CN1806284A - Optical scanning device - Google Patents

Optical scanning device Download PDF

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Publication number
CN1806284A
CN1806284A CNA2004800164097A CN200480016409A CN1806284A CN 1806284 A CN1806284 A CN 1806284A CN A2004800164097 A CNA2004800164097 A CN A2004800164097A CN 200480016409 A CN200480016409 A CN 200480016409A CN 1806284 A CN1806284 A CN 1806284A
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CN
China
Prior art keywords
optical scanning
scanning device
information
potential difference
electric potential
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Pending
Application number
CNA2004800164097A
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Chinese (zh)
Inventor
M·范德马克
E·梅因德斯
J·卡尔曼
J·维尔德比克
A·帕迪
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Koninklijke Philips NV
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Koninklijke Philips Electronics NV
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Publication date
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Publication of CN1806284A publication Critical patent/CN1806284A/en
Pending legal-status Critical Current

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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
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/2403—Layers; Shape, structure or physical properties thereof
    • G11B7/24035—Recording layers
    • G11B7/24038—Multiple laminated recording layers
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
    • G11B7/242—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers
    • G11B7/244—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising organic materials only
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B17/00—Guiding record carriers not specifically of filamentary or web form, or of supports therefor
    • G11B17/02—Details
    • G11B17/022—Positioning or locking of single discs
    • G11B17/028—Positioning or locking of single discs of discs rotating during transducing operation
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
    • G11B19/02—Control of operating function, e.g. switching from recording to reproducing
    • G11B19/12—Control of operating function, e.g. switching from recording to reproducing by sensing distinguishing features of or on records, e.g. diameter end mark
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
    • G11B19/20—Driving; Starting; Stopping; Control thereof
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
    • G11B19/20—Driving; Starting; Stopping; Control thereof
    • G11B19/2009—Turntables, hubs and motors for disk drives; Mounting of motors in the drive
    • 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
    • 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
    • G11B7/005—Reproducing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R39/00—Rotary current collectors, distributors or interrupters
    • H01R39/02—Details for dynamo electric machines
    • H01R39/18—Contacts for co-operation with commutator or slip-ring, e.g. contact brush
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R39/00—Rotary current collectors, distributors or interrupters
    • H01R39/02—Details for dynamo electric machines
    • H01R39/18—Contacts for co-operation with commutator or slip-ring, e.g. contact brush
    • H01R39/30—Liquid contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R39/00—Rotary current collectors, distributors or interrupters
    • H01R39/64—Devices for uninterrupted current collection
    • H01R39/646—Devices for uninterrupted current collection through an electrical conductive fluid
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/05—Circuit arrangements or systems for wireless supply or distribution of electric power using capacitive coupling
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/40—Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
    • H02J50/402—Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices the two or more transmitting or the two or more receiving devices being integrated in the same unit, e.g. power mats with several coils or antennas with several sub-antennas
    • 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
    • G11B2007/0003—Recording, reproducing or erasing systems characterised by the structure or type of the carrier
    • G11B2007/0009—Recording, reproducing or erasing systems characterised by the structure or type of the carrier for carriers having data stored in three dimensions, e.g. volume storage
    • G11B2007/0013—Recording, reproducing or erasing systems characterised by the structure or type of the carrier for carriers having data stored in three dimensions, e.g. volume storage for carriers having multiple discrete layers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/18—Rotary transformers

Abstract

The invention relates to an optical scanning device for scanning an information carrier comprising a plurality of information layers which optical properties depend on a potential difference applied between two electrodes. The optical scanning device comprises a rotating part (301, 305) comprising means (301) for receiving the information carrier. The receiving means comprise a plurality of contacts (311-318) for connecting the electrodes. The rotating part further comprises receivers (321-324), each receiver corresponding to a given information layer. The optical scanning device further comprises a fixed part comprising an energy source (300) adapted to transfer energy to the receiver corresponding to a selected information layer. The rotating part comprises means for applying a potential difference between the contacts connected to the electrodes corresponding to the selected information layer.

Description

Optical scanning device
Invention field
The present invention relates to scan the optical scanning device of multi-layer information carrier.
The invention particularly relates to and be used for reading and/or to the optical disc apparatus and the optical storage of data of its record data from multiplayer optical disk.
Background of invention
Conventional optical scanning device generally includes a clamper (clamper), on it for example the CD of DVD (DVD represents digital versatile disc) before scanning, be fixed.Optical scanning device comprises that turning motor is with rotation clamper and information carrier.The rotation information carrier by beam flying to read the information that in helical track, has write, perhaps to the helical groove writing information.
The european patent application of submitting on February 27th, 2,003 03290470.8,03290471.6 and 03290473.2 is devoted to comprise the information carrier of a plurality of Information Levels, and the optical property of this Information Level depends on the electric potential difference that applies between two electrodes.This information carrier can have many relatively Information Levels.In fact, suitably select to be applied to the electric potential difference on the Information Level, beam flying by certain wavelength, an Information Level of information carrier can have the optical property that is suitable for scanning this Information Level, and the out of Memory layer is transparent for this light beam wavelength, does not disturb the scanning to the Information Level that is scanned like this.In these patented claims, ROM, WORM and RW information carrier (ROM represents ROM (read-only memory), and WORM represents write-once repeatedly readable, and the RW representative can be write) have been described.Like this, word " scanning " means from the information carrier reading of data or to information carrier and writes data.
