Media optical storage device
(57) Abstract:The storage medium consists of a substrate and a recording environment. The substrate is made of a transparent material. It consistently applied reflective and protective layers. The reflective layer is made of aluminum. The recording medium is made of an alloy of tellurium, arsenic, and selenium. The composition of the alloy components is the following: tellurium-10-35 at. %, arsenic - 2-at. %, selenium-50-88 at. %. The technical result is an increase in the reliability of information storage and contrast her account. 2 Il. The present invention relates to techniques for recording and reproducing information of the optical radiation and is intended for use in optical storage devices to a single account and multiple reading lasers infrared range.Known storage media for optical recording, consisting of a substrate and a recording medium are made of an alloy of tellurium, arsenic, germanium and selenium, with the following ratio of components, at.%: Te 50-88, As 10-25, Ge 0-10, Se 0-40 (1). The recording of information is local destruction of the material of the recording medium by laser radiation from the side of the recording layer. The device has stereoscape layer and the optics of the laser.The prototype of the present invention is a medium for optical recording laser infrared range, consisting of a substrate made of a transparent material, and the recording medium, successively deposited reflective and protective layer (2). As the material of the recording medium selected Sb2Se3the reflective layer - Bi2Te3. When recording information in the device prototype is the transition of a material of the recording medium from the amorphous state to the crystal, which leads to an increase of the reflection coefficient from 10 to 40%. To ensure reliable operation of the tracking laser beam for marking in the transparent substrate of the disk and high contrast records required more high reflectivity (>60%), and the device is in the prototype provides the reflectance of the information carrier is not more than 40%. Relatively high temperature phase transition of the recording medium 160oC requires an increase in the laser power during recording of information.Thus, the main drawback of the prototype is relatively small reflectance.Another disadvantage of the mouth which then requires higher laser power during the recording.In connection with these technical and technological results of the use of the device on the prototype there is a problem of creation of the media, optical storage device, intended for use in the storage of information with a single entry and multiple disabilities, in particular in the household, and having a high reflection coefficient, the lower the softening temperature of the recording environment and increased reliability of information storage.The problem is solved by the author in the following way. In known storage media, optical storage device, consisting of a substrate made of a transparent material, and the recording medium, successively deposited reflective layer and a protective layer, reflective layer is made of aluminum, and the recording medium from an alloy of tellurium, arsenic, and selenium with the following components: tellurium 10-35 at. % arsenic 2 to 15 at.%, selenium 50-88 at.%.The technical result from the use of the proposed device is to increase the reliability of data storage while maintaining its sensitivity.The main technical advantage of this is telego layer with high reflectance. This increases the contrast of recording information.The invention is explained drawings Fig. 1 and Fig. 2, on which is shown: Fig. 1 - table of compositions of the recording medium on the basis of which can be prepared media for recording lasers infrared range, Fig. 2 - media optical storage device.In Fig. 1 shows the compositions of the recording medium with a low glass transition temperature, which can be prepared media for recording lasers infrared range. The recording medium should have a relatively small absorption coefficient for increasing the reflectivity of the media. To maintain the sensitivity of the information carrier softening temperature of the recording medium should be relatively small. The recording of information is carried out by local photothermal destruction of the recording medium. The combination of small absorption and a low softening temperature allows you to provide account information on the proposed media. The increase in the content of tellurium in excess of the specified range leads to higher crystallization with whom their months. The reduction in the content of tellurium reduces the absorption rate environment and makes it slightly sensitive to radiation of a semiconductor laser. The increase in the concentration of arsenic increases the glass transition temperature of the recording medium, which complicates the process of education unit of information. The recording of information is carried out by local photothermal destruction of the recording medium. Reduction of arsenic leads to higher crystallization ability of the recording medium. The content of arsenic and tellurium is optimal and provides high stability of the environment to aging and degradation, on the one hand, and the possibility of recording information by semiconductor lasers, near-infrared, on the other.In Fig. 2 shows the layer structure of the recording media. The storage medium consists of a substrate (1) made of transparent material, the recording medium (2), a reflective layer of aluminium (3) and protective layer (4). The laser beam (5) passes through a separating prism (6), a transparent substrate (1), the recording medium (2), is reflected from the reflective layer (3), passes in the opposite direction and enters the device registration radiation (7). When record is termicheskogo destruction of the recording medium. The laser power reading is not sufficient to change the optical density of the recording layer. Due to the difference of the magnitude of the reflected signal on the recorded and unrecorded areas is provided the information recording offer media. The application of the reflective layer can improve the reflectivity of the media. In addition, isolation of the recording medium between the substrate and the reflective layer significantly reduces the crystallization ability of the recording medium than increases the reliability of data storage. The material of the reflective layer should have high reflectivity and to be inert in relation to the recording medium. Aluminum fully meet these requirements. The protective layer protects the media from external influences. It is preferable for the protective layer of the curable by ultraviolet radiation polymer.Example. Media optical storage device is manufactured as follows. For the synthesis of alloy recording medium take 3,39 g of tellurium, 0.50 g of arsenic and 6.11 g of selenium. The