Fluorescent substance and method for manufacturing an optical disk based on said substance

FIELD: technologies for manufacturing optical disks for storing information, in particular, development of fluorescent substance and method for manufacturing WORM-type optical disks based on it.

SUBSTANCE: fluorescent multilayer substance on basis of organic dyers with polymer linking component for optical data storage disks of type WORM with fluorescent reading, in accordance to first variant, has two-layered light-sensitive polymer composition inside a track, formed in transparent film made of refractory polymer. First layer has hard solution of fluorescent dyer. Second layer is a combined solution of light absorbent and fluorescence extinguisher. Polymer linking component belonging to first layer has substantially reduced melting temperature in comparison to polymer linking component belonging to second layer. In accordance to second variant, fluorescent multilayer substance is made sensitive to polarization of laser beam, enough for controlling processes of reading and recording information in a fluorescent WORM disk due to polarization of laser beam. Also provided is method for manufacturing one-layered optical disk of type WORM, basically including forming of a fluorescent layer in two stages. Firstly, lower semi-layer is formed, containing fluorescent dyer, and then - upper semi-layer, containing non-fluorescent dyer, or at the beginning lower semi-layer is formed, containing non-fluorescent dyer, and then - upper semi-layer, containing fluorescent dyer. Non-fluorescent dyer is selected in such a way, that its absorption area mainly coincides with spectral absorption area and/or fluorescence area of fluorescent dyer.

EFFECT: improved efficiency of recording/reproducing systems and information preservation on basis of WORM-type optical disk with fluorescent reading.

3 cl, 2 dwg, 3 ex

 

The invention relates to the field of optical disks to store information and more precisely relates to a fluorescent medium and manufacturing method on the basis of single-layer and multilayer optical disk WORM with fluorescent reading.

In the last few years, in the prior art has entered the optical storage device of type WORM (write-once-read-many - once to write, read many times), on which information can be written in a form that can be read immediately after writing. This feature is the recording of information in real time is very important to use an optical recording in different memory devices, in particular, and mainly for computer systems. This area requirement is high trainwest information is not very important. Wheels type WORM provide a high capacity optical memory and its performance, including three-dimensional optical memory.

The basis of all practical interest optical storage devices type WORM on the principle of photothermal recording. The recording of information on the materials such devices is performed by scanning the recording layer of the focused laser beam. The laser beam energy is absorbed by the active medium layer and is converted into thermal energy, causing its physico-hee is practical changes when reading, you can register optically.

In principle you can use and photonic effects, ie, detectable by optical methods change the state of the material, caused by direct interaction of photons with this material. Attempts applications for photonic account on WORM disks photochromic, dichroic and other materials. However, to date, WORM optical disks using any of photon recording mechanism practical application not found. This is probably due to the fact that the photon recording, unlike photothermal, when using the same laser (but with different power pulse) for recording and reading is not the threshold of nature and therefore do not provide the required stability properties of the material during repeated reading. In accordance with the mechanisms of thermally induced effects of photothermal recording on WORM optical materials suitable for practical use can be divided into two types:

1. Ablative, characterized by the fact that during melting, evaporation or chemical transformations thin active layer, there occur the geometric changes that can be registered optically.

2. Using phase transitions, in which the geometric changes active the Loya does not occur, but change its optical properties, resulting in optical contrast, which for materials of this type are usually low.

Among the various types of materials for ablative recording significant attention WORM optical disks, in which the recording medium used thin (10-100 nm) layers of organic dyes or without a binder, and a polymer binder (dye-in-polymer). Layers of organic dyes have a number of significant advantages compared to, for example, with metal and semimetal layers used in WORM drives with ablative recording. These benefits can include the following properties.

The dyes may have a stronger selective absorption at the wavelength of the recording laser.

Layers of dyes are more sensitive to laser radiation because of their low thermal conductivity and low melting point or decomposition, and therefore they can achieve higher recording density.

Layers of dyes possess a higher stability at high humidity.

- Material layer-based dyes is achieved by increasing the value of the signal-to-noise, as the noise of the amorphous layers is practically absent.

- Layers can be made simple and cheap method of applying pokr is involved in the centrifuge, and not by vacuum deposition, which is used in the manufacture of WORM drives with metal and semimetal layers.

The capacity of current optical disk WORM-based organic dyes reaches 3.5 gigabytes. For drives WORM with one recording layer specified capacity optical memory, apparently, is marginal. In any case, it is limiting when using a diode laser with a wavelength of 780-830 nm.

A further increase in capacity optical disk WORM possible using the native three-dimensional optical memory in which is multi-layered information recording and fluorescent reading. Such devices are known in the art and are described in the following sources:

Astoria, Pimentoes, Opt. comms., t, p.1-6 (1997); Bgosh. Provisional application U.S. filed 08.05.97, No. 25457.

