CN110265066A - Full image storage device and its operating method - Google Patents
Full image storage device and its operating method Download PDFInfo
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- CN110265066A CN110265066A CN201810201207.3A CN201810201207A CN110265066A CN 110265066 A CN110265066 A CN 110265066A CN 201810201207 A CN201810201207 A CN 201810201207A CN 110265066 A CN110265066 A CN 110265066A
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- light
- storage device
- full image
- image storage
- conversion unit
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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
- G11B7/12—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
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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
- G11B7/12—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
- G11B7/1374—Objective lenses
-
- 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
- G11B7/1392—Means for controlling the beam wavefront, e.g. for correction of aberration
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- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Recording Or Reproduction (AREA)
- Holo Graphy (AREA)
Abstract
A kind of full image storage device and its operating method.Full image storage device includes light source module, light guide module and optical conversion unit.Light source module is to provide an at least light beam.Light guide module is directed to storage disk to receive the light beam from light source module, and by the light beam from light source module.Optical conversion unit is optically coupled between light source module and storage disk, the light beam from light source module to be converted into projecting in a manner of pointolite array.Through optical conversion unit, it can make when storing disk in the presence of displacement, the diffraction light of generation has enough intensity, so as to increasing full image storage device to the displacement tolerance of storage disk.
Description
Technical field
The invention relates to a kind of full image storage devices and its operating method.
Background technique
With the development of science and technology, the required storage dosage of electronic record also and then rises.Common storing mode is record
Variation on storage medium surface magnetically or optically, using the foundation as stored data, such as disk or CD-RW discsCD-RW.However, with
Electronic record required storage dosage increase, full figure storage technology development starts to attract attention.
Full figure storing technology is that after generating interference through signal light and reference light, storage medium is written in image data
In (photosensitive material).When reading the data, through irradiating on reference light to storage medium (photosensitive material) again, that is, it can produce shadow
As data.Then, generated image data is read by detector again.However, accommodating storage medium (photosensitive material when reading
Material) disk will likely generate offset, cause reading result will generate distortion.
Summary of the invention
One embodiment of the present invention provides a kind of full image storage device, includes light source module, light guide module and optics
Converting unit, wherein light source module can provide reference light, and reference light provided by light source module can be directed to by light guide module
Store disk.Optical conversion unit be optically coupled to light source module and storage disk between, to by reference light be converted into
The mode of pointolite array projects.Through optical conversion unit, can make when storing disk in the presence of displacement, generated diffraction light
With enough intensity, so as to increasing full image storage device to the displacement tolerance of storage disk.
One embodiment of the present invention provides a kind of full image storage device, which is characterized in that includes light source module, guide-lighting mould
Block and optical conversion unit.Light source module is to provide an at least light beam.Light guide module is to receive from light source module
Light beam, and the light beam from light source module is directed to storage disk.Optical conversion unit is optically coupled to light source module and storage
It deposits between disk, the light beam from light source module to be converted into projecting in a manner of pointolite array.
In some embodiments, optical conversion unit includes grating, and full image storage device also includes microlens array
And object lens.Microlens array is optically coupled between grating and object lens, and object lens are optically coupled to microlens array and storage
Between disk.
In some embodiments, the vertical range between grating and object lens is approximately equal to the focal length of object lens, and object lens and storage
Deposit the focal length that the vertical range between disk is approximately equal to object lens.
In some embodiments, light source module surrounds signal light to provide reference light and signal light, reference light, and micro-
The setting position of lens array and grating corresponds to the optical path of reference light.
In some embodiments, grating has the first opening, and microlens array has the second opening.First opening and the
Two openings are jointly to make signal light pass through grating and microlens array.
In some embodiments, full image storage device also includes the first condenser lens, wherein optical conversion unit optics
It is coupled between the first condenser lens and light guide module, and the first condenser lens is to focus the beam onto optical conversion unit
On.
In some embodiments, optical conversion unit includes grating.
In some embodiments, light beam provided by light source module is reference light, and full figure storage module also inclusion
Mirror, illuminator, the second condenser lens and optical detector.Object lens are optically coupled between light guide module and storage disk.Irradiation
Device is to provide signal light towards object lens.Second condenser lens is optically coupled between storage disk and optical detector.
