CN1830029A - Content information layer for an optical record carrier - Google Patents
Content information layer for an optical record carrier Download PDFInfo
- Publication number
- CN1830029A CN1830029A CNA2004800217925A CN200480021792A CN1830029A CN 1830029 A CN1830029 A CN 1830029A CN A2004800217925 A CNA2004800217925 A CN A2004800217925A CN 200480021792 A CN200480021792 A CN 200480021792A CN 1830029 A CN1830029 A CN 1830029A
- Authority
- CN
- China
- Prior art keywords
- content information
- radiation
- layer
- record carrier
- optical record
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Optical Recording Or Reproduction (AREA)
Abstract
An optical record carrier (2) and associated methods and devices are described. The carrier (2) comprises at least one user information layer (4a ,4b) arranged to be scanned by first radiation, and at least one content information layer (3a ,3b) or label layer. The content information layer comprises representing content information and having a first transmission for said first radiation and a second, lower transmission for a different, second radiation.
Description
The present invention relates to a kind of content information layer that is used for optical record carrier, also relate to the manufacture method of the record carrier that comprises a kind of like this Information Level, and the correlation technique and the equipment that are used for being embedded at described layer content information.Described layer is particularly suitable for but is not limited to being applied on the double sided optical disc.
CD is can be by the information-stored disk that uses a branch of radiation scanning disk body that is generally predetermined wavelength to read.Term radiation should be understood to not only to refer to the radiation in the visible part of spectrum, also refers to the radiation of electromagnetic radiation all wavelengths.
Existing CD exists with many standards, wherein comprises CD (compact disk), DVD (digital multi-purpose CD) and BD (Blu-ray Disc).Fig. 1 has shown an example of typical CD 100.Comprise a plurality of layers (103,104,105,107) in the dish.User profile layer 104 on disk 100, and reads information storage by a branch of radiation of inciding on the plane of incidence 106.The common protected seam 103 of user profile layer covers, and the mechanical support of providing is provided and/or protects user profile layer 104 to avoid the basic unit 105 of environmental impact.For making the user CD can be different from other similar CD, CD with the plane of incidence 106 facing surfaces on a content information layer 107 is provided, be called label again.This content information or label information are that the user is visible, promptly can be made by the user usually and with the naked eye discern and understand.Content information is represented with the district that the mode that is different from surrounding medium reflects or absorb the incident surround lighting by those, or is coded in the described district.District can be had the dyestuff that is different from the surrounding medium color and constituted by a kind of.Single district can form pattern; A plurality of districts also can form one or more patterns, for example character and image.Content information generally provides the content of relevant user profile layer and the kinds of information of CD.It can comprise a series of relevant informations to the user, for example the title and the list of tracks of the kind of record carrier (for example CD, DVD, CD-R, CD-RW), music CD or be used for the software manual that computer program divides luminosity scale.
Be to improve the memory capacity of CD, expectation be will dish two faces all be used for storing subscriber information, promptly adopt both-sided optical disc.But, so just can not on dish, common visible content information layer of user or label be provided, because such reflection/absorption layer can hinder the user profile layer of the side of scanning disk.If content information layer is not provided, then Pan identification has just become problem.
A purpose of embodiment of the present invention is to provide a kind of improved content information layer, and it can solve one or more problems of prior art, and no matter whether these problems are mentioned in this article.
The purpose of specific embodiments of the present invention is to provide a kind of content information layer, and it can be applied on the two-sided optical record carrier, and does not hinder the scanning of the information on two faces of record carrier.
In first aspect, the invention provides and a kind ofly comprise at least one content information layer and be arranged to see through the optical record carrier of described content information layer by at least one user profile layer of first radiation scanning; Content information layer comprises the district of at least one the represent content information that is positioned at surrounding medium, and content layer is transparent for described first radiation, and described district and surrounding medium provide the visual contrast of optics to second a different radiation.
Content information layer, promptly described at least one district and its surrounding medium the two, should be transparent for first radiation of the user profile layer that is used to describe record carrier.The transmission of first radiation preferably should be high to making writing, read and/or wipe and not influenced by the existence of content information layer of user's Information Level.
Can recording user recording of information carrier for the user, described layer preferably surpasses 70% to the one way transmission of first radiation, more preferably surpasses 90%.Described district and its material around are preferably basic identical to the transmission of first radiation, and promptly difference is in 10% or more preferably 3%.
Described district and surrounding medium thereof be the display optical contrast under second radiation that is different from first radiation.Second radiation is used to watch content information.Above-mentioned contrast preferably is enough to the naked eye read content information.Contrast more than 4% or 4% just is enough to observe with the naked eye usually.For better observability, preferred 30% or bigger contrast.Described contrast is relevant with second radiation.When second radiation comprised either large or small wavelength coverage, the also corresponding therewith either large or small scope of described contrast was relevant.For example, district is high more with the reflection of comparing around it in the red light portion of spectrum, just should have above-mentioned minimum the contrast in this red light portion, makes described district take on a red color for the observer.
Contrast between described district and its surrounding medium can be a various ways, for example different colors, different reflection type such as direct reflection and diffuse reflection or different reflected radiation amounts.Second radiation is one or more components of surround lighting normally, preferably at the visible part of spectrum.For second radiation at least one component within visible spectrum, should reach desired contrast.
By such content information layer is provided, described at least one district can allow first radiation transmission in the clear that is used to scan the user profile floor.But with second radiation such as surround lighting radiation the time, described district will be visible for the user, because it can reflect and/or absorb at least a portion incident radiation.Thus, wherein the content information layer that is recorded in the described district of content information can not hinder the scanning of user profile in the user profile floor.Therefore, this content information layer can be arranged within the two-sided optical record carrier or on the content information of relevant record carrier is provided.
In a preferred embodiment, described at least one district has first transmission of described first radiation and the second lower transmission to the second different radiation.To the lower transmission of second radiation may be that bigger absorption or reflection by described district causes.Second transmission is preferably low than first transmission, and its low degree should make the incident radiation that described district absorbs or reflection is quite a large amount of, causes visible enough contrasts under ambient light conditions.
