Optical multilayer data carrier, method for manufacture thereof, method for multilayer data recording on said carrier and method for reading data from it

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 computing, and more specifically to techniques for recording and playback of informatsii optical radiation, and is intended for use in optical storage devices to a single account and multiple reading lasers.

Known multilayer optical information medium, based on property local changes of the refractive index of the optical medium. These changes cause birefringence and variations in the polarization of the readout beam (p. USA 5 278816, 5 586107 IPC G 11 7/24).

Known multilayer optical information medium, which used mechanical and photolithographic technology (p. USA 5559784 IPC G 11 7/00).

The disadvantage of these media is that these technologies it is possible to produce media with not more than two layers. This is a consequence of the fact that it is impossible to separate the useful signal from spurious reflections and stray light. As a result, the dependence of the signal-to-noise ratio varies as the n-3where n is the number of layers.

As a prototype we have chosen multilayer optical information medium and the manufacturing method, known from the description to the patent of Russian Federation №2 181509, IPC G 11 B 7/24, 1999, In accordance with this invention, the information carrier contains the spoon and information layers, having read by optical effects (in the form of holes or columns)that represent information, when this information layers contain placed against the input side of the standard layer having information effects with standard density information read by the optical beam generated by a light beam with the first wavelength, and a layer with a high density of information, which is essentially transparent to the optical beam with the first wavelength and at least partially reflective to light radiation with the second wavelength.

The method of manufacture of this media is to create at least two layers, each of which are in the form of a substrate with a recording film on which form optically distinguishable code relief with reading effects.

The media has a very high quality of the read signal, however, this principle cannot create media with three or more layers of high quality read signal.

There is also known a method of multi-layer optical information recording (p. the Russian Federation No. 2 017237, IPC G 01 7/00, 1994), selected as a prototype method of recording information on a multilayer optical media, which form the focus C is pisyayshie beams of optical radiation, coherent with each other, modulate them according to content, write by exposing the material of the information carrier, form a more focused beam of optical radiation, spatial combine it with the existing recording beams and write three beams, while the frequency of the radiation of the recording beam set to a transparency of the material of the storage medium, and the frequency is equal to the sum frequency radiation and additional recording beams, set in the region of the maximum of the absorption spectrum of the material carrier of information, which is used as a material with two-stage or two-photon absorption of optical radiation.

This method of a multilayer optical recording allows you to increase the recording density of information, however, the dispersion of the recording optical beam on the previous layers of information does not allow for the entry of a large number of information layers.

There is also known a method of reading from the optical multi-layered media (p. the Russian Federation No. 2 096836, IPC G 11 B 7/09, 1997), including the formation of the laser beam of the first wavelength, the focusing of the optical system on the surface of one of the read layer media on the Central line of the track, designed the La read the media of the first type, modulation of the reflected light signal in frequency and amplitude. In case of reading the second type of recording medium, the read spot focus on the edge of the track.

This method allows you to read from the media of two types and does not provide read from storage media containing more than two layers of information.

The task, which is aimed by the invention, is to increase the amount of records due to the creation of optical storage media that contains multiple layers, each of which is transparent (transmissive for the laser beam of small intensity (unfocused laser beam), and becomes readable opaque (absorbed) for a laser beam of high intensity focused laser beam), in which you can write and read information through multiple layers with small noise and errors, to realize the selective reading and writing of information.

The technical result achieved in the implementation of the claimed invention, is to increase the amount of recording information by creating multiple data layers in the same carrier, providing selective reading and writing of information, and improving the quality of the signal read and write information.

This technical the result is achieved by in multilayer optical data storage medium containing at least two layers, each of which represents a substrate with a recording film, which is formed of optically distinguishable code relief from being read by a laser of information elements, each information element contains a substance having an optical property restrictions, which provides a reflected reading of the focused laser beam, and the passage reads unfocused laser radiation, with each information element contains different depending on the recorded information, the quantity of substance having the property of optical limitations, and a recording film provided with a reflective coating on code relief.

According to the claimed invention, it is expedient to optical media contained multiple layers, each of which represents a substrate with a recording film, which is formed of optically distinguishable code relief with read information elements containing the substance having an optical property restrictions, and the sensitivity of the matter, which is filled with information items of each subsequent layer, the more susceptible the spine of substances which filled the information items in each of the previous layer.

