CN114627900A - Method for positioning transparent and uniform storage medium - Google Patents
Method for positioning transparent and uniform storage medium Download PDFInfo
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- CN114627900A CN114627900A CN202210289619.3A CN202210289619A CN114627900A CN 114627900 A CN114627900 A CN 114627900A CN 202210289619 A CN202210289619 A CN 202210289619A CN 114627900 A CN114627900 A CN 114627900A
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/002—Recording, reproducing or erasing systems characterised by the shape or form of the carrier
- G11B7/0037—Recording, reproducing or erasing systems characterised by the shape or form of the carrier with discs
- G11B7/00375—Recording, reproducing or erasing systems characterised by the shape or form of the carrier with discs arrangements for detection of physical defects, e.g. of recording layer
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
- G11B7/0045—Recording
- G11B7/00451—Recording involving ablation of the recording layer
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
- G11B7/0045—Recording
- G11B7/00455—Recording involving reflectivity, absorption or colour changes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
Abstract
The invention belongs to the technical field of storage medium positioning, and discloses a method, a system and application capable of positioning in a single storage medium, wherein an optical head adopts a double-objective lens or double-light-spot scheme; writing an address with layer information into a spiral line with a certain width by a spiral line of a prefabricated three-dimensional material in an open-loop writing mode; the address information is marked at specific positions of the spiral at the time of pre-preparation of the inscription. The scheme of the invention which can position in a single storage medium can ensure that different logic layers can be found in a single storage material, thereby realizing the reading and writing operation of information data. By the format and the layer jump scheme based on the format, accurate layer jump operation can be realized, and the method has important significance for subsequently realizing multi-layer data reading and writing; the spiral line with a certain width adopting the layer jump scheme only occupies less storage space for identifying the layer number, does not occupy too much storage space of a user, and improves the storage capacity of three-dimensional storage.
Description
Technical Field
The invention belongs to the technical field of storage medium positioning, and particularly relates to a method, a system and application capable of positioning on a single storage medium.
Background
At present, after commercialization of the blue-ray technology, researchers have conducted comprehensive research on optical discs and storage devices thereof, and the main purpose of research is to improve the lightThe storage capacity of the disk is required to meet the data storage requirement of the big data era and the advantages of a large-capacity storage device such as a hard disk are obtained. In the conventional optical disc such as CD, DVD, blu-ray BD, the storage density is improved by reducing the wavelength of incident light, increasing the numerical aperture of the objective lens, and so on to improve the writing density or reading resolution, and if the light with the wavelength λ is used as the incident light source and the numerical aperture of the objective lens is λ, the theoretical storage surface density and the numerical aperture of the objective lens are the same
Is in direct proportion. The storage density of the current optical disc is limited by the size of the recording spot, and the recording density and the storage capacity are increased by increasing the numerical aperture NA of the objective lens and adopting a light source with a shorter wavelength as much as possible, the NA of the blu-ray disc and even the latest commercial product-the archival disc is 0.85, the wavelength is 405nm, and the cost and the manufacturing difficulty have reached the limit of being able to be improved, therefore, in order to further improve the storage density, researchers consider fully utilizing the dimension (depth direction) perpendicular to the disc, and develop from discrete and limited polyhedral storage (currently, the industry achieves a single-sided 3-layer maximum) to three-dimensional continuum storage, and the theoretical storage density can reach the theoretical storage density
The storage density is increased by one order of magnitude, and the corresponding storage capacity can also be increased by several orders of magnitude.
Three-dimensional recording in a single (homogeneous) storage medium, typically comprising a thick recording layer and a reference layer, the reference layer serving as a servo to provide spatial and temporal reference information; the recording layer is used to record data. Compared to existing multi-recording layers, the volume storage gives a compromise between lower cost and higher theoretical storage capacity. The adoption of a single storage medium inherently greatly improves the optical transmittance and reduces the loss of incident light in the medium, but cannot provide spatial information in the direction perpendicular to the disk, and thus cannot complete the addressing operation. If this problem cannot be solved, the single-medium-body storage device cannot be commercialized.
The present invention is directed to a method for providing uniform material to provide addressing information in a depth direction, thereby completing a layer jump operation of a memory device using transparent uniform material.
