Disc-shaped optical disk and method of manufacturing
(57) Abstract:The invention relates to techniques for gathering information. Disc-shaped optical storage of binary information, characterized by the fact that the number of landow performed in the optical reference surface in the form of recesses, the depth of which is less than 30% of the depth of the pit. Following each other in the direction of the track and/or adjacent in the radial direction, in the form of the recesses Landy form a macroscopic pattern. Made in the form of the recesses Landy may have a U-shaped cross section and a width approximately corresponding to the width of the pit. Landy may have V-shaped cross-section and smaller than pittas width. A method of manufacturing a glass master disc-shaped optical drive provides Podarochnoe exposure votyakova glass layer of the original laser beam in the zone formed by the pits and the subsequent manifestation of the glass of the original. The intensity of the laser beam in the area of landow that must be made in the form of recesses in the optical reference surface, is reduced to a value that is a maximum of 50% forming a pita intensity values. Thus, the invention, the optical means, it allows us to solve the problem of pirated copies faced by the manufacturers of the CD. 2 S. and 3 C.p. f-crystals, 2 Il. The invention relates to a disc-shaped optical storage for binary information that is sequentially accumulated in the form of a sequence of pits and landow along the spiral track, made in smooth optical reference surface, and independent from each other the length of the pits and landow represent the accumulated binary values read through focused, driven along the track of the laser beam in the interference principle.In addition, the invention relates to a method of manufacturing a so-called glass original, which can be made of the matrix, clerks, in turn, for mass production of such a disc-shaped drive.One of the most famous optical media these kinds is the CD-ROM, basic properties which are set by the IEC 908 and specification "Compact Disc Digital Audio System Description", June 1989, publishers Sony and Philips. The CD has among others the following characteristics; information recorded sequentially in the form of a spiral Dor the Oh of the surface diameter of focus equal to the width of the track about 1 μm. Within the tracks one after another followed by lucabrasi cavities, so-called pita, separated from each other in the track direction and in the radial direction of the smooth areas of the surface.These sites lying in the direction of the track between adjacent patami called Lindy. The width of the pits is less than half the width of the track. The length of the pits and landow represent the accumulated binary values, namely in such a way that each transition between Pete and the land or between land and Pete, if you look in the direction of the track to be detected as a logical unit, and other areas as pits and landow, however, as logical zeros.For detection of the transitions used are known from the patent Germany N 2208379 the principle of destructive interference. She has a uniformly reflective surface of the disk its optimum if, on the one hand, the depth of the pit is exactly the same quarter of the wavelength of the laser beam, and, on the other hand, one half of the incident light is reflected from surrounding this pit areas smooth base surface (including Landy), and the other half from the bottom of the pit.The sequence of pits and landow formed would then Maxim is pricheskoj medium is however, receiving a subsequent signal paths of the reflected part of the laser beam.Subsequent signal paths, however, when the depth of the pit /4 is equal to zero, and when the depth of the pit /8 passes through a maximum.Neither the CD nor any other working on the same principle of reading the storage medium cannot therefore be used for optimal recovery of the information signal the depth of the pit /4.
On the contrary, the depth of the pit is about 0,225 . The CD of transparent polycarbonate with refractive index n = 1,46 read, as it is known, through the transparent polycarbonate, as well as with the conventional wavelength of the laser beam of 780 nm, i.e. the wavelength of 534 nm polycarbonate, the depth of the pit is therefore 120 nm.From calculations of Germany N 4121505 known improvement of the optical storage medium of the above kind, aimed at simplifying the method of manufacturing due to the large tolerances of the depth of the pit and, in particular, the reduction of the cycle time used for matriciana injection molding machines, without compromising this compatibility storage environment the storage environment of the aforementioned kind.To do this, improved storage credimama first sections of greater depth, appropriate peetam and second areas of lesser depth corresponding to landam, with an intermediate step transitions.While the depth of the first sections is exactly equal to the above-mentioned optimum in a quarter of the wavelength of the laser beam, whereas the depth of the second parcel is approximately one sixteenth of this wavelength.From media these kind of CD has become very widespread and therefore of great economic importance.The manufacturers of the CD are increasingly faced with the problem of pirated copies.Since the method of manufacturing such optical storage media has become a common level of technology and well developed, neither the trade nor the consumer cannot distinguish pirate product from the original.The basis of the invention is therefore the task to provide a disk drive of the generic type are extremely difficult faked resistant marking (in principle, any shape and size) are clearly detectable by optical means.This problem is solved according to the invention by the fact that in the optical reference surface is made of a selected number of landow in the form of grooves, flat with is the R from the optical reference surface, compatibility this medium does not deteriorate even when the depth of the pit is not equal to 0.25 in accordance with the layout of Germany N 4121505 and equal, as in conventional prior art, 0,225 .
