CN104616670A - Coaxial holography storage device and method - Google Patents

Coaxial holography storage device and method Download PDF

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Publication number
CN104616670A
CN104616670A CN201510003105.7A CN201510003105A CN104616670A CN 104616670 A CN104616670 A CN 104616670A CN 201510003105 A CN201510003105 A CN 201510003105A CN 104616670 A CN104616670 A CN 104616670A
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storage media
coaxial holography
holography storage
coaxial
temperature
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CN201510003105.7A
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Chinese (zh)
Inventor
孙庆成
余业纬
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Spring Foundation of NCTU
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Spring Foundation of NCTU
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Priority to CN201510003105.7A priority Critical patent/CN104616670A/en
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    • 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
    • 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
    • G11B7/125—Optical beam sources therefor, e.g. laser control circuitry specially adapted for optical storage devices; Modulators, e.g. means for controlling the size or intensity of optical spots or optical traces
    • G11B7/128—Modulators
    • 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
    • G11B7/1353—Diffractive elements, e.g. holograms or gratings
    • 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
    • G11B7/1372—Lenses

Abstract

The invention relates to a coaxial holography storage device and method. By the aid of the method, the coaxial holography storage media temperature can be controlled, so that the temperature of the coaxial holography storage media during writing in is 5 DEG C to 50 DEG C higher than that during reading.