In a specific embodiments, content information layer has high transmission for first radiation with predetermined polarisation, and provides optical contrast to second radiation with different polarization.First radiation can for example be a linear polarization, and second radiation is a linear polarization on perpendicular to the polarization direction of first radiation.Second radiation can be one or more components with above-mentioned linear polarization of surround lighting.A district in content information layer can be by the made with dependence-dependence transmission (dependent-dependent transmission), preferably by the birefringent material manufacturing; Medium right and wrong around this district are birefringent.When birefringent material suitably was orientated, first radiation of incident can not stand the change of refractive index when passing described district and surrounding medium.On the contrary, second radiation can stand refraction index changing when passing described district, thereby part incident is reflected.Second radiation can not stand refraction index changing when passing surrounding medium.The reflection difference of second radiation between described district and surrounding medium thereof caused optical contrast, makes to read the content information that is stored in the layer.Described district and surrounding medium can be up to 100% to the transmission of first radiation.District can be about 95% of a district that is made of single two-fold beam to the transmission of second radiation; For the district that is formed by the many birefringent particles that are dispersed in the host material, transmission may be low to moderate 9%.Described particle carries out diffuse reflection by repeatedly reflecting and reflecting to second radiation of incident.Described host material can be an isotropy or anisotropic.
In another embodiment, content information layer has high transmission for first radiation with predetermined wavelength, and provides optical contrast to second radiation of different wave length.The wavelength of first radiation can be the Wavelength of Laser that is used to scanning record carrier.Second radiation can be the one or more components with different wave length of surround lighting.District in the content information layer can make with the material with wavelength dependency transmission; Medium around the district is made by the material that its transmission has a different wavelength dependency.Two kinds of materials can be dyestuffs.Described district can only be made by dyestuff or be made by the dyestuff that is embedded in the matrix.Medium around the district can be by making with above-mentioned matrix identical materials.The transmission meeting under the wavelength of first radiation of described district and surrounding medium thereof is very high.The reflection of second radiation in the district will be different from the reflection in the medium around, thereby the optical contrast of expectation is provided.Described district and surrounding medium can surpass 90% and can be near 100% to the transmission of first radiation.The district can be any value between the 1-100% to the reflection of second radiation, and the reflection of surrounding medium also can have any different value in this scope.Should realize at least one wavelength in the visible part that is compared to spectrum by the different caused of reflection.Transmission may be 100% under the wavelength of first radiation, may reduce to 0% under another wavelength.If for example a district has high reflection about 600nm, under other wavelength, have low reflection, surrounding medium all has low reflection under all wavelengths of the visible part of spectrum, and then described district can take on a red color under the light background.
For described district and can comprise identical materials on every side, but the optical property that should make material in the district and its material around is different in the content information layer.Optical property can be the dependence-dependence of wavelength dependency or transmission.For example, material comprises the birefringent particles that is dispersed in a kind of isotropic matrix.Distinguish endocorpuscular birefringent orientation and select to be different from the endocorpuscular birefringent orientation of surrounding medium, the radiation that has first polarization like this matrix with in particle, stand identical refractive index, no matter be in the district or in their surrounding medium, and stand different refractive indexes in the matrix of the radiation with second polarization in the district and the particle, stand identical refractive index in the interior matrix of medium and the particle around.
In another embodiment, content information layer has a zone and comprises a plurality of basic equi-spaced apart and opaque substantially colored subarea.An above-mentioned colored speech comprises black, grey and white.Described subarea, colored ink point for example is deposited on the substrate surface of optical record carrier.Usually can be by deliberately putting into the ability of anti-fingerprint sensitivity that the printing ink point comes the equipment that reads or writes of test light record carrier at substrate surface.Because light beam, promptly first radiation beam has sizable width at substrate surface, does not write or sense information therefrom so little printing ink point can not hinder to darker user profile layer.Therefore, preferably the size in described colored subarea at 75-20000 μ m
2Between.Last accompanying drawing is the subarea of about maximum 150 μ m corresponding to diameter.Preferably, its diameter is less than 50um.For guaranteeing enough optical transmissions of first radiation, the 10-30% in whole contents Information Level district is selected to account in described colored subarea, and substantially flat be deployed in the whole contents Information Level district.By flatly launching, can avoid unexpected transmission to change.A key component of translucent label is exactly to avoid the unexpected transmission between the sideline of the visual pattern of label to change.By using opaque basically subarea, almost got rid of these transmissions and changed.Can be by when keeping the area identical coverage rate, using different ink colors to realize visual sharpened edge to the subarea.Read or write equipment for optical record carrier, having only unappropriated record carrier surface is significant for signal level.But may show as the source of light scattering, but this scattering can not disturbed the process of reading or writing, because it is out-of-focus basically.Do not get rid of transparent a little subarea, point for example, spot size by for example reducing edge gradually or dot density " soft " edge of producing visual tag information preferably in this case.
In another embodiment, content information layer comprises a plurality of for first radiation layering of same transparent different colours basically.For example, used thin homogeneous dye coating or coating, they are transparent reading or writing under the wavelength.The dyestuff zone preferably shows the boundary line hardly reading or writing between district's intrinsic dye-non-dyestuff or the dyestuff 1-dyestuff 2.These dyestuff zones not only must be substantially transparents to first radiation (for example optical record carrier reads or writes the wavelength that reads or writes of equipment), and transparency must be equal substantially.The dyestuff that preferably uses the optical clear dyestuff of homogeneous rather than contain little color grains is an emulsion.In addition, advantageously content information layer has the optical thickness of basic homogeneous under first radiation wavelength so that when writing on the user profile layer at optical record carrier under first radiation wavelength or therefrom reading information with the minimum interference of the optical wavefront of focused laser beam.When content information layer further comprises away from the optical clear basically of described at least one user profile layer and smooth protective seam, can realize this point.Like this, the physical thickness between the layering changes and the gap is filled up, and optical thickness change is reduced.
