CN109712649A - Store disk, full figure stocking system and its production method - Google Patents
Store disk, full figure stocking system and its production method Download PDFInfo
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- CN109712649A CN109712649A CN201711012634.9A CN201711012634A CN109712649A CN 109712649 A CN109712649 A CN 109712649A CN 201711012634 A CN201711012634 A CN 201711012634A CN 109712649 A CN109712649 A CN 109712649A
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Abstract
A kind of storage disk, full figure stocking system, with its production method.Full figure stocking system includes full figure light source module, storage disk, light guide module, detector and calculator.Full figure light source module at least reads light to provide servo.Light guide module reads light to receive the servo of full figure light source module offer, and servo reading light guide is led into storage disk, wherein when servo, which reads light, is led to storage disk, servo reads light and generates diffraction in storage disk, and becomes the servo diffraction light left from storage disk.Detector is to received from the servo diffraction light that leaves of storage disk.Calculator is electrically connected to detector, and to be formed by an at least image through servo diffraction light, calculates storage disk in the offset of first direction, wherein first direction is parallel with servo reading Prague degeneracy direction of light.After the offset for calculating storage disk, the reading state that servo reads light can adjust, so as to more accurately reading the information of storage disk.
Description
Technical field
The invention relates to a kind of storage disks (storage disk), full figure stocking system (holographic
Storage system) and its production method.
Background technique
With the development of science and technology, the required storage dosage of electronic document 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 document 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 figure stocking system, includes full figure light source module, storage disk, leaded light
Module, detector and calculator, the servo that full figure light source can provide read light to light guide module, and through the guiding of light guide module and
Inject storage disk.Servo, which reads light, to generate diffraction in storage disk, so as to becoming servo diffraction light and carrying storage
The contraposition information of disk.Then, servo diffraction light penetrates the guiding of light guide module and is received by detector, and is formed to have and be aligned
The image of point.Calculator can be used to the loci through image, calculate Prague degeneracy that storage disk reads light in servo
Offset on the direction (Bragg degeneracy).After the offset for calculating storage disk, it can adjust servo and read light
Reading state, so as to more accurately read storage disk information.
One embodiment of the present invention provides a kind of full figure stocking system, which is characterized in that includes full figure light source module, storage
Deposit disk, light guide module, detector and calculator.Full figure light source module at least reads light to provide servo.Light guide module is used
Light is read to receive the servo of full figure light source module offer, and servo reading light guide is led into storage disk, wherein when servo is read
When light being taken to be led to storage disk, servo reads light and generates diffraction in storage disk, and becomes from what storage disk left and watch
Take diffraction light.Detector is to received from the servo diffraction light that leaves of storage disk.Calculator is electrically connected to detector, is used in combination
To be formed by an at least image through servo diffraction light, storage disk is calculated in the offset of first direction, wherein first party
It is parallel to Prague degeneracy direction of light is read with servo.
In some embodiments, the calculation of calculator substantially meets: y=k*x, wherein y be storage disk in
The offset of first direction, x are the offset of at least loci in image.
In some embodiments, full figure stocking system also includes determining device.Determining device is electrically connected to detector, is used in combination
In the offset direction for being formed by multiple images judgement storage disks in time interval through servo diffraction light.
In some embodiments, full figure light source module is to provide signal light and reference light, and storing disk includes storage
Deposit layer.Storage layer is to record the page info generated by signal light and reference light through interference, and servo reads light and penetrates
Diffraction is generated in storage layer and becomes servo diffraction light.
In some embodiments, storage layer has first area and second area, and first area is to record by signal
The page info that light and reference light are generated through interference, and second area is watched to make servo read light generation diffraction and become
Diffraction light is taken, and second area is covered in first area.
In some embodiments, the first area of storage layer and second area include identical photosensitive material.
In some embodiments, storage layer has grating pattern, and the grating vector (grating of grating pattern
Vector principal direction) is orthogonal with first direction.