Based systems three-dimensional optical memory with fluorescent reading on the principle of recording information by photoinduced quenching or education media fluorescence reading is carried out by photoexcitation of the media.

The principal feature of all of these so-called photothermal methods is that when reading, you may experience unwanted (parasitic further record. Especially significant this unwanted entry can be in the conditions, when the recording and reading is performed by the light photoexcitation with the same wavelength.

Completely overcome this drawback by creating a threshold effect on the intensity of photoexcitation, i.e. under conditions when the record is intense photoexcitation, and the reading is weak, so weak that the effect of unwanted records practically not significant.

By way of implementation of a threshold effect for the optical memory systems with fluorescent reading is to create conditions in which when reading cannot occur processes that occur under conditions of intense excitement when recording.

The present invention is a technical problem to improve the efficiency of the system read/write and store information on the basis of the optical disk WORM with fluorescent reading.

The problem is solved through the development of media for optical storage discs type WORM with fluorescent reading and method of manufacturing single-layer and multi-layer discs on the basis of this environment, in which the effect of the above negative factors is minimized, in particular, creates a threshold effect on the intensity of photoexcitation.

Under the crust is asego of the invention, there are three types of environments for a drive WORM and systems for three-dimensional optical memory with fluorescent reading on the basis of phase transitions with similar threshold effect. In the proposed environments used the following physical and chemical phenomena:

1) photoinduced phase transition, which occurs or disappears a new phase in which made possible the formation or destruction of fluorescent media;

2) photoinduced thermal decomposition of the so-called energy substances, leading to radical chain decomposition reaction of the fluorescent media;

3) photoinduced thermal dissociation of cyanine dye, which tusitala fluorescence of the fluorescent medium.

Specifically, the technical problem underlying the invention is solved due to the fact that the proposed fluorescent multilayer medium based on organic dyes with a polymeric binder for optical storage discs type WORM with fluorescent reading with a diameter of 80 mm, 120 mm, 200 mm, 300 mm, or any other diameter, comprising at least two-layer photosensitive polymer composition in the track formed in the transparent film of high-melting polymer, the first layer comprises a solid solution of fluorescent dye, and the second layer is a joint solution absorber of light and tusitala fluorescence of the polymeric binder of the first layer significantly lower is the melting temperature, than the polymer binder of the second layer. Preferably, the fluorescent dye according to the invention selected from the group consisting of xanthene dyes groups eosin and rhodamine, acridine, oxazinone, azine stains, Pereladova, violationsin, cyanine, phtalocyanines, indigoid dyes, porphyrins, and the content of the fluorescent dye in the layer is 0.1-10% wt. Preferably, the film forming polymer selected from the group consisting of polyvinyl butyral, polyvinyl acetate, copolymers and plasticizers, and as plasticizers used esters talavou acid. Also preferably in the joint solution as a light absorber used as a compound selected from the group consisting of effluorescence lightfast colored organic or coordination compounds, the maximum absorption bands which lies near the wavelength of the recording laser radiation, and as tusitala fluorescence used as a compound selected from the group consisting of acceptor excitation, which are used effluorescence dyes, coordination compounds, thermochromic holograms, photochrome or similar compounds, electron acceptors, which are used organic nitro compounds, halogen-substituted uglev Dorada quinones, coordination compounds of acids, bases and other compounds able to extinguish the fluorescence. Also preferably, in the composition containing the fluorescent dye layer further introduced afluorescent dye, the spectral absorption region which overlaps the spectral region of the absorption and/or fluorescence of the fluorescent dye. This environment is preferably performed with a polarization parallel to the polarization direction of the laser beam, which when used, there is an increase in fluorescent signal in the WORM drive, and the polarization layer with a fluorescent dye can be done by imposing an electric field in the process of photopolymerization of the photosensitive composition. Preferably the specified environment is made so that the first layer contains at least one additional fluorescent dye, and the first fluorescent dye is a donor of electron energy and is able to absorb light of a reading laser, and the additional dye is an acceptor of electron energies and capable of emitting fluorescence detected by the photodetector, and both the donor and the acceptor is selected from the group consisting of xanthene dyes groups eosin and rhodamine, acridine, oxazinone, asin is o, Pereladova, philantropic, cyanine, phtalocyanines, indigoid dyes, coumarin derivatives, and porphyrin, which occurs the phenomenon of transfer of electronic energy to increase the magnitude of the fluorescent signal.