In another embodiment, content information layer is included in the dielectric layer that has antireflective property under first radiation wavelength, and these dielectric layers are represented content visible information.For example use dielectric coat, be similar to those and be coated on the sunglasses for example, completely or partially apply label side according to the label design of expectation.The general gross thickness of this coating is several 1/4 wavelength.Equally, preferably between different colours, almost there is not the boundary line.Equally, be essential to the excellent transparency that reads or write wavelength.
Optical record carrier can be in conjunction with two or more following performances, the material of content information layer can be a birefringence, be dispersed in a kind of host material, described material can be a dyestuff, those districts in the content information layer form pattern, record carrier can be two-sided, has at least one face on content information layer and each face and all has the user profile layer.
On the other hand, the invention provides and a kind ofly comprise at least one content information layer and be arranged to see through the optical record carrier of described content information layer by at least one user profile layer of first radiation scanning, thereby comprise a kind of material that pattern is provided at the district of at least one the represent content information in the surrounding medium that is recorded as in the content information layer, content layer is that transparent and described district provides optical contrast with surrounding medium to second a different radiation to described first radiation.
In this record carrier, at least one district can change under ectocine such as radiation or electric field in the existence and the position of content information layer.A kind of like this record carrier allows that content information is recorded in the content information layer of Unrecorded or partial record.It is also allowed by wiping old content information and/or writing new content information and changes content information.
Because the material in described district is a birefringence, described recording process may relate to and changes described birefringent orientation partly, and for the situation of liquid crystal material, this relates to the orientation that changes liquid crystal molecule.
On the other hand, the invention provides the equipment that writes content information in a kind of content information layer that is used on optical record carrier, described optical record carrier comprises: at least one content information layer sees through described content information layer at least one user profile layer by first radiation scanning with being arranged to, and comprises recordable material in the content information layer; Described equipment can the recorded content Information Level described material so that at least one district with pattern mode represent content information is provided, described district and surrounding medium thereof provide optical contrast to second a different radiation.
On the other hand, the invention provides a kind of method that is used in optical record carrier, writing content information, described optical record carrier comprises: at least one content information layer sees through described content information layer at least one user profile layer by first radiation scanning with being arranged to, and comprises recordable material in the content information layer; Described method comprises the described material of recorded content Information Level so that the step in the district of at least one represent content information is provided, and described district and surrounding medium thereof provide optical contrast to second a different radiation.
On the other hand, the invention provides a kind of method of making optical record carrier, described method comprises: provide at least one to be arranged to by the user profile layer of first radiation scanning; With at least one content information layer is provided, comprise recordable material in the described content information layer so that the district of at least one represent content information to be provided, described district and surrounding medium thereof provide optical contrast to second a different radiation.
In order to understand the present invention better and to illustrate how embodiment of the present invention are implemented, below will be as an example with reference to the accompanying drawings, wherein:
Fig. 1 is the cross-sectional view of single-sided discs;
Fig. 2 is the cross-sectional view that combines according to the both-sided optical disc of the content information layer of first embodiment of the present invention;
Fig. 3 A-3F is the possible exemplary of content information layer vertical view, and the anisotropic different orientation that constitutes two phases of layer has been described;
Fig. 4 A and 4B have illustrated two different shapes mutually of content information layer;
Fig. 5 A and 5B are respectively the sketches that is used in according to side chain liquid crystalline polymer in the manufacture method of one embodiment of the invention (SCLCP) and liquid crystal diacrylate C3M;
Fig. 6 has illustrated and has been used to scan the equipment that comprises according to the optical record carrier of the content information layer of one embodiment of the invention.
Fig. 7 is the cross-sectional view that combines according to the both-sided optical disc of the content information layer of another embodiment of the invention;
Fig. 8 is the cross-sectional view that combines according to the single-sided discs of the content information layer of another embodiment of the invention.
The present inventor recognizes, can but not hinder the content information layer or the label layer of the scanning of user profile layer providing one to cover on the user profile layer on the optical record carrier.
This content information layer (or at least some parts of content information layer, be called " district " in this article) be configured to transmission (promptly in a large number reflection or absorb) be used to scan first radiation laser beam of user profile floor.These districts are visible, because they are configured to reflect and/or absorb the second different radiation.Because most of radiation sources (comprising the sun) emission unpolarized radiation, it is fuzzy that described district can seem under surround lighting, because the radiation of at least the second radiation is reflected or absorbs.
Preferably, described district is configured to transmission first radiation, but reflects or absorb all other radiation.In the following time of irradiation that is in second radiation, this can increase the observability in described district.
By described district being arranged to any desired shape or structure (for example character or image), the information of indication CD content or source optical disc or identification CD can be provided, perhaps only provide exhilarating pattern.
Thus, content information layer can be positioned on the both-sided optical disc, and the user profile layer that does not hinder CD is by the radiation scanning of first polarization.
Be appreciated that this content information layer can be applied on any optical record carrier that comprises card and cylinder shape medium, is not limited to CD.In addition, this content information layer for example can be provided on the single face medium so that can both provide information or pattern on two faces of medium, thus or improve the obtainable quantity of information of user, perhaps improves the overall appearance of medium.
Fig. 1 has shown first embodiment according to record carrier of the present invention.A content information layer is provided on the plane of incidence 106.Perhaps, content information layer can be covered by a hyaline layer that embeds base material or be arranged on the user profile layer.Content information in the content information layer is by some district expressions, contains a kind of material that the radiation that is used to scan user profile floor 104 is had high transmission in the described district.Described material has low transmission for the radiation of other wavelength.The suitable material that is used for described district is a dyestuff, and they have very strong wavelength dependency transmission usually.The example of dyestuff and their colors under ambient lighting conditions have:
1,1 '-diethyl-2,2 '-carbocyanine iodide (purple, transparent) to CD, DVD
2-[6-(lignocaine)-3-(diethyl imino group)-3H-xanthene-9-yl] benzoic acid (green, transparent) to CD, DVD, BD
2,3,5,6-1H, 4H-tetrahydrochysene-9-(3-pyridine radicals)-quinolizino-[9,9a, 1-gh] cumarin (yellow, transparent) to CD, DVD
2-(to the dimethylamino styryl)-pyridylmethyl iodide (orange, transparent) to CD, DVD
2-(to the dimethylamino styryl)-benzothiazolyl ethyl iodide (redness, transparent) to CD, DVD, BD
Wherein CD is compact disk (first radiation wavelength is 780nm), and DVD is digital multi-purpose CD (first radiation wavelength is 650nm), and BD is Blu-ray Disc (first radiation wavelength is 405nm).