According to the claimed invention, it is preferable that the layers of the media were connected among themselves.

According to the claimed invention, it is desirable that the optical information medium layers were connected among themselves by means of the adhesive composition.

In accordance with the claimed invention, it is expedient to provide information element coded elevation of each layer of the optical storage medium as a substance with optical property restrictions contained at least one substance selected from the group including porphyrins, indanthrene and their derivatives, cluster compounds, fullerenes, cyanine, phthalocyanine and naphthalocyanine dyes heavy metals.

According to the claimed invention, it is preferable that the height information item code elevation of each layer of the optical storage medium ranged from 0.1 to 2.5 microns, and the width ranged from 0.01 to 3.0 microns.

In accordance with the claimed invention, it is desirable that as reflective coatings on code relief recording film medium contains at least one substance selected from the group comprising titanium dioxide, magnesium, gold, iron, chromium, manganese, silver, neither the fir, tin, bismuth, copper, zinc, cadmium, antimony.

According to the claimed invention, it is preferable that the substrate of each layer of the information carrier contains at least one substance selected from the group including polycarbonate, polyester, acrylic, monovalency aromatic polymer, the polymer sinigalia, polymer vinylidenechloride, Polyacetal, polyolefin, glass, ceramics, epoxy resin.

It is advisable that the substrate of each layer of the optical information medium was made in the form of a disk.

Preferably, the substrate of each layer of the optical information medium was made in the form of tape.

It is desirable that the substrate of each layer of the optical information medium was made in the form of a map.

According to the invention it is expedient to code the elevation of each layer media was formed on the surface of the recording film in the form of topographic maps.

According to the invention it is preferable that in the method of manufacturing a multilayer optical information medium, comprising forming at least two layers, each of which are in the form of a substrate with a recording film on which form optically distinguishable code relief from being read by a laser of information elements, each information is the first element formed from a substance, having the property of optical limitations, and then, on the thus formed is optically distinguishable code relief is applied reflective coating, while the quantity of substance having the property of optical limitations, which form each information item is selected depending on the recorded information.

According to the invention preferably, in the method of manufacturing the optical information medium, the formation of information elements from a substance with optical property restrictions, was performed using the matrix with the given code relief from being read by a laser of information elements, which is transferred onto the recording film, and fill in the information elements of the relief substance having an optical property restrictions.

According to the invention it is expedient that in the method of manufacturing the optical information medium, the formation of information elements from a substance with optical property restrictions, produced by building a recording film in-depth tracks, filling these tracks components for photosynthesis substance with optical property restrictions, and the subsequent impact on area tracks focused, modulated La is Arnim radiation capacity of over 10 mW/mm 2pulses, the duration of exposure of each of which is chosen from 200 NS to 1000 NS, photosynthesis substance with optical property restrictions in the areas affected by the laser pulses focused modulated radiation to education in these tracks optically distinguishable code relief is read by a laser information elements from a substance with optical property restrictions, and the amount of a substance that is synthesized in each information item selected in accordance with the recorded content and adjust the exposure duration of the pulse is focused modulated laser radiation.

According to the invention it is expedient that in the method of manufacturing the optical information medium, the formation of the read information elements from a substance having the property of optical constraint was implemented by creating in the recording film in-depth tracks, filling these tracks substance having an optical property restrictions, impact on area tracks focused modulated laser radiation capacity of over 10 mW/mm2pulses, the duration of exposure of each of which is chosen from 200 NS to 1000 NS, and the destruction of substances which, having the property of optical limitations, the number of substances that have the property to optical limitations in the areas of impact pulses focused modulated laser radiation to education in these tracks optically distinguishable code of relief from being read by a laser information elements from a substance with optical property restrictions, the number of substances that have the property to optical limitations, each information element is chosen in accordance with the recorded content and adjust the exposure duration of the pulse is focused modulated laser radiation.

According to the invention it is expedient that in the method of manufacturing optical recording media were formed by multiple layers of media, each of which are in the form of a substrate with a recording film on which form optically distinguishable code relief with read information elements, each of which is filled with a substance having an optical property restrictions, and the sensitivity of the matter, which fills in the information elements of each subsequent layer, the greater the sensitivity of the matter, which fills in the information e is the cops each of the previous layer.