One embodiment of the present invention provides a kind of mode of operation of full image storage device, comprises the steps of.Ginseng is provided
Light is examined to storing disk.Optical conversion unit is set in the optical path of reference light, so as to convert reference light at pointolite array
Mode towards storage disk projection.It will be removed in the optical path of optical conversion unit self-reference light, and provide and read light to storing dish
Piece, wherein the optical path of reference light and the optical path for reading light are substantially the same.
In some embodiments, setting optical conversion unit in the step in the optical path of reference light include setting grating in
In the optical path of reference light.
Detailed description of the invention
Figure 1A is the configuration schematic diagram that full image storage device is painted according to the first embodiment of this disclosure；
Figure 1B is painted optical conversion unit, microlens array, the first object lens and the configuration signal for storing disk of Figure 1A
Figure；
Fig. 1 C is painted the schematic elevation view of the optical conversion unit of Figure 1B；
Fig. 2A is painted after reference light projects in a manner of point light source of single, the relationship of intensity and position of the storage material when reading
Schematic diagram；
Fig. 2 B is painted after reference light projects in a manner of multi-point source, the relationship of intensity and position of the storage material when reading
Schematic diagram；
Fig. 3 is the configuration schematic diagram that full image storage device is painted according to the second embodiment of this disclosure.
Specific embodiment
It will clearly illustrate spirit of the invention below with attached drawing and detailed description, have in any technical field usual
Skill is after understanding better embodiment of the invention, when can be changed and be modified by the technology of teachings of the present invention,
Without departing from spirit and scope of the invention.
Herein, using the vocabulary of first, second and third etc., be used to describe various elements, component, region,
Layer and/or block be it is understood that.But these elements, component, region, layer and/or block should not be by these terms
It is limited.These vocabulary are only limited to for distinguishing single element, component, region, layer and/or block.Therefore, one hereinafter
First element, component, region, layer and/or block are also referred to as second element, component, region, layer and/or block, without de-
From original idea of the invention.
Figure 1A is looked at, wherein Figure 1A is to be painted full image storage device 100A according to the first embodiment of this disclosure
Configuration schematic diagram.Full image storage device 100A can carry out write-in program and reading program to storage disk 102, wherein journey is written
Sequence is reference light and signal light to be focused on storage disk 102 through object lens to be interfered and store data in it, and read
Program fetch be through reference light in storage disk 102 carry out diffraction and by storage data convert in the inner.In addition, Figure 1A is drawn
Full image storage device 100A be adopt coaxial-type framework, it includes light source modules 110, light guide module 120, optical conversion unit
150, microlens array 154, the first object lens 160 and optical detector 170.
Light source module 110 includes optical transmitting set (not being painted) and spatial light modulator (spatial light
modulator；SLM)112.Optical transmitting set for example can be laser light source, to emit light beam towards spatial light modulator 112,
Then, spatial light modulator 112 is after receiving the light beam from laser light source, modulated light beam, so that light source module 110 can mention
For signal light, reference light or light is read to light guide module 120.The full image storage device 100A that Figure 1A is drawn is to storage disk
102 carry out write-in programs, therefore light source module 110 can provide signal light S and reference light R to light guide module 120, wherein reference light R
Around signal light S.
Light guide module 120 includes the first guiding lens 122, the first polarization spectroscope (polarizing beam
splitter；PBS) the 124, second guiding lens 126, quarter-wave plate 128 and third guide lens 130.Through above-mentioned light
The combination of element is learned, light guide module 120 can pass through the first guiding lens 122 and receive the signal light S provided from light source module 110
And reference light R, and signal light S and reference light R are guided toward optical conversion unit 150 and advanced.
Optical conversion unit 150, microlens array 154 and the first object lens 160 are optically coupled to light guide module 120 and storage
Between disk 102, wherein optical conversion unit 150 is optically coupled between light guide module 120 and microlens array 154.Though figure
The form there are spacing is schematically shown as between the optical conversion unit 150 and microlens array 154 of 1A, however, in other embodiment party
In formula, optical conversion unit 150 can also be close to mutually with microlens array 154.From light guide module 120 toward optical conversion unit
The 150 signal light S to advance and reference light R can sequentially pass through optical conversion unit 150, microlens array 154 and the first object lens
After 160, into storage disk 102.It below will be to optical conversion unit 150, microlens array 154, the first object lens 160 and storage
The relationship deposited between disk 102 does further description.
Figure 1B and Fig. 1 C is please seen again, and wherein Figure 1B is painted the optical conversion unit 150 of Figure 1A, microlens array 154,
One object lens 160 and the configuration schematic diagram for storing disk 102, and the facing for optical conversion unit 150 that Fig. 1 C is painted Figure 1B is shown
It is intended to.Optical conversion unit 150 include grating 152, wherein grating 152 be optically coupled to light guide module 120 (see Figure 1A) with
Between microlens array 154, microlens array 154 is optically coupled between grating 152 and the first object lens 160, and the first object lens
160 are optically coupled between microlens array 154 and storage disk 102, wherein hanging down between grating 152 and the first object lens 160
Straight distance is approximately equal to the focal length F of the first object lens 160, and the vertical range between the first object lens 160 and storage disk 102 is also about etc.
In the focal length F of the first object lens 160.
The setting position of grating 152 and microlens array 154 corresponds to the optical path of reference light R.Specifically, grating 152
There can be the first opening 156A in wherein, microlens array 154 has the second opening 156B in wherein, works as full image storage device
When 100A carries out write-in program to storage disk 102, the first opening 156A and the second opening 156B can be jointly to make
After signal light S passes through grating 152 and microlens array 154, advance toward the first object lens 160.
After reference light R passes through grating 152, reference light R can be converted into the form of pointolite array.Then, when
When reference light R passes through microlens array 154, reference light R first can carry out phase-modulation, and mode by microlens array 154
It is projected to the first object lens 160.Specifically, as shown in Figure 1B, reference light R can be converted into because of grating 152 towards multiple directions
The reference light R ' of projection.That is, in the write-in program that full image storage device 100A carries out storage disk 102, storage
Depositing disk 102 and being referenced the position of light R write-in data can be multiple points.The position of light R write-in data is referenced in storage disk 102
It sets in the case where being multiple points, when being read out program, even if storage disk 102 shifts, because being still able to satisfy
The Bragg condition (Bragg condition) of reference light certain point when record, thus store disk 102 still can produce it is sufficiently strong
The diffraction light of degree, to complete reading program.
Furthermore, it is understood that please seeing Fig. 2A and Fig. 2 B simultaneously.Fig. 2A is painted after reference light projects in a manner of point light source of single, storage
Deposit the relation schematic diagram of intensity and position of the material when reading.Fig. 2 B is painted after reference light projects in a manner of multi-point source, storage
Deposit the relation schematic diagram of intensity and position of the material when reading.In Fig. 2A and Fig. 2 B, horizontal axis is the level in storage material
Coordinate, the longitudinal axis are the intensity of the diffraction light left from storage material, and wherein storage material for example can be storage disk.
In Fig. 2A, since when carrying out write-in program, used reference light is to adopt the mode of point light source of single to write to storage material
Enter, therefore the waveform in reading program in the diffraction light generated in storage material by diffraction only has one, wherein this diffraction
The waveform of light has halfwidth W.During reading program, when generated diffraction light waveform only one when, if storage
The position for depositing material generates offset, then the intensity of generated diffraction light may be to fall within except its halfwidth W, that is to say, that institute
The diffraction light of generation might have the insufficient situation of intensity and occur.
In Fig. 2 B, since when carrying out write-in program, used reference light is to adopt the mode of multi-point source to write to storage material
Enter, thus in reading program in the waveform of the diffraction light generated in storage material by diffraction can be more than one, it is attached in order not to make
Figure is excessively complicated, and the waveform for the diffraction light drawn in Fig. 2 B is two, and wherein the waveform of each diffraction light can have halfwidth
W, distance D between adjacent wave crest, and distance D is less than halfwidth W.During reading program, when generated diffraction light
Waveform when be more than one, even if the position of storage material generates offset, since the waveform of different diffraction light weighs mutually
Repeatedly, therefore the intensity of diffraction light caused by can preventing is fallen in except halfwidth W, so that generated diffraction light can still have enough
Intensity.That is, being converted into projecting in a manner of pointolite array by reference light R through grating 152, full figure storage can be increased
Displacement tolerance of the cryopreservation device 100A to storage disk.
It please return Figure 1A.After full image storage device 100A completes write-in program through grating 152, disk 102 is stored
It is interior to have data be written.When full image storage device 100A to storage disk 102 be read out program when, can first by
It is removed in the optical path of 152 self-reference light R of grating, and is then provided through light source module 110 and read light (not being painted) to storage dish
Piece 102, wherein the optical path of reading light and the optical path of reference light R are substantially the same.Reading light can be from light source module 110 through guide-lighting
Module 120 enter storage disk 102, and read light can storage disk 102 in generate diffraction after become diffraction light, this diffraction
Light can penetrate the guiding of light guide module 120 again, guide lens 130 from third and advance towards optical detector 170, and then detected by light
Device 170 is received and is read out.Since the storage used reference light R when carrying out write-in program of disk 102 is to adopt multiple spot light
The mode in source is written, therefore can make when reading program, even if micro offset, generated diffraction light tool occur for storage disk 102
There is enough intensity, to prevent full image storage device 100A from losing genuine situation to the reading data of storage disk 102.
Please see that Fig. 3, Fig. 3 are to be painted matching for full image storage device 100B according to the second embodiment of this disclosure again
Set schematic diagram.At least one of present embodiment and first embodiment discrepancy are that the full figure of present embodiment stores dress
Setting 100B is to adopt the mode of off-axis system to configure.Full image storage device 100B include light source module 110, the first condenser lens 114,
Light guide module 120, illuminator 144, optical conversion unit 150, the second object lens 162, the second condenser lens 164 and optical detector
170。
Light source module 110 can provide reference light R towards the first condenser lens 114, wherein the first condenser lens 114 is optical coupled
Between light source module 110 and optical conversion unit 150, and the first condenser lens 114 turns reference light R is focused on optics
It changes on unit 150.Optical conversion unit 150 is optically coupled between the first condenser lens 114 and storage disk 102, and optics
Converting unit 150 can be grating, being converted into the reference light R from the first condenser lens 114 with pointolite array
Mode be projected to light guide module 120.
Light guide module 120 includes the 4th guiding lens 132, half wave plate 134, the second polarization spectroscope 136, reflection
Mirror 138, galvanometer the 140, the 5th guide lens 142.Light guide module can pass through the 4th guiding lens 132 and receive from optical transition list
The reference light R of member 150.Reference light R can sequentially pass through the polarization point of half wave plate 134, second from the 4th guiding lens 132
Light microscopic 136, reflecting mirror 138, galvanometer the 140, the 5th guide lens 142, and subsequently enter the second object lens 162.In addition, illuminator
144 can be used to provide signal light S towards the second object lens 162.
Second object lens 162 are optically coupled between light guide module 120 and storage disk 102 and are also optically coupled to illuminator
Between 144 and storage disk 102, therefore, through the second object lens 162, reference light R and signal light S can be led to storage disk
102 generate interference, so as to carrying out full image storage device 100B to the write-in program of storage disk 102.
After full image storage device 100A completes the write-in program to storage disk 102 through optical conversion unit 150, storage
Data be written can be had by depositing in disk 102.Then, when full image storage device 100A is read out journey to storage disk 102
It when sequence, will first can remove in the optical path of 150 self-reference light R of optical conversion unit, and then be provided through light source module 110
Light is read to storage disk 102, wherein the optical path of reading light and the optical path of reference light R can be substantially the same.Reading light can be from light
Source module 110 enters storage disk 102 through light guide module 120, and reading light can be in storage disk 102 after generation diffraction
As diffraction light, this diffraction light can be by the second condenser lens 164, wherein the second condenser lens after leaving storage disk 102
164 are optically coupled between storage disk 102 and optical detector 170, so that the diffraction light by the second condenser lens 164 can court
Optical detector 170 is advanced.As described above, since reference light R being converted into pointolite array through optical conversion unit 150
Mode projects, therefore even if storage disk 102 happens occasionally micro offset in reading program, generated diffraction light can still have
Enough intensity, to prevent full image storage device 100B from losing genuine situation to the reading data of storage disk 102.