Because these dyestuffs can add in the matrix, so they do not have materially affect to optical path length with very little amount.Therefore, the path-length error that caused of the optical path length difference that is caused by dyestuff can be ignored.In addition, can be chosen in to a great extent dyestuff near substrate refractive index.
Fig. 2 has shown the CD 2 according to another embodiment of the invention.Content information layer can be an on-chip protective seam, for example in layer 107 among Fig. 1 or the substrate Anywhere layer or be set directly at layer on the user profile layer.In the embodiment of Fig. 2, content information layer has substituted the protective seam and the substrate of CD.In Fig. 2, CD 2 is two-sided, so it has two independent user Information Level 4a and the 4b that is positioned at separating layer or substrate 5 both sides.Content corresponding Information Level 3a, 3b cover on each user profile layer 4a, 4b.Each user profile layer 4a, 4b are by providing one to pass the polarized radiation bundle that corresponding plane of incidence 6a, 6b incide on corresponding user profile layer 4a, the 4b and scan.
This band has the content information layer in the district of dependence-dependence transmission can be realized by several method.
Usually, this layer meeting by continuous first phase (matrix) have continuously with one, have continuously or preferably altogether dispersing character second mutually (form on little farmland) form.A zone of second phase is the district, and a zone of first phase is the medium around this district.At least one is anisotropic in the two-phase, and is birefringence, for example liquid crystal (LC).Described two-phase can be formed (state difference, or orientation difference) by homogenous material, is perhaps formed by two or more independent materials.In Fig. 3 A-3F, schematically describe possible embodiment.
Fig. 3 A-3F has shown the vertical view according to the content information layer 3 of different embodiments of the present invention, and the illustrative embodiments of the form of polarization dependence fringe area is provided.
For example, the anisotropy that constitutes the host material of the first phase 43b in Fig. 3 A is represented with the ring of making fork, thereby is shown that its anisotropy is along extending perpendicular to page plane.On the contrary, the second phase 43b has from left to right the double-headed arrow that extends, and shows that thus its anisotropy crosses the page and extend.In the figure of two intersection of arrows, i.e. 43b ' among Fig. 3 E and the 43a ' among Fig. 3 F, this expression is relevant to be isotropic mutually.
Isotropic material is that its character (in this specifies for refractive index) is not with the material of change in orientation.Anisotropic material is the material that its physical property (being refractive index in this explanation) depends on its orientation.
Coupling or mispairing between the host material and the second phase material refractive index are extremely important.This coupling or mispairing are had a mind to select by the employed material of suitable selection, and can establish in advance or the initial material that uses by for example be separated, (light-initiated) polymerization, thermal treatment, removal material or its combination transform after realization on the spot.
For further being explained, with reference to the example of Fig. 3 A, wherein two-phase all shows anisotropy, for example by they nematic phase or smectic phase in use the LC molecule.The arrangement condition of two-phase satisfies matrix to be made up of vertical orientated LC molecule (representing with the circle of making fork in Fig. 3 A), and disperse phase is by having the LC molecular composition of the planar orientation of orientation from left to right.If select material that the common refractive index of host material and the common refractive index of disperse phase are complementary, if then the linear polarization state of incoming laser beam is parallel to the calibrating direction of the LC molecule in the disperse phase, incoming laser beam just can not stand effective refractive index mispairing.But the mispairing meeting between the common refractive index of matrix and the extraordinary refractive index of disperse phase causes the scattering of this polarization direction.Because the observer can not distinguish different polarization states, so in those have realized as shown in Figure 3A the district of condition, the outward appearance of film will be blured.By making protective seam form pattern, for example produce as shown in Figure 3A the zone of orientation and have the zone of shown in Fig. 3 B, arranging, can on CD, put the visible information of user and the writing and reading of the canned data of each layer below not influencing.Because this principle is all applicable for two faces of both-sided optical disc, thus double memory capacity can be obtained, and need not sacrifice the printing capability (being the information storage capability of user profile layer) of CD.
The foregoing description is used for illustrating design.Perhaps, the common refractive index of matrix phase can be complementary with the extraordinary refractive index of disperse phase, the linearly polarized direction that reverses scattering thus and stood.
Other calibration structure is feasible equally, shown in Fig. 3 C-3F.Have at least one must be the anisotropy location mutually, but no matter second phase--is matrix phase or disperse phase--and need not to be anisotropic.In the isotropic refractive index of supposing isotropic phase and the anisotropy refractive index mutually any one all mated (for example Fig. 3 E and 3F), still observes scattering, though its degree is weaker than the observed scattering of structure shown in Fig. 3 A.
In addition, the form of disperse phase is not limited to drip a shape farmland (shown in Fig. 4 A), can also have continuously (for example interpenetrating networks) or (for example aggregate, aggregation) characteristic altogether continuously, shown in Fig. 4 B.
By external phase (matrix) and the form that has continuously, has continuously or preferably altogether second phase composition of dispersing character (farmland) put down in writing in the literature.
For example, the liquid crystal (PDLC) of the so-called polymer dispersed of forming by the liquid crystal phase (for example shown in Fig. 3 E) of isotropy or anisotropic polymer substrate and dispersion and, for example, at Fergason, J.L., SID Dig.Tech.Pap., described in 16,68 (1985) those.
These systems normally utilize phase detachment technique to produce on the spot.Homogeneous mixture from monomer and inertia liquid crystal, be separated or heat causes that (heat causes and is separated: TIPS), evaporation by cosolvent cause (solvent causes and is separated: SIPS), or by the photochemistry means cause (polymerization or chemistry initiation are separated: PIPS/CIPS).