An example of this information carrier is described in Fig. 1 a and 1b, and corresponding to the information carrier of describing in the european patent application 03290470.8.
This information carrier comprises first information layer 11, first dielectric substrate 12, first counter electrode 13, wall 14, second Information Level 15, second dielectric substrate 16 and second counter electrode 17.This information carrier can comprise the Information Level more than 2.For example, this information carrier can comprise 10,20 or up to 100 or even more information layer.For example, Fig. 1 b shows the information carrier that comprises 6 Information Levels.This information carrier can comprise the Information Level that optical property can not change by electric potential difference.For example, information carrier can comprise have can not switchable optics character ROM, WORM or RW Information Level, described Information Level is as the last Information Level of information carrier.This is particularly useful in the information carrier of carrying out BD standard (BD represents Blu-ray Disc).
Information Level 11 and 15 comprises hole (pit) and bank (land), and for example embossing and printing obtain by routine techniques for they.
Information carrier will be by the beam flying of wavelength 1.Select first and second dielectric substrates 12 and 16, first and second counter electrodes 13 and 17 and wall 14, make that they are transparent for wavelength 1, or have very little absorption at this wavelength at least, can light beam not exerted an influence.
In the example of Fig. 1 a and 1b, first and second Information Levels 11 and 15 comprise electrochromic material.In above-mentioned patented claim, describe the out of Memory carrier, for example had the information carrier that comprises the liquid crystal material Information Level.
Electrochromic material is a kind of material with optical property, and its optical property can be along with the generation of electronics or disappearance and changed.Electrochromic material is known in those skilled in the art.The character of electrochromic material for example, has been described in " Electrochromism:Fundamentals and Applications " book of writing by Paul M.S.Monk etc. that nineteen ninety-five publishes.Preferably, the electrochromic material that is used in according to the present invention in the information carrier is a thiophene derivant, for example poly-dioxoethyl thiophene, be also referred to as PEDT or PEDOT, for example, L.Bert Goenendaal etc. are at Advanced Materials 2000,12, describe to some extent among " Poly (3,4-ethylenedioxythiophene) and ItsDerivatives:Past, Present and Future " that delivers among the No.7.
In the example of Fig. 1 a, first and second Information Levels 11 are identical with 15 electrochromic material, and have the ortho states of going back and oxidation state.Select electrochromic material that it is in when going back ortho states and have high the absorption and reflection, have low the absorption and reflection at wavelength 1 when being in oxidation state at wavelength 1.
When first information layer 11 is scanned with when this first information layer 11 reads information, electric potential difference V1 is applied between the first information layer 11 and first counter electrode 13, and the electromotive force of first information layer 11 is than first counter electrode, 13 height.Electric current flows to first counter electrode 13 from first information layer 11, and electronics is transferred to first information layer 11 from first counter electrode 13.Electrochromic material absorbs electronics and is reduced.Owing to electroneutral reason, the positive ion of first dielectric substrate 12 is absorbed by first information layer 11 or negative ion is repelled by first information layer 11, and the negative ion of first electrolyte 12 is absorbed by first counter electrode 13 or positive ion is repelled by first counter electrode 13.Therefore, first counter electrode is to receive ion, is donor electrode (donating electrode).Select electric potential difference V1 to make when applying electric potential difference V1, the absorption of first information layer 11 be reflected in wavelength 1 and become relative high.
Then, in case conventional sensing technique is used in the absorption of first information layer 11 and be reflected into height, for example, use such as differing of being used for that CD-ROM reads and read principle, perhaps alternatively, by mark and unmarked between reflection or absorption difference, can read information from this Information Level.
In case the information of first information layer 11 is read, then scan second Information Level 15.At first, by between the first information layer 11 and first counter electrode 13, applying one-V1 electric potential difference (it is the reverse potential difference of V1), first information layer 11 bleach.Like this, the electrochromic material of first information layer 11 is oxidized, and it has low absorption and reflection at wavelength 1 in this state.Then, by apply electric potential difference V2 between second Information Level 15 and second counter electrode 17, second Information Level 15 becomes absorbefacient.In this example, V2 equals V1, and this is because first and second information stacks comprise identical electrochromic material.
In case the absorption of second Information Level 15 uprises, can read information from this Information Level.First information layer 11 is reading of interfere information not, and this is transparent because of first information layer 11.Therefore, Information Level of addressing only, and other layer of information carrier all is transparent or have low absorption and reflection.Required layer addressing by applying suitable electric potential difference between Information Level in different information stacks and the counter electrode.
Information Level has optical property like this, and it depends on and is applied to two electric potential differences between the electrode.Under the situation of Fig. 1 a and 1b, two electrodes are Information Level and counter electrode.In other cases, Information Level can be between two electrodes.
Therefore, must apply electric potential difference to this information carrier.For the conventional optical scanning device of information carrier rotation when scanning, this point is impossible.
The invention summary
A target of the present invention provides a kind of optical scanning device, and it can scan the information carrier that comprises a plurality of Information Levels, and the optical property of these a plurality of Information Levels depends on the electric potential difference that applies between two electrodes.