Description

Coaxial holography storage device and method thereof
Technical field
The invention relates to a kind of storage device, and relate to a kind of coaxial holography (CollinearHolographic) storage device and method thereof especially.
Background technology
Holograph storing technology is developed so far, and have passed through the research boom of the another ripple of a ripple in history.But although numerous researcher drops into countless painstaking effort, holograph storing technology cannot be developed into all the time can commercial technology.
The characteristic of coaxial holography stocking system is that reference light and flashlight are along same optical axis direction front transfer, and focused on by same object lens and disc carries out interference write, this system because of have configuration simple, can compatible with traditional optical Storage Media, reference light is shorter, lower for the requirement of laser people having the same aspiration and interest length with the optical path difference of flashlight, preferably displacement selectivity, preferably wavelength tolerance, preferably to tilt the characteristics such as tolerance, high storage capacity and high transmission rates, is considered to one of important storing technology of the next generation.
Summary of the invention
The object of the present invention is to provide a kind of coaxial holography storage device and coaxial holography storage method, it can overcome the negative effect that reflective gratings causes.
A kind of coaxial holography storage method is provided according to an aspect of the present invention, (should be appreciated that, wherein mentioned step, except chatting its order person bright especially to comprise the following step, all can adjust its tandem according to actual needs, even can perform simultaneously or partly simultaneously):
(1) data are write in coaxial holography Storage Media; And
(2) when writing, by the temperature increase of coaxial holography Storage Media to predetermined temperature, this predetermined temperature is normal temperature height about 5 DEG C ~ 50 DEG C comparatively.
A kind of coaxial holography storage method is provided according to a further aspect of the invention, (should be appreciated that, wherein mentioned step, except chatting its order person bright especially to comprise the following step, all can adjust its tandem according to actual needs, even can perform simultaneously or partly simultaneously):
(1) data are write in coaxial holography Storage Media;
(2) data are read out in coaxial holography Storage Media; And
(3) temperature of coaxial holography Storage Media is controlled, the temperature height about 5 DEG C ~ 50 DEG C when the temperature of coaxial holography Storage Media when writing comparatively is read.
There is provided a kind of coaxial holography storage device according to another aspect of the invention, comprise writing station and heating device.In use, data can write in coaxial holography Storage Media by writing station.Heating device then can when writing, and by the temperature increase of coaxial holography Storage Media to predetermined temperature, this predetermined temperature is normal temperature height about 5 DEG C ~ 50 DEG C comparatively.
A kind of coaxial holography storage device is provided according to a further aspect of the present invention, comprises writing station, reading device and attemperating unit.In use, data can write in coaxial holography Storage Media by writing station.Data can read out by reading device in coaxial holography Storage Media.Attemperating unit then can control the temperature of coaxial holography Storage Media, the temperature height about 5 DEG C ~ 50 DEG C when the temperature of coaxial holography Storage Media when writing comparatively is read.
Accompanying drawing explanation
Fig. 1 illustrates the diagrammatic cross-section of coaxial holography Storage Media in time writing according to an embodiment of the present invention.
Fig. 2 illustrates the equivalent model schematic diagram of penetration grating in time writing of Fig. 1.
Fig. 3 illustrates the equivalent model schematic diagram of penetration grating in time reading of Fig. 1.
Fig. 4 illustrates the equivalent model schematic diagram of reflective gratings in time writing of Fig. 1.
Fig. 5 illustrates the equivalent model schematic diagram of reflective gratings in time reading of Fig. 1.
Fig. 6 illustrates the functional block diagram of the coaxial holography storage device according to an embodiment of the present invention.
Fig. 7 illustrates reference light used in an embodiment of the present invention.
Fig. 8 illustrates in an embodiment of the present invention, the diffracted signal intensity variation with temperature that reflective gratings produces.
Embodiment
Disclose multiple embodiment of the present invention below with reference to accompanying drawing, as clearly stated, the details in many practices will be explained in the following description.But should be appreciated that, the details in these practices is not applied to limit the present invention.That is, in some embodiments of the present invention, the details in these practices is non-essential.In addition, for simplifying for the purpose of accompanying drawing, some existing usual structures and element are illustrated in the mode simply illustrated in the accompanying drawings.