For layer jump operation (movement of the focusing position of a laser spot between different recording layers) of an optical disc having a plurality of recording layers, the conventional optical disc apparatus generally closes a focusing servo subsystem and a tracking servo subsystem to open loop, and then drives an objective lens to move along an interlayer direction, i.e., an axial focusing direction, so as to move a focus to a range including a target recording layer; the focus servo is then turned on to enter a closed loop state to complete focusing (to focus the laser spot on the target information layer), while the tracking servo is enabled to complete tracking. Thereby, the layer jump operation is completed. However, in many known technical solutions, the layer jump is performed to the vicinity of the focus position of the target recording layer in an open-loop manner, which is equivalent to a blind jump, and then a search is performed within a range to complete the layer jump operation; the implementation of this depends on the accuracy of the actuator and the quality of the disc manufacture. The layer jump scheme of the invention is always in a closed loop state, follows up from a known servo surface and is always in a closed loop mode (see figure 7), thereby greatly reducing the requirements on the open loop precision of an actuating mechanism and the quality of discs manufactured in large scale. The servo surface may be on the surface (with respect to the entrance surface) or the bottom surface of the transparent uniform storage medium.
Through the above analysis, the problems and defects of the prior art are as follows: the existing single storage medium can not provide space information in the direction vertical to the disc, and the single medium body storage can not be realized; the requirement on the precision of an equipment executing mechanism is high, and the requirement on the quality of the disk is high.
At present, the storage media with a plurality of recording layers all adopt an open-loop layer-jumping scheme, the layer-jumping operation may have the problem that a required layer cannot be accurately found once, and the high requirement on the quality of a disk is required, the high requirement on the precision of a layer-jumping actuator is required, and a certain requirement on axial or radial deflection in the rotation process of the disk (namely, the high requirement on the quality of the disk) is required. The scheme of the invention is that the spiral line with certain width and format, which starts from the servo surface and ends at each data layer data track in the pre-writing way, reaches the target layer and directly enters the data track, thus saving the process of switching from the open-loop state to the closed-loop state. In comparison, the present invention has the advantages of smooth operation, short time, and low requirements for the actuator and the disk.
Disclosure of Invention
In view of the above problems, the present invention provides a method for precisely positioning transparent (not limited to optical transparent) homogeneous material (with a certain depth) in the depth direction, but the method is not limited to transparent and homogeneous medium, and can also be applied to heterogeneous material.
Currently, the main application scenario for using this approach is in optical storage systems using transparent, homogeneous storage materials.
The invention is implemented on the premise that servo information is prefabricated on the surface of a transparent homogeneous material, and two-dimensional plane information and time information are provided for a servo positioning system. Usable servo information includes, but is not limited to, servo information of standardized servo formats such as CD, DVD disks; and customized servo information.
The second premise is that the servo positioning system comprises means for forming two spots which are independently movable in the depth direction, defined in the planar direction, and moved in relation to each other. Currently available devices include Optical pick-up heads (OPUs) that form a double spot using a single objective lens and a double spot using a double objective lens.
The method capable of positioning in the depth direction of the single storage medium comprises the following steps:
step one, an optical head adopts a double objective lens or a double light spot;
step two, prefabricating servo surface information and a spiral line of the three-dimensional material (the preparation of the spiral line can adopt an open-loop writing mode), and writing the data layer mark information into the spiral line with a certain width;
and step three, reading the address information of the layer number marked at the specific position of the spiral line during the pre-preparation writing, and realizing the layer jump operation.
Further, the dual objective scheme in the first step includes:
the two objective lenses are horizontally arranged on the objective lens frame, and the realization of the associated motion of the two objective lenses in the horizontal direction can be ensured by the design of the objective lens frame; the objective lens 2 for reading and writing and the objective lens 1 for servo in the vertical direction move independently. The laser generates two spots through the objective lens, one for servo and the other for read and write operations of the volume storage.