The task is also solved due to the fact that the proposed multi-layer fluorescent medium based on organic dyes with a polymeric binder optical drive type WORM with fluorescent reading, including at least one layer containing a fluorescent dye capable of absorbing the recording laser light, and at least one layer containing afluorescent dye, causing the quenching of fluorescence fluoresceine dye, and as a polymeric binder in both layers use the same film-forming polymer, which has high transparency, low thermal conductivity and provides a quantum yield of fluorescence of the dye, sufficient for its registration by the reader. Preferably fluorescent dye selected from the group consisting of xanthene dyes groups eosin and rhodamine, acridine, oxazinone, azine stains, rellenong, violationsin, cyanine, phtalocyanines, indigoid dyes, coumarin derivatives, and porphyrin, and the content of the fluorescent dye in the layer is 0.1-10 wt. -%

Film-forming polymer is preferably selected from the group consisting of cellulose ethers, ethers of cellulose, vinyl resins, acrylic resins, chlorinated polyvinyl chloride and copolymers of polyvinyl chloride. As the cellulose ethers may be selected compounds from the group consisting of nitrocellulose, cellulose acetate and acetobutyrate cellulose. Ethers of cellulose may be selected from the group consisting of methyl cellulose, ethyl cellulose and Boticelli. Vinyl resins may be selected from the group consisting of polyvinyl acetate, polyvinylbutyral, polyvinylacetal, polyvinyl alcohol and polyvinylpyrrolidone. Acrylic resin can be selected from the group consisting of polymethylmethacrylate, polymethylacrylate, polymethacrylic acid, polyacrylamide and polyacrylonitrile.

The task is also solved due to the fact that the proposed fluorescent multilayer medium based on organic dyes with a polymeric binder for optical storage discs type WORM with fluorescent reading, characterized in that it is made sensitive to the polarization of the laser beam, sufficient to control the processes of recording and reading information in fluorescent WORM drive due to the polarization of the laser beam. Preferably it is made with who is a very useful application depolarization of the laser beam when reading information to increase the fluorescent signal in the WORM drives, moreover, the possibility of depolarization can be achieved either through the installation of depolarizer in fluorescence drive, either by application of the depolarizer in the form of thin films on a WORM disk. Also preferably it is arranged to read from different layers in the case of its use in multilayer fluorescent WORM drive. In addition, the proposed environment can be performed with the use of depolarization of the laser beam when information is recorded for the increase in fluorescent signal in the WORM drive. Preferably proposed environment contains a mixture of at least two dyes capable of nonradiative energy transfer.

The task is also solved due to the fact that the method of manufacturing a single-layer optical disk WORM, in that a fluorescent dye is dissolved in an organic solvent chosen from alcohols, ketones, amides, sulfoxidov, esters and ethers, halogenated aliphatic hydrocarbons or aromatic solvents or solvent is introduced into the solvent in the form of microcapsules of a size not more than 0.2 μm, prepared by known methods, and then the resulting composition is applied by centrifuging, roller application or immersion on the surface of glass, polycarbonate or the polymerase is immutability substrate for the formation of the fluorescent layer. Preferably in the method of manufacturing according to the invention fluorescent dye selected from the group consisting of xanthene dyes groups eosin and rhodamine, acridine, oxazinone, azine stains, Pereladova, violationsin, cyanine, phtalocyanines, indigoid dyes and porphyrins.

The task is also solved due to the fact that the method of manufacturing a single-layer optical disk WORM, consisting in the fact that on the surface of the substrate to form a fluorescent layer in two stages, with or form the bottom polylog containing fluorescent dye, and then the top polylog containing afluorescent dye or first form the lower polylog containing afluorescent dye, and then the top polylog containing fluorescent dye. Preferably in the method of manufacturing according to the invention using glass, polycarbonate or polymetylmetacrylate substrate, and a fluorescent dye selected from the group consisting of xanthene dyes groups eosin and rhodamine, acridine, oxazinone, azine stains, Pereladova, violationsin, cyanine, phtalocyanines, indigoid dyes and porphyrins. In addition, afluorescent dye is preferably chosen so that the absorption perekryvala the spectral region of the absorption and/or fluorescence of the fluorescent dye.

The task is also solved due to the fact that the method of manufacturing the multilayer optical disk WORM, consisting in the fact that single-layer discs obtained previously described methods, are glued to one another with formation of a layered system in which two or more fluorescent layer alternating with a separating layer of the substrate.

In the following description, the person skilled in the art will understand the characteristics and advantages of the present invention. Description being with reference to the accompanying figures of drawings, on which:

figure 1 depicts schematically the arrangement of the layers in the optical disk WORM with two-phase light-sensitive material;

figure 2 - relative location of the absorption bands and the luminescence for two-phase light-sensitive material for different ways of reading.

For records and information on a multilayer fluorescent laser disks type of WORM can be used in the photosensitive materials and the processes responsible for the fire or the appearance of fluorescence, which is able to provide the following characteristics of storage devices:

1) record the information should be carried out under the action of laser radiation, the exposure duration which is approximately 100 NS;

2) guaranteed lifespan is ü store the recorded data to exceed 5 years;

3) when recording information as a result of quenching the fluorescence intensity of the disk should fall more than 3 times;

4) the dependence of the recording speed, a measure which can serve as the value of 1/τZapZapthe time required to write data)from the recording power of the laser beam (I) must have a threshold character, that is,

The threshold value of the recording power of the laser beam (Ithen) must not exceed 15-18 mW. Condition (1) allows you to spend more than 105acts of reading when the power of the laser beam I<Ithen.