According to the invention preferably, in the method of manufacturing the optical information medium layers of the optical recording media were bonded to each other.

According to the invention it is preferable that in the method of manufacturing the optical information medium layers of the optical recording media were bonded together with the adhesive composition.

It is advisable that in the method of manufacturing the optical information carrier as a substance with optical property restrictions, used at least one substance selected from the group including porphyrins, indanthrene and their derivatives, cluster compounds, fullerenes, cyanine, phthalocyanine and naphthalocyanine dyes heavy metals.

According to the invention it is expedient that in the method of manufacturing the optical media recording film was applied with a thickness of 0.2 μm to 10 μm.

According to the invention preferably, in the method of manufacturing the optical information medium height of each information item code relief was chosen in the range from 0.1 to 2.5 microns, and its width was chosen in the range from 0.01 to 3.0 microns.

Preferably, in the method of manufacturing the optical information carrier as reflective coatings used at least one substance selected the s group, including titanium dioxide, magnesium, gold, iron, chromium, manganese, silver, Nickel, tin, bismuth, copper, zinc, cadmium, antimony.

It is advisable that in the method of manufacturing the optical information medium substrate was performed in the form of a disk.

Preferably, in the method of manufacturing the optical information medium substrate was performed in the form of a tape.

Preferably, the method of manufacturing the optical information medium substrate was performed in the form of a map.

According to the invention it is expedient that in the method of manufacturing optical storage media substrate performed at least one substance selected from the group including polycarbonate, polyester, acrylic, monovalency aromatic polymer, the polymer sinigalia, polymer vinylidenechloride, Polyacetal, polyolefin, glass, ceramics, epoxy resin.

According to the invention it is expedient to provide in the way of a multilayer optical recording of information, which form the flow of laser radiation, modulate it according to content, focus it on a writable layer multilayer media, and then produce a recording information by forming and moving pulses of the stream of laser radiation on the surface of the recording film according to the information the m content, recording information produced in the pre-formed track recording film, which fill components for photosynthesis substance with optical property restrictions, under the influence of pulses of laser radiation stream, the density of each pulse of laser radiation stream is chosen in the range from 10 mW/μm to 100 mW/μm, and the length of each pulse of laser radiation stream is chosen in the range from 200 NS to 1000 NS, and synthesize in the specified paths in the areas affected by the pulses of laser radiation stream optically distinguishable code relief from being read by a laser information elements made from a substance with optical property restrictions.

According to the invention it is preferable that in the method of the multilayer optical recording of information, which form the optical beam, modulate it according to content, focus it to a recordable layer of the device information, and then produce a recording information by forming and moving pulses of the stream of laser radiation on the surface of the recording film in accordance with the specified content, the information recording made in the pre-formed track regestriruius the second film, that fill components for photosynthesis substance with optical property restrictions, the density of each pulse of laser radiation stream is chosen in the range from 10 mW/μm to 100 mW/μm, and the exposure duration of each pulse is chosen in the range from 200 NS to 1000 NS, and carry out the destruction of the substance having the property of optical limitations in the areas affected by the pulses of laser radiation stream with the formation of optically distinguishable code of relief from being read by a laser information elements made from a substance with optical property restrictions.

According to the invention it is expedient to provide in the way of reading the optical multilayer media, including the formation of a stream of laser radiation, its focus on the surface of one of the read layers of multilayer media with optically distinguishable code relief information elements, scanning optically distinguishable code relief focused stream of laser radiation, modulated reflected from the scanned code relief of a light signal in frequency and amplitude, wavelength scanning focused laser radiation stream was chosen in the range from 532 nm to 670 is m, scan each information item code relief was carried out in the range from 10 NS to 200 NS, and the density of scanning the focused laser beam was chosen in the range from 1 mW/mm2up to 10 mW/mm2depending on the substances contained in the information effects readable code relief, and having the property of optical limitations with this code relief with the information elements read the information layer on which focus the laser radiation stream, reflects this thread, and information layers that do not focus the laser radiation stream, skip this thread.