For reaching this purpose, the present invention proposes a kind of optical scanning device, be used to scan the information carrier that comprises a plurality of Information Levels, the optical property of this Information Level depends on the electric potential difference that applies between two electrodes, described optical scanning device comprises rotating part and fixed part, rotating part comprises device and a plurality of receiver that receives described information carrier, described receiving trap comprises a plurality of contacts that connect described electrode, each receiver is corresponding to given Information Level, fixed part comprises the energy transferring energy to the receiver corresponding to the selected information layer, and rotating part is included in the device that applies electric potential difference between the contact that is connected to corresponding to the electrode of selected information layer.
According to the present invention, information carrier is fixed to rotating part.Rotating part comprises contacting that a plurality of and electrode link to each other.Because the rotation when scanning of rotating part and information carrier is so can not apply electric potential difference to Information Level by the lead that links to each other with the fixed part of optical scanning device.Therefore, rotating part comprises the device that applies electric potential difference.In order to select Information Level (will be applied in electric potential difference on it) to change its optical property, use a plurality of receivers at rotating part, each receiver is corresponding to given Information Level.When selecting Information Level, the energy of the fixed part by being arranged in optical scanning device, energy is passed to the receiver corresponding to the selected information layer.Circuit in the fixed part can be controlled the energy, so that NE BY ENERGY TRANSFER is to the receiver corresponding to the selected information layer.Therefore, do not use lead between the fixed part of optical scanning device and information carrier, this allows information carrier to rotate freely.
Preferably, the device that applies electric potential difference is used for applying the electric potential difference corresponding to described transmission energy between described two contacts.The electric potential difference that is applied on the Information Level is provided by the energy.This has advantage, because do not need the energy that adds at rotating part, this has simplified the manufacturing process of rotating part.
Preferably, optical scanning device comprises the inductive coil that is installed on the rotating part and applies magnetic flux to produce faradic device by described inductive coil, and the device that applies electric potential difference, be used between described two contacts, applying corresponding to described faradic electric potential difference.In this case, being installed in inductive coil on the rotating part provides and has applied the necessary electric energy of electric potential difference.In this case, receiver only is used for selecting will be applied on it Information Level of electric potential difference.The electric potential difference that is applied to Information Level is provided by inductive coil.So just saved power, this is because select the required energy of Information Level less than the required energy of electric potential difference that is applied on this Information Level.Alternatively, use battery, use inductive coil with to described battery charge at rotating part.
In the first embodiment of the present invention, the energy comprises at least one radiation source, and receiver is a photosensitive detector.Preferably, radiation source is to be used for the radiation source of scan information carrier.In this case, use identical radiation source scan information carrier and transmission energy to receiver corresponding to the selected information layer.This has simplified optical scanning device, because only need a radiation source.
Preferably, radiation source is by the pulse producer power supply with power-up period, and described power-up period is the integral multiple of rotating part swing circle.Radiation source can be the radiation source that is used for scan information carrier, or other radiation source.Be radiated identical photosensitive detector in order to send, in the once rotation of rotating part radiate source radiation once, perhaps rotating part every two or three the rotation in radiate source radiation once.Like this, only the photosensitive detector corresponding to the selected information layer receives by the radiation source radiation emitted.
Preferably, photosensitive detector is arranged in the circle, this energy comprises a plurality of radiation sources that are arranged in the circle, the radiation by this way of described radiation source: in a rotary course of rotating part, shone continuously by all radiation sources corresponding to the photosensitive detector of selected information layer.Use this configuration, might in the rotary course of clamper, transmit energy continuously to photosensitive detector.Therefore, might apply electric potential difference continuously between suitable contact, to change the optical property of selected information layer, the selected information layer is corresponding to the photosensitive detector of Continuous irradiation.Therefore, the change of the optical property of selected information layer is very fast relatively.
In the second embodiment of the present invention, receiver is a conducting ring, and this energy comprises at least one conduction brush, in order to contact at least one conducting ring.According to this embodiment, use the electricity contact between fixed part and rotating part, to transmit energy.This can realize by sliding contact.Preferably, conducting ring comprises conductive fluid.This conductive fluid rotates with rotating part easily, contacts with fixed brush or electrode simultaneously.
In the third embodiment of the present invention, receiver is a primary conductor, and the energy comprises at least one secondary conductor, realizes NE BY ENERGY TRANSFER between described secondary conductor and the described primary conductor by capacitive coupling.
In the fourth embodiment of the present invention, receiver is an inductive coil, and the energy comprises at least one electromagnet portion, and the NE BY ENERGY TRANSFER between described electromagnet portion and the inductive coil realizes by inductive coupling.
With reference to the embodiment that after this describes, these and other aspect of the present invention will be more apparent.
The accompanying drawing summary
With reference now to accompanying drawing,, the present invention will be described in detail with the form of example, in the accompanying drawing:
-Fig. 1 a and 1b show the information carrier that is used for optical scanning device according to of the present invention;
-Fig. 2 shows according to rotating part of the present invention and information carrier;
-Fig. 3 shows according to optical scanning device of the present invention;
-Fig. 4 shows optical scanning device according to the preferred embodiment of the invention;
-Fig. 5 a shows first optical scanning device according to first embodiment of the invention, and Fig. 5 b shows the perspective view of P viewpoint among Fig. 5 a;
-Fig. 6 shows the preferred embodiment of the optical scanning device of Fig. 5 a;
-Fig. 7 a shows second optical scanning device according to first embodiment of the invention, and Fig. 7 b is the perspective view of P viewpoint among Fig. 7 a;
-Fig. 8 a shows the 3rd optical scanning device according to first embodiment of the invention, and Fig. 8 b is the perspective view of P viewpoint among Fig. 8 a, and Fig. 8 c is the top view of the energy of Fig. 8 a;
-Fig. 9 a shows first optical scanning device according to a second embodiment of the present invention, and Fig. 9 b is the perspective view of Fig. 9 a in the P viewpoint;
-Figure 10 a shows second optical scanning device according to a second embodiment of the present invention, and Figure 10 b is the perspective view of Figure 10 a in the P viewpoint;
-Figure 11 shows the preferred embodiment of the optical scanning device of Fig. 9 a;
-Figure 12 a shows the optical scanning device of a third embodiment in accordance with the invention, and Figure 12 b is the perspective view of P viewpoint among Figure 12 a;
-Figure 13 shows the optical scanning device of a fourth embodiment in accordance with the invention.