For recording information on a multilayer disks can also be used in processes characterized by a power-law dependence of the 1/τZapfrom the power of the laser beam I, that is:

If n>4, the process will satisfy the conditions (4) and (5), which are similar to the conditions (1) and (2) for threshold processes

The above conditions (1)-(5) can satisfy two types of materials, summarised as two-phase and energy-intensive materials, which will be described below.

Two-phase materials referred to as materials in which there is a photo is induzirovanny phase transition, when it appears or disappears, a new phase, in which made possible the formation or destruction of fluorescent media. Figure 1 schematically shows a section of an optical disk WORM, which shows the arrangement of layers in a multilayer environment. In fluorescent optical disks of the type WORM is requested to complete the two-layer light-sensitive polymer composition track (with a protective layer 4) with transparent sufficiently high melting polymer (e.g. polycarbonate) base 1 or the substrate. One of the layers of this light - sensitive material of the fluorescent layer 3 is a solid solution of the corresponding fluorescent dye (phosphor), and the other layer 2 containing cositel and the light absorber is a joint solution absorber of light and tusitala fluorescence. The polymeric binder for the first layer should have a substantially lower melting temperature than the second. Selection of compositions of polymer compositions with the desired melting temperature, viscosity and other rheological characteristics is carried out by use of suitable polymers (polyvinylbutyral, polyvinyl acetate and their copolymers) and plasticizers (esters of phthalic acid).

As fluorescent dyes (phosphors) use of fluorescent bodies is practical dyes, which have a high quantum yield of fluorescence in concentrated (up to 0.1 mol/l) solutions (derived perylenetetracarboxylic acid).

In the second layer as quenchers can be entered:

- acceptors excitation (effluorescence dyes, coordination compounds, thermochromic holograms, photochrome and other compounds);

the electron acceptors (organic nitro compounds, halogen-substituted hydrocarbons, quinones, coordination compounds, and the like);

acids;

- base, as well as other substances that can extinguish the fluorescence of any physical or chemical mechanism.

The light absorbers are effluorescence lightfast colored organic or coordination compounds, the maximum absorption bands which lies near the wavelength of the recording laser radiation.

To eliminate the dark migration the above reagents store the information it is supposed to link the above reagents and polymer-based ionic or covalent bonds, which will increase as the retention periods laser discs, and retention of recorded information. First preference will be given ion associates because they dissociate during melting of polymers, which promotes more rapid transfer t is sites in the fluorescent layer.

Layer of photosensitive material reproduction and recording of information can be carried out by laser radiation with the same wavelength or different wavelengths. In the first case, the reproduction and recording of information is performed by laser radiation of different capacity: 2-3 and 12 to 18 mW.

As an example, consider the processes of recording information using the acceptor excitation as tusitala fluorescence. In Fig. 2 shows a diagram of the relative locations of the absorption spectra and fluorescence components of the two-layer light-sensitive materials for WORM using acceptor excitation as tusitala fluorescence. In the recording mode under the action of the laser beam is strong heating and melting of the polymer layer containing a light absorber and cositel fluorescence. The temperature to which can be heated polymer layer, is calculated by the formula:

ΔT=αβWτ/(Cpm)

where α - the proportion of the laser radiation focused on the track,

β - the fraction of the absorbed light, which is associated with the transmission (T) and optical density (D) in the following proportions:

β=(Io-I)/I=1-T=1 to 10-D,

where Iaboutand I - intensity, respectively, the incident and transmitted through the polymer layer of the light,

W - power La the cluster radiation

τ - recording time,

With the heat capacity of the polymer layer,

m is the mass of the heated polymer segment.

If D=0,1, α=0.2, a=1.7 to 2 kJ/(kg·K), the region with sides of 0.5 μm can be heated to temperatures of about 500 To laser radiation power of 15 mW for the exposure time of 100 NS, which is sufficient for melting the polymer compositions based on vinyl polymers and low molecular weight plasticizers.

The heat accumulated in this volume, partially transferred more fusible fluorescent layer. In the case where the wavelengths of the recording and reproducing beams do not differ, when writing also going though a smaller, but still noticeable heating of the fluorescent layer due to partial transformation of the energy of the absorbed light into heat (due to nonradiative processes and Stokes losses). In the end, both layers melt, and their viscosity may drop to 5-10 MPa·C. Due to the low thermal conductivity of the polymer substrate and the polymer forming the photosensitive layer, the temperature of the heated zone not substantially falls within a few microseconds. During this time, a significant portion of the molecules tusitala enters the fused fluorescent layer due to normal diffusion (under the influence of a concentration gradient) and thermal diffusion (under the influence of the temperature gradient), th is causes a decrease in the fluorescence intensity. If the amount of the fluorescent layer is several times less than the volume of the layer containing a light absorber, the transfer of 10% of the molecules tusitala in the fluorescent layer (when the initial concentration of tusitala 0.1 mol/l) can cause a decrease in fluorescence intensity 3-4 times when the radius extinguishing 25TH.