In some embodiments, full figure stocking system is collectively formed off axis through full figure light source module and light guide module
(off-axis) system and the one of them of coaxial system.
In some embodiments, it is spherical wave that servo, which reads wavefront form of the light in its parallel Prague degeneracy direction,.
In some embodiments, servo, which reads light, has the first song in the parallel parallel wavefront in its Prague degeneracy direction
Rate r1, and there is torsion r in the wavefront in its orthogonal Prague degeneracy direction2, and first curvature r1> torsion r2≧0。
In some embodiments, full figure stocking system also includes actuator.Actuator is electrically connected to calculator, is used in combination
To read the state of light according to the calculated result of calculator adjustment servo.
In some embodiments, full figure stocking system also includes secondary light source module and auxiliary detector.Secondary light source
Module reads light to provide auxiliary servo, and wherein auxiliary servo reads light and is directed to storage disk through light guide module, and
Diffraction is generated in storage disk, and becomes the auxiliary servo diffraction light left from storage disk.Assist detector auxiliary to receive
Servo diffraction light is helped, and is electrically connected to calculator, wherein calculator is to calculate servo diffraction light and auxiliary servo diffraction light
Fourier space angle, and the position of positioning storage disk according to calculated result.
In some embodiments, full figure stocking system also includes secondary light source module and auxiliary detector.Secondary light source
Module reads light to provide auxiliary servo, and wherein auxiliary servo reads light and is directed to storage disk through light guide module, and
Diffraction is generated in storage disk, and becomes the auxiliary servo diffraction light left from storage disk.Assist detector to receive this
Auxiliary servo diffraction light, and it is electrically connected to calculator, wherein calculator is to calculate servo diffraction light and auxiliary servo diffraction
The fourier space angle of light, and the position of positioning storage disk according to calculated result.
One embodiment of the present invention provides a kind of production method of full figure stocking system, comprises the steps of.Irradiation is watched
The storage layer of reference light and servosignal light to storage disk is taken, and generates interference through reference servo light and servosignal light,
And contraposition information is recorded in storage layer, contraposition information becomes servo through diffraction is generated in storage layer to make servo read light
Diffraction light, wherein storage disk is presented in first direction in image when servo diffraction light is received by detector and becomes image
Offset information, and first direction is parallel with servo reading Prague degeneracy direction of light.Reference light and signal light are irradiated to storage
Layer, and interference is generated through reference light and signal light, and page info is recorded in storage layer.Storage disk is written in calculator
Offset calculating formula, so as to making calculator calculate storage disk in the offset of first direction through image.
In some embodiments, wavefront form of the reference servo light in its parallel Prague degeneracy direction is spherical wave.
In some embodiments, wavefront of the reference servo light in its parallel Prague degeneracy direction has first curvature
r1, and there is torsion r in the wavefront in its orthogonal Prague degeneracy direction2, and first curvature r1> torsion r2≧0。
One embodiment of the present invention provides a kind of storage disk, which is characterized in that includes storage layer.Storage layer has the
One region and second area, wherein first area is to record the page letter generated by signal light and reference light through interference
Breath, and second area becomes servo diffraction light in storage layer generation diffraction to make servo read light and penetrate, wherein working as servo
When diffraction light is received by detector and becomes image, storage disk is presented in the offset information of first direction in image, and first party
It is parallel to Prague degeneracy direction of light is read with servo.
Detailed description of the invention
Fig. 1 is painted the light path schematic diagram of full figure stocking system for first embodiment according to the present invention；
Fig. 2A to Fig. 2 C is painted the side view that storage disk is written for some embodiments according to the present invention respectively
Schematic diagram；
Fig. 2 D is painted the page info of storage disk for some embodiments according to the present invention and aligns the storage of information
The schematic side view of position；
Fig. 3 A and Fig. 3 B is painted the schematic diagram of different images for some embodiments according to the present invention respectively；
Fig. 4 is the relation schematic diagram of the offset of loci and the offset of storage disk；
Fig. 5 is painted the light path schematic diagram of full figure stocking system for second embodiment according to the present invention；
Fig. 6 is painted the light path schematic diagram of full figure stocking system for third embodiment according to the present invention.