Detailed Description Of The Invention
Fig. 2 shows according to rotating part of the present invention and information carrier.Clamper 202 receives information carrier 201 with being used for fixing.Clamper 202 is installed on the turning axle 209, and this turning axle links to each other with turning motor (not shown in Fig. 2).Clamper 202 and turning axle 209 have formed rotating part.
Information carrier 201 comprises a plurality of electrodes, for example electrode 203 and 204.Information carrier 201 comprises a plurality of Information Levels, and its optical property depends on the electric potential difference that applies between two electrodes.In the example of Fig. 2, the part of information carrier 201 has only been described, it is corresponding to the interior section of described information carrier 201.Information Level can be an electrode, and as described in Figure 1, perhaps Information Level can be between two electrodes.
Clamper comprises contact, for example contacts 207 and 208, the electrode of these contact link information carriers 201.In this example, first electrode 203 comprises that first connects 205, and it contact 207 and links to each other with first, and second electrode 204 comprises that second connects 206, and it contacts 208 continuous with second.
The contact of clamper 202 links to each other with the device that applies electric potential difference between contacting at two, and this device that applies electric potential difference is included in the rotating part, among the figure below more detailed description will be arranged.
In the example of Fig. 2, clamper 202 has stairstepping, and this allows electrode to link to each other with contacting of clamper.The clamper 202 of other shape can be provided, for example have annular surface, contact the clamper that is arranged in this lip-deep circle.In this case, information carrier has the connection of arranging in a lip-deep circle of information carrier interior zone, and this connection links to each other with the electrode of information carrier.Below, the present invention will be described in conjunction with clamper (for example clamper of describing among Fig. 2).Certainly, the present invention is applicable to any clamper, as long as clamper comprises and contacting that the electrode of information carrier links to each other.
Fig. 3 shows according to optical scanning device of the present invention.This optical scanning device comprises the clamper 301 and the energy 300.Clamper 301 is installed on the turning axle 305, and this axle links to each other with centrifugal motor.Clamper 301 and turning axle 305 form rotating part.The energy 300 is fixed in the optical scanning device.Clamper 301 comprises 8 contact 311-318.Rotating part comprises 4 receiver 321-324, and they are installed on the turning axle 305 in this example.The energy 300 comprises a generator 341 and 4 energy transform device 331-334.Generator 341 gauge tap are to send energy in the transmitting device 331-334.
Each receiver is corresponding to given Information Level.In the example of after this describing, information carrier comprises 4 Information Levels.First information layer with contact between 317 and 318 two electrodes that link to each other, second Information Level with contact between 315 and 316 two electrodes that link to each other, the 3rd Information Level with contact between 313 and 314 two electrodes that link to each other, the 4th Information Level with contact between 311 and 312 continuous two electrodes.First receiver 321 is corresponding to first information layer, and second receiver 332 is corresponding to second Information Level, by that analogy.Suppose to select the 3rd Information Level, promptly electric potential difference is applied between the contact 313 and 314 to change the optical property of the 3rd Information Level.Generator 341 conductings and the switch that energy transform device 333 links to each other make energy send to described energy transform device 333, and this energy is transferred to the 3rd receiver 323.Therefore, the energy 300 is used for transferring energy to the receiver corresponding to the selected information layer.The energy value of transmission depends on needed time of optical property and the electric potential difference that changes Information Level, and the optical property of this Information Level depends on the material that uses in the structure of information carrier and the described information carrier.
Then as shown in Figure 3, can use the energy of transmission, between contact, to apply electric potential difference corresponding to the selected information layer.In this case, the device that is used to apply electric potential difference is the lead that links to each other with the receiver of rotating part.
Rotating part can comprise that extra being used to applies the device of electric potential difference, for example is installed in the battery in the rotating part.In this case, the energy of transmission only is used for differentiating which Information Level of selection.Rotating part comprises a circuit, and it is used for selecting applying electric potential difference between which two contact, as the function of the receiver of transmission of power.This circuit controling switch, for example transistor makes to apply electric potential difference between selected contact.
This allows to reduce the power consumption of fixed part, and is because need a spot of power transfer to receiver, selected so that the circuit of rotating part can detect corresponding to the Information Level of this receiver.