The thickness of the layers and the composition of the polymer layers are chosen so that the region of the track extinguished fluorescence does not extend beyond the site with the specified size.

The main advantages of the discussed two-layer materials for fluorescent laser disc type WORM are

reliability and simplicity of the processes underlying the recording of information;

- the ability to create materials that are sensitive to light near UV, visible and near IR ranges.

According to the present invention may use the photoinduced thermal dissociation of cyanine dye, which tusitala fluorescence of the fluorescent medium.

The composition of the recording layer in addition to the fluorescent dye is injected afluorescent dye, causing quenching of the fluorescence of the phosphor. Thus, in the initial state before the information recording layer is not fluorescent.

The absence of fluorescence due to the fact that the spectral region of the absorption effluorescence kr is sites overlaps with the spectral region of absorption (option I) or fluorescence (option II) phosphor.

In the case when the absorption spectra of the two dyes overlap concentration aluminasilica dye is selected so that the absorption of the phosphor was minimal. In the case of overlapping spectra of radiation of the phosphor and acquisitions afluorescent dye is implemented inductive-resonant and/or exchange-resonant energy transfer from one dye to another, resulting in quenching of fluorescence.

In the process of recording information, the dye absorbs the laser light, which is transformed into heat, causing discoloration afluorescent dye.

After recording in places subjected to the action of laser radiation, fluorescence occurs.

To implement the option I use the same laser, but with different power impulse to write and read.

In case of option II can be used one laser similarly to the previous or for the account uses a laser with a longer-wavelength band of radiation, than to read.

In all cases, to ensure a threshold effect heating of the active medium in the recording process should lead to discoloration afluorescent dye and not to affect the phosphor. In the process of reading spectral-luminescent properties of the active medium should not change.

Fluorescent to acetel is selected from compounds, related to the xanthene dyes of the eosine and rhodamine groups, acridine, oxazine, azine, perylene, violanthrone, cyanine, phthalocyanine dyes, indigoide colors and porphyrins, coumarins.

As effluorescence dyes are encouraged to use indocyanine, General formula I

where R1, R2, R3, R4, R5, R6 is alkyl, aryl, aralkyl, R3, and R4, R5 and R6 - cycloalkyl

A2 - anthrope, halogen, alkyl, phenyl.

X is an acid residue.

n=0, 1, 2, 3.

The choice of a given class of dyes is due to the fact that they are subjected to thermolysis at a relatively low temperature (150°to 250°C), which may heat up the active medium when recording information. In the process of thermolysis of indocyanine discolored as a result of chemical transformations according to the diagram below as described in Zhigulev K.K., Kolodkin FL, Richina L.D., alperovitch M.A., Gillyflowers I.I. Mass spectrometry polymethine dyes. Dokl. Union RAS, 1974, t, N 2, s-350 and alperovitch M.A., Kolodkin FL, hasin V.T., Richina RD, Medvedev ETC. Thermolysis Quaternary salts 2,3,3-trimethylindolenine and indocarbocyanine. Chemistry of heterocycle. Conn., 1979, N10, s-1361.

To obtain an optical disk with a single recording layer according to the present invention, the latter either directly applied to the substrate or between the substrate and zapisyvaus the layer applied to the intermediate layer, to improve adhesion and mechanical strength and to reduce the loss of heat due to its distribution to the substrate. In addition, the use of the intermediate layer may allow you to apply the composition of the recording layer solvents, aggressive towards the substrate.

In addition, the recording layer may consist of two polymer polusaev, one of which contains the dye, and another compound that generates free radicals, the latter may be located above or below polsloe with dyes.

On the recording layer can be applied to the protective layer or the recording layer can stick another substrate in order to protect it from the external environment and thereby extend its life and improve the reliability of operation.

In the present invention to obtain a multilayer disk, designed for three-dimensional optical memory with fluorescent reading, the above single-layer discs consistently adhered to one another so that the active recording layers alternated with inactive separating layers formed by the substrate. For the formation of the multilayer optical disc using adhesives that provide good adhesion of the bonded surfaces and no shrinkage, does not adversely effect the properties of the recording layers, not reduces the level of the signal-to-noise, transparent to the wavelengths of laser light and fluorescence. Examples of such adhesives include optical adhesives, UV curable by light. For example, you can use available on the market adhesives brands 3-92, UV-71, UV-69, UV-74, the PTS-2, SC-9 (according to the catalog "Summers laboratories").