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.
Fig. 1 is painted the light path schematic diagram of full figure stocking system 100A for first embodiment according to the present invention.Such as Fig. 1 institute
Show, full figure stocking system 100A includes storage disk 102, full figure light source module 110, light guide module 120, detector 140 and meter
Calculate device 150.In addition, the full figure stocking system 100A that Fig. 1 is drawn can be considered the schematic diagram aligned to storage disk 102.
Full figure 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 full figure light source module 110
It can provide signal light, reference light or servo and read light to light guide module 120.For example, the full figure light source module 110 that Fig. 1 is drawn is
Servo is provided and reads light L to light guide module 120.
Light guide module 120 includes the first lens 121, the first polarization splitting prism (polarizing beam splitter；
PBS) the 122, second lens 123, quarter-wave plate 124, the first object lens 125 and the third lens 126.Through said lens group
Close, light guide module 120 can be used to receive full figure light source module 110 offer light beam, and by light beam be directed to storage disk 102 and
Detector 140.
Storing disk 102 includes storage layer 104 and reflecting layer 105, and storage layer 104 is laminated on reflecting layer 105.Storage
104 permeable photosensitive material of layer are formed, and have grating pattern 106, wherein the grating vector (grating of grating pattern 106
Vector principal direction) is indicated with direction K.Reflecting layer 105 can have with so that the light beam for injecting storage disk 102 reflects
For body, the light beam for injecting storage disk 102 can be after passing through storage layer 104, and self-reflection layer 105 reflects and leaves storage disk
102.In addition, the record of storage layer 104 of storage disk 102 has contraposition information and page info, and align information and page info
It is to be recorded in same layer.Specifically, to visible Fig. 2A of process of storage disk 102 write-in contraposition information and page info
To Fig. 2 C, wherein Fig. 2A to Fig. 2 C is painted respectively for some embodiments according to the present invention and storage disk 102 is written
Schematic side view.In order not to keep attached drawing excessively complicated, the storage disk 102 of Fig. 2A to Fig. 2 C is not painted the grating pattern of Fig. 1
106。
As shown in Figure 2 A, the storage layer 104 for storing disk 102 is laminated on reflecting layer 105, and storage layer 104 is not yet
The state of information is recorded, i.e., the interference not generated through signal light and reference light records information.
As shown in Figure 2 B, irradiation servosignal light S1 and reference servo light R1 and the storage to storage disk 102 be can pass through
Layer 104, so that servosignal light S1 and reference servo light R1 interferes in generation in storage layer 104, to record in storage layer 104
Align information.In addition, reference servo light R1 can be spherical wave in the wavefront form in its parallel Prague degeneracy direction, and servo is joined
Examining wavefront of the light R1 in its parallel Prague degeneracy direction has first curvature r1, and the wave in its orthogonal Prague degeneracy direction
It is preceding that there is torsion r2, wherein first curvature r1> torsion r2≤ 0, so as to increasing Prague matching (Bragg
Matched tolerance).In addition, according to above-mentioned relation formula, as torsion r2When being zero, indicate reference servo light R1 in just
The wavefront for handing over its Prague degeneracy direction is plane wave.
As shown in Figure 2 C, it can pass through the storage layer 104 of project signal light S2 and reference light R2 to storage disk 102, so that
Signal light S2 and reference light R2 records page info in generation interference in storage layer 104, and then in storage layer 104.It is real in part
It applies in mode, the step of storage write-in of disk 102 contraposition information and page info can be carried out simultaneously, alternatively, being also possible to elder generation
Page info is then written in write-in contraposition information again.