The optical path that the above first embodiment and second embodiment are drawn is configured to equivalent light path configuration, rather than practical first
Part relative positional relationship.Also that is, reality between the adjustable element of persond having ordinary knowledge in the technical field of the present invention
Relative positional relationship, alternatively, the quantity of relevant optical can also be increased or decreased.For example, in second embodiment,
The position of changeable optical conversion unit 150 is optically coupled to it between light guide module 120 and storage disk 102.
In conclusion the full image storage device of this disclosure includes light source module, light guide module and optical transition list
Member, wherein light source module can provide reference light, and reference light provided by light source module can be directed to storage dish by light guide module
Piece.Optical conversion unit is optically coupled between light source module and storage disk, being converted into reference light with point light source
The mode of array projects.Through optical conversion unit, even if storage disk happens occasionally micro offset in reading program, produced
Raw diffraction light can still have enough intensity, so as to increasing full image storage device to the displacement tolerance of storage disk.
Although the present invention is disclosed above with embodiment, however, it is not to limit the invention, any to be familiar with this skill
Person, without departing from the spirit and scope of the present invention, when can be used for a variety of modifications and variations, therefore protection scope of the present invention is worked as
Subject to the scope of which is defined in the appended claims.
Claims (10)
1. a kind of full image storage device, characterized by comprising:
One light source module, to provide an at least light beam；
One light guide module is guided to receive the light beam from the light source module, and by the light beam from the light source module
To a storage disk；And
One optical conversion unit is optically coupled between the light source module and the storage disk, will come from the light source module
The light beam be converted into projecting in a manner of pointolite array.
2. full image storage device according to claim 1, which is characterized in that the optical conversion unit includes a grating, and
The full image storage device also includes:
One microlens array；And
One object lens, wherein the microlens array is optically coupled between the grating and the object lens, and the object lens are optically coupled to this
Between microlens array and the storage disk.
3. full image storage device according to claim 2, which is characterized in that the vertical range between the grating and the object lens
Equal to a focal length of the object lens, and the vertical range between the object lens and the storage disk is equal to the focal length of the object lens.
4. full image storage device according to claim 2, which is characterized in that the light source module to provide a reference light and
One signal light, which surrounds the signal light, and the setting position of the microlens array and the grating corresponds to the reference light
Optical path.
5. full image storage device according to claim 2, which is characterized in that the grating has one first opening, this is micro-
Lens array has one second to be open, and first opening is with second opening jointly to make the signal light pass through the grating and be somebody's turn to do
Microlens array.
6. full image storage device according to claim 1, which is characterized in that also include:
One first condenser lens, wherein the optical conversion unit be optically coupled to first condenser lens and the light guide module it
Between, and first condenser lens is to focus on the light beam on the optical conversion unit.
7. full image storage device according to claim 6, which is characterized in that the optical conversion unit includes a grating.
8. full image storage device according to claim 7, which is characterized in that the light beam provided by the light source module is one
Reference light, and the full image storage device also includes:
One object lens are optically coupled between the light guide module and the storage disk；
One illuminator, to provide a signal light towards the object lens；
One second condenser lens；And
One optical detector, wherein second condenser lens is optically coupled between the storage disk and the optical detector.
9. a kind of operating method of full image storage device, characterized by comprising:
A reference light is provided to a storage disk；
One optical conversion unit is set in the optical path of the reference light, so as to the reference light to be converted into the side with pointolite array
Formula is projected towards the storage disk；And
The optical conversion unit is removed from the optical path of the reference light, and provides one and reads light to a storage disk, wherein should
The optical path of reference light is identical as the optical path of the reading light.
10. the operating method of full image storage device according to claim 9, which is characterized in that the optical transition list is arranged
Member includes in the step in the optical path of the reference light:
One grating is set in the optical path of the reference light.
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| CN201810201207.3A CN110265066B (en) | 2018-03-12 | 2018-03-12 | Holographic storage device and operation method thereof |
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| US5515354A (en) * | 1993-12-24 | 1996-05-07 | Sharp Kabushiki Kaisha | Optical pickup |
| CN1223740A (en) * | 1996-09-27 | 1999-07-21 | 三洋电机株式会社 | Optical pickup device and wavelength selective diffraction grating |
| CN101124630A (en) * | 2005-03-02 | 2008-02-13 | 松下电器产业株式会社 | Holographic optical information recording/reproducing device and holographic optical information recording/reproducing method |
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