Recording information on a multilayer disk is produced by successive scans of each recording layer of the focused laser beam. In the same way is reading the recorded information.

Below are specific non-limiting examples of fluorescent medium based on organic dyes with a polymeric binder optical drive type WORM according to the present invention.

Example 1. For production environment for single-layer fluorescent disk prepare for a solution in diazeoam alcohol containing as the film-forming polymer of 2% polyvinylpyrolidone, as a fluorescent dye 0.013% of rhodamine perchlorate LD 700 with the maximum of the absorption spectrum of 660 nm and the maximum of the fluorescence spectrum 683 nm and as absorber 0.013% 4,5,4,5-dibenzo-1,1-dibutil-3,3,3,3-tetramethylpyrrolidine with the maximum of the absorption spectrum of 667 nm. The solution composition was filtered and applied onto a glass disk and dried education among the s with a thickness of 100 nm. When using this environment record produced by a laser with a wavelength of 659 nm, 20 mW, with a pulse duration of 700 NS and a spot diameter of 1 micron. Figure 2 to illustrate schematically shows the curves of absorption and fluorescence L for fluorescent dye 5, absorber 6 light, tusitala 7 fluorescence moments before recording (upper plot) and after burning (lower plot) for two cases: case and for reading and writing information using light of the same wavelength, in case for reading and writing use light of different wavelengths.

Example 2. For production environment for single-layer fluorescent disk prepare for a solution in diazeoam alcohol containing as the film-forming polymer of 2% polyvinylpyrolidone, as a fluorescent dye 0.013% of rhodamine perchlorate LD 700 with the maximum of the absorption spectrum of 660 nm and the maximum of the fluorescence spectrum 683 nm and as absorber 0.013% 4,5,4,5-dibenzo-1,1-dibutil-3,3,3,3-tetramethylpyrrolidine with the maximum of the absorption spectrum of 667 nm. The solution composition was filtered and applied onto a glass disk and dried to form a protection thickness of 200 nm. When using this environment record produced by a laser with a wavelength of 659 nm 20 mW with a pulse duration of 700 NS and a spot diameter of 1 micron.

Example 3. For the manufacture of cf is built for single-layer fluorescent disk prepare for a solution in diazeoam alcohol, containing as the film-forming polymer 2% of a copolymer of polyvinyl chloride and vinyl acetate, as the fluorescent dye rhodamine perchlorate LD 700 with the maximum of the absorption spectrum of 660 nm and the maximum of the fluorescence spectrum 683 nm and as absorber 0.013% hexaphosphate 4,5-benzo-1,1-dibutil-3,3,3"3-tetramethylpyrrolidine with the maximum of the absorption spectrum of 568 nm. The solution composition was filtered and applied onto a glass disk and dried to education environment with a thickness of 100 nm. When using this environment record produced by a laser with a wavelength of 532 nm, 20 mW with a pulse duration of 700 NS and a spot diameter of 1 micron.

1. Fluorescent multilayer medium based on organic dyes with a polymeric binder for optical storage discs type WORM with fluorescent reading, including at least two-layer photosensitive polymer composition in the track formed in the transparent film of high-melting polymer, the first layer comprises a solid solution of fluorescent dye, and the second layer is a joint solution absorber of light and tusitala fluorescence of the polymeric binder of the first layer has a substantially lower melting temperature than the polymer binder of the second layer.

2. Environment according to claim 1, characterized in that Thu is a fluorescent dye selected from the group consisting of xanthene dyes groups eosin and rhodamine, acridine, oxazinone, azine stains, Pereladova, philantropic, cyanine, phtalocyanines, indigoid dyes, porphyrins, and the content of the fluorescent dye in the layer is 0.1-10 wt.%.

3. Environment according to claim 1, wherein the film forming polymer selected from the group consisting of polyvinyl butyral, polyvinyl acetate, copolymers and plastification.

4. Environment according to claim 3, characterized in that as plasticizers used esters talavou acid.

5. Environment according to claim 1, characterized in that the joint solution as a light absorber used as a compound selected from the group consisting of effluorescence lightfast colored organic or coordination compounds, the maximum absorption bands which lies near the wavelength of the recording laser radiation, and as tusitala fluorescence used as a compound selected from the group consisting of acceptor excitation, which are used effluorescence dyes, coordination compounds, thermochromic holograms, ferroni or similar compounds, electron acceptors, which are used organic nitro compounds, halogen-substituted hydrocarbons, quinones, coordination compounds acids, on the ground and other compounds able to extinguish fluorescence.

6. Environment according to claim 1, characterized in that the composition containing the fluorescent dye layer further introduced afluorescent dye, the spectral absorption region which overlaps the spectral region of the absorption and/or fluorescence of the fluorescent dye.

7. Environment according to claim 1, characterized in that it is made with its polarization parallel to the polarization direction of the laser beam, which when used, there is an increase in fluorescent signal in the WORM drive.