Further, the dual objective scheme in the first step further includes:
a beam of light is reflected by a right-angle prism to an objective lens 1 and focused on a reference servo surface, and the reflected light is finally converged on a detector (such as a four-quadrant detector of a DVD) to generate a servo error signal; another beam of light is reflected to the objective lens 2 through the lens and the prism and finally focused on the recording layer, and the light reflected by the recording layer is also converged on another photoelectric detector to generate a data signal stored in the recording layer.
Further, in the second step, during the prefabrication, a spiral line with a certain width can be prepared by processing the bulk storage material by a femtosecond laser, and meanwhile, a certain servo format is set for the detection and reading part to obtain information including a focusing error, a tracking error and a reading channel; simulating a spiral line with a certain width to form a reflecting layer which can be similar to an optical disk, wherein the mark of the reflecting layer meets the servo bandwidth requirement of a servo system; when the preparation is successful, a specific layer is subsequently found from all the recording layers, and the process can be carried out in a closed-loop mode from the servo layer to the data layer along a spiral line at a certain speed until a specified layer is found.
Further, during the layer jump control in the third step, reading the address information on the specific position mark of the spiral line during the pre-preparation writing, and indicating that the position 1 is the first layer, the position 2 is the second layer, and the position 3 is the third layer, and performing multi-layer marking; wherein the address at 1 is 0X01, the address information at 2 is 0X02, and the address information at 3 is 0X 03.
Further, in the subsequent layer jump process, the focusing servo and the tracking servo of the servo layer used as reference need to be started, normal focusing and tracking are completed, the servo layer is locked on an information track of a woble layer, meanwhile, the objective lens 2 moves upwards from bottom to top along a spiral line at a certain speed, the servo system needs to be ensured to be always in a stable servo state while moving, at the moment, a reading channel is opened, a data signal of a pre-written mark layer number on the spiral line with a certain width is read, the information of the layer number is obtained by decoding, and the current layer number is obtained.
Another object of the present invention is to provide a system for locating on a single storage medium, applying the method for locating on a single storage medium, where the system for locating on a single storage medium includes:
the scheme determining module is used for enabling the optical head to adopt a double-objective lens or double-light-spot scheme;
the address writing module is used for writing the address with layer information into a spiral line with certain width in an open-loop writing mode;
and the layer jump control module is used for marking address information at a specific position of the spiral line during pre-preparation and writing.
It is a further object of the invention to provide a computer device comprising a memory and a processor, the memory storing a computer program which, when executed by the processor, causes the processor to perform the steps of:
the optical head adopts a double-objective lens or double-light-spot scheme; writing an address with layer information into a spiral line with a certain width by a spiral line of a prefabricated three-dimensional material in an open-loop writing mode; the address information is marked at specific positions of the spiral at the time of pre-preparation of the inscription.
It is another object of the present invention to provide a computer-readable storage medium storing a computer program which, when executed by a processor, causes the processor to perform the steps of:
the optical head adopts a double-objective lens or double-light-spot scheme; writing an address with layer information into a spiral line with a certain width by a spiral line of a prefabricated three-dimensional material in an open-loop writing mode; the address information is marked at specific positions of the spiral at the time of pre-preparation of the inscription.
Another object of the present invention is to provide an information data processing terminal for implementing the system capable of location on a single storage medium.
In combination with the technical solutions and the technical problems to be solved, please analyze the advantages and positive effects of the technical solutions to be protected in the present invention from the following aspects:
first, aiming at the technical problems existing in the prior art and the difficulty in solving the problems, the technical problems to be solved by the technical scheme of the present invention are closely combined with results, data and the like in the research and development process, and some creative technical effects are brought after the problems are solved. The specific description is as follows:
the format and the layer jump scheme based on the format provided by the invention can realize accurate layer jump operation and have important significance for subsequently realizing multi-layer data reading and writing. The spiral line with a certain width adopting the layer jump scheme only occupies less storage space for identifying the layer number, does not occupy too much storage space of a user, and further improves the storage capacity of three-dimensional storage.
Secondly, considering the technical solution as a whole or from the perspective of products, the technical effects and advantages of the technical solution to be protected by the present invention are specifically described as follows:
the invention provides a scheme capable of positioning in a single storage medium, which can ensure that different logic layers can be found in a single storage material body, and read and write operations of information data are realized.