In these processes, can occur in being separated of the poor district of polymer rich district and polymkeric substance, and can regulate final form exactly according to proper technical conditions.The low-molecular-weight LC of the dispersion that obtains like this can--randomly be different from the arrangement of matrix--with preferred arrangement mutually and utilize for example electric field or magnetic field regelate.
Other combination of inertia or active LC and polymkeric substance has also had record, for example combination of LC and flexomer (Fergason, J.L., SID Dig.Tech.Pap., 16,68 (1985)), side chain liquid crystalline polymer (Coles, H.J., J.Chem.Soc.FaradayDiscuss., 79,201 (1985)), backbone crystal copolymer (Wilderbeek, H., PhD dissertation, Eindhoven University of Technology, (2001); And Wilderbeek, H.T.A., Van der Meer, M.G.M., Bastiaansen, C.W.M., Broer, D.J., J.Phys.Chem.B, 106,12874 (2002)), (isotropy or anisotropy) net structure (Drzaic.P.S., " Liquid CrystalDispersions ", World Scientific, Singapore, 1995, and Hikmet, R.A.M., J.Appl.Phys., 68,4406 (1990)), or polymer beads (the Van Boxtel that disperses, M.C.W., Janssen, R.H.C., Broer, D.J., Wilderbeek, H.T.A., Bastiaansen, C.W.M., Adv.Mater., 12,753 (2000)).Should be noted that embodiment of the present invention are not limited to independent use organic (polymerization) phase, because also can use inorganic phase (Eidenschink, R., De Jeu, W.H., Electronics Letters, 27,1195 (1991)).
Be appreciated that and use various materials to form content information layer, use these materials to form matrix or farmland or district.For example, if desired, the material that forms matrix and/or farmland or district can be a substantially transparent to visible radiation respectively.Perhaps, it is colored that one or more in the described material can be under visible or fluorescent radiation, and for example described material is a dyestuff.A kind of like this color material can be an isotropy or anisotropic.By this dyestuff is provided, can make content information layer with coloured appearance.
The fixing fixing separation from disperse phase of matrix can use above-mentioned technology to realize.For example, with a kind of isotropy or anisotropy (side chain liquid crystalline polymer for example, SCLCP) polymer substrate and a kind of active LC dissolve in the cosolvent, and the assisted evaporative solvent produces the form of expectation, and active LC is used light initiation polymerization mutually and is fixed on the preferred location.
Perhaps, in second non-limiting example, a kind of isotropy or anisotropy monomer mix the formation homogeneous phase with a kind of anisotropy monomer.(for example with photochemistry mode (polymerization), being separated to produce the form of expectation in first kind of monomer one polymerization.Second kind of monomer is subsequently by thermal polymerization.Between these two polymerization procedures, the reorientation of one or two in the two-phase can be randomly for example realizes by external means such as electric field or magnetic field, shearing force, flow field or alignment layer.For this reason, can use the LC material of dielectric anisotropy (Δ ε) with plus or minus.
Can also use " separation mechanism " except that described hot photochemistry mechanism, as the photopolymerization under at different wave length, use the photopolymerization of different polarization states, in polymerization of different temperatures or the like.
In addition, transfer-fixed policy be can also adopt, single order or second order phase transformation or glass transition are used in combination and (for example quench) at a slow speed or fast heating or cooling.
In all cases, can use adjuvant such as thermal initiator, light trigger, inhibitor, free radical scavenger, chain-transferring agent, stabilizing agent, surfactant, sensitizer, adulterant, isotropy or anisotropy (fluorescence) dyestuff or their combination.
The preferred initial alignment of anisotropy phase can be randomly by using alignment layer (for example mechanically calibrated, photochemistry cause), surfactant, electric field or magnetic field, shearing force or flow field to realize.For this reason, can choose wantonly between transparency conducting layer such as indium tin oxide layer and accompany protective seam, it can randomly be covered by described alignment layer.
Based on the instruction of this paper, the whole bag of tricks of making content information layer for a person skilled in the art is conspicuous.To narrate four kinds of optional methods making this layer below, relate to the manufacturing of optical data memory such as CD.
In this first embodiment, in optical data memory, have on the outermost layer (for example metal) of reflectivity function and placed an alignment layer.The calibrating direction of alignment layer comes machinery to cause by friction calibration layer in a circular motion.This can realize by rotary substrate when for example flannelette contacts with the equipment of implementing calibration.Subsequently, apply a separation layer by precalculated position deposition spacers (for example thin foil, bead or bar randomly are embedded in the cementing agent) different at the edge of CD and/or on CD, it is determining the final thickness of anisotropic band.
Then, the potpourri of deposition active liquid crystal of a kind of low-molecular-weight (LC) and side chain liquid crystalline polymer (SCLCP) shown in Fig. 5 A, covers on the alignment layer on optical storage media.
The active LC of described low-molecular-weight is that positive LC monomer or monomer mixture formed by a kind of Δ ε, it can form cross-linked network when polymerization, for example LC diacrylate (for example the C3M among Fig. 5 B, a kind of multifunctional LC methacrylate) is perhaps formed with a kind of multifunctional LC thiol-ene monomer.Described side chain liquid crystalline polymer generally becomes polymkeric substance by a kind of thermic that had glass transition before one or more enantiotropic LC phases and constitutes, and transition temperature is lower than the softening or degradation temperature of optical data memory substrate.What add in low-molecular-weight LC monomer is light trigger and/or other adjuvant as herein described.Described potpourri can deposit at this point, for example as the potpourri that is separated, also can be used as a kind of isotropic potpourri deposition, succeeded by the fast or slowly evaporation of cooling or cosolvent, to form the form of expectation.
Then, placing reusable substrate and extruding on this potpourri in the motion that this substrate and optical data memory are limited in causing owing to spacer, have on the wherein said reusable substrate structurized transparency electrode (tin indium oxide for example, ITO) or have the transparency electrode of user with visible picture shape.Preferably on transparency electrode, apply an alignment layer.The deposition of coated electrode can preferably be finished before the form of LC layer forms, and also can finish in its forming process or after forming.Subsequently, can utilize one period stand-by period, randomly combine, to reduce or eliminate existing of disclination in the LC layer with heating steps.