Fig. 1 illustrates the diagrammatic cross-section of coaxial holography Storage Media 100 in time writing according to an embodiment of the present invention.As shown in the figure, the coaxial holography Storage Media 100 of present embodiment comprises reflection horizon 110 and recording layer 120.Recording layer 120 is positioned on reflection horizon 110.
When writing, user is by spatial light modulator (Spatial Light Modulator; SLM) modulation signal light 200 and reference light 300, and focus on reflection horizon 110 through lens 400.Now, flashlight 200 can be interfered mutually with reference light 300, and interference fringe is recorded in recording layer 120.
As Fig. 1 illustrate, due to the effect in reflection horizon 110, by existence two kinds of gratings in recording layer 120, one is penetration grating 500, and another kind is then reflective gratings 600.Specifically, penetration grating 500 comprises the grating that incident flashlight 210 is set up with incident reference light 310, and the grating that reflected signal light 220 is set up with reflected reference light 320.On the other hand, reflective gratings 600 comprises the grating that incident flashlight 210 is set up with reflected reference light 320, and the grating that reflected signal light 220 is set up with incident reference light 310.These two kinds of gratings represent two kinds of distinct characteristics.
Fig. 2 illustrates the equivalent model schematic diagram of penetration grating 500 in time writing of Fig. 1.In time writing, flashlight 200 and reference light 300 that spatial light modulator produces are imaged in the front focal plane of lens 400 in the lump, and (Jiao of lens 400 is long f), flashlight 200 and reference light 300 will transmit along same optical axis, and scioptics 400 focus on coaxial holography Storage Media 100, make flashlight 200 and reference light 300 produce interference fringe, be recorded in coaxial holography Storage Media 100.
Fig. 3 illustrates the equivalent model schematic diagram of penetration grating 500 in time reading of Fig. 1.In time reading, the reading light 350 that the optical field distribution that spatial light modulator produces is identical with reference light 300 is imaged in the front focal plane of lens 400, and (Jiao of lens 400 is long f), focuses on coaxial holography Storage Media 100 after making to read light 350 scioptics 400.Read light 350 and will produce diffracted signal 250 by after coaxial holography Storage Media 100, after these diffracted signal 250 scioptics 400, by the front focal plane that images in lens 400, (Jiao of lens 400 is long f), forms the optical field distribution identical with flashlight 200.User can utilize image capture unit to capture this diffracted signal 250, to read in coaxial holography Storage Media 100 stored data (that is, the interference fringe that flashlight 200 and reference light 300 produce).
Fig. 4 illustrates the equivalent model schematic diagram of reflective gratings 600 in time writing of Fig. 1.In time writing, flashlight 200 and reference light 300 will inject coaxial holography Storage Media 100 along same optical axis but oppositely, and produce interference fringe in coaxial holography Storage Media 100.
Fig. 5 illustrates the equivalent model schematic diagram of reflective gratings 600 in time reading of Fig. 1.In time reading, reading light 350 identical with reference light 300 for optical field distribution can be imaged in the front focal plane of lens 400 by spatial light modulator, and (Jiao of lens 400 is long f), focuses on coaxial holography Storage Media 100 after making to read light 350 scioptics 400.Read light 350 and will produce diffracted signal 250 by after coaxial holography Storage Media 100, by the front focal plane that images in lens 400, (Jiao of lens 400 is long f), forms the optical field distribution identical with flashlight 200 back through after lens 400 for this diffracted signal 250.Similarly, user can utilize image capture unit to capture this diffracted signal 250, to read in coaxial holography Storage Media 100 stored data (that is, the interference fringe that flashlight 200 and reference light 300 produce).
When penetration grating 500 exists with reflective gratings 600 simultaneously, the diffracted signal 250 that penetration grating 500 and reflective gratings 600 produce will produce constructive or destruction interference, and this will cause diffracted signal 250 even to drop to close to 0 along with reading temperature variation concuss.Therefore, if reflective gratings 600 can be eliminated, the temperature tolerance and the system stability that promote coaxial holography stocking system will be contributed to.
In view of this, inventor is after hammer away, deriving the paraxial approximate solution of coaxial holography stocking system, and according to this derivation result, thinking the temperature difference of coaxial holography Storage Media 100 when writing and when reading that have its source in of reflective gratings 600 problem.Therefore, below describe and based on this derivation result, the technical scheme eliminating reflective gratings 600 will be proposed.
The defocusing effect caused when supposing refraction index changing is compensated by displacement coaxial holography Storage Media 100, (specifically, when writing and read, coaxial holography Storage Media 100 will move along with refraction index changing, the equivalent back focal plane of lens 400 is still positioned on the reflection horizon 110 of coaxial holography Storage Media 100), the paraxial approximate solution that present inventor releases is shown below:
U CCD ( M λ M x M f ξ , M λ M y M r η ) = L M z ( λf ) 2
e jk 4 f M f M λ U p ( M x M λ M f ( ξ 2 - ξ ) , M y M λ M f ( η 2 - η ) ) U r * ( ξ 2 - ξ 1 , η 2 - η 1 ) U s ( - ξ 1 , - η 1 ) sin c ( - L 2 M z λ f 2 ( M z - M λ M x 2 ) ξ 2 2 - 2 ξ 2 ( M z ξ 1 - M λ M x 2 ξ ) ( M z - M λ M y 2 ) η 2 2 - 2 η 2 ( M z η 1 - M λ M y 2 η ) ) +
∫ ∫ ∫ ∫ e jk 4 f U p * ( M λ M x M f ( ξ 2 - ξ ) , M λ M y M f ( η 2 - η ) ) U r ( ξ 2 - ξ 1 , η 2 - η 1 ) U s ( - ξ 1 , - η 1 ) sin c L M z λ ( 2 M λ - 2 M z ) + L 2 M z λ f 2 2 ξ 2 ( M λ M x 2 ξ - M z ξ 1 ) + 2 η 2 ( M λ M y 2 η - M z η 1 ) + ξ 2 2 ( M z - M λ M x 2 ) + η 2 2 ( M z - M λ M y 2 ) + 2 ( M z ξ 1 2 - M λ M x 2 ξ 2 ) + 2 ( M z η 1 2 - M λ M y 2 η 2 ) d ξ 1 d η 1 d ξ 2 d η 2
Wherein each parameter is defined as follows:
(1) after thermal deformation, the refractive index of the medium of recording layer 120 becomes M ndoubly, the equivalent focal length of lens 400 becomes f/M f, then M under near-axial condition f=1/M n;
(2) wavelength of light in the medium of recording layer 120 is made to be M λλ, and the wavelength that light 350 is read in definition is M pλ, then M λ=M p/ M n.
(3) 1/M is made x, 1/M yand 1/M zfor the caloric deformation rate of grating respectively on x, y, z three directions of write, if the grating before thermal deformation is distributed as G 0(u, v, Δ z), then grating distribution G (u, v, Δ z) after thermal deformation is G 0(M xu,M yv,M zΔ z);
(4) λ represents wavelength;
(5) k represents wave number (wave number);
(6) f represents Jiao's length of lens 400;
(7) △ z represents the distance of misalignment lens 400 back focal plane of coaxial holography Storage Media 100;
(8) u and v is the side direction coordinate of coaxial holography Storage Media 100;
(9) U ifor before incoming wave that spatial light modulator produces;
(10) U ffor U ifu's formula conversion (Fourier transform);
(11) U s, U rwith U prepresent the flashlight 200 on lens 400 front focal plane, reference light 300 and the optical field distribution reading light 350 respectively; And
(12) L is the twice of the thickness of coaxial holography Storage Media 100.
Above paraxial approximate solution seems complicated, but states system physical characteristic very clearly, is described below:
(1) the diffracted signal 250 of representative distortion.Diffracted signal 250 after distortion reduces at ξ direction Linear doubly, in η direction, Linear reduces doubly.
(2) have two braces in integration type, wherein first braces represents the light field of the diffracted signal 250 that penetration grating 500 produces, and second braces represents the light field of the diffracted signal 250 that reflective gratings 600 produces.
(3) there is a Sinc function in the light field of diffracted signal 250 that reflective gratings 600 produces, there is a variable in this function because the thickness L/2 of coaxial holography Storage Media 100 is much larger than wavelength X, therefore this existence has extremely low thermal deformation tolerance by allowing reflective gratings 600, make coaxial holography Storage Media 100 slight heat be out of shape the diffracted signal 250 that reflective gratings 600 will be produced and reduce to zero, the diffracted signal 250 of only remaining penetration grating 500 generation.
Therefore, inventor proposes a kind of method reducing the diffracted signal 250 that reflective gratings 600 produces based on above discovery.
According to an embodiment of the present invention, a kind of coaxial holography storage method comprises the following step and (should be appreciated that, step mentioned in the present embodiment, except chatting its order person bright especially, all can adjust its tandem according to actual needs, even can perform simultaneously or partly simultaneously):
(1) data are write in coaxial holography Storage Media 100;
(2) data are read out in coaxial holography Storage Media 100; And
(3) temperature of coaxial holography Storage Media 100 is controlled, the temperature height about 5 DEG C ~ 50 DEG C when the temperature of coaxial holography Storage Media when writing comparatively is read.
That is, user deliberately can control the temperature difference of coaxial holography Storage Media 100 when writing and when reading, and makes this temperature difference between about 5 DEG C ~ 50 DEG C, to reduce the diffracted signal 250 that reflective gratings 600 produces.
Because user can read coaxial holography Storage Media 100 mostly under the environment of normal temperature, therefore in one or more embodiment of the present invention, above-mentioned step (3) can be:
(3.1) when writing, by the temperature increase of coaxial holography Storage Media 100 to predetermined temperature, this predetermined temperature is normal temperature height about 5 DEG C ~ 50 DEG C comparatively.
Should be appreciated that, above-described " normal temperature " one word should be interpreted as: " not deliberately heating or cooling general temperature." if normal temperature is defined as 25 DEG C, then above-mentioned predetermined temperature is about 30 DEG C ~ 75 DEG C.In practice, predetermined temperature can be set as about 45 DEG C ~ 75 DEG C by user.