Third, as an inventive supplementary proof of the claims of the present invention, there are also presented several important aspects:
(1) the expected income and commercial value after the technical scheme of the invention is converted are as follows:
the positioning mechanism and servo system are one of the cores of optical disc format and industry, and the patent usage cost is contained in the preparation of disc and the realization of chip and software. The volume storage is one of important directions for breaking through the limitation of optical storage capacity, and the formation of the patent has important significance for promoting the development of new optical disc systems in China and forming intellectual property barriers favorable for China.
(2) The domestic optical disk system with no body storage has blank data format including depth direction positioning, and the technical scheme of the invention fills the technical blank in the domestic and foreign fields.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments of the present invention will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a flow chart of a method for enabling location on a single storage medium according to an embodiment of the present invention;
FIG. 2 is a block diagram of a system capable of being located on a single storage medium according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a dual objective lens placement position provided by an embodiment of the present invention;
FIG. 4 is a schematic diagram of a spiral line with a certain width machined in a bulk material provided by an embodiment of the present invention;
FIG. 5 is a schematic diagram of a basic structure of a single storage medium with a servo layer and a recording layer according to an embodiment of the present invention;
FIG. 6 is a diagram illustrating an address information identification layer number on a spiral according to an embodiment of the present invention;
FIG. 7 is a schematic diagram showing the face and depth of a recording medium provided by an embodiment of the present invention;
fig. 8 is a schematic structural diagram of an optical drive servo control system constructed by an FPGA, a DSP and an ARM according to an embodiment of the present invention;
fig. 9 is a diagram of a real object of a cd-rom servo control system built by FPGA + DSP + ARM according to an embodiment of the present invention;
in the figure: 1. a scheme determination module; 2. an address write module; 3. and a layer jump control module.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In view of the problems in the prior art, the present invention provides a method, a system and an application for positioning on a single storage medium, and the present invention is described in detail below with reference to the accompanying drawings.
First, an embodiment is explained. This section is an explanatory embodiment expanding on the claims so as to fully understand how the present invention is embodied by those skilled in the art.
As shown in fig. 1, a method capable of being located on a single storage medium according to an embodiment of the present invention includes:
s101, adopting a double-objective lens or double-light-spot scheme for an optical head;
s102, writing an address with layer information into a spiral line with a certain width by a spiral line of a prefabricated three-dimensional material in an open-loop writing mode;
s103, reading the address information of the layer number marked at the specific position of the spiral line during the pre-preparation writing, and realizing the layer jump operation.
As shown in fig. 2, a system capable of being located on a single storage medium according to an embodiment of the present invention includes:
the scheme determining module 1 is used for enabling the optical head to adopt a double-objective lens scheme or a double-light-spot scheme;
the address writing module 2 is used for writing the address with layer information into a spiral line with a certain width in an open-loop writing mode of the spiral line of the prefabricated three-dimensional body material;
and the layer jump control module 3 is used for reading the layer number address information marked at the specific position of the spiral line during pre-preparation engraving so as to realize layer jump operation.
The specific embodiment of the invention is as follows:
the optical head can adopt a double-objective lens or a double-light-spot scheme, wherein the double-objective lens scheme horizontally places two objective lenses on an objective lens frame, and the two objective lenses move together in the horizontal direction, namely the radial direction, and are bound on the same radial coil as shown in fig. 3; the objective lens 2 for reading and writing in the vertical direction is free to move. Two beams of laser light pass through the objective lens to generate two light spots, one is used for servo and the other is used for reading and writing operation of volume storage. Generally speaking, a beam of light is reflected by the right-angle prism to the objective lens 1 and focused on the reference plane (wobbble layer), and the reflected light is finally converged on the four-quadrant detector to generate a servo signal. The other light beam is reflected to the objective lens 2 through a lens and a prism and finally focused on the recording layer, and the light reflected by the recording layer is also converged on the other four-quadrant detector to generate an actual recording layer data signal. The present invention focuses on how to correctly find a specific recording layer in all 20 recording layers, providing a layer jump scheme. A schematic of a single storage medium servo layer and recording layer is shown in fig. 5.