Fig. 2 D is painted the page info of storage disk 102 for some embodiments according to the present invention and aligns the storage of information
Deposit the schematic side view of position.In order not to keep attached drawing excessively complicated, the storage disk 102 of Fig. 2 D is not painted the grating pattern of Fig. 1
106.As shown in Figure 2 D, the storage layer 104 for storing disk 102 can have first area A1 and second area A2.First area A1
To recording surface information, and second area A2 is to record contraposition information.The first area A1 and second area A2 of storage layer 104
Comprising identical photosensitive material, and first area A1 covers second area A2, i.e. first area A1 and second area A2 can be mutual
Overlapping.
It please return Fig. 1.Detector 140 is arranged so that light guide module 120 is optically coupled to storage disk 102 and detector
Between 140, and the light beam to be left received from storage disk 102, and detector 140 can pass through the received light beam of institute and be formed
Corresponding image.In addition, detector 140 can be photosensitive coupling element (charge-coupled device；CCD).Calculator
150 are electrically connected to detector 140, and to be formed by image after receiving light beam through detector 140, calculate storage dish
The offset of piece 102, below illustrates concrete example.
After full figure light source module 110, which provides servo, reads light L to light guide module 120, the first lens of light guide module 120
121, which can receive the servo from full figure light source module 110, reads light L, and servo reads light L and sequentially passes through the first polarization spectro rib again
Mirror 122, the second lens 123, quarter-wave plate 124, and subsequently enter the first object lens 125.Through the first object lens 125, servo
Directive storage disk 102 can be directed to by reading light L, and subsequently enter storage disk 102.
After servo, which reads light L, to be directed to inject storage disk 102 through the first object lens 125, servo reads light L can be in storage
The storage layer 104 for depositing disk 102 generates diffraction, and leaves storage disk 102, and servo diffraction light D after becoming servo diffraction light D
The contraposition information that storage disk 102 is recorded can at least be carried.In this regard, servo reads Prague degeneracy (Bragg of light L
Degeneracy) direction is indicated with direction B, and direction B its principal direction (direction K) with the grating vector of grating pattern 106 is just
It hands over.In addition, though the drawn direction B of Fig. 1 is to refer to the direction into paper, however, it may also mean that out the direction of paper.
The servo diffraction light D left from storage disk 102 can enter light guide module 120, penetrate first by the first object lens 125
Polarization splitting prism 122 is directed to the third lens 126, and subsequently enters detector 140.When detector 140 receives servo diffraction
After light D, servo diffraction light D can be correspondingly formed image, and as shown in Fig. 3 A or Fig. 3 B, wherein Fig. 3 A and Fig. 3 B is according to the present invention
First embodiment is painted the schematic diagram of different images 160A and 160B respectively.
In Fig. 3 A and Fig. 3 B, the image 160A and 160B that are drawn may be regarded as the image of single page respectively.In order to facilitate narration,
Image 160A and 160B are indicated respectively with the pixel of 30*30.Through the contraposition letter recorded in storage disk 102 (see Fig. 1)
Breath, image 160A can have a loci 162, and in image 160B, there can be a contraposition lattice array 164, wherein right
Site array 164 has multiple locis 162.In some embodiments, loci 162 can be servo diffraction light D in detecing
The focal spot that is formed on device 140 is surveyed, and aligns lattice array 164 to can be servo diffraction light D poly- in what is formed on detector 140
Burnt array of light spots.
No matter servo diffraction light D be formed by image be there are single loci (as shown in the image 160A of Fig. 3 A) or
The contraposition information of storage disk 102 (see Fig. 1) can be all presented in multiple locis (as shown in the image 160B of Fig. 3 B).This
Outside, though not being painted, however storage disk 102 can also be presented in the image 160B of image 160A and Fig. 3 B of Fig. 3 A (see Fig. 1)
Page info.