In present embodiment and follow-uply relevant to describe, " about " in order to modify any can the quantity of slight variations, but this slight variations can't change its essence.For example, " predetermined temperature is normal temperature height about 5 DEG C ~ 50 DEG C comparatively ", this one describe except represent predetermined temperature really comparatively normal temperature high 5 DEG C ~ 50 DEG C except, as long as the diffracted signal 250 that reflective gratings 600 produces can be reduced, temperature difference between predetermined temperature and normal temperature also can be slightly less than 5 DEG C, or slightly larger than 50 DEG C.
Another technology aspect of the present invention is apply the coaxial holography storage device of above-mentioned coaxial holography storage method.This technology contents is illustrated below by graphic for collocation.
Fig. 6 illustrates the functional block diagram of the coaxial holography storage device according to an embodiment of the present invention.As shown in the figure, a kind of coaxial holography storage device comprises writing station 700, reading device 800 and attemperating unit 900.In use, writing station 700 is in order to write data in coaxial holography Storage Media 100.Reading device 800 is in order to read out data in coaxial holography Storage Media 100.Attemperating unit 900 in order to control the temperature of coaxial holography Storage Media 100, make coaxial holography Storage Media write time temperature comparatively read time temperature height about 5 DEG C ~ 50 DEG C.
Above-mentioned writing station 700 comprises spatial light modulator 750 and lens 400.When writing, spatial light modulator 750 can provide reference light and flashlight, and allows reference light and flashlight advance along same optical axis.Lens 400 can focus on coaxial holography Storage Media 100 with reference to light and flashlight, reference light and flashlight are interfered mutually, and multiple interference fringe is recorded in coaxial holography Storage Media 100.The detailed start of writing station 700 has been stated clearly in Fig. 2, Fig. 4 and related text thereof describe, and at this, it is no longer repeated.
Above-mentioned reading device 800 comprises spatial light modulator 750, lens 400 and image capture unit 850.When reading, the reading light that spatial light modulator 750 can provide optical field distribution identical with reference light.Reading light can be focused on coaxial holography Storage Media 100 by lens 400.Read light by diffracted signal being produced after coaxial holography Storage Media 100.User can utilize image capture unit 850 to capture this diffracted signal, to read data stored in coaxial holography Storage Media 100.The detailed start of reading device 800 has been stated clearly in Fig. 3, Fig. 5 and related text thereof describe, and at this, it is no longer repeated.
Similarly, because user can read coaxial holography Storage Media 100 mostly under the environment of normal temperature, therefore in one or more embodiment of the present invention, above-mentioned attemperating unit 900 can be a heating device 950.This heating device 950 can when writing, by the temperature increase of coaxial holography Storage Media 100 to comparatively normal temperature height about 5 DEG C ~ 50 DEG C.
Should be appreciated that, above-described attemperating unit 900 is only illustration, and is not used to limit the present invention.In another embodiment of the present invention, attemperating unit 900 can be a refrigeratory.The temperature of coaxial holography Storage Media when reading, can be reduced to comparatively normal temperature low about 5 DEG C ~ 50 DEG C by this refrigeratory.Or in other embodiment of the present invention, attemperating unit 900 also can be the combination of above-mentioned heating device 950 and refrigeratory.
Below will disclose the multiple analog result of the present invention, and coaxial holography storage device and the method thereof of the above-mentioned embodiment of the present invention will be described by this, there is required physical characteristics really.Should be appreciated that, in the following description, the parameter mentioned in the above-described embodiment will it is no longer repeated, only just further need not define person to be supplemented, and conjunction is first chatted bright.
With in Imitating, flashlight is the pointolite on initial point, wavelength is 408nm, Jiao of lens is long is 4mm, the thickness of coaxial holography Storage Media is 0.5mm, the refractive index of coaxial holography Storage Media is 1.5, in spatial light modulator, the length of side of each pixel is 13.68 μm, sum of all pixels in spatial light modulator is 321x321, reference light does not carry out any modulation (as shown in Figure 7), the internal diameter of reference light and external diameter are respectively 71.4% and 93.8% of spatial light modulator length, in spatial light modulator, the fill factor, curve factor (fill factor) of each pixel is 100%.
After simulating according to above parameter, obtain the result that Fig. 8 illustrates, wherein Fig. 8 illustrates the diffracted signal intensity variation with temperature that reflective gratings produces.
Although the present invention discloses as above with embodiment; but itself and be not used to limit the present invention; anyly be familiar with this operator; without departing from the spirit and scope of the present invention; when making various equivalent change or replacement, therefore protection scope of the present invention is when being as the criterion of defining depending on accompanying the application's right.

