;
The signal beams that makes this a little reference beam and comprise Data Styles on it is interfered on holographic media mutually, and at holographic media identifying recording layer pattern, wherein N is a natural number thus.
30, method according to claim 29 further comprises step: described each the sub-reference beam of adjustment is radiated the incident angle on the described optical body when new signal beams incides on the holographic media.
31, a kind of holographic data recording apparatus comprises:
Data mask is used for signal beams is radiated holographic media, and this signal beams comprises Data Styles to be recorded;
The semicolumn optical body comprises, by this semicolumn reflecting surface the reference beam that incides on it is reflected towards holographic media; And
Control module is used to rotate this data mask and holographic media, thereby controls the reference beam that alternately is radiated first and second recording areas of holographic media by this semicolumn reflecting surface reflection thus,
Wherein by this signal beams and this reference beam are interfered on holographic media mutually, and on this holographic media this Data Styles of record.
32, device according to claim 31, the focal axis of wherein said semicolumn optical body is positioned on the central shaft of described holographic media.
33, device according to claim 31 further comprises: catoptron is used to reflect described reference beam, thereby it is radiated on the semicolumn optical body; And actuator, be used to adjust the angle of this catoptron.
34, device according to claim 33, wherein said control module is controlled the driving of described actuator.
35, device according to claim 31, wherein said control module make described data mask and described holographic media Rotate 180 °.
36, device according to claim 31, wherein said control module is adjusted reference beam, make it to be radiated on the first record area of described holographic media, described reference beam and signal beams are interfered, so that recording holographic data on first record area, make described data mask and described holographic media Rotate 180 ° then, adjust described reference beam then, make it to be radiated the second record area of described holographic media, described reference beam and signal beams are interfered, so as on second record area the recording holographic data.
37, device according to claim 36, wherein when described data mask of rotation and described holographic media, described control module stops described signal beams and described reference beam transmission.
38, a kind of holographic data-recording method comprises step:
The laser beam that light source is sent is divided into signal beams and reference beam;
Signal beams is radiated on the upper surface of holographic media, simultaneously reference beam is radiated on the lower surface of holographic media after the reflecting surface reflection by the semicolumn optical body, thus in the first record area recording holographic data of holographic media;
Make data mask and holographic media Rotate 180 °;
Signal beams is radiated on the upper surface of holographic media, simultaneously, reference beam is radiated on the lower surface of holographic media after the reflection of the reflecting surface by the semicolumn optical body, thus in the second record area recording holographic data of holographic media.
39,, wherein when described data mask of rotation and described holographic media, stop described signal beams and described reference beam transmission according to the described method of claim 38.
40,, wherein be radiated incident angle on the described semicolumn optical body by control described reference beam by the angle of actuator driven mirror according to the described method of claim 38.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020040041888 | 2004-06-08 | ||
| KR1020040041888A KR100588940B1 (en) | 2004-06-08 | 2004-06-08 | Holographic data recoding apparatus and method |
| KR1020040061144 | 2004-08-03 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1707639A true CN1707639A (en) | 2005-12-14 |
| CN100353428C CN100353428C (en) | 2007-12-05 |
Family
ID=35581489
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100057617A Expired - Fee Related CN100353428C (en) | 2004-06-08 | 2005-01-25 | Holographic data recording apparatus and method |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR100588940B1 (en) |
| CN (1) | CN100353428C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101178912B (en) * | 2006-11-08 | 2010-09-22 | 大宇电子株式会社 | Optical information processing apparatus and optical information processing method |
| US7843791B2 (en) | 2006-11-08 | 2010-11-30 | Daewoo Electronics Corp. | Optical information processing method and optical information reproducing method using multiplexing schemes capable of improving a density of recorded optical information |
| CN101911188B (en) * | 2007-12-28 | 2012-10-03 | 三星电子株式会社 | Holographic information recording and/or reproducing apparatus |
| CN113589671A (en) * | 2021-07-01 | 2021-11-02 | 四川大学 | Conical surface holographic display method for enlarging vertical field angle |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20090062014A (en) * | 2007-12-12 | 2009-06-17 | 삼성전자주식회사 | Apparatus for recording/reproducing holographic data |
| KR20230084654A (en) * | 2021-12-06 | 2023-06-13 | 한국전자기술연구원 | Holographic printer with vibration-free mechanical shutter |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2548928B2 (en) | 1987-02-06 | 1996-10-30 | 旭光学工業株式会社 | Multi-beam scanning optical device |
| JPH05251311A (en) * | 1992-03-05 | 1993-09-28 | Nikon Corp | Device and method for making exposure using total-reflection hologram |