Fig. 4 shows optical scanning device according to the preferred embodiment of the invention, has the inductive coil that is installed on the clamper.Clamper 301 comprises inductive coil mounted thereto 401.Optical scanning device also comprises the fixed magnets 402 that produces magnetic field B.In the scanning process of information carrier, clamper 301 rotations.Therefore, inductive coil 401 inside are made to produce induction current in inductive coil 401 by the magnetic flux change that magnetic field produces.This induction current is used by circuit 403, and this circuit 403 provides described induction current between two contacts corresponding to the selected information layer.In this case, do not need battery at rotating part.Alternatively, battery is used in the clamper 301, and the usability induced current is with to described battery charge.
Fig. 5 a and 5b show first optical scanning device according to first embodiment of the invention.This optical scanning device comprises the clamper 301 that is installed on the turning axle 305, and the first, second, third and the 4th radiation source 505-508.Clamper 301 comprises 8 contact 311-318, and the first, second, third and the 4th photosensitive detector 501-504.Fig. 5 b is the perspective view at P visual angle among Fig. 5 a.For example, radiation source 505-508 is laser instrument or LED (LED represents light emitting diode).For example photosensitive detector 501-504 is a photodiode.
Optical scanning device comprises that further generator 341 is used for sending energy to radiation source 505-508, the feasible radiation source emitted radiation that receives described energy.The switch that generator 341 and being used for selects to send the radiation source of energy does not illustrate in Fig. 5 a.
After this example of describing among the example of Miao Shuing and Fig. 3 is identical.When the optical property of first information layer need change, when promptly first information layer was selected, first radiation source 505 carried out radiation, and promptly energy is sent to first radiation source 505.505 emitted radiations of first radiation source, it is absorbed by first photosensitive detector 501.This radiation converts electric current to, produces electric potential difference like this between the electrode of first photosensitive detector 501.Therefore, between contact 317 and 318, applied electric potential difference, and the optical property of first information layer changes.When selecting second Information Level, second radiation source 506 carries out radiation, by that analogy.
Radiation source can be launched continuous radiation.In this case, only when corresponding photosensitive detector is illuminated radiation just convert electric current to.In this example, photosensitive detector is once illuminated in each rotation of clamper 301, and this time-dependent is in the area of photosensitive detector.For save power, Cai emitted radiation only on photosensitive detector is positioned at radiation source the time.This can power to radiation source by the pulse producer with power-up period and realize that described power-up period is the integral multiple of clamper 301 swing circles.For example, if power-up period equals the swing circle of clamper 301, photosensitive detector is once illuminated in the rotation each time of clamper 301.If power-up period is the twice of the swing circle of clamper 301, then photosensitive detector is once illuminated in per two rotations of clamper 301.
Except the first, second, third and the 4th radiation source 505-508, can use movably radiation source, it is arranged in any one front among the first, second, third or the 4th photosensitive detector 501-504.Generator 341 is used for controlling the position of described removable radiation source.When selecting first information layer, generator 341 is placed on the front of first photosensitive detector 501 with removable radiation source, and energy is sent to described removable radiation source.
Under latter event, radiation source is movably with respect to information carrier.Yet when energy source transfers energy arrived suitable photosensitive detector, it remained on the fixed position.Therefore, word " fixed part " does not should be understood to the part that is completely fixed, but it is the part that can fix when rotating part rotates, that is, and and the part of rotating not with rotating part.
Fig. 6 shows the optical scanning device according to first embodiment of the invention, and wherein radiation source is the radiation source that is used for scan information carrier.Optical scanning device comprises lasing light emitter 601 and object lens 602.Lasing light emitter 601 produces light beam, and by object lens 602, it is focused on the Information Level of scanning.
Among this embodiment, lasing light emitter 601 can also be used to transferring energy to the photosensitive detector corresponding to the selected information layer.In fact, lasing light emitter 601 is parts of optical pick-up unit, and it is movably with respect to information carrier.Therefore, can use lasing light emitter 601 to replace 4 radiation source 505-508 among Fig. 4.When selecting first information layer, radiation source 601 is placed on the front of first photosensitive detector 501, and emitted radiation.When selecting second Information Level, radiation source 601 is placed on the front of second photosensitive detector 502, by that analogy.In case suitable energy value is transferred to photosensitive detector, then mobile lasing light emitter 601 is with scan information carrier.The energy value of transmission depends on the material character that uses in the information carrier and the structure of rotating part.For example, if rotating part also comprises battery, as described in Fig. 3 and Fig. 4, then the energy value of required transmission is low relatively.
By object lens 602, perhaps, can focus on the photosensitive detector by radiation source 601 radiation emitted by extra lens.Also may send the same photosensitive detector that is radiated.
Fig. 7 a shows second optical scanning device according to first embodiment of the invention, and Fig. 7 b is the perspective view of Fig. 7 a at the P visual angle.This optical scanning device comprises the clamper 301 that is installed on the turning axle 305, and radiation source 705.Clamper comprises 8 photosensitive detector 701a, 701b, 702a, 702b, 703a, 703b, 704a and 704b.Photosensitive detector is arranged in the circle on the bottom surface of clamper 301.
Among this embodiment, for example radiation source 705 can be laser diode or LED.Alternatively, radiation source 705 can be the lasing light emitter that is used for scan information carrier.
After this example of describing among the example of Miao Shuing and Fig. 3 is identical.Contact 311 links to each other with the electrode of photosensitive detector 704a with 312, and contact 313 links to each other with the electrode of photosensitive detector 703a with 314, contacts 315 and links to each other with the electrode of photosensitive detector 702a with 316, contacts 317 and links to each other with the electrode of photosensitive detector 701a with 318.