The proposal according to the invention therefore allows the manufacturer to provide each individual storage environment without any additional cost during the manufacturing process in one or more specified places marked in the form of a number of landow made as a flat recess.This marking may be in extreme cases is so small, i.e., to cover so little landov that it can only be detected by an electronic microscope, and even that with a reasonable investment of time only when you know the place where this marking.Needless to say, deep in the optical reference surface used for marking the drive Landy should not follow each other in the direction of the track, i.e. can also be separated by more than one Pete and lying between potami "normal" lendme.In addition, in-depth Landi not necessarily have to have all the same depth. Within a given depth area depth landit is what made according to the invention Landy, although they are absorbed only by a fraction of the wavelength of the laser beam in the optical reference surface, cause the effects visually perceived even when the lighting diffused white light (e.g. fluorescent), namely the naked eye in a sufficiently large number performed similarly landow.Preferred is therefore a form of execution, which follow one another in the direction of the track and/or adjacent in the radial direction, in the form of the recesses Landy form a macroscopic pattern.This pattern stands out from the rest of the surface of the drive depending on the angle of incidence and angle of the consideration of different gradation of gray, like the so-called water mark.What made thus, the visual pattern can be, in principle, any type, i.e., to carry, for example, the name or trademark of the manufacturer, the name of the accumulated program material and so on, obviously.Preferred features geometric shapes in the form of recesses of landow given in PP 3-5 formulas.Because p. 1 used for marking Landy designated as the conditions apply to the occasion, when made thus marking is in the range needed to read the drive surface.This surface covers, for example, a CD-ROM in addition to the so-called software section of the inlet and outlet sections.Outside these areas the surface of the medium is irrelevant to the reading process, and thus for the proper functioning of the playback device.There fall away so the above limitations depth special used for labeling the drive, i.e., the depth in the optical reference surface landow.This means that the pits and landow outside needed to read the drive surface depth depth to read the drive surface, the depth in-depth in the optical reference surface landow any and therefore can be optimized so that the resulting marking had a particularly strong contrast with the rest of the drive's surface and therefore especially could easily be perceived by the naked eye.Another object of the invention is to develop a method of manufacturing steklyannov opital with the proposed labeling.This problem is solved by the fact that the intensity of the laser beam in the area of landow that must be made in the form of recesses in the optical reference surface, is reduced to a value in the range needed to read the drive surface is a maximum of 50% forming a pita intensity values outside this surface lies between the technically feasible minimum value and 100% forming pita intensity values.In other words, in the zone of normal landow laser beam is manipulated as before, but in the area of landow made in the form of recesses in the optical reference surface, switch on the intensity value that is less used for the formation of the pit.Because the depth of landow made in the form of recesses in the optical reference surface, it is necessary to vary, we work with a number of different intensity values corresponding to the number of different depths.The invention is illustrated below with the help of drawings, on which: Fig. 1: a top view of a CD, label the CD according to the present invention; Fig. 2: surface topography, for example, place "X" in Fig. 1 precipicely above-mentioned kind, has three locations marked "CD" like a watermark, which also should be understood only as an example and which is depicted on the mirror on the whole surface as amended (darker) gray tone. Depending on the angle of vision, you will see all three labeling and, if necessary, only one or two.In Fig.2 depicts the topography of the surface at an oblique form, when viewed from the side of the stamping. The track on the left edge are numbered arbitrarily. The cut tracks 1 - 6, which because of the strong increase seem to be linear, but macroscopically follow each other in a spiral, are a series along the length of the pits 21 and landow 22 in accordance with the accumulated depicted on the site of the binary information. Landow 22 it is, in other words, is related to the track of the optical sections of the surface.On tracks 7 - 10, in contrast, pictured here in the neckline Landy made in the form of recesses 23 in the optical reference surface, flat compared with the depth of remaining unchanged pits 21.It is seen that done so Landy have U-shaped cross-section and only slightly narrower than the pit 21. If Pitta 21 and Landy 22 or 23 do not is called the original, the Pitta 21 and Landy 23 is formed in the cross-section of the negative form of the recording of the cutter, i.e., have a correspondingly V-shaped cross-section.Because of its small depth, component, and preferably less than 20% of the depth of the pit, Landy then have a much smaller width than that of Pitta (not shown).In this example, the performance on the CD-ROM Fig. 1 on the surface, like where the watermark is marked "CD" in the form of flat recesses Landy 23 record, whereas in other parts of the surface remain normal Landy 23.If instead you select here macroscopic marking "CD" disc-shaped optical drive, you must append "hidden" marking, which is impossible to detect with the naked eye and even a light microscope, it is necessary only accordingly to reduce the number of implemented according to the invention of landow 23 and run them in a place known only to the manufacturer of the drive.In addition, the usual Landy 22 and is made according to the invention Landy 23 can follow each other within the same track, and the sequence can, in turn, to represent binary information.Ofpregnancy original, which cover votyakova layer and exhibit tracks the laser beam.Where totalcopy layer exposed, occur after the manifestations of the glass original label patami deepening.If you want to record Landy 23 proposed species, the relevant parts of the exposure intensity of the laser beam not reduce to zero, and the average of several tens of percent of forming a pita intensity values. 1. Disc-shaped optical drive binary information that is sequentially accumulated in the form of a sequence of pits and landow along the spiral track, made in smooth optical reference surface, and independent from each other the length of the pits and landow represent the accumulated binary values read through focused, driven along the track of the laser beam in the interference principle, wherein the selected number of landow performed in the optical reference surface in the form of recesses (23), the depth of which is less than 30% of the depth of the pit (21).2. The drive p. 1, characterized in that following each other in the direction of the track and the3. Drive under item 1 or 2, characterized in that it is made in the form of the recesses Landy (23) have a U-shaped cross section and a width corresponding to the width of the pits (21).4. Drive under item 1 or 2, characterized in that it is made in the form of the recesses Landy (23) have V-shaped cross-section and smaller than pittas width.5. The method according to PP.1 to 4, providing Podarochnoe exposure votyakova glass layer of the original laser beam in the zone formed by the pits and the subsequent manifestation of the glass of the original, while totalcopy layer will not have recesses in the exposed areas, wherein the intensity of the laser beam in the area of landow that must be made in the form of recesses in the optical reference surface, is reduced to a value that is a maximum of 50% forming a pita intensity values, and the outside needed to read the drive's surface the intensity of the laser beam lies between the technically acceptable minimum value and 100% forming pita intensity values.
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
FIELD: data carriers.
SUBSTANCE: method includes forming a mark and space with use of signal, containing record template, erasing template, having multiple pulses, and cooling pulse, connecting templates of recording and erasing.
EFFECT: higher efficiency.
3 cl, 21 dwg