Proposed in the present invention performing optical multilayer media with information elements filled with a substance having an optical property restrictions, allows you to make layers of the information carrier is virtually transparent to the unfocused laser radiation, i.e. transmissive unfocused laser radiation of low intensity, and reading layer media to make transparent to the focused laser beam, that is, absorbing the focused laser radiation of high intensity. This property is offered multilayer optical carrier information is provided by filling the information elements, substances, having the property of optical constraint is nonlinear transmission of laser radiation of these substances, depending on the intensity of the laser radiation, that is, when focusing the laser radiation on the substance there is a significant reduction of its transmission, while the unfocused laser radiation, the substance is practically impermeable to laser radiation.

Thus, the use of substances that have the property to optical limitations, allows selective reading of the information layers of media with the possibility of separating the useful signal from spurious reflections and scattered light, with a steady signal-to-noise.

Further objectives and advantages of the invention will become apparent from the subsequent detailed description with reference to the accompanying drawings, in which:

figure 1 - cross section of a multilayer optical storage media;

figure 2 - cross section of one of the layers of the multilayer optical storage media;

figure 3 - cross section of three layers of a multilayer optical information medium.

Figure 1 shows a cross section of media with multiple layers 1, each of which contains optically distinguishable code relief 2 with the read stream is a laser radiation 3 information elements 4, which are filled with material having an optical property restrictions. While the media may have the form of a disk, tape or card.

Each layer of the storage medium 2 is made in the form of the substrate 5, with the recording film 6, on which is formed a non-linear intensity of the irradiating light is optically distinguishable code relief 2 with read information effects 4, which is filled with material having an optical property restrictions. When this information effects can be made in the form of pits (pit), bars, or spots, while code relief has a reflective coating 7.

Experimentally it was found that information effects should correspond to a determined ratio of their dimensions, that is, their height h must be in the range from 0.1 to 2.5 microns, and the width b should be from 0.01 to 3.0 microns.

According to the invention, it is preferable that as reflective coatings are optically distinguishable code elevation of each layer of the carrier used a thin layer of at least one substance having good reflecting laser light ability, for example titanium dioxide, magnesium, gold, iron, chromium, manganese, silver, Nickel, tin, bismuth, copper, zinc, cadmium, antimony, with the above list may not be the boundary of the named compounds and possibly the use of other known materials, with named parameters.

It is expedient according to the invention that the substrate of each layer of the information carrier was made of at least one substance selected from the group consisting of polycarbonate, polyester, acrylic, monovalency aromatic polymer, the polymer weligamage, Polyacetal, polyolefin, glass, ceramics, plastic, metal or any other transparent substance, a good transmission of the laser radiation.

Layers of the information carrier 1, figure 3, can be bonded using the adhesive composition 8, with each previous layer can serve as a substrate for each subsequent layer.

The information elements of each layer of the carrier may be filled as a single substance with optical property restrictions, and different substances, with pick up such substances have the property to optical limitations, the sensitivity for each subsequent layer will increase compared to the previous one.

In accordance with the invention as substances having the property of optical constraints can be used in a variety of materials, nonlinear intensity impinging laser radiation, such as porphyrins, indanthrene and their derivatives, cluster compounds, fullerenes, cyanine, phthalocyanine and NAF is alieninate dyes, heavy metals, while the above list may not be limited named compounds and possibly the use of other known materials having the above property.

The formation of optically distinguishable code relief can be done in different ways, the most common of which are printing method and method of recording information using a laser beam.

When forming the code of the relief method of printing take master-matrix with the already recorded information in the form of, for example, pits (information elements), and intervals between them, and press this matrix in the recording film, resulting in the film being recorded is displayed on the matrix code relief information elements, for example potami. Then, on this terrain put a layer of substance having the property of optical limitations, which penetrates into pita and fills them. This substance layer can be applied by centrifugalism at 2500 rpm

When forming the code of the relief method of recording information of the first formed in the recording film track with a cavity, then fill their components for photosynthesis substance with optical property restrictions, and then produce the irradiation zone tracks focused modulated laser radiation power is Yu more than 10 mW/mm 2pulses within 200 NS to 1000 NS to the formation of structure with regularly alternating information elements with a substance having an optical property restrictions, which is synthesized in the feedback pulses of laser radiation. However, the greater the interval of exposure, the greater is synthesized substances in the information element, and the intervals of exposure determined in accordance with the recorded information. If the tracks are filled with a substance having an optical property restrictions, when exposed to laser radiation can cause degradation (destruction) of a substance with optical property restrictions, and the result is a structure with regularly alternating information elements with a substance having an optical property restrictions.

After the formation of optically distinguishable code relief on it put reflective coating. This coating can be applied at the facility magnetron sputtering.

When recording information on a multi-media form the flow of laser radiation 3, modulate it according to the recorded content, then focus it to a recordable layer of the multilayer carrier 1, and move the flow of laser radiation on the surface of the recording film 6, in which the pre is sustained fashion to form paths, filled with a substance having an optical property restrictions, or components for the synthesis of compounds having the optical property restrictions. Resulting in the formation of information elements by laser radiation pulses during a period of 200 NS to 1000 NS, depending on the amount of a substance that has the property of optical constraints generated in the information element. The density of the laser radiation is chosen in the range from 10 mW/mm2up to 100 mW/ mm2depending on the substance with optical property limits used in this recordable layer. When moving stream of laser radiation and exposure to it in certain places within a certain period of time is either the synthesis or degradation of a substance with optical property restrictions, and the formation of a code of relief with the information elements containing the substance having an optical property restrictions in the amount defined by the recorded information.

When reading from the optical multilayer media produce generating laser radiation 3, its focus on the surface of one of the read layer 1 of the multilayer media, and then produce a scanning optical discernible what about the code of relief 2 information elements 4 laser radiation stream 3, then the processing is reflected from the scanned code relief of signal frequency and amplitude. The wavelength scanning of the focused laser radiation stream is chosen in the range from 532 nm to 670 nm, a duration of a scanning pulse is chosen in the range from 10 NS to 200 NS, and the density of scanning the focused laser radiation stream is chosen in the range from 1 mW/mm2up to 10 mW/mm2depending on the substances contained in the information elements read code relief and have the property to optical limitations. Only read layer reflected scanning laser radiation stream, and the remaining layers pass this flux, as in their information elements contains a substance having an optical property restrictions, which is transparent for the laser radiation stream with defined above specified parameters.

An example of performing optical multilayer media.

The substrate in the form of a disk made of polycarbonate covered with a recording film on which method of contact printing using the reference matrix with the given code relief form code relief with the information elements of one of the layers of multilayer media information the AI. Then a layer of substance having the property of optical limitations, for example naphthalocyanine dye. Next is centrifugeuse when the rotation speed of 2500 rpm, resulting in naphthalocyanine dye penetrates into the information elements of the code of relief. The resulting coating is dried for 5 minutes at 70°C, after which the installation magnetron sputtering is applied reflective coating of titanium dioxide. Next, on the thus formed first layer of the information medium is covered with a layer of adhesive composition to which is applied a second layer of the multilayer information carrier, formed similarly to that of the first layer of the information medium. Thus form a multilayer medium with three or more information layers.

1. Optical multilayer information carrier containing at least two layers, each of which represents a substrate with a recording film, which is formed of optically distinguishable code relief from being read by a laser of information elements, wherein each of the information elements contains a substance having an optical property restrictions, which provides a reflection of the reader focused laser and the radiation, and passage reading unfocused laser radiation, with each information element contains different depending on the recorded information, the quantity of substance having the property of optical limitations, and a recording film provided with a reflective coating on code relief.

2. The information carrier according to claim 1, characterized in that it contains multiple layers, each of which represents a substrate with a recording film, which is formed of optically distinguishable code relief with read information elements containing the substance having an optical property restrictions, and the sensitivity of the matter, which is filled with information items of each subsequent layer, the greater the sensitivity of the matter, which is filled with information items of each of the previous layer.

3. The information carrier according to claim 1 or 2, characterized in that the layers of media are connected among themselves.

4. The information carrier according to claim 3, characterized in that the layers of media are connected among themselves by means of the adhesive composition.

5. The information carrier according to claim 1, characterized in that the substance having the property of optical limitations, it contains at least one substance selected from the group vkluchaya the porphyrins, indanthrene and their derivatives, cluster compounds, fullerenes, cyanine, phthalocyanine and naphthalocyanine dyes heavy metals.

6. The information carrier according to claim 1, characterized in that the height of each information item is from 0.1 to 2.5 μm, and its width ranges from 0.01 to 3.0 μm.

7. The information carrier according to claim 1, characterized in that the reflective coating of the recording film, it contains at least one substance selected from the group comprising titanium dioxide, magnesium, gold, iron, chromium, manganese, silver, Nickel, tin, bismuth, copper, zinc, cadmium, antimony.

8. The information carrier according to claim 1, characterized in that the substrate contains at least one transparent substance selected from the group including polycarbonate, polyester, acrylic, monovalency aromatic polymer, the polymer sinigalia, polymer vinylidenechloride, Polyacetal, polyolefin, glass, ceramics, epoxy resin.

9. The information carrier according to claim 1 or 8, characterized in that the substrate is in the form of a disk.

10. The information carrier according to claim 1 or 8, characterized in that the substrate is in the form of a tape.

11. The information carrier according to claim 1 or 8, characterized in that the substrate is in the form of a map.

12. The information carrier according to claim 1 or 2, characterized in that the code relief is formed on the surface of the reg is stereoma film in the form of topographic maps.

13. A method of manufacturing a multilayer optical information medium, comprising forming at least two layers, each of which are in the form of a substrate with a recording film on which form optically distinguishable code relief from being read by a laser of information elements, wherein each information item is formed from a substance having an optical property restrictions, and then code the relief applied reflective coating, while the quantity of substance having the property of optical limitations, which form each information item is selected depending on the recorded information.

14. A method of manufacturing a multilayer optical information medium according to item 13, wherein the formation of information elements from a substance with optical property restrictions, carried out using a matrix with the given code relief with optical read through the information elements, which is transferred onto the recording film, and informational elements of relief fill with a substance having an optical property restrictions.

15. A method of manufacturing a multilayer optical information medium according to item 13, wherein the forming information is ion of the elements of matter, having the property of optical limitations, produce by creating in the recording film in-depth tracks, filling these tracks components for photosynthesis substance with optical property restrictions, impact on area tracks focused modulated laser radiation capacity of over 10 mW/mm2pulses, the duration of exposure of each of which is chosen from 200 to 1000 NS, photosynthesis substance with optical property restrictions in the areas affected by the laser pulses focused modulated radiation to education in these tracks optically distinguishable code relief is read by a laser information elements from a substance with optical property restrictions, and the amount of a substance that is synthesized in each information item selected in accordance with the recorded content and adjust the exposure duration of the pulse is focused modulated laser radiation.

16. A method of manufacturing a multilayer optical information medium according to item 13, wherein the formation of information elements from a substance with optical property restrictions, carried out by creating in registrerade the film in-depth tracks, fill these tracks substance having an optical property restrictions, impact on area tracks focused modulated laser radiation capacity of over 10 mW/mm2pulses, the duration of exposure of each of which is chosen from 200 to 1000 NS, the destruction of the substance with optical property restrictions in areas of impact pulses focused modulated laser radiation to education in these tracks optically distinguishable code of relief from being read by a laser information elements from a substance with optical property restrictions, the number of substances that have the property to optical limitations, each information element is chosen in accordance with the recorded content and adjust the exposure duration of the pulse is focused modulated laser radiation.

17. A method of manufacturing a multilayer optical information medium according to item 13, wherein the carrier is formed from multiple layers, each of which are in the form of a substrate with a recording film on which form optically distinguishable code relief with read information elements, each of which is filled with a substance having a t the PTO optical limitations, thus the sensitivity of the matter, which fills in the information elements of each subsequent layer, the greater the sensitivity of the matter, which fills in the information elements of each of the previous layer.

18. A method of manufacturing a multilayer optical information medium according PP-17, characterized in that the layers of the optical information carrier fastened to each other.

19. A method of manufacturing a multilayer optical information medium according p, characterized in that the layers of the optical information carrier fastened to each other with an adhesive composition.

20. A method of manufacturing a multilayer optical information medium according PP, 14 and 16, characterized in that the substance having the property of optical limitations, use at least one substance selected from the group including porphyrins, indanthrene and their derivatives, cluster compounds, fullerenes, cyanine, phthalocyanine and naphthalocyanine dyes heavy metals.

21. A method of manufacturing a multilayer optical information medium according PP and 16, characterized in that the recording film is applied with a thickness of 0.2 to 10 microns.

22. A method of manufacturing a multilayer optical information medium according to item 13, wherein the height of each information item code relief you who eraut in the range from 0.1 to 2.5 μm, and its width is chosen in the range from 0.01 to 3.0 μm.

23. A method of manufacturing a multilayer optical information medium according to item 13, characterized in that the reflective coating is used at least one substance selected from the group comprising titanium dioxide, magnesium, gold, iron, chromium, manganese, silver, Nickel, tin, bismuth, copper, zinc, cadmium, antimony.

24. A method of manufacturing a multilayer optical information medium according to item 13, wherein the substrate is performed in the form of a disk.

25. A method of manufacturing a multilayer optical information medium according to item 13, wherein the substrate is performed in a tape form.

26. A method of manufacturing a multilayer optical information medium according to item 13, wherein the substrate is performed in the form of a map.

27. A method of manufacturing a multilayer optical information medium according to item 13, wherein the substrate is performed at least one substance selected from the group including polycarbonate, polyester, acrylic, monovalency aromatic polymer, the polymer sinigalia, polymer vinylidenechloride, Polyacetal, polyolefin, glass, ceramics, epoxy resin.

28. The method of the multilayer optical recording of information, which form the flow of laser radiation, modulate it according to the information of the sod is a neigh, focus it to a recordable layer multilayer media, and then produce a recording information by forming and moving pulses of the stream of laser radiation on the surface of the recording film in accordance with the specified content, wherein the information recording produced in the pre-formed track recording film, which fill components for photosynthesis substance with optical property restrictions, under the influence of pulses of laser radiation stream, the density of each pulse of laser radiation stream is chosen in the range from 10 to 100 mW/mm2and the duration of each pulse of laser radiation stream is chosen in the range from 200 to 1000 NS, and synthesize in the specified paths in the areas affected by the pulses of laser radiation stream optically distinguishable code relief from being read by a laser information elements made from a substance with optical property restrictions.

29. The method of the multilayer optical recording of information on p, characterized in that the information recording produced in the pre-formed track recording film, which is filled with material having an optical property restrictions, while p is otnesti each pulse of laser radiation stream is chosen in the range from 10 to 100 mW/mm 2and the exposure duration of each pulse is chosen in the range from 200 to 1000 NS, and carry out the destruction of the substance having the property of optical limitations in the areas affected by the pulses of laser radiation stream with the formation of optically distinguishable code of relief from being read by a laser information elements made from a substance with optical property restrictions.

30. The method of reading optical multilayer media, including the formation of a stream of laser radiation, its focus on the surface of one of the read layers of multilayer media with optically distinguishable code relief information elements, scanning optically distinguishable code relief focused stream of laser radiation, modulated reflected from the scanned code relief of a light signal in frequency and amplitude, characterized in that the wavelength scanning of the focused laser radiation stream is chosen in the range from 532 to 670 nm, scanning each information item code relief is carried out in the range from 10 to 200 NS, and the density of scanning the focused laser radiation stream select in the range from 1 to 10 mW/mm2depending on in the society, contained in the information elements read code relief and having the property of optical limitations with this code relief with the information elements read the information layer on which focus the laser radiation stream, reflects this thread, and information layers that do not focus the laser radiation stream, skip this thread.



 

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The invention relates to a method of producing perspire formula H(CFR1CF2)nCH2OH (I) wherein R1is F or CF3when n=1, and R1is F, when n=2, including the interaction of methanol with tetrafluoroethylene or HEXAFLUOROPROPYLENE in the presence of a source of free radicals

The invention relates to optical storage media with high recording density information

The invention relates to optical disks, which have multiple information layers

The invention relates to optical storage media

FIELD: optical record/play devices.

SUBSTANCE: data area on disc is divided into sectors. Each sector header has first header and second header, recorded in a way to deflect from track middle in opposite directions. Said first and second headers have address areas, wherein sectors address signals and synchronous signals areas are recorded, wherein synchronous signals for detecting address signals are recorded. First value of synchronous clock signal is detected from first header and is a Lvfo1. second value of synchronous clock signal is detected from second header and is a Lvfo3. relation of first value Lvfo1 to second value Lvfo3 is a previously set limited value.

EFFECT: higher precision of error detection.

7 cl, 15 dwg

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