It please return Fig. 1.After image 160B of the servo diffraction light D-shaped at image 160A or Fig. 3 B of such as Fig. 3 A, calculate
Device 150 can pass through the loci 162 of image 160A or 160B, calculate storage disk 102 in the offset of direction B, i.e. storage dish
Piece 102 is in the offset parallel with servo reading Prague degeneracy direction of light L.
Specifically, when servo reads light L and stores the relative positional relationship of disk 102 because storage disk 102 occurs partially
When moving and changing, if storage disk 102 is that Prague degeneracy direction for reading light L along parallel servo shifts, due to
Servo, which reads light L, can meet the condition of Prague degeneracy, thus servo read light L it is still sustainable in generated in storage disk 102 around
It penetrates.However, since storage disk 102 shifts, therefore loci 162 (as shown in Fig. 3 A or Fig. 3 B) can also deviate therewith,
Therefore, calculator 150 can pass through the offset of loci 162 (as shown in Fig. 3 A or Fig. 3 B) and calculate storage disk 102 and exist
Offset on the B of direction.That is, full figure stocking system 100A can pass through received servo diffraction light D offset, push away
Calculate the offset of storage disk 102 in directionb.
In some embodiments, loci 162 (such as Fig. 3 A or Fig. 3 B in the offset and image of disk 102 are stored
It is shown) offset positive correlation can be presented.For example, loci 162 (such as Fig. 3 A or the figure in storage disk 102 and image
Shown in 3B) offset can be it is proportional, as shown in figure 4, wherein Fig. 4 is the offset and storage disk of loci
The relation schematic diagram of offset, and x-axis is to store the offset of disk, and y-axis is the offset of loci.Due to storing disk
Offset with the loci in image is proportional relation, therefore calculator can be substantive to the calculation of the offset of storage disk
Upper satisfaction: y=k*x, wherein y is storage disk in the offset of direction B, and x is the offset of the loci in image.
It please return Fig. 1.When full figure stocking system 100A calculates storage disk 102 in direction B's through calculator 150
After offset, the position of storage disk 102 can be corrected, for example, full figure stocking system 100A may include actuator
152.Actuator 152 is electrically connected to calculator 150, and reads light L to the calculated result adjustment servo according to calculator 150
State.Specifically, actuator 152 can be connected to the element or storage disk 102 of full figure light source module 110, when storage dish
For piece 102 when direction B shifts, actuator 152 can pass through position or the storage dish of the element of correction full figure light source module 110
The position of piece 102, adjustment servo read the state of light L.
On the other hand, diffraction can not be generated in storage disk 102 to prevent servo from reading light L, in some embodiments
In, it can be spherical wave that servo, which reads wavefront form of the light L in its parallel Prague degeneracy direction, and servo reads light L in parallel
The wavefront in its Prague degeneracy direction has third curvature r3, and there is the 4th song in the wavefront in its orthogonal Prague degeneracy direction
Rate r4, wherein third curvature r3> the four curvature r4≤ 0, to increase Prague matching appearance that servo reads light L to storage disk 102
Degree of bearing.In addition, according to above-mentioned relation formula, as third curvature r3When being zero, indicate that servo reads light L in its orthogonal Prague degeneracy
The wavefront in direction is plane wave.
In addition to this, full figure stocking system 100A may include determining device 154.Determining device 154 is electrically connected to detector
140.When detector 140 is in reception servo diffraction light D in time interval, and forms multiple images, it is in storage disk 102
In the state of lasting offset, determining device 154 can be used to judge by multiple images the offset direction of storage disk 102.It is specific and
Speech, determining device 154 can pass through the moving direction of the loci 162 (as shown in Fig. 3 A or Fig. 3 B) in image and judge to store disk
102 offset direction.