When selecting first information layer, photosensitive detector 701a is shone by radiation source 705.With respect to the position of the photosensitive detector 701a of radiation source 705 by a rotating speed device decision that is included in the clamper 301.Most of optical scanning devices comprise such rotating speed device.If optical scanning device does not comprise any rotating speed device, then on clamper 301, provide synchronizing pattern, a reference point of indication clamper 301.With respect to the position of the photosensitive detector of this reference point and the angular velocity of rotating part is known.Synchronizing pattern detects by optical pick-up unit.Therefore, the position of photosensitive detector 701a can be determined easily.
Radiation source 705 is by the pulse producer power supply with power-up period, and described power-up period is the integral multiple of the swing circle of rotating part.Therefore, irradiates light responsive detectors 701a only when information carrier rotates.Then, radiation converts electric current to, and produces electric potential difference between the electrode of the first photosensitive detector 701a.Therefore, electric potential difference is applied between the contact 317 and 318, and has changed the optical property of first information layer.
When selecting second Information Level, photosensitive detector 702a is shone by radiation source 705.This can finish by launching at a period of time (corresponding to the angle between photosensitive detector 701a and the 702a) delayed radiation.In the example of Fig. 7 a and 7b, this angle is 90 degree.Then, radiation source is by the pulse producer power supply with power-up period, and described power-up period is the integral multiple of rotating part swing circle.
In the example of Fig. 7 a and 7b, clamper 301 further comprises four additional photosensitive detector 701b-704b.Photosensitive detector 701b is corresponding to first information layer, and photosensitive detector 702b is corresponding to second Information Level, and photosensitive detector 703b is corresponding to the 3rd Information Level, and photosensitive detector 704b is corresponding to the 4th Information Level.Contact 311 links to each other with the electrode of photosensitive detector 704b with 312, and contact 313 links to each other with the electrode of photosensitive detector 703b with 314, contacts 315 and links to each other with the electrode of photosensitive detector 702b with 316, contacts 317 and links to each other with the electrode of photosensitive detector 701b with 318.Yet it is reverse that the polarity of photosensitive detector 701b-704b is compared with the polarity of photosensitive detector 701a-704a.For example this means that when photosensitive detector 701b is illuminated the electric potential difference that applies between the contact 317 and 318 is the reverse potential difference that contacts the electric potential difference that applies between 317 and 318 when photosensitive detector 701a is illuminated.This allows to apply positive and negative electric potential difference between the electrode of information carrier.In fact, this may need, and this is because in some information carrier with a plurality of Information Levels (its optical property depends on the electric potential difference that applies between two electrodes), according to the optical property of required change, must apply different electric potential differences.For example, may apply positive potential difference so that its absorption and reflection to Information Level, it is transparent to apply the negative potential official post.
Fig. 8 a, 8b and 8c show the 3rd optical scanning device according to the first embodiment of the present invention.The backplan of the clamper 301 of Fig. 8 b representative graph 8a, the top view of the energy of Fig. 8 c representative graph 8a.This optical scanning device comprises the clamper 301 that is installed on the turning axle 305, and comprises the energy that is arranged in one group of radiation source 801-808 in the circle.Clamper comprises 4 photosensitive detector 701a, 702a, 703a and 704a.Photosensitive detector is arranged in the circle of clamper 301 bottom surfaces.
After this example of describing among the example of Miao Shuing and Fig. 7 is identical.In order to select second Information Level, be positioned at the radiation source emitted radiation under the photosensitive detector 702a.If clamper is in corresponding to the position shown in Fig. 8 b, radiation source 801 emitted radiations.Therefore, between contact 315 and 316, apply electric potential difference, as previously explained.Yet, clamper 301 rotations, so after a period of time (it depends on the gyro frequency of clamper 301), photosensitive detector 702a leaves the zone of being shone by radiation source 801, this zone is represented by the dotted line among Fig. 8 b.When photosensitive detector 702a left radiation source 801 irradiation regional, radiation source directly adjacent with radiation source 801 in the rotation of clamper 301 carried out radiation, and radiation source 801 stops emitted radiation.In this example, if the rotation of clamper 301 is clockwise, then radiation source 808 carries out radiation.This repeats in the whole rotation of clamper 301, makes after a complete rotation radiation source 801 radiation once more.This can realize by pulse producer of control radiation source 801-808, and it uses with the synchronous time delays of the rotation of clamper 301 and makes radiate source radiation.
Therefore, the photosensitive detector corresponding to the selected information layer is shone continuously by all radiation sources in a rotation of clamper.Therefore in all rotations of clamper almost, in described photosensitive detector, produce electric current.If overlapping a little, even may in described photosensitive detector, obtain continuous electric current by the zone of illuminated by adjacent radiation sources.Therefore, the electric current that the change speed dependent of the optical property of corresponding information layer produces in photosensitive detector, Fig. 8 a allow to obtain the quick change of optical property to the optical device of 8c.
Fig. 9 a shows first optical scanning device according to second embodiment of the invention.This optical scanning device comprises the first, second, third, fourth and the 5th conducting ring 921-925, the first, second, third, fourth and the 5th brush 931-935, and generator 941.Fig. 9 b is the perspective view of Fig. 9 a at the P visual angle.
Brush for example is a carbon brush.Conducting ring and carbon brush, for example first conducting ring 921 and first carbon brush 931 form sliding contact.For example this sliding contact is described in the patent US 4,398,113 that authorizes August 9 nineteen eighty-three to some extent.Except brush 931, can use another kind of conducting ring, it is fixed with respect to first conducting ring 921, contacts with described first conducting ring, 921 electricity.For obtaining this method, can between two conducting rings, use ball bearing.This ball bearing is by conductive oil or grease lubrication, and this conductive oil or grease can comprise conductive particle, for example carbon granule or metallic particles or conducting polymer.
First brush 931 contacts with first conducting ring, 921 electricity, and second brush 932 contacts with second conducting ring, 922 electricity, by that analogy.The 5th brush 935 links to each other with the ground of generator 341, and the first, the 3rd, the 5th contacts 311,313,315 links to each other with the 5th conducting ring 925 with 317 with the 7th.
When selecting first information layer, generator 341 conductings are corresponding to the switch of first brush 931, and energy is sent to described first brush 931, this means in this case to have applied electric potential difference between first brush 931 and ground.Therefore, between contact 318 and 317, apply electric potential difference, changed the optical property of first information layer.
Except the first, second, third and the 4th brush 931-934, can also use removable brush, it contacts with any electricity among the first, second, third or the 4th conducting ring 921-924.Generator 341 is used for controlling the position of described removable brush.When selecting first information layer, generator 341 contacts removable brush with first conducting ring, 921 electricity, and energy is sent to described removable brush.
Figure 10 a shows second optical scanning device according to a second embodiment of the present invention, and Figure 10 b is the perspective view of Figure 10 a at the P visual angle.This optical scanning device comprises and the optical scanning device components identical shown in Fig. 9 a and the 9b, but conducting ring 921-925 is installed on the clamper 301 rather than on the turning axle 305.Conducting ring 921-925 has different diameters, makes them can be installed on the same surface of clamper 301.
The function of describing among the function of this optical scanning device and Fig. 9 a and the 9b is identical.Replace the first, second, third and the 4th brush 931-934, can use removable brush, it contacts with any one electricity among the first, second, third or the 4th conducting ring 921-924.Generator 341 is used for controlling the position of described removable brush.
Figure 11 shows the preferred embodiment of the optical scanning device of Fig. 9 a and 9b.For making things convenient between it, only show corresponding to conducting ring of first conducting ring 921 and first brush 931 and brush or electrode.In the preferred embodiment, other conducting ring of Fig. 9 a and 9b is identical with conducting ring shown in Figure 11 and brush with brush.
In the preferred embodiment, conducting ring 921 is made by conductive fluid 1104.Conductive fluid is encapsulated in the isolated part 1101, and this isolated part is fixed in the optical scanning device.Use sealing ring 1105 to allow turning axle 305 with respect to isolated part 1101 rotations.
Electrode 1102 is inserted in the conductive fluid 1104, and links to each other with generator 341 by switch, does not illustrate in Figure 11.When selecting first information layer, this switch conduction, electric potential difference is applied between electrode 1102 and the ground like this.Because electrode 1102 contacts with conductive fluid 1104 electricity, this conductive fluid 1104 with contact 318 and link to each other, described electric potential difference is applied between the contact 317 and 318.Conductive fluid 1104 can be conducting fluids or have metallic particles or the suspending liquid of the fluid carrier of carbon granule.For example, the polymer nature with the copper particle that is embedded in the matrix can be used as conductive fluid 1104.
Figure 12 a shows the optical scanning device according to third embodiment of the invention.Among this embodiment, optical scanning device comprises the first, second, third and the 4th primary conductor 1221-1224, and the first, second, third and the 4th secondary conductor 1231-1234.Secondary conductor 1231-1234 has two electrodes, and an electrode links to each other with ground, does not illustrate in Figure 12 a, and another electrode links to each other with generator 341 by switch.Primary conductor 1221-1224 is installed on the turning axle 305, and secondary conductor 1231-1234 is the fixed part of optical scanning device.Insulator is between the primary and secondary conductor.Therefore, optical scanning device comprises 4 insulator 1241-1244.For example, insulator is air or insulating oil film.Primary conductor, insulator and secondary conductor have formed the electric capacity ring.Figure 12 b is the perspective view of Figure 12 a in the P direction.
First primary conductor 1221 has two electrodes, electrode with contact 318 and link to each other, another is with contact 317 continuous.Second primary conductor 1222 also has two electrodes, electrode with contact 316 and link to each other, another with contact 315 continuous, by that analogy.
When selecting ground floor, generator 341 conductings are corresponding to the switch of first secondary conductor 1231, electric potential difference is applied between the electrode of first secondary conductor 1231, and first secondary conductor is arranged by this way: between first secondary conductor 1231 and first primary conductor 1221 capacitive coupling takes place.Therefore, power transfer is to first primary conductor 1221, and therefore received by described first primary conductor 1221.Electric potential difference is applied between the electrode of first primary conductor 1221 like this.Therefore, between contact 318 and 317, apply electric potential difference, changed the optical property of first information layer.
Because capacitive coupling does not need any contact between secondary conductor 1231-1234 and the primary conductor 1221-1224, so it is easy to implement in optical scanning device according to the present invention, optical scanning device of the present invention need transmit energy between fixed part and rotating part.