8. The medium according to claim 7, characterized in that it is made with the possibility of polarization of the layer of fluorescent dye through the imposition of an electric field.

9. Medium of claim 8, wherein the polarization layer with a fluorescent dye is accomplished by imposing an electric field in the process of photopolymerization of the photosensitive composition.

10. Environment according to claim 1, characterized in that the first layer contains at least one additional fluorescent dye, and the first fluorescent dye is a donor of electron energy and is able to absorb light of a reading laser, and the additional dye is an acceptor of electron energies and capable of emitting fluorescence, recorded the photodetector is m, in this case the donor and acceptor selected from the group consisting of xanthene dyes groups eosin and rhodamine, acridine, oxazinone, azine stains, Pereladova, philantropic, cyanine, phtalocyanines, indigoid dyes, coumarin derivatives, and porphyrin, which occurs the phenomenon of transfer of electronic energy to increase the magnitude of the fluorescent signal.

11. Fluorescent multilayer medium based on organic dyes with a polymeric binder for optical storage discs type WORM with fluorescent reading, characterized in that it is made sensitive to the polarization of the laser beam, sufficient to control the processes of recording and reading information in fluorescent WORM drive due to the polarization of the laser beam.

12. Environment according to claim 11, characterized in that it is made with the use of depolarization of the laser beam when reading information to increase the fluorescent signal in WORM disks.

13. Environment item 12, characterized in that the possibility of depolarization due to installation of the depolarizer in fluorescence drive.

14. Environment item 12, characterized in that the possibility of depolarization due to application of the depolarizer in the form of thin films on a WORM disk.

15. Environment according to claim 11, characterized in that it is made with the possibility of scythianus different layers in the case of its use in multilayer fluorescent WORM disk.

16. Environment according to claim 11, characterized in that it is made with the use of depolarization of the laser beam when information is recorded for the increase in fluorescent signal in the WORM drive.

17. Environment according to claim 11, characterized in that it comprises a mixture of at least two dyes capable of nonradiative energy transfer.

18. A method of manufacturing a single-layer optical disk WORM, consisting in the fact that on the surface of the substrate to form a fluorescent layer in two stages, with or form the bottom polylog containing fluorescent dye, and then the top polylog containing afluorescent dye or first form the lower polylog containing afluorescent dye, and then the top polylog containing fluorescent dye, and afluorescent dye is chosen so that the absorption is essentially coincides with the spectral region of the absorption and/or fluorescence of the fluorescent dye.

19. The method of manufacturing according p, characterized in that the use of glass, polycarbonate or polymetylmetacrylate substrate.

20. The method of manufacturing according p, wherein the fluorescent dye is chosen from the group consisting of xanthene dyes groups eosin and rhodamine, acridine, oxazinone,azine stains, Pereladova, philantropic, cyanine, phtalocyanines, indigoid dyes and porphyrins.



 

Same patents:

FIELD: optical discs that can be manufactured with the use of one and the same process parameters.

SUBSTANCE: the optical disc for recording and/or reproduction has an area of an initial track, user's data area and an area of the final track. Each of the areas of the initial track, user's data and final track includes recording grooves and fields between the recording grooves produced in them. The recording grooves and the fields between the recording grooves include curves produced at least on one side of the recording grooves and fields between the recording grooves. The curves in the area of the initial track, in the area of the user's data and in the area of the final track are modulated by means of various methods of modulation.

EFFECT: enhanced reliability of signal recording and reproduction.

64 cl, 18 dwg

FIELD: optical data carriers.

SUBSTANCE: device has cation dye or mixture of cation dyes with optical characteristics, changed by means of recording beam, an at least one substance with functions of damper and phenol or substituted phenol with one hydroxide group or more, while it additionally contains phenol or substituted phenol in form of phenolate ion, forming a portion of anions for dye cations, as a stabilizer. Data carrier can contain anionic metal-organic thyolene complex as damper, which forms other portion of anions for dye cations.

EFFECT: higher stability, higher durability, lower costs.

5 cl, 1 tbl, 3 ex

FIELD: optical data carriers.

SUBSTANCE: optical data carrier has at least two layers, each of which is a substrate with recording film, on which optically discernible code relief is formed with information elements readable via laser radiation, which contain elements with optical limiting property. Method for manufacture of optical multilayer data carrier includes manufacture of at least two layers, each of which has optically discernible code relief with laser radiation readable information elements, which are formed of substance, having property of optical limiting. Method for multilayer optical recording of data, in which information is recorded by forming and moving pulses of laser radiation flow along surface of recording film in formed tracks, filled with substance, having optical limiting property, or components for synthesis of substance, having property of optical limiting. Method for reading from optical multilayer data carrier, including forming of laser radiation flow, its focusing at read layer with optically discernible code relief with information elements, containing substance, having property of optical limiting, modulation of light signal reflected from code relief by frequency and amplitude.