Fig. 5 is painted the light path schematic diagram of full figure stocking system 100B for second embodiment according to the present invention.This implementation
At least one of mode and first embodiment discrepancy are that the full figure stocking system 100B of present embodiment is through full figure
Off-axis (off-axis) system that light source module 110 and light guide module 120 are collectively formed, and the full figure of first embodiment stores
System 100A is the coaxial system being collectively formed through full figure light source module 110 and light guide module 120.As shown in figure 5, guide-lighting mould
Block 120 includes the 4th lens 127, half wave plate 128, the second polarization spectroscope 129, reflecting mirror 130, third polarization spectro
Mirror 131, galvanometer 132, the 5th lens 133 and the second object lens 134.
Full figure light source module 110 can provide servo towards the 4th lens 127 of light guide module 120 and read light L.Servo reads light
L can sequentially pass through half wave plate 128, the second polarization spectroscope 129, reflecting mirror 130, galvanometer from the 4th lens 127
132, the 5th lens 133, and subsequently enter the second object lens 134.Through the second object lens 134, servo, which reads light L, can be directed to directive
Disk 102 is stored, and subsequently enters storage disk 102.Then, servo diffraction light D sequentially passes through second from storage disk 102 again
Object lens 134 and third polarization spectroscope 131, and after the reflection of third polarization spectroscope 131, into detector 140.It is same as first
Embodiment, after detector 140 receives servo diffraction light D and is correspondingly formed image, calculator 150 can calculate storage disk
102 in the offset of direction B, and details are not described herein.
Fig. 6 is please referred to, wherein Fig. 6 is painted the optical path of full figure stocking system 100C for third embodiment according to the present invention
Schematic diagram.At least one of present embodiment and first embodiment discrepancy is, the full figure stocking system of present embodiment
100C also includes secondary light source module 170 and auxiliary detector 172, wherein secondary light source module 170 and auxiliary detector 172
Position is arranged can be respectively adjacent to full figure light source module 110 and detector 140.In order not to keep attached drawing excessively complicated, stored up in full figure
In the optical path of deposit system 100C, secondary light source module 170 and assist detector 172 position respectively with full figure light source module 110
And detector 140 is illustrated in same place.
Secondary light source module 170 is arranged so that light guide module 120 is optically coupled to secondary light source module 170 and storage disk
Between 102, and detector 172 is assisted to be arranged so that light guide module 120 is optically coupled to storage disk 102 and auxiliary detector
Between 172.Secondary light source module 170 includes spatial light modulator 174, and can be used to provide auxiliary servo and read light L ', wherein
Auxiliary servo read light L ' can be guided by light guide module 120 storage disk 102, and then in storage disk 102 generate around
It penetrates, to become the auxiliary servo diffraction light D ' left from storage disk 102.Auxiliary servo diffraction light D ' can be by light guide module 120
Into auxiliary detector 172.That is, servo read light L and auxiliary servo read light L ' optical path and servo diffraction light D and
The optical path of auxiliary servo diffraction light D ' can be roughly the same.
It assists detector 172 to receive auxiliary servo diffraction light D ', and is electrically connected to calculator 150.When auxiliary is detectd
After surveying the reception of device 172 auxiliary servo diffraction light D ', auxiliary servo diffraction light D ' can be correspondingly formed image.That is, in same
Time point, detector 140 and auxiliary detector 172 can be respectively received by servo diffraction light D and auxiliary servo diffraction light D ' shape
At image.Then, fourier space angle of the calculator 150 to calculate servo diffraction light D Yu auxiliary servo diffraction light D ', and
The position of positioning storage disk 102 according to calculated result.