Claims (10)

1. a coaxial holography storage method, is characterized in that, comprises: data write in a coaxial holography Storage Media; And when writing, by temperature increase to predetermined temperature of this coaxial holography Storage Media, wherein this predetermined temperature comparatively normal temperature height about 5 DEG C ~ 50 DEG C.
2. coaxial holography storage method according to claim 1, it is characterized in that, this predetermined temperature is about 30 DEG C ~ 75 DEG C.
3. coaxial holography storage method according to claim 1, it is characterized in that, this predetermined temperature is about 45 DEG C ~ 75 DEG C.
4. a coaxial holography storage method, is characterized in that, comprises: data write in a coaxial holography Storage Media; These data are read out in this coaxial holography Storage Media; And control the temperature of this coaxial holography Storage Media, the temperature height about 5 DEG C ~ 50 DEG C when the temperature of this coaxial holography Storage Media when writing comparatively is read.
5. coaxial holography storage method according to claim 4, it is characterized in that, the temperature controlling this coaxial holography Storage Media comprises: when writing, by the temperature increase of this coaxial holography Storage Media to about 30 DEG C ~ 75 DEG C.
6. coaxial holography storage method according to claim 4, it is characterized in that, the temperature controlling this coaxial holography Storage Media comprises: when writing, by the temperature increase of this coaxial holography Storage Media to about 45 DEG C ~ 75 DEG C.
7. a coaxial holography storage device, is characterized in that, comprises: a writing station, in order to data to be write in a coaxial holography Storage Media; And a heating device, in order to when writing, by temperature increase to predetermined temperature of this coaxial holography Storage Media, wherein this predetermined temperature comparatively normal temperature height about 5 DEG C ~ 50 DEG C.
8. coaxial holography storage device according to claim 7, it is characterized in that, this writing station comprises: a spatial light modulator, in order to provide a reference light and a flashlight, and this reference light and this flashlight is advanced along same optical axis; And lens, in order to this reference light and this flashlight are focused on this coaxial holography Storage Media, this reference light and this flashlight are interfered mutually, and multiple interference fringe is recorded in this coaxial holography Storage Media.
9. a coaxial holography storage device, is characterized in that, comprises: a writing station, in order to data to be write in a coaxial holography Storage Media; One reading device, in order to read out these data in this coaxial holography Storage Media; And an attemperating unit, in order to control the temperature of this coaxial holography Storage Media, the temperature height about 5 DEG C ~ 50 DEG C when the temperature of this coaxial holography Storage Media when writing comparatively is read.
10. coaxial holography storage device according to claim 9, it is characterized in that, this writing station comprises:
One spatial light modulator, in order to provide a reference light and a flashlight, and makes this reference light and this flashlight advance along same optical axis; And lens, in order to this reference light and this flashlight are focused on this coaxial holography Storage Media, this reference light and this flashlight are interfered mutually, and multiple interference fringe is recorded in this coaxial holography Storage Media.
CN201510003105.7A 2010-04-07 2010-04-07 Coaxial holography storage device and method Pending CN104616670A (en)

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Citations (3)

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Publication number Priority date Publication date Assignee Title
JP2007257800A (en) * 2006-03-24 2007-10-04 Fujifilm Corp Optical recording method and optical reproduction method, and optical recorder and optical reproducer
US20080088896A1 (en) * 2006-10-11 2008-04-17 Sony Corporation Hologram recording apparatus, hologram recording medium and hologram recording method
TW200921655A (en) * 2007-11-05 2009-05-16 Cmc Magnetics Corp A holographic information recording and reproducing apparatus for the same

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007257800A (en) * 2006-03-24 2007-10-04 Fujifilm Corp Optical recording method and optical reproduction method, and optical recorder and optical reproducer
US20080088896A1 (en) * 2006-10-11 2008-04-17 Sony Corporation Hologram recording apparatus, hologram recording medium and hologram recording method
TW200921655A (en) * 2007-11-05 2009-05-16 Cmc Magnetics Corp A holographic information recording and reproducing apparatus for the same

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