| US5425016A (en) | 1994-02-28 | 1995-06-13 | Sutker; Hal | Digital laser encoder/recorder/player, utilizing ellipsoidal memory medium |
| US5740148A (en) | 1997-01-07 | 1998-04-14 | Read-Rite Corporation | Stationary optical data storage system using holographic or acousto-optical deflection |
| US6882613B2 (en) * | 2001-06-21 | 2005-04-19 | Hampton University | Cylindrical medium for storing holographic data and methods and apparatus for manipulating data using the cylindrical medium |
| US6721076B2 (en) * | 2001-08-03 | 2004-04-13 | Inphase Technologies, Inc. | System and method for reflective holographic storage with associated multiplexing techniques |
| US6956681B2 (en) * | 2001-08-03 | 2005-10-18 | Inphase Technologies, Inc. | Integrated reading and writing of a hologram with a rotated reference beam polarization |
| JP4099819B2 (en) | 2002-02-07 | 2008-06-11 | ソニー株式会社 | Holographic disc recording system |
| US6697180B1 (en) * | 2002-08-09 | 2004-02-24 | Inphase Technologies, Inc. | Rotation correlation multiplex holography |
| KR100488963B1 (en) * | 2003-03-31 | 2005-05-10 | 주식회사 대우일렉트로닉스 | A ring shape dispersing prism for multi recording in holographic rom system |
| KR100477359B1 (en) * | 2003-04-30 | 2005-03-22 | 주식회사 대우일렉트로닉스 | Holographic rom system |
| KR100536681B1 (en) * | 2003-05-31 | 2005-12-14 | 주식회사 대우일렉트로닉스 | Apparatus for replicating holographic disk |
| KR100536688B1 (en) * | 2003-06-30 | 2005-12-14 | 주식회사 대우일렉트로닉스 | Recoding device and aligner in the holographic random access memory |
| KR100536689B1 (en) * | 2003-06-30 | 2005-12-14 | 주식회사 대우일렉트로닉스 | Holographic rom system |
| KR100601951B1 (en) * | 2004-04-13 | 2006-07-14 | 삼성전자주식회사 | A holographic data recording/reproducing apparatus, and a holographic data recording method |
-
2004
- 2004-06-08 KR KR1020040041888A patent/KR100588940B1/en not_active IP Right Cessation
-
2005
- 2005-01-25 CN CNB2005100057617A patent/CN100353428C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101178912B (en) * | 2006-11-08 | 2010-09-22 | 大宇电子株式会社 | Optical information processing apparatus and optical information processing method |
| US7843791B2 (en) | 2006-11-08 | 2010-11-30 | Daewoo Electronics Corp. | Optical information processing method and optical information reproducing method using multiplexing schemes capable of improving a density of recorded optical information |
| CN101911188B (en) * | 2007-12-28 | 2012-10-03 | 三星电子株式会社 | Holographic information recording and/or reproducing apparatus |
| CN113589671A (en) * | 2021-07-01 | 2021-11-02 | 四川大学 | Conical surface holographic display method for enlarging vertical field angle |
Also Published As
| Publication number | Publication date |
|---|---|
| KR100588940B1 (en) | 2006-06-09 |
| KR20050116854A (en) | 2005-12-13 |
| CN100353428C (en) | 2007-12-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1523584A (en) | Methods for page-wise recording and reading of a holographic ROM medium | |
| CN1540458A (en) | Method and device for recording and reproducing holographic data | |
| CN1707639A (en) | Holographic data recording apparatus and method | |
| JP5816046B2 (en) | A method of storing bit-wise holographic data in parallel using a parallel light source | |
| WO2009051774A1 (en) | Holographic content search engine for rapid information retrieval | |
| JP2007279475A (en) | Hologram recording device and hologram recording method | |
| US7333251B2 (en) | Holographic data recording apparatus and method | |
| CN1183526C (en) | Capatible optical adaptor and regulation method of conducting optical-axis adjustment therein | |
| EP1526517B1 (en) | Apparatus and method for controlling tracking and focusing servo in a holographic digital data storage system | |
| JP6667177B2 (en) | Hologram recording / reproducing method and hologram recording / reproducing apparatus | |
| CN1619664A (en) | Holographic recording and reconstructing apparatus and mask for use therein | |
| JP6553495B2 (en) | Hologram recording / reproducing method and hologram recording / reproducing apparatus | |
| CN1542570A (en) | Apparatus and method for recording digital data on a holographic storage system | |
| CN1244912C (en) | Annular prism glass of holographic read only memory system | |
| CN101562020B (en) | Holographic storage system with reduced noise | |
| CN100343909C (en) | Holographic data recording apparatus and method | |
| CN1542854A (en) | Holographic rom system | |
| JP2007193874A (en) | Optical information recording device and optical information reproducing device | |
| CN1296911C (en) | Holographic rom system including an alignment apparatus for aligning a holographic medium and a mask | |
| US20050007930A1 (en) | Optical information recording apparatus | |
| CN100414620C (en) | Apparatus and method for aligning holographic ROM system | |
| KR100571840B1 (en) | An apparatus for recording/reproducing holographic information | |
| KR100588941B1 (en) | Cylindrical type holographic data recoding apparatus and method for controlling thereof | |
| KR100588959B1 (en) | Recording device for controlling a reference beam of the holographic rom and method therefor | |
| JP2005257885A (en) | Recording or reproducing apparatus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: FENGYE VISION TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: DAEWOO ELECTRONICS CO., LTD. Effective date: 20130422 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20130422 Address after: Ontario Patentee after: Fengye Vision Technology Co., Ltd. Address before: Seoul, South Kerean Patentee before: Daewoo Electronics Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20071205 Termination date: 20150125 |
|
| EXPY | Termination of patent right or utility model |