For example, when used detector is four quadrant photoelectric detector (quadrant photo detector)
Or the position detector of single near-infrafed photodiodes (photo diode), rather than when one-dimensional or two-dimentional optical signal detector, make
Frequency needed for the frequency that diffraction luminous point occurs is higher than actual location, and compiled using the timing that diffraction luminous point occurs as position
Code, when CD-RW discsCD-RW goes to different angle, the timing that servo diffraction luminous point occurs can be via specific coding, so as to defining disk
Absolute position.For example, coding form may include coding starting, position signal, coding termination, 111111 be coding starting,
In addition to continuous 31 or more or continuous 30 or more can be used as position signal, position between 0000000000~1111111111
For signal it is even possible that with ECC code (error-correcting code), 000000 is coding termination.When used detector is one-dimensional
Or it when two dimension optical signal detector, encodes luminous point on orthogonal Prague degeneracy direction, is described compared to front
Sequential coding, here can use space coding, also that is, coding mode can more simplify, and remove coding starting with
Coding termination.Furthermore, light L is read by servo and auxiliary servo reads light L ', calculator 150 can calculate storage dish
Offset of the piece 102 on different directions (servo reads light L and auxiliary servo reads Prague degeneracy direction of light L '), so as to
Orient the absolute position of storage disk 102.
In summary, full figure stocking system of the invention includes full figure light source module, storage disk, light guide module, detecting
Device, calculator, the servo that full figure light source can provide read light and inject storage dish to light guide module, and through the guiding of light guide module
Piece.Servo read light can in storage disk in generate diffraction, so as to become servo diffraction light and carry storage disk contraposition
Information.Then, servo diffraction light penetrates the guiding of light guide module and is received by detector, and forms the image with loci.
Calculator can be used to the loci through image, calculate offset of the storage disk on Prague degeneracy direction that servo reads light
Amount.After the offset for calculating storage disk, it can adjust the reading state that servo reads light, stored so as to more accurately reading
The information of 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 (18)
1. a kind of full figure stocking system, characterized by comprising:
One full figure light source module at least reads light to provide a servo；
One storage disk；
One light guide module, the servo to receive full figure light source module offer reads light, and servo reading light guide is drawn
To the storage disk, wherein the servo reads light in the storage disk when the servo reads light and is led to the storage disk
Diffraction is generated, and becomes the servo diffraction light left from the storage disk；
One detector, to the servo diffraction light left received from the storage disk；And
One calculator is electrically connected to the detector, and to be formed by an at least image through the servo diffraction light, calculating should
Disk is stored in the offset of a first direction, Prague degeneracy direction that wherein first direction and the servo read light is put down
Row.
2. full figure stocking system according to claim 1, which is characterized in that the calculation of the calculator meets: y=k*x,
Middle y is the storage disk in the offset of the first direction, and x is the offset of at least loci in the image.
3. full figure stocking system according to claim 2, which is characterized in that also include:
One determining device, is electrically connected to the detector, and to be formed by penetrating the servo diffraction light in a time interval
Multiple images judge the offset direction of the storage disk.
4. full figure stocking system according to claim 1, which is characterized in that the full figure light source module to provide a signal light and
One reference light, and the storage disk includes a storage layer, the storage layer is to record by the signal light and the reference light through dry
The page info for relating to and generating, and the servo reads light and penetrates in storage layer generation diffraction and as the servo diffraction light.
5. full figure stocking system according to claim 4, which is characterized in that the storage layer has a first area and one second area
Domain, which penetrates interference and the page info of generation by the signal light and the reference light to record, and secondth area
Domain is to make the servo read light generation diffraction and become the servo diffraction light, and the second area is covered in the first area.
6. full figure stocking system according to claim 5, which is characterized in that the first area of the storage layer and the second area
Include identical photosensitive material.
7. full figure stocking system according to claim 4, which is characterized in that the storage layer has a grating pattern, and the grating
The principal direction of the grating vector of pattern is orthogonal with the first direction.
8. full figure stocking system according to claim 1, which is characterized in that the full figure stocking system penetrates the full figure light source module
The one of them of off-axis system and coaxial system is collectively formed with the light guide module.
9. full figure stocking system according to claim 1, which is characterized in that the servo reads light in its parallel Prague degeneracy side
To wavefront form be spherical wave.
10. full figure stocking system according to claim 9, which is characterized in that the servo reads light in its parallel Prague degeneracy
The wavefront in direction has first curvature r1, and there is torsion r in the wavefront in its orthogonal Prague degeneracy direction2, and first is bent
Rate r1> torsion r2≧0。
11. full figure stocking system according to claim 1, which is characterized in that also include:
An at least actuator is electrically connected to the calculator, and adjusts the servo to the calculated result according to the calculator and read
Take the state of light.