Employing UV causes or heat causes described low-molecular-weight LC component curing, so that fix form that formerly forms or the form that forms expectation by being separated of initiation-initiation on the spot.Under one situation of back, final form is by Several Parameters such as polymerization kinetics decision, and can be subjected to the influence of the variation of the variation of conditions of exposure (radiation intensity, time shutter) for example or hot state (temperature, time).
The LC layer of formed single shaft calibration is made of mutually the separation with identical refractive index, and the two remains transparent for laser beam and user for it.Desired part is to cause by applying electric field and heat this layer to the temperature (far below the softening or degradation temperature of medium) that SCLCP presents middle phase simultaneously on the LC layer with square refractive index mispairing.The side chain substituents of SCLCP will be along the line of electric force reorientation and the mispairing of formation refractive index of electric field, and it is fixed by slowly or fast cool off the LC layer when keeping electric field.In case formed new local orientation and temperature under the glass transition temperature of SCLCP, just can remove electric field.
Please note that electric field and thermal field can for example apply by the patterning of electrode or by the selectivity addressing of electrode or by the heat distribution of using the laser beam that focuses on partly.Electric field is applied between dismountable top electrode and information (metal) layer.
At last, can randomly remove electroded substrate or it is used further to another substrate to improve repeatability and to reduce cost, the data storage medium of current content Information Level can randomly cover with protective seam.Above-mentioned institute can carry out to improve manufacturing speed simultaneously to two faces in steps.
Similar to method 1 described situation, use the potpourri of two kinds of different activities liquid crystal with positive dielectric anisotropy, wherein monomer can be separately and polymerization independently.For this reason, a kind of LC component can be for example by (for example using salt cation ground to epoxide, oxetanes or vinyl ether photochemically, or acrylate, methacrylate or thiol-ene being used I type or I I type radical initiator) monomer of polymerization forms, and another kind of component is made up of LC monomer that can heat (for example free radical polymerization of thermal initiator initiating methacrylates, methacrylate, vinyl monomer or thiol-ene) polymerization.
The form that is caused (for example by the form that method obtained described in this instructions) is fixing in the following way: a kind of selective polymerisation in the LC monomer (for example using ultraviolet light), use the electric field that applies by structured electrodes to make the unreacted one or more LC monomer reorientations of residue then, and utilize the fixing unreacted component of different polymerization mechanism (for example temperature raises or uses the light of second wavelength) subsequently.Perhaps, final form obtains in the polymerization process of one or more first kind of LC component.
Similar to method 2 described situations, use one and cause vertical orientated alignment layer.Low-molecular-weight LC partly is made up of LC monomer or LC monomer mixture with negative dielectric anisotropic (Δ ε＜0), wherein said monomer can be separately with independent polymerization.Second still the reorientation of loose phase be to use electric field to realize, the molecule reorientation is a planar orientation when applying electric field.Preferred calibration can randomly be used adulterant, projection or structured electrodes to cause the face internal electric field and implement.
With method 3 described identical situations under, a kind of (fluorescence) anisotropy dyestuff is dissolved in in LC monomer or the monomer mixture one or both.After being redirected,, obtain the visible contrast of user by the different anisotropic absorption xsects generations of anisotropy dyestuff for example according to the step described in the method 3.
One aspect of the present invention comprises the equipment that is used for for example writing to the content information layer of optical record carrier by change to the orientation of expectation mutually with second on the spot on recording medium content information.In this case, optical record carrier comprises a kind of material that can be recorded with the district that expectation is provided.This equipment can play scanning device simultaneously.
Fig. 6 has shown a kind of equipment 1 that is used to scan according to the optical record carrier 2 of one embodiment of the invention.Record carrier comprises hyaline layer 3, is provided with user profile layer 4 in the one side.Carrier comprises an aforesaid content information layer.Content information layer constitutes the part of hyaline layer 3.The user profile layer protects it to avoid environmental impact away from hyaline layer one side by protective seam 5.Hyaline layer is known as the plane of incidence 6 in the face of equipment one side.Hyaline layer 3 is by providing mechanical support to serve as the substrate of record carrier to the user profile layer.
Perhaps, hyaline layer can have the function of protection user profile layer, and mechanical support is provided by a layer that is positioned at user profile layer opposite side, for example provides by protective seam 5 or by another a user profile layer and a hyaline layer that is connected on the user profile layer 4.
User profile can with substantially parallel, with one heart or the mark pattern that can survey of the optics of the track arrangement of spiral be stored in the user profile layer 4 of record carrier, not shown in the drawings.Described mark can be the form of any optical readable, and for example concave point or reflection coefficient or direction of magnetization are different from the form in its zone on every side, or the combination of these forms.
Objective system can comprise one or more camera lenses and/or grid.Objective system 18 has optical axis 19.Objective system 18 becomes convergent beam 20 with light beam 17, is incident on the plane of incidence 6 of record carrier 2.Objective system has one for being fit to the spherical aberration correction that radiation beam passes the thickness of hyaline layer 3.Convergent beam 20 forms a little 21 on user profile layer 4.Formed divergent beams 22 by user profile layer 4 radiation reflected, it is become the collimated then lens 14 of substantially parallel light beam 23 by objective system 18 and becomes convergent beam 24.Beam splitter 13 separates forward and beam reflected by at least a portion to detection system 25 transmission convergent beams 24.The detection system capture radiation also converts it into electrical output signal 26.Signal processor 27 changes into various other signals with these output signals.
Wherein a kind of signal is a user message signal 28, and its value is being represented the user profile of reading from user profile layer 4.Described information signal is handled with error correction 29 by information process unit.Other signal from signal processor 27 is focus error signal and radial error signal 30.Focus error signal represent a little 21 and user profile layer 4 between axial difference in height.Radial error signal is illustrated in the plane of user profile layer 4 distance at the center of the track on above-mentioned some institute edge in the point 21 and user profile layer.