sample is placed in a vial made of quartz glass, vacuum ampoule and Treplev produce on the air. The alloy composition of the Te24Se70As6put on a polycarbonate substrate with a thickness of 1.2 mm, diameter 120 mm method thermionic sputtering to a thickness of 120 nm. The reflective layer of aluminium of a thickness of 60 nm is applied from the recording medium by the method of cathode sputtering. A protective layer with a thickness of 10-20 μm from vodootvedenija polymer to aluminum by centrifuging on the air, followed by hardening under the action of ultraviolet radiation.The reflection coefficient of the media is 71%, the absorption coefficient of the recording medium to 19% at a wavelength of 790 nm. Media working temperature from -20 to 40oC; can withstand temperatures 50oC for a long time (10 - 20 days) without derating, temperature 30oC at a relative humidity of 95% within 10 days.The recording layer has a thickness of 50-300 nm. When the thickness that is less than 50 nm, reduced energy sensitivity due to the small absorption of optical radiation in the recording layer. When the thickness is, for the most 300 nm, decreases resolution. As the material of the carrier substrate information can be used glass, polycarbona the proposed high-frequency magnetron and thermionic deposition using evaporation of a special form. The deposition rate of 0.5-5 nm/sec, the pressure of residual gases in the chamber 10-5mm RT.article.Aluminum is applied by cathodic sputtering in a vacuum thickness of 40-80 nm. As a material of the protective layer used fototerapia polymers based epoxyacrylate. A protective layer is applied by centrifuging in the air with a thickness of 10-20 μm, followed by curing under the action of ultraviolet radiation.Sources of information;
1. French patent N 2363857, CL G 11 B 7/00, 1978.2. French patent N 2536197 A class. G 11 B 7/24, 18.05.84. Media optical storage device consisting of a substrate made of a transparent material, and recording medium with sequentially deposited reflective and protective layers, wherein the reflective layer is made of aluminum, and the recording medium is made of an alloy of tellurium, arsenic, and selenium with the following components, AB.%:
Tellurium - 10 - 35
Arsenic - 2 - 15
Selenium - 50 - 88
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
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: 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: 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 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: 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
FIELD: engineering of information carriers and appropriate reading and recording devices.
SUBSTANCE: variants of information carrier contains information about its configuration recorded thereon as well as information about inertia moment of current information carrier. Recording device contains means for determining physical characteristics of utilized information carrier by reading information about configuration and information about inertia moment from wobbulated groove of information carrier, and recording control means, applying corrections for performing recording process in accordance to physical characteristics of information carrier. Reading device contains means for determining physical characteristics of information carrier by reading information about configuration and information about inertia moment, and recording control means, applying corrections for performing reading operation in accordance to physical characteristics of information carrier.
EFFECT: simple and precise process of determining physical characteristics of information carrier, possible adjustment of reading and recording operations.
4 cl, 93 dwg
FIELD: engineering of devices for information storage.
SUBSTANCE: device for information storage contains disks with information carrying layer mounted with possible rotation relatively to common axis, disks rotation drive, reading and/or recording head, positioned on the side of end of one of edge disks and directed towards the latter by its active zone, and also drive for moving aforementioned head in plane, parallel to rotation plane of disks. Information carrying layer at least on one disk, positioned on the side of head, is made with forming of window, transparent for signal, emitted and/or read by head and having shape matching movement trajectory of head, and disks rotation drive is made with possible independent rotation of disks and holding in position, providing for positioning of window in front of active zone of head.
EFFECT: increased efficiency.
8 cl, 4 dwg
FIELD: engineering of data carrier, and of recording and reading devices, compatible with such a data carrier.
SUBSTANCE: each variant of aforementioned data carrier contains recording track, formed by a stream of recesses on the surface of carrier, data of recess represent information recorded on it, which contains main data and sub-code. In accordance to one of variants, information about physical characteristics of current data carrier is recorded in sub-code. In accordance to other variant, data carrier contains multiple individual reading/recording zones, physical characteristics of which are different, and each one of aforementioned zones contains zones for input, zones for program and ones for output, while in sub-code of input zone of each one of aforementioned zones, information about physical characteristics of appropriate individual reading/recording is recorded as well as information about starting position of input zone of next individual reading/recording zone. Each one of variants of recording device contains a certain device for determining physical characteristics of aforementioned data carrier by reading information about these from sub-code, and each variant of reading device contains aforementioned determining device and device for controlling reading.
EFFECT: increased quality of reading and writing of information.
6 cl, 94 dwg
FIELD: optical recording technologies, namely, engineering of two-layered optical disks with high recording density, and of devices for recording/reproducing from them.
SUBSTANCE: two-layered optical disk with high recording density contains first recording layer and second recording layer, positioned on one side of central plane, dividing the disk in half along thickness, close to surface, onto which light falls. First thickness of substrate from surface, onto which light falls, to first recording layer has minimal value over 68,5 micrometers, second thickness of substrate from surface, onto which light falls, to second recording layer has maximal value less than 110,5 micrometers, while refraction coefficient is within range 1,45-1,70.
EFFECT: minimization of distortion of wave front, provision of possibility of more precise recording of signals onto optical disk or reproduction of signals from optical disk.
8 cl, 10 dwg