EFFECT: higher efficiency.

4 cl, 3 dwg

The invention relates to methods for producing information carriers such as CD-ROM

The invention relates to instrumentation, optical storage devices, and in particular to methods of manufacturing information carriers such as CD-ROM

The invention relates to the production of matrices for disk media
The invention relates to the making, in particular to optical storage devices, and can be used for the manufacture of transparent basics of optical disks with a constant signalosome, disposable and reversible recording

FIELD: optical discs that can be manufactured with the use of one and the same process parameters.

SUBSTANCE: the optical disc for recording and/or reproduction has an area of an initial track, user's data area and an area of the final track. Each of the areas of the initial track, user's data and final track includes recording grooves and fields between the recording grooves produced in them. The recording grooves and the fields between the recording grooves include curves produced at least on one side of the recording grooves and fields between the recording grooves. The curves in the area of the initial track, in the area of the user's data and in the area of the final track are modulated by means of various methods of modulation.

EFFECT: enhanced reliability of signal recording and reproduction.

64 cl, 18 dwg

FIELD: optical data carriers.

SUBSTANCE: device has tracks, each of which is comprises multiple recesses, formed on basis of first data, meant for recording, and areas between recesses. Multiple recesses are displaced from track center on basis of second data, at the same time recesses cross central position of track with given periodicity. First data may be recorded analogically to compact disk data. Second data may be separated from signal of track tracking error. Second data may be used for copy protection in relation to first data, while amount of first data, which can be recorded on carrier, does not decrease when recording second data, and as a result of recesses displacement range being set within limits of preset value in range, wherein no track tracking displacement occurs, first data can be played back by existing players to provide for compatibility of playback.

EFFECT: higher efficiency.

8 cl, 12 dwg

FIELD: optical data carriers.

SUBSTANCE: device has cation dye or mixture of cation dyes with optical characteristics, changed by means of recording beam, an at least one substance with functions of damper and phenol or substituted phenol with one hydroxide group or more, while it additionally contains phenol or substituted phenol in form of phenolate ion, forming a portion of anions for dye cations, as a stabilizer. Data carrier can contain anionic metal-organic thyolene complex as damper, which forms other portion of anions for dye cations.

EFFECT: higher stability, higher durability, lower costs.

5 cl, 1 tbl, 3 ex

FIELD: data carriers.

SUBSTANCE: in optical data carrier, including track, including multiple recesses, formed on basis of first data being subject to recording, and platforms, formed between adjacent recesses, these recesses are recorded with deformation on basis of second data. First and second data are synthesized and played for realization of sound playback with broad frequency range. Also, first data are recorded with possible playback by means of common disc player. Playback of first data is controlled by second data for protection of recorded data.

EFFECT: higher efficiency.

6 cl, 44 dwg

FIELD: optical data carriers.

SUBSTANCE: optical data carrier has at least two layers, each of which is a substrate with recording film, on which optically discernible code relief is formed with information elements readable via laser radiation, which contain elements with optical limiting property. Method for manufacture of optical multilayer data carrier includes manufacture of at least two layers, each of which has optically discernible code relief with laser radiation readable information elements, which are formed of substance, having property of optical limiting. Method for multilayer optical recording of data, in which information is recorded by forming and moving pulses of laser radiation flow along surface of recording film in formed tracks, filled with substance, having optical limiting property, or components for synthesis of substance, having property of optical limiting. Method for reading from optical multilayer data carrier, including forming of laser radiation flow, its focusing at read layer with optically discernible code relief with information elements, containing substance, having property of optical limiting, modulation of light signal reflected from code relief by frequency and amplitude.

EFFECT: higher efficiency.

4 cl, 3 dwg

The invention relates to a memory means containing at least one set of data in memory

The invention relates to the field of optical recording

The invention relates to the accumulation of information

The invention relates to the accumulation of information
The invention relates to devices used in electronic devices as storage devices

FIELD: optical data carriers.

SUBSTANCE: optical data carrier has at least two layers, each of which is a substrate with recording film, on which optically discernible code relief is formed with information elements readable via laser radiation, which contain elements with optical limiting property. Method for manufacture of optical multilayer data carrier includes manufacture of at least two layers, each of which has optically discernible code relief with laser radiation readable information elements, which are formed of substance, having property of optical limiting. Method for multilayer optical recording of data, in which information is recorded by forming and moving pulses of laser radiation flow along surface of recording film in formed tracks, filled with substance, having optical limiting property, or components for synthesis of substance, having property of optical limiting. Method for reading from optical multilayer data carrier, including forming of laser radiation flow, its focusing at read layer with optically discernible code relief with information elements, containing substance, having property of optical limiting, modulation of light signal reflected from code relief by frequency and amplitude.

EFFECT: higher efficiency.

4 cl, 3 dwg

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