The spiral line of the prefabricated three-dimensional material writes an address with layer information on the spiral line with a certain width in an open-loop writing mode, the spiral line with a certain width can be prepared in a mode (such as dotting) of processing the storage material of the body by femtosecond laser during prefabrication, and a certain servo format can be set at the same time, wherein the servo format comprises focusing error, tracking error and information of a reading channel; the spiral with a certain width is simulated as possible to be a reflective layer similar to an optical disc, and the marks of the spiral meet the servo bandwidth requirement of a servo system. When the preparation is successful, a specific layer is subsequently found from all the recording layers, and the process can be carried out in a closed-loop manner from the servo layer to the data layer along a spiral line at a certain speed until the specific layer is found.
A schematic diagram of a spiral with a certain width machined in a bulk material is shown in fig. 4, wherein the pre-embossed track of the lowermost reference layer (wobbble) used as a servo is indicated by a blue line, and the spiral for subsequent machining of the bulk material is indicated by a yellow dotted line. The movement of the laser beam along a spiral by the focused spot of the objective lens 1 is related to the pre-embossed tracks in wobbble as follows: the spot moves horizontally along the wobbble track and vertically upwards at a rate, which together is seen to rise in a spiral along the bulk material.
The pre-embossed tracks in the wobbble of fig. 4 and the spirals in the bulk material are drawn in different colours, illustrating that the former are pre-embossed (base, precursor) and the latter are subsequently processed, for example by femtosecond processing (possibly in different forms and formats).
When the inscription is prepared in advance, address information is marked at a spiral-specific position, indicating that position 1 (address 0X01) is the first layer, position 2 (address information 0X02) is the second layer, and position 3 (address information 0X03) is the third layer, in this way, the layers are marked, as shown in fig. 6. In the subsequent layer jump process, the focusing servo and the tracking servo of a servo layer used as reference need to be started, normal focusing and tracking can be completed, the servo layer is locked on an information track of a woble layer, meanwhile, the objective lens 2 moves upwards at a certain speed from bottom to top along a spiral line, the servo system is required to be always in a stable servo state while moving, at the moment, a reading channel is opened, a data signal of a pre-written mark layer number on the spiral line with a certain width is read, the information of the number of layers is obtained by decoding, and the current layer which reaches the next layer is obtained.
And II, application embodiment. In order to prove the creativity and the technical value of the technical scheme of the invention, the part is an application example of the technical scheme of the claims to a specific product or related technology.
As shown in fig. 8 to 9, the reference plane servo required for the layer jump operation of the three-dimensional volume storage needs to be focused and tracked, and needs to be turned on, and then normal focusing and tracking are completed, and the reference plane servo is locked on the information track of the wobbble layer. A set of CD-ROM servo control system is built through the FPGA, the DSP and the ARM, and a foundation is laid for subsequent uniform volume storage layer jumping and data reading and writing.
It should be noted that the embodiments of the present invention can be realized by hardware, software, or a combination of software and hardware. The hardware portion may be implemented using dedicated logic; the software portions may be stored in a memory and executed by a suitable instruction execution system, such as a microprocessor or specially designed hardware. Those skilled in the art will appreciate that the apparatus and methods described above may be implemented using computer executable instructions and/or embodied in processor control code, such code being provided on a carrier medium such as a disk, CD-or DVD-ROM, programmable memory such as read only memory (firmware), or a data carrier such as an optical or electronic signal carrier, for example. The apparatus and its modules of the present invention may be implemented by hardware circuits such as very large scale integrated circuits or gate arrays, semiconductors such as logic chips, transistors, or programmable hardware devices such as field programmable gate arrays, programmable logic devices, etc., or by software executed by various types of processors, or by a combination of hardware circuits and software, e.g., firmware.
And thirdly, evidence of relevant effects of the embodiment. The embodiment of the invention achieves some positive effects in the process of research and development or use, and has great advantages compared with the prior art, and the following contents are described by combining data, diagrams and the like in the test process.
Compared with the prior art, the layer jump scheme for uniform medium storage provided by the invention can realize more accurate interlayer movement, has shorter required time and higher speed, and has higher tolerance to the disc.
The above description is only for the purpose of illustrating the present invention and the appended claims are not to be construed as limiting the scope of the invention, which is intended to cover all modifications, equivalents and improvements that are within the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A method of enabling location on a single storage medium, the method comprising:
step one, adopting a double objective lens or a double light spot group as an optical head;
step two, prefabricating spiral lines of servo surface information and three-dimensional materials, and writing the data layer mark information into the spiral lines with certain width;
and step three, reading the address information of the layer number marked at the specific position of the spiral line during the pre-preparation writing, and realizing the layer jump operation.
2. The method of claim 1, wherein the dual objective lens of the first step comprises:
horizontally placing two objective lenses on an objective lens frame, wherein the two objective lenses are bound on the same radial coil in the horizontal direction and move together; the objective lens 2 for reading and writing in the vertical direction moves freely; two beams of laser light pass through the objective lens to generate two light spots, one is used for servo and the other is used for reading and writing operation of volume storage.
3. The method of claim 1, wherein the dual objective lens of step one further comprises:
a beam of light is reflected to the objective lens 1 by the right-angle prism and focused on a reference surface, and the reflected light is finally converged on the four-quadrant detector to generate a servo signal; another beam of light is reflected to the objective lens 2 through a lens and a prism and finally focused on the recording layer, and the light reflected by the recording layer is also converged on another four-quadrant detector to generate an actual recording layer data signal.
4. The method for positioning on a single storage medium according to claim 1, wherein the step two is preformed by processing the bulk storage material by means of femtosecond laser, for example, to prepare a spiral line with a certain width, and setting a certain servo format including focus error, tracking error and marks of a read channel; simulating a spiral line with a certain width into a reflecting layer similar to an optical disk to meet the servo bandwidth requirement of a servo system; when the preparation is successful, a specific layer is found from all the recording layers in a closed-loop mode, and the spiral line is climbed from bottom to top at a certain speed until the required specific layer is found.
5. The method of claim 1, wherein the address information is marked at a spiral specific position in the step three when the pre-prepared inscription indicates that the position 1 is the first layer, the position 2 is the second layer, and the position 3 is the third layer, and a multi-layer marking is performed; wherein the address at 1 is 0X01, the address information at 2 is 0X02, and the address information at 3 is 0X 03.
6. The method as claimed in claim 5, wherein during subsequent layer jump, the focusing servo and tracking servo of the servo layer used as reference are turned on, and complete normal focusing and tracking, and lock on the information track of the wobbble layer, and the objective lens 2 moves upward from bottom to top along the spiral line at a certain speed, while moving, it is necessary to ensure that the servo system is always in a stable servo state, at this time, the read channel is opened, the data signal of the pre-written mark layer number on the spiral line with a certain width is read, and the information of the layer number is obtained by decoding, so as to obtain the layer number which has reached currently.
7. A system capable of being positioned on a single storage medium by applying the method capable of being positioned on a single storage medium according to any one of claims 1 to 6, wherein the system capable of being positioned on a single storage medium comprises:
the scheme determining module is used for enabling the optical head to adopt a double objective lens or a double light spot;
the address writing module is used for writing the address with layer information into a spiral line with certain width in an open-loop writing mode;
and the layer jump control module is used for reading the layer number address information marked at the specific position of the spiral line during the pre-preparation engraving and realizing the layer jump operation.
8. A computer device, characterized in that the computer device comprises a memory and a processor, the memory storing a computer program which, when executed by the processor, causes the processor to carry out the steps of:
the optical head adopts a double-objective lens or double-light-spot scheme; writing an address with layer information into a spiral line with a certain width by a spiral line of a prefabricated three-dimensional material in an open-loop writing mode; the address information is marked at specific positions of the spiral at the time of pre-preparation of the inscription.
9. A computer-readable storage medium storing a computer program which, when executed by a processor, causes the processor to perform the steps of:
the optical head adopts a double-objective lens or double-light-spot scheme; writing an address with layer information into a spiral line with a certain width by a spiral line of a prefabricated three-dimensional material in an open-loop writing mode; the address information is marked at specific positions of the spiral at the time of pre-preparation of the inscription.
10. An information data processing terminal characterized by being used for implementing the system capable of being located on a single storage medium according to claim 7.
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Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114627900B (en) | 2023-07-04 |
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