Focus error signal and radial error signal are transfused to servo circuit 31, and servo circuit 31 changes into these signals respectively the servo-control signal 32 that is used to control focus actuator and is used for radial actuator.Actuator does not show in the drawings.The position of focus actuator control objective system 18 on focus direction 33, thus the physical location at reference mark 21 makes it overlap substantially with the plane of user profile layer 4.Radial actuator control object lens 18 are in the position on 34 radially, thereby the radial position at reference mark 21 overlaps the center line of the interior track that will the edge of it and user profile layer 4 substantially.Described in the drawings track spreads along the in-plane perpendicular to figure.
Scanning device in this this specific embodiments also is suitable for scanning the second class record carrier with hyaline layer thicker than record carrier 2.This equipment can use radiation beam 12 or the radiation beam with different wave length to scan the second class record carrier.The NA that can adjust this radiation beam is fit to the type of itself and record carrier.The spherical aberration compensation of objective system also must adjust accordingly.
The radiation laser beam that incides on the optical record carrier 2 has predetermined polarization.This can realize by many methods, for example can place polarizer in any point in beam channel.But, in most of the cases, use laser big (for example laser diode) to make radiation source 11, laser instrument generally produces the radiation beam of linear polarization.
By an aforesaid content information layer is provided, embodiment of the present invention allow such layer to be applied on face of two-sided optical record carrier or two faces and do not hinder the user profile layer from the optical record carrier to read information.This makes identification carrier rapidly and/or be stored in user profile on the carrier.
Fig. 7 has shown another embodiment according to record carrier 702 of the present invention.A content information layer 706 is provided on the plane of incidence of substrate 703.Content information layer have a zone and comprise a plurality of substantially uniformly-spaced and be essentially subregion 706r, the 706g of body color.The suitable material of colored subregion is the printing ink point of for example heavy colour, and they launch widely.Printing ink point preferably has zero or almost nil transmittance for first radiation.Also can use and under first radiation wavelength, have enough absorptive heavy colour dyestuff.In the explanation of Fig. 1, mentioned the example of dyestuff.Described colored subregion 706,706r, 706g size preferably are at 75-20000 μ m
2Between.They can substantially ringwise or have another shape as square, rectangle or cellular.Colored subregion is selected to account for the 10-30% in whole contents Information Level district, and flatly is deployed in basically in the whole contents Information Level district.This number percent can be called coverage.In the embodiment of Fig. 7, the surface area of annular printing ink point is about 314 μ m
2, corresponding to the radius r of 10 μ m, and equidistantly 5*r=50 μ m ground is arranged.Produce π/5 thus
2=12.5% coverage.Printing ink o'clock is zero to the transmittance of first radiation.Therefore this number percent also the represent content Information Level to the transmittance of first radiation.Diffraction effect is not considered, can ignore.The height of printing ink point generally is about 5-20 μ m, is about 5 μ m in this embodiment.The dot matrix of printing ink point 706 is represented visual picture 706g, 706r, because not every printing ink point all has same color.In the embodiment of Fig. 7, content information layer 706 (with opposite side 706) be deposited on substrate 703b and the 703a.Deposition can be implemented by known deposition printing technology such as brush plating, serigraphy and ink jet printing.In Fig. 7, CD 702 is two-sided, so it has the user profile layer 704a and the 704b of two separation that are positioned at separating layer or substrate 705 both sides.Each user profile layer 704a, 704b are by providing one to pass corresponding content information layer 706 and be incident on radiation beam scanning on each user profile layer 704a, the 704b.
Shown another embodiment according to optical record carrier of the present invention in Fig. 8, wherein content information layer 806 comprises a plurality of layering 806g, 806r, 806p, 806b and 806y to the transparent substantially on an equal basis different colours of first radiation.The thickness of colored layering is generally about 2 μ m.Visible image is represented in colored layering, for example label.User profile layer 804 passes content information layer 806 and incides first radiation laser beam 810 scanning on the user profile layer 804 by providing.Content information layer 806 at the optical thickness that has basic homogeneous under first radiation wavelength not hinder under first radiation wavelength from user profile layer 804 read message of optical record carrier or write information upwards.This is that existence by an optically transparent basically plane protective seam 806t away from user profile layer 804 realizes.Protective seam is enough thick in to obtain smooth upper surface, flattens in the contrast and the gap that are about between the colored subarea.The gross thickness of colored subarea and protective seam can for example be 2-3 μ m, but does not get rid of other thickness.Also there is extra layer 805, is used to protect user profile layer 804.Additional layer 805 can also comprise second half (mark 706 of contrast Fig. 7) that has according to the both-sided optical disc of second content Information Level of the present invention.Layering 806g-806y is colored, and deposits by known printing technology according to the visible image of expectation.Protective clear layer 806t can be by for example spin-on deposition.
Claims (22)
1. an optical record carrier comprises at least one content information layer and is arranged to see through described content information layer at least one user profile layer by first radiation scanning; Content information layer comprises the district of at least one the represent content information that is positioned at surrounding medium, and described content layer is transparent for described first radiation, and described district and surrounding medium provide the visual contrast of optics to second a different radiation.
2. according to the optical record carrier of claim 1, wherein said at least one district has to first transmission of described first radiation with to the second lower transmission of described second radiation.
3. according to the optical record carrier of claim 1 or 2, wherein said first radiation has first predetermined wavelength, and second radiation has the second different wavelength.
4. according to the optical record carrier of claim 1 or 2, wherein said first radiation has first predetermined polarisation, and second radiation has the second different polarizations.
5. according to the optical record carrier of claim 4, wherein said district comprises at least a birefringent material, the arrangement of birefringent material is satisfied the radiation of second polarization and experience at least two different refractive indexes when being passed content information layer, and single refractive index is only experienced in the radiation of first polarization basically when passing content information layer.
6. according to the optical record carrier of claim 5, wherein said birefringent material is dispersed in the host material.
7. according to claim 1,2,3 or 4 optical record carrier, wherein said content information layer comprises dyestuff.
8. according to the optical record carrier of claim 4, wherein said dyestuff is a birefringence.
9. according to the optical record carrier of claim 1, wherein said district satisfy following situation at least one so that visible content information to be provided to the user: form pattern and arrange in a predefined manner.