Replace first, second, third, fourth secondary conductor 1231-1234, can use movably secondary conductor, make among itself and the first, second, third or the 4th primary conductor 1221-1224 any that capacitive coupling take place.Generator 341 is used for controlling the position of described removable secondary conductor.When selecting first information layer, generator 341 is placed removable secondary conductor near first conducting ring 1221, and energy is sent to described removable secondary conductor.
Figure 13 shows the optical scanning device according to fourth embodiment of the invention.Among this embodiment, receiver is an inductive coil, and the energy comprises generator 341 and electromagnet portion, and the energy between electromagnet portion and the inductive coil shifts and realizes by inductive coupling.For simplicity, only show an inductive coil 1321 and an electromagnet portion 1331.Optical scanning device further comprises 3 electromagnet portion and 3 inductive coils, and each is corresponding to given Information Level.
Inductive coil 1321 is installed on the turning axle.Electromagnet portion 1331 is fixed parts of optical scanning device.Electromagnet portion 1331 and generator 341 link to each other by switch, so produce magnetic field when electric potential difference is applied on the described electromagnet portion 1331.
When selecting ground floor, generator 341 conductings are corresponding to the switch of electromagnet portion 1331, and the electric potential difference of alternation is applied on the described electromagnet portion 1331.Electromagnet portion 1331 converts this alternating potential difference to alternating magnetic fields.This alternating magnetic fields causes the change through the magnetic flux of inductive coil 1321, produces induction current like this in described inductive coil 1321.This induction current is applied between the contact 317 and 318.Therefore, between described contact 317 and 318, apply electric potential difference, changed the optical property of described first information layer.
Among this embodiment, the rotation of inductive coil 1321 cuts little ice, because induction current is produced by the variation of magnetic flux in the inductive coil 1321, this variation results from alternating magnetic fields.Therefore, the energy of transmission does not rely on the rotational speed of rotating part, and this point is favourable.
Replace 4 electromagnet portion, can use movably electromagnet portion, make it produce alternating magnetic field corresponding to the inductive coil inside of selected information layer.Generator 341 is used for controlling the position of described removable electromagnet portion.
Any Reference numeral in the following claim should not be construed as the restriction claim.Clearly verb " comprise " and it be used in combination the existence of not getting rid of other element that defines in any claim." one " or " one " before the element does not get rid of the existence of a plurality of like this elements.

Claims (11)

1. the optical scanning device of a scan information carrier (201), this information carrier comprises a plurality of Information Levels, their optical property depends on and is applied to two electrodes (203,204) electric potential difference between, described optical scanning device comprises rotating part (301,305) and fixed part, rotating part comprises device (301) and a plurality of receiver (321-324) that receives described information carrier, described receiving trap comprises that a plurality of contacts (311-318) are in order to connect described electrode, each receiver is corresponding to given Information Level, fixed part comprises and is used for transmitting energy to the energy (300) corresponding to the receiver of selected information layer, and rotating part is included in the device that applies electric potential difference between the contact that is connected to corresponding to the electrode of selected information layer.
2. optical scanning device as claimed in claim 1, the device that wherein applies electric potential difference is used for applying the electric potential difference corresponding to described transmission of power between described two contacts.
3. optical scanning device as claimed in claim 1, further comprise the inductive coil (401) that is installed on the rotating part and apply magnetic flux to produce faradic device (402) by described inductive coil, the device that applies electric potential difference is used for applying corresponding to described faradic electric potential difference between described two contacts.
4. optical scanning device as claimed in claim 1, wherein the energy comprises at least one radiation source (505-508), and receiver is photosensitive detector (501-504).
5. optical scanning device as claimed in claim 4, wherein radiation source (601) is the radiation source that is used for scan information carrier.
6. optical scanning device as claimed in claim 4, wherein said radiation source is by the pulse producer power supply with power-up period, and described power-up period is the integral multiple of rotating part swing circle.
7. optical scanning device as claimed in claim 4, wherein photosensitive detector (701a-704a) is arranged in the circle, the energy comprises a plurality of radiation sources (801-808) that are arranged in the circle, described radiation source with corresponding to the photosensitive detector of selected information layer during a rotation of rotating part by the mode radiation of all radiation source Continuous irradiation.
8. optical scanning device as claimed in claim 1, wherein receiver is conducting ring (921-924), the energy comprises that at least one conduction brush (931-934) is to contact at least one conducting ring.
9. optical scanning device as claimed in claim 8, wherein conducting ring comprises conductive fluid (1104).
10. optical scanning device as claimed in claim 1, wherein receiver is primary conductor (1221-1224), the energy comprises at least one secondary conductor (1231-1234), realizes power transfer between described secondary conductor and the primary conductor by capacitive coupling.
11. optical scanning device as claimed in claim 1, wherein receiver is inductive coil (1321), and the energy comprises at least one electromagnet portion (1331), and the power transfer between described electromagnet portion and the inductive coil realizes by inductive coupling.
CNA2004800164097A 2003-06-11 2004-06-03 Optical scanning device Pending CN1806284A (en)

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US4832456A (en) * 1986-03-04 1989-05-23 Semiconductor Energy Laboratory Co., Ltd. Liquid crystal disc memory with circular grooves for auto-focusing of write-in beam
GB8606651D0 (en) * 1986-03-18 1986-04-23 Green M Electrochromic data recording systems
JP3558306B2 (en) * 1994-07-26 2004-08-25 パイオニア株式会社 Multilayer recording disk and recording / reproducing system using the same
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