12. full figure stocking system according to claim 1, which is characterized in that also include:
One secondary light source module reads light to provide an auxiliary servo, and wherein the auxiliary servo reads light and penetrates the leaded light mould
Block and be directed to the storage disk, and in the storage disk generate diffraction, and become watched from the auxiliary that the storage disk leaves
Take diffraction light；And
One auxiliary detector, to receive the auxiliary servo diffraction light, and is electrically connected to the calculator, wherein the calculator is used
To calculate the fourier space angle of the servo diffraction light Yu the auxiliary servo diffraction light, and the storage is positioned according to calculated result
The position of disk.
13. a kind of production method of full figure stocking system, characterized by comprising:
Irradiate a reference servo light and a servosignal light to one storage disk a storage layer, and through the reference servo light with
The servosignal light generates interference, and in one contraposition information of storage layer record, the contraposition information is to make a servo read light
Through in the storage layer generate diffraction and become a servo diffraction light, wherein when the servo diffraction light received by a detector and at
When for an image, which is presented the storage disk in the offset information of a first direction, and the first direction and the servo are read
Take Prague degeneracy direction of light parallel；
A reference light and a signal light are irradiated to the storage layer, and generate interference through the reference light and the signal light, and in this
Storage layer records a page info；And
An offset calculating formula of the storage disk is written in a calculator, so as to making the calculator calculate the storage through the image
Disk is deposited in the offset of the first direction.
14. production method according to claim 13, which is characterized in that the offset calculating formula substantially meets: y=k*x,
Middle y is the storage disk in the offset of the first direction, and x is the offset of at least loci in the image.
15. production method according to claim 13, which is characterized in that the reference servo light is in its parallel Prague degeneracy direction
Wavefront form be spherical wave.
16. production method according to claim 15, which is characterized in that the reference servo light is in its parallel Prague degeneracy direction
Wavefront have first curvature r1, and there is torsion r in the wavefront in its orthogonal Prague degeneracy direction2, and first curvature r1
> torsion r2≧0。
17. a kind of storage disk, characterized by comprising:
One storage layer has a first area and a second area, and wherein the first area is to record by a signal light and one
The page info that reference light is generated through interference, and the second area is produced to make a servo read light through in the storage layer
It gives birth to diffraction and becomes a servo diffraction light, wherein when the servo diffraction light is received by a detector and become an image, the shadow
As the storage disk is presented in the offset information of a first direction, and the first direction and the servo read Prague degeneracy of light
Direction is parallel.
18. storage disk according to claim 17, which is characterized in that cover the second area, and the storage in the first area
The first area of layer and the second area include identical photosensitive material.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5949531A (en) * | 1993-05-15 | 1999-09-07 | Leica Geosystems Ag | Device for distance measurement |
| CN1299507A (en) * | 1998-02-27 | 2001-06-13 | 光技术企业公司 | Method and apparatus for optical information, method and apparatus for reproducing optical information, apparatus for recording/reproducing optical information, and optical information recording mediu |
| CN105096974A (en) * | 2015-09-17 | 2015-11-25 | 青岛泰谷光电工程技术有限公司 | Holographic device and data reading device thereof |
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2017
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5949531A (en) * | 1993-05-15 | 1999-09-07 | Leica Geosystems Ag | Device for distance measurement |
| CN1299507A (en) * | 1998-02-27 | 2001-06-13 | 光技术企业公司 | Method and apparatus for optical information, method and apparatus for reproducing optical information, apparatus for recording/reproducing optical information, and optical information recording mediu |
| CN105096974A (en) * | 2015-09-17 | 2015-11-25 | 青岛泰谷光电工程技术有限公司 | Holographic device and data reading device thereof |
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