10. according to the optical record carrier of claim 9, wherein said content information layer has a zone and comprises a plurality of basic equi-spaced apart and opaque substantially colored subarea.
11. according to the optical record carrier of claim 10, the size in wherein said colored subarea is at 75-20000 μ m
2Between.
12. according to the optical record carrier of claim 11, wherein said colored subarea accounts for the 10-30% of content information layer region sum, and substantially flat be deployed in the whole contents Information Level district.
13. according to the optical record carrier of claim 9, wherein said content information layer comprises a plurality of for first radiation layering of same transparent different colours basically.
14. optical record carrier according to claim 13, wherein said content information layer has the optical thickness of basic homogeneous under first radiation wavelength so that when writing on the user profile layer at optical record carrier under first radiation wavelength or therefrom reading information with the minimum interference of the optical wavefront of focused laser beam.
15. according to the optical record carrier of claim 14, wherein said content information layer further comprises back to the optical clear basically of described at least one user profile layer and smooth protective seam.
16. according to the optical record carrier of claim 9, wherein said content information layer is included in the dielectric layer that has antireflective property under first radiation wavelength, these dielectric layers are represented content visible information.
17. according to the optical record carrier of claim 1, wherein said optical record carrier is two-sided, all has the user profile layer on the meaningful Information Level of at least one mask and each face.
18. according to the optical record carrier of claim 1, comprise at least one district, wherein said district combine in claim 6,7,8,9,10,11,12,13,14,15,16 or 17 the layout at least two or more.
19. optical record carrier, comprise at least one content information layer and be arranged to see through described content information layer at least one user profile layer by first radiation scanning, thereby comprise a kind of material that pattern is provided at the district of at least one the represent content information in the surrounding medium that is recorded as in the content information layer, described content layer is that transparent and described district provides optical contrast with surrounding medium to second a different radiation to described first radiation.
20. write the equipment of content information in the content information layer that a kind is used on optical record carrier, described optical record carrier comprises:
At least one content information layer sees through described content information layer at least one user profile layer by first radiation scanning with being arranged to, and comprises recordable material in the content information layer;
Described equipment is arranged to the described material of recorded content Information Level so that at least one district with pattern mode represent content information is provided, and described district and surrounding medium thereof provide optical contrast to second a different radiation.
21. method that is used in optical record carrier, writing content information, described optical record carrier comprises: at least one content information layer sees through described content information layer at least one user profile layer by first radiation scanning with being arranged to, and comprises recordable material in the described content information layer;
Described method comprises the described material of recorded content Information Level so that the step in the district of at least one represent content information is provided, and described district and surrounding medium thereof provide optical contrast to second a different radiation.
22. a method of making optical record carrier, described method comprises: provide at least one to be arranged to by the user profile layer of first radiation scanning; With at least one content information layer is provided, comprise recordable material in the described content information layer so that the district of at least one represent content information to be provided, described district and surrounding medium thereof provide optical contrast to second a different radiation.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP03102336 | 2003-07-29 | ||
| EP03102336.9 | 2003-07-29 | ||
| EP03104424.1 | 2003-11-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1830029A true CN1830029A (en) | 2006-09-06 |
Family
ID=36947563
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2004800217925A Pending CN1830029A (en) | 2003-07-29 | 2004-07-26 | Content information layer for an optical record carrier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1830029A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102610246A (en) * | 2011-01-20 | 2012-07-25 | 索尼公司 | Recording medium and method for manufacturing recording medium |
-
2004
- 2004-07-26 CN CNA2004800217925A patent/CN1830029A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102610246A (en) * | 2011-01-20 | 2012-07-25 | 索尼公司 | Recording medium and method for manufacturing recording medium |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109154770A (en) | Transparent membrane, transparent screen and image display system and transparent poster | |
| JP2006127707A (en) | Aperture controlling element and optical head device | |
| CN1825448A (en) | Optical recording medium and displaying method on surface of the medium | |
| JP2008020538A (en) | Hologram recording material, hologram recording medium and method therefor | |
| CN107111029B (en) | Optical component and image display device with optical component | |
| CN1287355A (en) | Optical recording medium and recording and/or playback method and apparatus using optical recording medium | |
| JP2006221070A (en) | Reflection type screen | |
| JP4469336B2 (en) | Information recording medium, manufacturing method thereof, recording / reproducing method, and optical information recording / reproducing apparatus | |
| CN1732472A (en) | Controllable two layer birefringent optical component | |
| JP2007102185A (en) | Optical recording medium, method of producing same, optical recording method and optical reproducing method | |
| TWI309820B (en) | ||
| CN1830029A (en) | Content information layer for an optical record carrier | |
| JP4807049B2 (en) | Hologram recording medium and hologram recording method using the same | |
| JP2007500409A (en) | Content information layer of optical record carrier | |
| JP4154132B2 (en) | Optical information recording medium | |
| CN101064125A (en) | Optical disk and recording method of visible figures into optical disk | |
| CN1625716A (en) | Multilayer combined liquid crystal optical memory systems and method for recording and reading information | |
| CN1662974A (en) | Optimized medium with anisotropic dipole emission for fluorescent single or multi layer storage | |
| CN1180411C (en) | Optical recording medium and optical recording method | |
| US20070147213A1 (en) | Optical information carrier containing bragg reflectors | |
| WO2023101002A1 (en) | Liquid crystal diffraction element, image display device, and head-mounted display | |
| TW200809839A (en) | Optical information recording medium and object drawing method for optical information recording medium | |
| CN1732520A (en) | Birefringent optical component | |
| CN1662967A (en) | Optical data storage | |
| CN1922672A (en) | Optical recording medium comprising molecules with hydrogen bonds |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CI02 | Correction of invention patent application |
Correction item: Priority Correct: 2003.11.27 EP 03104424.1 False: Lack of priority second Number: 36 Page: The title page Volume: 22 |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: PRIORITY; FROM: MISSING THE SECOND ARTICLE OF PRIORITY TO: 2003.11.27 EP 03104424.1 |
|
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |