Data reading and writing method, device and system

Abstract

The present application discloses a data reading and writing method, device and system, which belongs to the field of storage technology. The data reading and writing device includes: a light-emitting component, a modulator, a rotating mirror and a read-write optical head. The light-emitting component is used to generate a write optical signal; the modulator is used to receive the write optical signal, and modulate the write optical signal based on multiple data respectively, so as to generate multiple modulated optical signals in sequence; the rotating mirror can rotate, and the rotating mirror is used to receive the multiple modulated optical signals in sequence, and in the process of rotation, based on the multiple reflective surfaces in the rotating mirror, generate multiple first reflected light signals of the multiple modulated light signals in sequence. The read-write optical head is used to receive the multiple first reflected light signals generated by the rotating mirror respectively, and focus the multiple first reflected light signals on the optical storage medium respectively. The present application solves the problem of limited improvement in the speed of writing data in a data reading and writing device, and the present application is used for a data reading and writing device.

Description

Technical Field

[0001] The present application relates to the field of storage technology, and in particular to a data reading and writing method, device and system. Background Art

[0002] With the development of science and technology, data reading and writing devices (such as optical drives) are increasingly used in people's production and life. Data reading and writing devices can write data into optical storage media (such as optical disks).

[0003] For example, a data read / write device typically includes a read / write optical head and a rotating shaft. The rotating shaft is used to support an optical storage medium and is capable of driving the optical storage medium in rotation. When writing data to the optical storage medium, the read / write optical head transmits multiple modulated optical signals corresponding to the data to be written to the optical storage medium. The rotating shaft drives the optical storage medium to rotate, causing the multiple modulated optical signals to sequentially illuminate different locations in the optical storage medium, thereby writing data to the optical storage medium.

[0004] When the data writing speed needs to be increased, the speed at which the rotating shaft drives the optical storage medium also needs to be increased accordingly. However, when the optical storage medium's rotation speed is increased to a certain level, the jitter noise caused by the high-speed rotation of the optical storage medium becomes large, affecting the accuracy of the data reading and writing device when writing data to the optical storage medium. Therefore, the increase in the data writing speed of the data reading and writing device is limited. Summary of the Invention

[0005] The present application provides a data reading and writing method, device, and system, which can solve the problem of limited improvement in the data writing speed of a data reading and writing device. The technical solution is as follows:

[0006] In a first aspect, a data reading and writing device is provided, comprising: a light-emitting component, a modulator, a rotating mirror, and a read / write optical head. The light-emitting component is used to generate a write optical signal; the modulator is used to receive the write optical signal generated by the light-emitting component and modulate the write optical signal based on multiple data to be written, thereby sequentially generating multiple modulated optical signals; the rotating mirror is capable of rotating, and the rotating mirror includes multiple reflective surfaces sequentially arranged along its rotation direction. The rotating mirror is used to sequentially receive the multiple modulated optical signals modulated by the modulator, and during the rotation process, sequentially generate multiple first reflected optical signals of the multiple modulated optical signals based on the multiple reflective surfaces in the rotating mirror, wherein one modulated optical signal corresponds to one first reflected optical signal. The read / write optical head is used to respectively receive the multiple first reflected optical signals generated by the rotating mirror and respectively focus the multiple first reflected optical signals on an optical storage medium to write multiple data to the optical storage medium.

[0007] In the data reading and writing device provided by the present application, a rotating mirror sequentially reflects multiple modulated light signals modulated by a modulator to obtain multiple first reflected light signals corresponding to the multiple modulated light signals. These multiple first reflected light signals are then focused by a read / write optical head to different positions on an optical storage medium, thereby writing multiple data corresponding to the multiple modulated light signals onto the optical storage medium. Because the data reading and writing device provided by the present application primarily writes data onto the optical storage medium through the rotation of the rotating mirror, it can reduce jitter noise caused by the high-speed rotation of the optical storage medium. Therefore, while ensuring data writing accuracy, the data writing speed of the data reading and writing device can be improved.

[0008] Furthermore, since the data reading and writing device provided in the embodiment of the present application mainly writes data on the optical storage medium by rotating the rotating mirror, the jitter noise caused by the high-speed rotation of the optical storage medium can be reduced, and therefore the servo difficulty is also relatively low.

[0009] Furthermore, the data writing speed of the data reading and writing device provided by the present application is related to the rotation speed of the rotating mirror, and the rotation speed of the rotating mirror is often faster, so the data writing speed of the data reading and writing device is faster.

[0010] Optionally, the data reading and writing device provided in this application can not only write data to an optical storage medium, but also read data stored in the optical storage medium. For example, the light-emitting assembly is further configured to generate a read light signal; the rotating mirror is further configured to receive the read light signal generated by the light-emitting assembly and, during rotation, sequentially generate multiple second reflected light signals of the read light signal based on the multiple reflective surfaces; the read / write optical head is configured to respectively receive the multiple second reflected light signals from the rotating mirror and respectively focus the multiple second reflected light signals onto the optical storage medium to read the data stored in the optical storage medium.

[0011] In the data reading and writing device provided in the embodiment of the present application, a rotating mirror reflects the read light signal generated by the light-emitting component to obtain multiple second reflected light signals, so that the multiple second reflected light signals are focused to different positions on the optical storage medium by the read / write optical head, thereby reading the data stored in the optical storage medium. Because the data reading and writing device provided in the embodiment of the present application mainly reads data from the optical storage medium by rotating the rotating mirror, it can reduce the jitter noise caused by the high-speed rotation of the optical storage medium. Therefore, while ensuring data reading accuracy, the data reading speed of the data reading and writing device can be improved. Moreover, because the data reading and writing device provided in the embodiment of the present application mainly reads data from the optical storage medium by rotating the rotating mirror, it can reduce the jitter noise caused by the high-speed rotation of the optical storage medium. Therefore, the servo difficulty is also relatively low. Furthermore, the data reading speed of the data reading and writing device provided in the embodiment of the present application is related to the rotation speed of the rotating mirror. Since the rotation speed of the rotating mirror is often faster, the data reading speed of the data reading and writing device is faster.

[0012] Optionally, the data reading and writing device further includes a support platform for supporting the optical storage medium; the support platform is further configured to drive the optical storage medium to rotate or translate in a plane perpendicular to the axial direction of the optical read / write head. The support platform may be an air-floating platform or other platform capable of driving the optical storage medium to rotate or translate.

[0013] In the data reading and writing device provided in the embodiments of the present application, not only does the rotating mirror rotate during the reading and writing of data on the optical storage medium, but the supporting platform also drives the optical storage medium to move or rotate, thereby enabling data to be read and written at different locations on the optical storage medium. When the speed of reading and writing data is relatively fast, since the data reading and writing device primarily writes data through the rotation of the rotating mirror, the requirements for the speed at which the supporting platform drives the optical storage medium to move or rotate are relatively low. In this case, the jitter noise caused by the movement or rotation of the optical storage medium is relatively small, thereby improving the accuracy of the data reading and writing device in reading and writing data on the optical storage medium.

[0014] Optionally, the optical storage medium is used to generate multiple feedback optical signals of the multiple second reflected optical signals, wherein each second reflected optical signal corresponds to a feedback optical signal; the data reading and writing device also includes: a selection lens and a detector, and the read-write optical head is also used to transmit the multiple feedback optical signals; the selection lens is used to receive the modulated optical signal and the read optical signal, and transmit the modulated optical signal and the read optical signal; the selection lens is also used to receive the multiple feedback optical signals in sequence, and reflect the multiple feedback optical signals to the detector in sequence; the detector is used to receive the multiple feedback optical signals in sequence, and obtain the data stored in the optical storage medium according to the feedback optical signals.

[0015] It should be noted that after each second reflected light signal is focused on the optical storage medium, the optical storage medium generates a feedback light signal corresponding to the second reflected light signal based on the second reflected light signal. The feedback light signal carries information about the data stored in the optical storage medium, and the data in the optical storage medium can be retrieved based on the feedback light signal. For example, the feedback light signal can be an optical signal formed after the optical storage medium reflects the second reflected light signal, or the feedback light signal can be a fluorescence signal emitted by the optical storage medium under the stimulation of the second reflected light signal.

[0016] It can be seen that the modulated light signal, the read light signal and the feedback light signal are distinguished by the selection lens, so that the detector can obtain the feedback light signal and then read the data according to the feedback light signal. It should be noted that in the embodiment of the present application, the feedback light signal directly reaches the selection lens after being transmitted from the read-write optical head, and does not pass through the rotating mirror. Optionally, the feedback light signal can also be reflected on the rotating mirror after being transmitted from the read-write optical head, and then reach the selection lens, and then reach the detector. At this time, the rotating mirror is also used to receive multiple feedback light signals in sequence, and reflect the multiple feedback light signals to the selection lens based on the multiple reflection surfaces during the rotation process.

[0017] Optionally, the data reading and writing device further includes: a deflection mirror, configured to receive the modulated light signal and reflect the modulated light signal to the rotating mirror, and to receive the read light signal and reflect the read light signal to the rotating mirror.

[0018] Optionally, the light-emitting component includes: a write light-emitting unit for generating the write light signal; a read light-emitting unit for generating the read light signal; the deflection mirror is also used to move to a first position in the light-emitting direction of the modulator when the write light-emitting unit generates the write light signal, and to move to a second position in the light-emitting direction of the read light-emitting unit when the read light-emitting unit generates the read light signal.

[0019] The data reading and writing device provided by the embodiments of the present application switches the position of the deflection mirror during data reading and writing to reflect both the modulated light signal and the read light signal onto the rotating mirror. This eliminates the need for separate reflective mirrors in the light-emitting direction of the modulator and the read-light unit, thereby simplifying the structure of the data reading and writing device.

[0020] Optionally, at least some components of the data reading and writing device can operate under the control of a controller. In this case, the data reading and writing device may further include a controller. The controller may be connected to the aforementioned light-emitting assembly, rotating mirror, supporting platform, deflection mirror, switch, encoder, decoder, and adjustment assembly. The controller is configured to: control the light-emitting assembly to generate write and read optical signals; send multiple data to be written to the encoder; control the rotation of the rotating mirror; control the supporting platform to drive the optical storage medium to rotate or translate; control the deflection mirror to switch between the aforementioned first and second positions; control the deflection mirror to swing; control the switch to open and close; receive data decoded by the decoder; and control the adjustment assembly to drive the read / write optical head to move.

[0021] Optionally, the data reading and writing device provided in an embodiment of the present application can perform servo calibration before reading and writing the optical storage medium, or during the reading and writing process of the optical storage medium. For example, when the data reading and writing device includes a controller, the controller can be used to control the oscillation of the deflection mirror to adjust the focus position of the read / write optical head, and / or the controller can be used to control the read / write optical head (for example, by controlling the read / write optical head through an adjustment component) to move along the axial direction to adjust the focus position of the read / write optical head.

[0022] Optionally, the controller is used to: when there is a deviation between the focus and the marking point in the optical storage medium in the axial direction of the read / write optical head, control the read / write optical head to move along the axial direction so that the focus moves along the axial direction; when there is a deviation between the focus and the marking point in the direction perpendicular to the axial direction, control the deflection mirror to swing so that the focus moves on a plane perpendicular to the axial direction.

[0023] Optionally, the optical storage medium includes: a plurality of rectangular areas; the width direction of each rectangular area corresponds to a scanning direction of the optical signal generated by the reflective surface in the optical storage medium, and the plurality of rectangular areas are sequentially arranged along the scanning direction; and the marking points are located in edge areas of the rectangular areas. Because the edge areas of the optical storage medium where the marking points are located are not areas for storing data, the presence of marking points in the optical storage medium can be prevented from affecting data reading and writing.

[0024] Optionally, the rectangular area includes: a central area, and two edge areas located on either side of the central area in the scanning direction; the marking points of the two edge areas correspond one-to-one, and when the scanning area of the optical storage medium by the light signal generated by the reflective surface is within the rectangular area, the corresponding marking points in the two edge areas are located in the same scanning area; it can be seen that when the light signal generated by the reflective surface in the rotating mirror scans a rectangular area in the optical storage medium, the light signal scanning the two corresponding marking points in the two edge areas is generated by the same reflective surface. Because the two edge areas of the rectangular area have one-to-one corresponding marking points, when the light signal reflected by each reflective surface in the rotating mirror scans the rectangular area, the reflective surface can scan a group of corresponding marking points, thereby allowing the data reading and writing device to read / write the optical storage medium while performing servo correction based on the scanned group of corresponding marking points.

[0025] Optionally, the controller is further configured to adjust the rotation speed of the rotating mirror according to a time difference between reading data of corresponding marking points in the two edge areas.

[0026] Optionally, the optical storage medium includes: multiple storage layers, each of which has the marking points, and the marking points in at least two of the storage layers have deviations in their orthographic projections on a plane perpendicular to the axial direction. For example, the marking points of the multiple storage layers have deviations in their orthographic projections on a plane perpendicular to the axial direction of the read / write optical head (such as non-overlapping). Optionally, in each rectangular area, the marking points of the multiple storage layers in each edge area can be arranged in sequence along a direction close to the middle area. Due to the staggered arrangement of the marking points, when the marking points are points for reflecting light signals (such as carbonized points), these marking points do not affect each other, thereby avoiding the second reflected light signal emitted by the data reading and writing device to a certain marking point from being simultaneously emitted to other marking points, thereby avoiding deviations in the data of the read marking points and improving the accuracy of servo correction based on the marking points.

[0027] Optionally, the controller may be further configured to detect a data writing speed and a data reading speed, and compare the detected data writing speed with a desired target writing speed, and compare the detected data reading speed with a desired target reading speed. If there is a deviation between the detected data writing speed and the target writing speed, and / or if there is a deviation between the detected data reading speed and the target reading speed, the rotation speed of the rotating mirror may be adjusted.

[0028] Optionally, the light-emitting component is used to generate n beams of the write light signal and n beams of the read light signal, where n>1; accordingly, the data reading and writing device includes: n modulators and n detectors, and the multiple data includes: n groups of data; wherein the i-th modulator is used to receive the i-th write light signal and modulate the i-th write light signal based on the i-th group of data; and the i-th detector is used to receive the feedback light signal of the second reflected light signal of the i-th read light signal. When the light-emitting component generates multiple write light signals and multiple read light signals, during the rotation of the rotating mirror, the reflected light signal generated by the rotating mirror has a larger scanning area on the optical storage medium, and the reflected light signal has a larger scanning area on the optical storage medium. Therefore, the data reading and writing device scans the optical storage medium faster, so that the data reading and writing rate can be further improved.

[0029] Optionally, the n beams of write light signals and the n beams of read light signals are divided into multiple groups of light signals, each group of light signals includes at least one beam of light signal; the reflective surface includes: multiple reflective areas corresponding one-to-one to the multiple groups of light signals, and the data reading and writing device includes: multiple read-write optical heads corresponding one-to-one to the multiple groups of light signals; the rotating mirror is used to generate reflected light signals of each group of light signals based on the corresponding reflection areas of each group of light signals in the multiple reflective surfaces during the rotation process; the read-write optical head is used to respectively receive the reflected light signals of each corresponding group of light signals, and respectively focus the reflected light signals of each corresponding group of light signals on the optical storage medium.

[0030] It can be seen that when the n beams of writing light signals and the n beams of reading light signals are divided into multiple groups of light signals, the data reading and writing device includes a rotating mirror and multiple read-write optical heads corresponding to the multiple groups of light signals. Each reflecting surface in the rotating mirror can be divided into multiple reflecting areas corresponding to the multiple groups of light signals. Each group of light signals will be emitted to the corresponding reflecting area in the reflecting surface, and the reflecting area will generate a reflected light signal of the group of light signals, and emit the reflected light signal of the group of light signals to the read-write optical head corresponding to the group of light signals. The read-write optical head will focus the reflected light signal of the group of light signals on the optical storage medium. Since the data reading and writing device includes multiple read-write optical heads, and the multiple read-write optical heads can respectively focus the reflected light signals of the multiple groups of light signals on the optical storage medium to read and write the optical storage medium, the efficiency of the data reading and writing device in reading and writing the optical storage medium is improved.

[0031] Optionally, the n beams of the write light signals and the n beams of the read light signals are divided into multiple groups of light signals, each group of light signals includes at least one beam of light signal; the data reading and writing device includes: multiple rotating mirrors corresponding one-to-one to the multiple groups of light signals, and the data reading and writing device includes: multiple read-write optical heads corresponding one-to-one to the multiple groups of light signals; the rotating mirror is used to generate a reflected light signal of a group of light signals corresponding to the rotating mirror based on the multiple reflecting surfaces during the rotation process; the read-write optical head is used to respectively receive the reflected light signals of the corresponding group of light signals, and respectively focus the reflected light signals of the corresponding group of light signals on the optical storage medium.

[0032] It can be seen that when the n beams of write optical signals and the n beams of read optical signals are divided into multiple groups of optical signals, the data reading and writing device includes multiple rotating mirrors corresponding to the multiple groups of optical signals, and multiple read-write optical heads corresponding to the multiple groups of optical signals. Each group of optical signals will be directed to the corresponding rotating mirror, and the rotating mirror will generate a reflected light signal of the group of optical signals, and direct the reflected light signal of the group of optical signals to the read-write optical head corresponding to the group of optical signals. The read-write optical head will focus the reflected light signal of the group of optical signals on the optical storage medium. Since the data reading and writing device includes multiple read-write optical heads, and the multiple read-write optical heads can respectively focus the reflected light signals of the multiple groups of optical signals on the optical storage medium to read and write the optical storage medium, the efficiency of the data reading and writing device in reading and writing the optical storage medium is improved.

[0033] In the second aspect, the present application provides a data reading and writing method, which can be executed by any data reading and writing device provided in the first aspect, and the data reading and writing method includes: first, the light-emitting component generates a write light signal; second, the modulator receives the write light signal generated by the light-emitting component, and modulates the write light signal based on the multiple data to be written, so as to generate multiple modulated light signals in sequence; the rotating mirror receives the multiple modulated light signals modulated by the modulator in sequence, and generates multiple first reflected light signals of the multiple modulated light signals based on the multiple reflecting surfaces of the rotating mirror during the rotation process, wherein one modulated light signal corresponds to one first reflected light signal, and the multiple reflecting surfaces are arranged in sequence along the rotation direction; finally, the read-write optical head receives the multiple first reflected light signals respectively, and focuses the multiple reflected light signals on the optical storage medium respectively to write the multiple data into the optical storage medium.

[0034] Optionally, the data reading and writing method also includes: first, the light-emitting component generates a reading light signal, then the rotating mirror receives the reading light signal and generates multiple second reflected light signals of the reading light signal in sequence based on the multiple reflecting surfaces during the rotation process; finally, the read-write optical head receives the multiple second reflected light signals respectively, and focuses the multiple second reflected light signals on the optical storage medium respectively to read the data stored in the optical storage medium.

[0035] Optionally, the data reading and writing method further includes: the supporting platform drives the optical storage medium supported by the supporting platform to rotate or translate on a plane perpendicular to the axial direction of the read / write optical head.

[0036] Optionally, the data reading and writing method further includes: transmitting a plurality of feedback light signals through a read / write optical head; receiving the modulated light signal and the read light signal through a selection lens, and transmitting the modulated light signal and the read light signal; sequentially receiving the plurality of feedback light signals through the selection lens, and sequentially reflecting the plurality of feedback light signals to the detector; and sequentially receiving the plurality of feedback light signals through the detector, and obtaining data stored in the optical storage medium based on the feedback light signals. The plurality of feedback light signals are light signals generated by the optical storage medium based on the plurality of second reflected light signals, and each feedback light signal corresponds to one second reflected light signal.

[0037] Optionally, the data reading and writing method further includes: the rotating mirror sequentially receiving a plurality of feedback light signals, and reflecting the plurality of feedback light signals toward the selection lens based on the plurality of reflection surfaces during the rotation process.

[0038] Optionally, the data reading and writing method further includes: a deflection mirror receiving the modulated light signal and reflecting the modulated light signal to the rotating mirror, and receiving the read light signal and reflecting the read light signal to the rotating mirror.

[0039] Optionally, the data reading and writing method also includes: the deflection mirror moves to a first position in the light emitting direction of the modulator when the write light unit generates the write light signal, and moves to a second position in the light emitting direction of the read light unit when the read light unit generates the read light signal.

[0040] Optionally, the data reading and writing method further includes: a controller controlling the deflection mirror to swing to adjust the focus position of the read / write optical head, and / or a controller controlling the read / write optical head to move along the axial direction to adjust the focus position of the read / write optical head.

[0041] Optionally, the controller controls the read / write optical head to move in the axial direction to adjust the position of the focus of the read / write optical head, including: when there is a deviation between the focus and the mark point in the optical storage medium in the axial direction of the read / write optical head, the controller controls the read / write optical head to move in the axial direction to move the focus in the axial direction. The controller controls the deflection mirror to swing to adjust the position of the focus of the read / write optical head, including: when there is a deviation between the focus and the mark point in a direction perpendicular to the axial direction, the controller controls the deflection mirror to swing to move the focus in a plane perpendicular to the axial direction.

[0042] Optionally, the data reading and writing method further includes: the controller adjusting the rotation speed of the rotating mirror according to the reading time difference of the data of the corresponding marking points in the two edge areas.

[0043] In a third aspect, an embodiment of the present application provides an optical storage medium having marking points.

[0044] Optionally, the optical storage medium includes: multiple rectangular areas; the width direction of the rectangular area is the scanning direction of the light signal generated by the reflecting surface in the optical storage medium, and the multiple rectangular areas are arranged in sequence along the scanning direction; the marking point is located in the edge area of the rectangular area.

[0045] Optionally, the rectangular area includes: a middle area, and two edge areas located on both sides of the middle area in the scanning direction; the marking points of the two edge areas correspond to each other one by one, and when the scanning area of the light signal generated by the reflecting surface in the optical storage medium is located within the rectangular area, the corresponding marking points in the two edge areas are located in the same scanning area.

[0046] In a fourth aspect, a data reading and writing system is provided, comprising: an optical storage medium and any one of the data reading and writing devices provided in the first aspect. Optionally, the optical storage medium may be any one of the optical storage media provided in the third aspect.

[0047] The beneficial effects of the second to fourth aspects mentioned above can be referred to the beneficial effects of the corresponding features in the first aspect, and this application will not elaborate on them here. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 A schematic diagram of the structure of a storage system provided in an embodiment of the present application;

[0049] Figure 2 A schematic diagram of the structure of a data reading and writing device provided in an embodiment of the present application;

[0050] Figure 3 A schematic diagram of the structure of another data reading and writing device provided in an embodiment of the present application;

[0051] Figure 4 A schematic diagram of the structure of another data reading and writing device provided in an embodiment of the present application;

[0052] Figure 5 A schematic diagram of scanning an optical signal provided in an embodiment of the present application;

[0053] Figure 6 A schematic diagram of another optical signal scanning method provided in an embodiment of the present application;

[0054] Figure 7 A schematic diagram of another optical signal scanning method provided in an embodiment of the present application;

[0055] Figure 8A schematic diagram of a data reading process of a data reading and writing device provided in an embodiment of the present application;

[0056] Figure 9 A schematic diagram of a data reading and writing process of a data reading and writing device provided in an embodiment of the present application;

[0057] Figure 10 A schematic diagram of the movement of a read / write optical head provided in an embodiment of the present application;

[0058] Figure 11 A schematic diagram of the movement of another read / write optical head provided in an embodiment of the present application;

[0059] Figure 12 A schematic diagram of the swing of a deflection mirror provided in an embodiment of the present application;

[0060] Figure 13 A schematic diagram of the swing of another deflection mirror provided in an embodiment of the present application;

[0061] Figure 14 A schematic diagram of the position of a marking point provided in an embodiment of the present application;

[0062] Figure 15 A method provided in the embodiment of this application Figure 14 Schematic diagram of the mid-section PP';

[0063] Figure 16 A schematic diagram of multiple groups of optical signals provided in an embodiment of the present application;

[0064] Figure 17 A schematic diagram of another plurality of optical signals provided in an embodiment of the present application;

[0065] Figure 18 A flowchart of a data reading and writing method provided in an embodiment of the present application;

[0066] Figure 19 A flowchart of another data reading and writing method provided in an embodiment of the present application. DETAILED DESCRIPTION

[0067] In order to make the principles and technical solutions of the present application clearer, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0068] Figure 1 A schematic diagram of a storage system provided in an embodiment of the present application is shown in FIG. Figure 1 As shown, the storage system includes: an optical storage medium 01 and a data reading and writing device 02.

[0069] The optical storage medium 01 can be any medium that stores data based on the received optical signal. The optical storage medium 01 can change its properties under the action of a certain optical signal. For example, after a certain optical signal is incident on the optical storage medium 01, the reflectivity of the optical storage medium 01 changes; or, after a certain optical signal is incident on the optical storage medium 01, the optical storage medium 01 can stimulate fluorescence, etc.

[0070] The data reading and writing device 02 can read and write data on the optical storage medium 01 by emitting an optical signal to the optical storage medium 01. For example, the data reading and writing device 02 can write the data in the optical storage medium 01 by emitting a modulated optical signal corresponding to the data to be written to the optical storage medium 01. The data reading and writing device 02 can also emit a reading optical signal to the optical storage medium 01 so that the position to be read generates a feedback optical signal based on the reading optical signal, and then the data reading and writing device 02 can obtain the data stored in the optical storage medium based on the feedback optical signal. The feedback optical signal can be an optical signal formed by the position to be read reflecting the reading optical signal, or a fluorescent signal emitted by the position to be read under the excitation of the reading optical signal, which is not limited in the embodiments of the present application.

[0071] It should be noted that the modulated optical signal can reflect the data to be written, and the modulated optical signal emitted to the optical storage medium can change the properties of the optical storage medium, thereby writing the data to be written to the optical storage medium. For example, the intensity level of the modulated optical signal corresponds one-to-one to the state value of the data to be written. When the data to be written has two state values (0 and 1, respectively), the modulated optical signal can have two intensity levels corresponding one-to-one to the two state values, for example, intensity level 1 corresponding to state value 0, and intensity level 2 corresponding to state value 1. When optical signals of different intensity levels are irradiated onto the optical storage medium, the properties of the optical storage medium change to different degrees. In this way, the data to be written can be written to the optical storage medium.

[0072] Of course, the data to be written can also have more than two state values. In this case, the intensity levels of the modulated optical signal can also be increased accordingly. For example, when the data to be written has four state values (00, 01, 10, and 11), the modulated optical signal can have four intensity levels corresponding to the four state values. For example, state value 0 corresponds to intensity level 1, state value 1 corresponds to intensity level 2, state value 2 corresponds to intensity level 3, and state value 3 corresponds to intensity level 4.

[0073] In addition, since the properties of the optical storage medium at a certain position will change when data is written to the optical storage medium, when the data at that position is read, the feedback light signal generated at that position can reflect the change in the properties of the optical storage medium at that position, and then read the data stored at that position based on the change.

[0074] For example, Figure 2 A schematic diagram of the structure of a data reading and writing device provided in an embodiment of the present application is shown in FIG. Figure 2 As shown, the data reading and writing device includes a reading and writing optical head 0211 and a rotating shaft 0212. When the optical disc (an optical storage medium) is placed outside the rotating shaft 0212, the rotating shaft 0212 can rotate to drive the optical disc to rotate. When writing data to the optical disc, the reading and writing optical head 0211 sequentially transmits multiple modulated light signals corresponding to the multiple data to be written to the optical disc; at the same time, the rotating shaft 0212 drives the optical disc to rotate so that the multiple modulated light signals are sequentially emitted to different positions in the optical disc, thereby writing the multiple data on the optical disc. When the speed of writing data needs to be increased, the speed at which the rotating shaft 0212 drives the optical disc to rotate also needs to be increased accordingly. However, when the speed of the optical disc rotation is increased to a certain level, the jitter noise caused by the rotation of the optical disc is large, affecting the accuracy of the data reading and writing device in writing data on the optical storage medium. Therefore, the increase in the speed at which the data reading and writing device can write data is limited.

[0075] The process of a data read / write device reading data from an optical disc can be compared to the process of a data read / write device writing data to an optical disc. Furthermore, when the data reading speed needs to be increased, the speed at which the optical disc is rotated by the rotating shaft 0212 also needs to be increased accordingly. However, when the optical disc rotation speed is increased to a certain level, the jitter noise caused by the rotation of the optical disc becomes large, affecting the accuracy of the data read / write device in reading data from the optical storage medium. Therefore, the increase in the data reading speed of the data read / write device is also limited.

[0076] and, Figure 2 The data reading and writing speed of the data reading and writing device shown is related to the speed at which the optical storage medium (such as the above-mentioned optical disc) is driven by the rotating shaft. However, the speed at which the optical storage medium is driven by the rotating shaft is limited, which limits the improvement of the data reading and writing speed.

[0077] Further, Figure 2 The data reading and writing device shown may also include a servo unit 0213, and a servo unit 0214 connected to the optical read / write head 0211. The servo unit 0214 is used to adjust the position of the optical read / write head 0211 during the data reading and writing process of the data reading and writing device, so that the optical signals (such as the modulated optical signal and the read optical signal) emitted by the optical read / write head 0211 for reading and writing data can be effectively directed to the optical storage medium, thereby improving the accuracy of data reading and writing. However, when the data reading and writing speed needs to be increased, the rotation speed of the optical disc also needs to be increased accordingly. In this case, it is more difficult for the servo unit 0213 to adjust the position of the optical read / write head 0211.

[0078] visible, Figure 2The data reading and writing speed of the data reading and writing device shown is limited, and the servo difficulty is relatively high. The present application provides another data reading and writing device that primarily reads and writes data on an optical storage medium through the rotation of a rotating mirror, which can reduce the jitter noise caused by the high-speed rotation of the optical storage medium. Therefore, while ensuring data reading and writing accuracy, the data reading and writing speed of the data reading and writing device can be improved, and the servo difficulty is relatively low.

[0079] For example, Figure 3 This is a structural diagram of another data reading and writing device provided in an embodiment of the present application, such as Figure 3 As shown, the data reading and writing device 30 includes: a light emitting component 301, a modulator 302, a rotating mirror 303 and a reading and writing optical head 304.

[0080] The light emitting component 301 is used to generate a write optical signal. The write optical signal can be any optical signal, such as a pulsed laser (e.g., a femtosecond laser) or a continuous laser (e.g., a continuous semiconductor laser), etc., and this embodiment of the present application is not limited thereto. The wavelength of the write optical signal can be any wavelength, for example, the wavelength of the write optical signal is 405 nanometers (nm), 488 nm, or 500 nm.

[0081] The modulator 302 is used to receive the write optical signal generated by the light-emitting component 301 and modulate the write optical signal based on the multiple data to be written to generate multiple modulated optical signals in sequence. When modulating the write optical signal based on each data, the modulator 302 can modulate the intensity level of the write optical signal according to the state value of the data to obtain a modulated optical signal corresponding to the data, so that the intensity level of the modulated optical signal corresponds to the state value of the data, so that the modulated optical signal can reflect the data. The modulator 302 can be any device that can modulate an optical signal, such as an acousto-optical modulator (AOM), an electro-optical modulator (EOM), etc.

[0082] The rotating mirror 303 has a Figure 3 Multiple reflecting surfaces C are arranged in sequence (direction B in the figure, or the opposite direction of direction B). Figure 3 In the example, the rotating mirror 303 has 12 reflecting surfaces C. Optionally, the number of reflecting surfaces C in the rotating mirror 303 can also be other numbers, such as 2, 18 or 36, etc., which is not limited in this embodiment of the present application. Figure 3The rotating mirror 303 may include a rotating shaft 3031 and a cylindrical body 3032. The cylindrical body 3032 is fixed to the outside of the rotating shaft 3031. The rotating shaft 3031 can drive the cylindrical body 3032 to rotate. The outer surface of the cylindrical body 3032 has the aforementioned multiple reflective surfaces C. The rotating mirror 303 is configured to sequentially receive multiple modulated optical signals modulated by the modulator 302 and, during rotation, sequentially generate multiple first reflected optical signals of the multiple modulated optical signals based on the multiple reflective surfaces of the rotating mirror 303. Each modulated optical signal corresponds to a first reflected optical signal, and each modulated optical signal, after being reflected on a reflective surface, generates a first reflected optical signal corresponding to the modulated optical signal.

[0083] The optical read / write head 304 is configured to receive the plurality of first reflected light signals generated by the rotating mirror 303 and focus the plurality of first reflected light signals onto the optical storage medium to write the plurality of data onto the optical storage medium. The optical read / write head 304 may include an objective lens, and the numerical aperture of the optical read / write head 304 may be any value, such as 0.95. The focal point of the optical read / write head 304 may be located on the optical storage medium, and the optical read / write head 304 is capable of focusing the light signals (such as the first reflected light signals) from the rotating mirror 303 onto the optical storage medium.

[0084] Because the data carried by each first reflected light signal is identical to the data carried by the modulated light signal corresponding to the first reflected light signal, after the first reflected light signal is focused onto the optical storage medium, the first reflected light signal can change the properties of the optical storage medium, thereby writing the data corresponding to the modulated light signal corresponding to the first reflected light signal into the optical storage medium. Furthermore, because the reflective surfaces of the rotating mirror rotate as it rotates, the multiple first reflected light signals sequentially generated by the rotating mirror based on the multiple reflective surfaces have different focus positions on the optical storage medium. Therefore, the multiple data corresponding to the modulated light signals corresponding to the multiple first reflected light signals are written to different locations on the optical storage medium.

[0085] According to the above description, Figure 3 In the data reading and writing device shown, the light signal (such as the writing light signal) generated by the light emitting component 301 passes through the modulator 302, the rotating mirror 303 and the read / write optical head 304 and then enters the optical storage medium to write data into the optical storage medium. Therefore, in order to ensure the smooth writing of data, the power of the writing light signal generated by the light emitting component 301 needs to be greater than or equal to the power of the light signal that can change the properties of the optical storage medium. After the light emitting component 301 emits the writing light signal, it can be detected by the power detector ( Figure 3 (not shown) detects the power of the written optical signal. When the detected power is different from the required power, the light-emitting component 301 can adjust the power of the written optical signal so that the power of the written optical signal is greater than or equal to the power of the optical signal that can change the properties of the optical storage medium.

[0086] In summary, in the data reading and writing device provided in the embodiment of the present application, a rotating mirror sequentially reflects multiple modulated light signals modulated by a modulator to obtain multiple first reflected light signals corresponding to the multiple modulated light signals, so that the multiple first reflected light signals are focused to different positions on the optical storage medium by the read / write optical head, thereby writing multiple data corresponding to the multiple modulated light signals on the optical storage medium. Because the data reading and writing device provided in the embodiment of the present application mainly writes data on the optical storage medium through the rotation of the rotating mirror, it can reduce the jitter noise caused by the high-speed rotation of the optical storage medium. Therefore, under the premise of ensuring data writing accuracy, the data writing speed of the data reading and writing device can be improved.

[0087] Furthermore, since the data reading and writing device provided in the embodiment of the present application mainly writes data on the optical storage medium by rotating the rotating mirror, the jitter noise caused by the high-speed rotation of the optical storage medium can be reduced, and therefore the servo difficulty is also relatively low.

[0088] In addition, the data writing speed of the data reading and writing device provided in the embodiment of the present application is related to the rotation speed of the rotating mirror, and the rotation speed of the rotating mirror is often faster, so the data writing speed of the data reading and writing device is faster.

[0089] Figure 4 This is a structural diagram of another data reading and writing device provided in an embodiment of the present application, such as Figure 4 As shown, in Figure 3 On the basis of, the data reading and writing device further includes: a carrier 305, the carrier 305 is used to carry the optical storage medium, and drive the optical storage medium to rotate or translate on a plane perpendicular to the axial direction z of the read-write optical head 304. For example, assuming Figure 4 In the embodiment, direction x and direction y are perpendicular to each other and are both perpendicular to the axial direction z. Then, the planes in which directions x and y lie are perpendicular to the axial direction z. The carrier 305 can drive the optical storage medium to move in directions x and y, respectively. The carrier 305 can be an air-floating platform or other platform capable of driving the optical storage medium to rotate or translate.

[0090] For example, when writing data onto an optical storage medium, the rotating mirror 303 rotates and sequentially generates multiple first reflected light signals of multiple modulated light signals based on the multiple reflective surfaces C of the rotating mirror 303. These multiple first reflected light signals are sequentially focused by the read / write optical head 304 onto the optical storage medium supported on the carrier 305. During this process, the carrier 305 can drive the optical storage medium to translate along a plane perpendicular to the axial direction z, so that the multiple first reflected light signals are respectively focused onto different locations on the optical storage medium, thereby writing data at different locations on the optical storage medium.

[0091] Optionally, when the optical storage medium includes multiple storage layers, the carrier 305 can further move the optical storage medium along the axial direction z. For example, the carrier 305 can first move the optical storage medium along the axial direction z to focus the read / write optical head 304 on a particular storage layer. Subsequently, the carrier 305 can translate or rotate the optical storage medium along a plane perpendicular to the axial direction z, causing the read / write optical head 304 to focus the multiple first reflected light signals onto different locations on the storage layer, thereby writing data to different locations within the storage layer. Subsequently, the carrier 305 can use this method to move the optical storage medium to write data to other storage layers.

[0092] In the process of writing data to an optical storage medium, the data reading and writing device provided in the embodiment of the present application not only rotates the rotating mirror 303, but also drives the optical storage medium to move or rotate the support platform 305, thereby achieving data writing at different locations on the optical storage medium. When the data writing speed is relatively fast, since the data reading and writing device primarily writes data through the rotation of the rotating mirror 303, the requirements for the speed at which the support platform 305 drives the optical storage medium to move or rotate are relatively low. In this case, the jitter noise caused by the movement or rotation of the optical storage medium is relatively small, thereby improving the accuracy of the data reading and writing device in writing data on the optical storage medium.

[0093] According to the above description, it can be seen that during the rotation of the rotating mirror 303 and the movement or rotation of the optical storage medium by the supporting platform 305, the read-write optical head 304 can focus the multiple first reflected light signals generated by the rotating mirror 303 onto the optical storage medium in sequence, so that the multiple first reflected light signals can scan different positions in the optical storage medium in sequence.

[0094] For example, the scanning conditions of the optical storage medium by the multiple first reflected light signals may be as follows:

[0095] During the rotation of the rotating mirror 303, the rotating mirror 303 will sequentially receive multiple modulated light signals, and these modulated light signals are respectively received by multiple reflecting surfaces C, wherein each reflecting surface C will receive at least two modulated light signals. Moreover, since the reflecting surface C is also rotating during the rotation of the rotating mirror 303, the incident angles of the at least two modulated light signals received by each reflecting surface C on the reflecting surface C are different, and the exit angles of the first reflected light signals of these modulated light signals on the reflecting surface C are also different, so the positions of these first reflected light signals on the optical storage medium when they are focused by the read / write optical head 304 are also different. Figure 4 and Figure 5 , when the mirror 303 rotates along the direction B, the reflecting surface C also rotates along the direction B, and the reflecting surface C generates a plurality of first reflected light signals ( Figure 5The four first reflected light signals are taken as an example in the figure and are sequentially focused onto the optical storage medium to form a scanning area D in the optical storage medium.

[0096] During the rotation of the rotating mirror 303, the carrier 305 can drive the optical storage medium to translate on a plane perpendicular to the axis direction z of the read / write optical head 304, so that the first reflected light signals generated by the multiple reflective surfaces C in the rotating mirror 303 sequentially scan the multiple scanning areas D in the optical storage medium, thereby scanning a rectangular area (such as Figure 6 As shown, the rectangular area can also be called a strip) for scanning. For example, assuming that the rotation speed of the rotating mirror 303 is 55000 rpm (revolutions per minute), if the rotating mirror 303 has 18 reflecting surfaces, the scanning speed of the reflected light signal (such as the first reflected light signal or the second reflected light signal) generated by the rotating mirror 303 on the optical storage medium is about 55000 rpm / 60*18=16500 lines / second, where one line represents the length of the scanning area of the optical storage medium generated by a reflecting surface in the rotating mirror. If the width of the scanning area of the optical storage medium generated by a reflecting surface in the rotating mirror is 400 nm, the carrier 305 drives the optical storage medium along Figure 6 The speed of movement in the direction shown may be 16500 lines / second x 400 nm / line = 6.6 mm / second.

[0097] After scanning each rectangular area, Figure 7 As shown, the carrier platform 305 can drive the optical storage medium to translate on the plane, so that the first reflected light signal generated by the rotating mirror 303 can scan other rectangular areas in the optical storage medium.

[0098] It can be seen that the optical storage medium may include multiple rectangular areas arranged in sequence, and the width direction of the rectangular area may be the scanning direction of the first reflected light signal reflected by the reflective surface C on the optical storage medium. During the process of the first reflected light signal scanning the optical storage medium, the scanning area D of the first reflected light signal may be located in any rectangular area, and the length of the scanning area D may be equal to the width of the rectangular area.

[0099] The optical storage medium may have any shape. For example, the cross-section of the optical storage medium (parallel to the extension direction of the storage layer in the optical storage medium) is rectangular, the length of the cross-section is parallel to the width of the rectangular region, and the width of the cross-section is parallel to the length of the rectangular region. The length of the cross-section is greater than the sum of the widths of multiple rectangular regions, and the width of the cross-section is greater than the length of the rectangular region. Alternatively, the cross-section of the optical storage medium is circular, and the diameter of the circle is greater than the length of the rectangular region. For example, when the cross-section of the optical storage medium is rectangular, the length of the rectangle is 300 mm, the width is 300 mm, and the thickness of the optical storage medium is 2 mm, then the width of the rectangular region in the optical storage medium may be 1 mm.

[0100] It should be noted that, in the process of scanning the optical storage medium by the plurality of first reflected light signals, the manner in which the carrier 305 drives the optical storage medium to move or rotate can also be the same as that in the embodiment of FIG. Figure 6 and Figure 7 Different from the method shown in FIG. 1 , the order in which the first reflected light signal scans the optical storage medium can also be the same as that shown in FIG. Figure 5 、 Figure 6 and Figure 7 The scanning order shown is different, and the embodiments of the present application do not limit this.

[0101] Optionally, when the optical storage medium has multiple storage layers, the carrier 305 can drive the optical storage medium to move so that the multiple first reflected light signals sequentially scan the parts of each rectangular area belonging to the multiple storage layers, or so that the multiple first reflected light signals sequentially scan the parts of each storage layer belonging to the multiple rectangular areas.

[0102] Furthermore, the data reading and writing device provided in the embodiment of the present application may not only have the function of writing data on the optical storage medium, but also have the function of reading data stored in the optical storage medium. The data reading function of the data reading and writing device will be explained below.

[0103] For example, Figure 8 This is a schematic diagram of a data reading and writing device reading data provided in an embodiment of the present application. Please refer to Figure 8 The light-emitting component 301 is further configured to generate a read optical signal; this read optical signal may reference the write optical signal, but the power of the read optical signal must be less than the power of the write optical signal. After emitting the read optical signal, the light-emitting component 301 can detect the power of the read optical signal using a power detector within the light-emitting component. If the detected power differs from the required power, the light-emitting component 301 can adjust the power of the read optical signal to ensure that the power of the read optical signal is less than the power of the write optical signal.

[0104] The rotating mirror 303 is further configured to receive the read light signal generated by the light-emitting assembly 301 and, during rotation, sequentially generate multiple second reflected light signals of the read light signal based on the multiple reflective surfaces. The process by which the rotating mirror 303 sequentially generates multiple second reflected light signals can be referred to as the process by which the rotating mirror 303 sequentially generates multiple first reflected light signals, and is not further described in detail in this embodiment of the present application.

[0105] The read / write optical head 304 is further configured to respectively receive a plurality of second reflected light signals generated by the rotating mirror 303 and respectively focus the plurality of second reflected light signals on the optical storage medium to read data stored in the optical storage medium.

[0106] In the data reading and writing device provided in the embodiments of the present application, a rotating mirror reflects the read light signal generated by the light-emitting component to generate multiple second reflected light signals. These multiple second reflected light signals are then focused by the optical read / write head to different positions on the optical storage medium, thereby reading the data stored in the optical storage medium. Because the data reading and writing device provided in the embodiments of the present application primarily reads data from the optical storage medium through the rotation of the rotating mirror, it can reduce jitter noise caused by the high-speed rotation of the optical storage medium. Therefore, while ensuring data reading accuracy, the data reading speed of the data reading and writing device can be improved.

[0107] Furthermore, since the data reading and writing device provided in the embodiment of the present application mainly reads data on the optical storage medium by rotating the rotating mirror, the jitter noise caused by the high-speed rotation of the optical storage medium can be reduced, and therefore the servo difficulty is also relatively low.

[0108] Furthermore, the data reading speed of the data reading and writing device provided in the embodiment of the present application is related to the rotation speed of the rotating mirror. Since the rotation speed of the rotating mirror is often faster, the data reading speed of the data reading and writing device is faster.

[0109] During the process of reading data stored in the optical storage medium, the rotating mirror 303 can rotate, and the supporting platform 305 can also drive the optical storage medium to move, so that the multiple second reflected light signals generated by the rotating mirror 303 scan the optical storage medium. The scanning process can be referred to the scanning process of the optical storage medium by the multiple first reflected light signals generated by the rotating mirror 303, and will not be described in detail in this embodiment of the present application.

[0110] When the data reading / writing device reads data from an optical storage medium, not only does the rotating mirror 303 rotate, but the support platform 305 also drives the optical storage medium to move or rotate, thereby reading data from different locations on the optical storage medium. When reading data at a high speed, since the data reading / writing device primarily reads data through the rotation of the rotating mirror 303, the speed requirement for the movement or rotation of the optical storage medium by the support platform 305 is lower. At this time, the jitter noise caused by the movement or rotation of the optical storage medium is reduced, thereby improving the accuracy of the data reading / writing device in reading data from the optical storage medium.

[0111] For example, assuming that the rotation speed of the rotating mirror 303 is 55,000 rpm (revolutions per minute), if the rotating mirror 303 has 18 reflecting surfaces, the scanning speed of the reflected light signal generated by the rotating mirror 303 (such as the first reflected light signal or the second reflected light signal) on the optical storage medium is approximately 55,000 rpm / 60*18=16,500 lines / second, where one line represents the length of the scanning area of the light signal generated by one reflecting surface in the rotating mirror on the optical storage medium; assuming that each line is 1,000 microns, the scanning rate of the reflected light signal generated by the rotating mirror 303 on the optical storage medium reaches 16.5 m / s (meters / second). Assuming the numerical aperture of the read / write optical head 304 is 0.95, the read / write optical head 304 focuses the reflected light signal generated by the rotating mirror 303 onto the optical storage medium to form a circular recording spot with a diameter of 200 nanometers. Based on the single recording bit size of 200 nanometers (i.e., a 200-nanometer circular recording spot can record one bit of data), the data read / write bandwidth can reach 16.5 m / s ÷ 200 nm / bit (nanometer / bit) = 82.5 Mb / s (megabits / second). This shows that the data read / write device provided by the embodiment of the present application has a relatively fast data read / write speed.

[0112] Please continue to refer to Figure 8 After each second reflected light signal is focused on the optical storage medium, the optical storage medium generates a feedback light signal corresponding to the second reflected light signal based on the second reflected light signal. The feedback light signal carries information about the data stored in the optical storage medium, and the data in the optical storage medium can be retrieved based on the feedback light signal. For example, the feedback light signal can be an optical signal formed after the optical storage medium reflects the second reflected light signal, or the feedback light signal can be a fluorescence signal emitted by the optical storage medium under the stimulation of the second reflected light signal.

[0113] Please refer to Figure 8 and Figure 9 ,exist Figure 4 On the basis of (or Figure 3 On the basis of Figure 8 and Figure 9 China is in Figure 4Taking the example of FIG. 3 , the data reading and writing device further includes: a detector 306 and a selection lens 307. The optical storage medium is used to generate multiple feedback optical signals of multiple second reflected optical signals, wherein each second reflected optical signal corresponds to a feedback optical signal. The above-mentioned read / write optical head 304 is also used to transmit multiple feedback optical signals; the selection lens 307 is used to transmit the modulated optical signal and the read optical signal, and sequentially receive multiple feedback optical signals from the read / write optical head 304, and sequentially reflect the multiple feedback optical signals to the detector 306. The detector 306 is used to sequentially receive the multiple feedback optical signals and obtain the data stored in the optical storage medium based on the feedback optical signals.

[0114] For example, the selection lens 307 can be a wavelength selection lens (such as a dichroic mirror), which can transmit light signals of some wavelengths and reflect light signals of other wavelengths. At this time, the modulated light signal and the read light signal can both be light signals that can be transmitted by the wavelength selection lens, and the feedback light signal can be a light signal that can be reflected by the wavelength selection lens.

[0115] It can be seen that the modulated light signal, the read light signal, and the feedback light signal are distinguished by the selection lens 307, so that the detector 306 can obtain the feedback light signal and then read the data based on the feedback light signal. It should be noted that in the embodiment of the present application, the feedback light signal is taken as an example, after being transmitted from the read / write optical head 304, it is first reflected on the rotating mirror 303, and then reaches the selection lens 307, and then reaches the detector 306. Alternatively, the feedback light signal can also directly reach the selection lens 307 after being transmitted from the read / write optical head 304, without passing through the rotating mirror 303. In this case, the selection lens 307 is used to transmit the modulated light signal and the read light signal between the rotating mirror 303 and the read / write optical head 304.

[0116] Optionally, the data reading and writing device further includes a deflection mirror 308. The deflection mirror 308 is configured to receive a modulated light signal modulated by the modulator 302 and reflect the modulated light signal to the selection lens 307. The deflection mirror 308 is also configured to receive a read light signal generated by the light emitting assembly 301 and reflect the read light signal to the selection lens 307.

[0117] For example, the light emitting assembly 301 includes: a write light emitting unit 3011 for generating a write light signal, and a read light emitting unit 3012 for generating a read light signal. At this time, the deflection mirror 308 can move to a first position (such as 0.00100) in the light emitting direction of the modulator 302 when the write light emitting unit 3011 generates a write light signal. Figure 9The deflection mirror 308 is located in the middle of the optical fiber to receive the multiple modulated optical signals obtained by the modulator 302 modulating the write optical signal. The deflection mirror 308 can also be moved to a second position (such as the position of the deflection mirror 308) in the light emitting direction of the read light emitting unit 3011 when the read light emitting unit 3011 generates a read light signal. Figure 8 The deflection mirror 308 is located in the middle) to receive the reading light signal generated by the reading light unit 3011.

[0118] During the data reading and writing process, the data reading and writing device provided in the embodiment of the present application switches the position of the deflection mirror 308 to reflect both the modulated light signal and the read light signal to the selection lens 307. This eliminates the need to provide separate reflective mirrors in the light emitting directions of the modulator 302 and the read-light unit 3012, thereby simplifying the structure of the data reading and writing device.

[0119] Optionally, when the optical paths of the modulated light signal and the read light signal are different, the deflection mirror 308 in the embodiment of the present application can also be replaced with two reflectors, namely a writing reflector and a reading reflector. The writing reflector is located at a first position in the light-emitting direction of the modulator 302 and is used to reflect the modulated light signal generated by the modulator 302 to the selection lens 307. The reading reflector is located at a second position in the light-emitting direction of the read light unit 3012 and is used to reflect the read light signal emitted by the read light unit 3012 to the selection lens 307. This embodiment of the present application is not limited to this.

[0120] For further information, please refer to Figure 8 and Figure 9 The data reading and writing device may further include a switch 309. Switch 309 may be located between the read light unit 3012 and the second position. When reading data from the optical storage medium, switch 309 is in the open state, allowing the read light signal emitted by the read light unit 3012 to be directed toward the deflection mirror 308 located in the second position. When reading data from the optical storage medium is not required, switch 309 may be in the closed state. Of course, the data reading and writing device may also not include switch 309, and this embodiment of the present application is not limited to this.

[0121] Optionally, the data reading and writing device may further include: a writing lens group 310 and a reading lens group 311. Each lens group in the writing lens group 310 and the reading lens group 311 may include at least one lens ( Figure 8 and Figure 9(In each example, two lenses are used.) The write lens group 310 can be located between the modulator 302 and the first position, and is used to adjust the modulated light signal modulated by the modulator 30113, such as by collimation and beam expansion. The read lens group 311 can be located between the read light unit 3012 and the second position (for example, between the switch 309 and the second position), and is used to adjust the read light signal emitted by the read light unit 3012, such as by collimation and beam expansion.

[0122] Please continue to refer to Figure 8 and Figure 9 The data reading and writing device may further include: an encoder 312 and a decoder 313. The encoder 312 and the decoder 313 may be integrated together or independent of each other, which is not limited in this embodiment of the present application.

[0123] When the data reading / writing device writes data to the optical storage medium, the encoder 312 can encode the multiple data to be written and send the encoded multiple data to the modulator 302, so that the modulator 302 can modulate the write optical signal emitted by the light-emitting component 301 into multiple modulated optical signals based on the encoded multiple data. When the data reading / writing device reads data from the optical storage medium, the detector 306 can obtain the multiple data (encoded data) stored in the optical storage medium based on the multiple feedback optical signals received. The detector 306 can also send the obtained multiple data to the decoder 313, so that the decoder 313 can decode the received data.

[0124] Please continue to refer to Figure 8 and Figure 9 The data read / write device may further include an adjustment component 314. The adjustment component 314 is connected to the optical read / write head 304. The adjustment component 314 can drive the optical read / write head 304 to move in the axial direction of the optical read / write head 304 to adjust the focus position of the optical read / write head 304 on the optical storage medium. For example, the adjustment component 314 can be a piezoelectric actuator (PZT). The optical read / write head 304 can be mounted on the PZT. The PZT can extend and contract to drive the optical read / write head 304 to move in the axial direction.

[0125] Optionally, the operation of at least some components in the data reading and writing device may be completed under the control of the controller. In this case, the data reading and writing device may further include: a controller ( Figure 8 and Figure 9(not shown). The controller can be connected to the aforementioned light-emitting assembly 301, rotating mirror 303, supporting platform 305, deflection mirror 308, switch 309, encoder 312, decoder 313, and adjustment assembly 314. The controller is used to: control the light-emitting assembly 301 to generate write optical signals and read optical signals, send multiple data to be written to the encoder 312, control the rotation of the rotating mirror 303, control the supporting platform 305 to drive the optical storage medium to rotate or translate, control the deflection mirror 308 to switch between the first position and the second position, control the deflection mirror 308 to swing, control the switch 309 to turn on and off, receive data decoded by the decoder 313, and control the adjustment assembly 314 to drive the read / write optical head 304 to move.

[0126] The controller may be any device having the above functions, such as a processor, a field programmable gate array (FPGA), etc. For another example, the controller may be a chip including a programmable logic circuit and / or program instructions, which, when running, is used to implement the method for controlling components other than the controller in the data reading and writing device.

[0127] Of course, at least some of the components including the light-emitting assembly 301, the rotating mirror 303, the supporting platform 305, the deflection mirror 308, the switch 309, the encoder 312, the decoder 313, and the adjustment assembly 314 may operate independently of the controller. In this case, these components may not need to be connected to the controller. If none of these components need to be connected to the controller, the data reading and writing device may not include a controller, and this is not limited in this embodiment of the present application.

[0128] The data reading and writing device provided in the embodiment of the present application can perform servo calibration before reading and writing the optical storage medium, or during the process of reading and writing the optical storage medium.

[0129] For example, when the data reading and writing device includes a controller, the controller can be used to control the swing of the deflection mirror 308 to adjust the focus position of the read-write optical head 304, and / or, the controller can be used to control the read-write optical head 304 (for example, by controlling the read-write optical head 304 through the adjustment component 314) to move along the axial direction to adjust the focus position of the read-write optical head.

[0130] Optionally, the optical storage medium may include marking points, and the data reading and writing device may perform servo calibration based on these marking points. The marking points may be carbonized points pre-marked on the optical storage medium that are capable of reflecting light signals, or pre-marked points pre-marked on the optical storage medium that are capable of emitting fluorescent signals under the action of light signals. Optionally, marking points on the optical storage medium may be performed using the data reading and writing device provided in the embodiments of the present application, although other data reading and writing devices may also be used, and this embodiment of the present application is not limiting in this regard.

[0131] During servo calibration of the data read / write device, the controller can detect whether there is any deviation between the focus of the read / write optical head and the marking point in the axial direction of the read / write optical head, as well as whether there is any deviation between the focus of the read / write optical head and the marking point in a direction perpendicular to the axial direction of the read / write optical head. For example, the controller can execute actions related to reading data from an optical storage medium using a light-emitting assembly, a deflection mirror, a rotating mirror, a support platform, a detector, and a decoder to read data at the marking point on the optical storage medium. The controller can then determine whether there is any deviation between the focus of the read / write optical head and the marking point in the aforementioned two directions based on the data read at the marking point.

[0132] On the one hand, when there is a deviation between the focus and the marking point in the optical storage medium in the axial direction of the read / write optical head, the controller can control the read / write optical head to move in the axial direction to move the focus along the axial direction so that the focus and the marking point are at the same position in the axial direction.

[0133] For example, Figure 10 As shown, when the focus is located in the direction of the marking point toward the read / write optical head in the axial direction z of the read / write optical head, the controller can control the adjustment component to drive the read / write optical head 304 to move along the axial direction z toward the direction close to the supporting platform, so that the focus and the marking point coincide in the axial direction z of the read / write optical head.

[0134] For example, Figure 11 As shown, when the focus is located in the direction of the marking point away from the read / write optical head in the axial direction z of the read / write optical head, the controller can control the adjustment component to drive the read / write optical head 304 to move along the axial direction z in the direction away from the supporting platform, so that the focus and the marking point coincide in the axial direction z of the read / write optical head.

[0135] On the other hand, when there is a deviation between the focus and the marking point in a direction perpendicular to the axial direction of the read / write optical head, the controller can control the deflection mirror to swing so that the focus moves on a plane perpendicular to the axial direction, so that the focus and the marking point are in the same position in the direction perpendicular to the axial direction of the read / write optical head.

[0136] For example, Figure 12As shown, when the light signal reflected on the reflective surface is in the scanning direction (perpendicular to the axial direction of the read / write optical head, such as the x direction) on the optical storage medium, there is a deviation between the focus and the mark point (such as Figure 12 When the center focus is located to the right of the marking point, the controller can control the deflection mirror 308 to swing around the axis L1 perpendicular to the paper surface so that the focus and the marking point coincide in the scanning direction.

[0137] For example, Figure 13 As shown, when there is a deviation between the focus and the mark point in the direction perpendicular to the scanning direction (perpendicular to the axial direction of the read / write optical head, such as the y direction) Figure 13 When the center focus is located behind the marking point, the controller can control the deflection mirror 308 to swing around the axis L2 parallel to the paper surface so that the focus and the marking point coincide in a direction perpendicular to the above-mentioned scanning direction.

[0138] The positions of the marking points in the optical storage medium will be described below.

[0139] like Figure 14 As shown, the optical storage medium includes: a plurality of rectangular areas arranged in sequence (see above for the explanation of the rectangular areas), the width direction of the rectangular areas is the scanning direction of the light signal (such as the first reflected light signal and the second reflected light signal) generated by the rotating mirror 303 in the optical storage medium, and the plurality of rectangular areas are arranged in sequence along the scanning direction. The marking point can be located in the edge area of the rectangular area. For example, the rectangular area includes: a middle area, and two edge areas on both sides of the middle area in the scanning direction, the middle area is used to store data, and the marking point can be located in the edge area, for example, both of the two edge areas can have a marking point. Since the edge area where the marking point in the optical storage medium is located is not an area for storing data, it is possible to avoid setting the marking point in the optical storage medium to affect the reading and writing of data.

[0140] Optionally, both edge regions have marking points, and the marking points of the two edge regions correspond to each other. When the scanning area of the light signal (such as the first reflected light signal and the second reflected light signal) generated by the reflective surface of the rotating mirror on the optical storage medium is located in any rectangular area, the corresponding marking points in the two edge regions are located in the same scanning area (such as Figure 5 、 6 , 7 and Figure 14 As can be seen, when the light signal generated by the reflective surface in the rotating mirror scans a rectangular area in the optical storage medium, the light signals scanning the two corresponding marking points in the two edge areas are generated by the same reflective surface.

[0141] Because the two edge regions of the rectangular area have a one-to-one correspondence of marking points, when the optical signal reflected by each reflective surface of the rotating mirror scans the rectangular area, the reflective surface can scan a set of corresponding marking points, thereby enabling the data read / write device to read / write the optical storage medium while simultaneously performing servo correction based on the scanned set of corresponding marking points. For example, when the optical signal reflected by the rotating mirror of the data read / write device scans the i-th scanning area, the 2i-th scanning area, the 3i-th scanning area, and so on, the data read / write device performs servo correction based on the marking points within each scanning area, where i ≥ 1 and n ≥ 1.

[0142] Optionally, when the optical storage medium includes multiple storage layers (e.g., 50 storage layers, 60 storage layers, etc.), each storage layer may have a marking point. When reading or writing data in each storage layer, the data reading / writing device may perform servo correction based on the marking points on that storage layer. For example, the marking points in each storage layer may be circular marking points with a diameter of 200 nanometers. In each storage layer, multiple marking points in each edge region may be arranged sequentially, and the center distance between adjacent marking points may be 400 nanometers.

[0143] Optionally, there is a deviation in the orthographic projection of the marking points of at least two storage layers in the optical storage medium on a plane perpendicular to the axial direction of the optical read / write head. For example, Figure 15 Shown Figure 14 Schematic diagram of the middle section PP', as shown Figure 15 As shown, the orthographic projections of the marking points of the multiple storage layers on a plane perpendicular to the axial direction of the read / write optical head all have deviations (e.g., they do not overlap). Optionally, within each rectangular region, the marking points of the multiple storage layers in each edge region can be arranged sequentially in a direction close to the middle region. Due to the staggered arrangement of the marking points, when the marking points are points for reflecting light signals (e.g., carbonized points), these marking points do not affect each other, thus preventing the second reflected light signal emitted by the data reading / writing device to a certain marking point from being simultaneously emitted to other marking points, thereby avoiding deviations in the data read from the marking points and improving the accuracy of servo correction based on the marking points.

[0144] Optionally, when the optical storage medium has one-to-one corresponding marking points, during the servo calibration process of the data reading / writing device, the controller may further adjust the rotational speed of the rotating mirror based on the reading time difference between the corresponding marking points in the two edge regions. For example, during the process of the data reading / writing device reading / writing the optical storage medium, the control device may calculate the required rotational speed M2 of the rotating mirror based on the required data reading / writing speed M1, and control the rotating mirror to rotate at the rotational speed M2. At this time, the reading time difference between the corresponding marking points in the two edge regions should be M3. If the data reading / writing device detects that the reading time difference between the two corresponding marking points in the two edge regions is not M3, the controller may adjust the rotational speed M2 of the rotating mirror so that the reading time difference between the two corresponding marking points in the two edge regions is corrected to M3, thereby correcting the data reading / writing speed to M1.

[0145] Optionally, the controller may further detect a data writing speed and a data reading speed, and compare the detected data writing speed with a desired target writing speed, and compare the detected data reading speed with a desired target reading speed. If there is a deviation between the detected data writing speed and the target writing speed, and / or if there is a deviation between the detected data reading speed and the target reading speed, the rotation speed of the rotating mirror is adjusted.

[0146] In the above embodiment, the light emitting component is used to generate one writing light signal and one reading light signal. Optionally, the light emitting component can also generate multiple writing light signals and multiple reading light signals. For example, the light emitting component can generate n writing light signals and n reading light signals, where n>1. For example, when the light emitting component can generate n writing light signals, Figure 8 and Figure 9 The light emitting assembly 301 may also include a writing beam splitter ( Figure 8 and Figure 9 Not shown) and the reading beam splitter ( Figure 8 and Figure 9 The write beam splitter is used to receive a write light signal generated by the write light emitting unit 3011 and split the write light signal into n write light signals. The read beam splitter is used to receive a read light signal generated by the read light emitting unit 3012 and split the read light signal into n read light signals.

[0147] When the light-emitting assembly is capable of generating n write light signals and n read light signals, the data read / write device includes n modulators 302 and n detectors 306. Assume that the data to be written by the data read / write device includes n groups of data. The i-th modulator 302 among the n modulators 302 is configured to receive the i-th write light signal and modulate it based on the i-th group of data to be written, thereby sequentially generating multiple modulated light signals corresponding to the i-th group of data. After receiving the multiple modulated light signals corresponding to the i-th group of data, the rotating mirror 303, while rotating, sequentially generates first reflected light signals of the multiple modulated light signals based on multiple reflective surfaces. These first reflected light signals are then focused onto the optical storage medium by the read / write optical head 304, thereby writing the i-th group of data to the optical storage medium. Because the n write light signals are modulated by the n modulators, the data read / write device can generate a larger number of modulated light signals per unit time, and thus can write a larger amount of data to the optical storage medium per unit time.

[0148] After the light-emitting component 301 generates n read light signals, the rotating mirror 303 receives the n read light signals and, during its rotation, sequentially generates multiple second reflected light signals for each read light signal based on multiple reflective surfaces. These second reflected light signals are then focused onto the optical storage medium by the read / write optical head 304, causing the optical storage medium to generate feedback light signals for these second reflected light signals. The i-th detector 306 among the n detectors 306 is used to receive the feedback light signal of the second reflected light signal of the i-th read light signal and, based on the received feedback light signal, obtain the data on the optical storage medium. Because the feedback light signals of the second reflected light signals of the n read light signals are received by the n detectors 306, the data read / write device can read more locations on the optical storage medium per unit time, and the data read / write device can read more data from the optical storage medium per unit time.

[0149] When the light-emitting assembly generates multiple write light signals and multiple read light signals, each reflective surface of the rotating mirror can generate multiple reflected light signals (such as the first reflected light signal and the second reflected light signal described above). Each reflected light signal generated by each reflective surface of the rotating mirror can have a scanning area on the optical storage medium. The multiple reflected light signals generated by each reflective surface of the rotating mirror can have multiple scanning areas on the optical storage medium, and the multiple scanning areas can be arranged sequentially in a direction perpendicular to the scanning direction.

[0150] As can be seen, when the light-emitting assembly generates multiple write light signals and multiple read light signals, the reflected light signals generated by the mirror scan a larger area on the optical storage medium during the rotation of the mirror. Therefore, the data read / write device scans the optical storage medium more quickly, further improving the data read / write rate. For example, when the light-emitting assembly is configured to emit one write light signal and one read light signal, the data read / write device can achieve a read / write rate of 82.5 Mb / s. When the light-emitting assembly is configured to emit n write light signals and n read light signals, the read / write rate of the data read / write device can be further improved.

[0151] Furthermore, the n beams of writing optical signals and the n beams of reading optical signals are divided into multiple groups of optical signals, wherein each group of optical signals includes at least one beam of optical signal. Figure 16 As shown, each reflection surface C of the transfer mirror 303 in the data reading and writing device may include: multiple reflection areas corresponding one-to-one to the multiple groups of optical signals, and the data reading and writing device includes: multiple reading and writing optical heads 304 corresponding one-to-one to the multiple groups of optical signals. Figure 16 In the example, two reflection areas (reflection areas G1 and G2) corresponding to two groups of optical signals are used, and each group of optical signals includes two optical beams, and the data reading and writing device includes two reading and writing optical heads 304, and, Figure 16 The diagram only shows a partial structural diagram of the data read / write device. In this case, the rotating mirror 303 is used to generate reflected light signals for each group of light signals based on the corresponding reflection areas of each group of light signals on the multiple reflective surfaces during rotation. The read / write optical head 304 is used to receive the reflected light signals for each group of light signals and focus the reflected light signals for each group of light signals onto the optical storage medium.

[0152] It can be seen that when n beams of writing optical signals and n beams of reading optical signals are divided into multiple groups of optical signals, the data reading and writing device includes a rotating mirror 303, and multiple read-write optical heads 304 corresponding to the multiple groups of optical signals. Each reflecting surface in the rotating mirror 303 can be divided into multiple reflection areas corresponding to the multiple groups of optical signals. Each group of optical signals will be emitted to the corresponding reflection area in the reflecting surface, and the reflection area will generate a reflected light signal of the group of optical signals, and emit the reflected light signal of the group of optical signals to the read-write optical head corresponding to the group of optical signals. The read-write optical head will focus the reflected light signal of the group of optical signals on the optical storage medium. Since the data reading and writing device includes multiple read-write optical heads, and the multiple read-write optical heads can respectively focus the reflected light signals of the multiple groups of optical signals on the optical storage medium to read and write the optical storage medium, the efficiency of the data reading and writing device in reading and writing the optical storage medium is improved.

[0153] In the case where n beams of writing optical signals and n beams of reading optical signals are divided into multiple groups of optical signals, such as Figure 17 As shown, the data reading and writing device may include not one rotating mirror 303 but multiple rotating mirrors 303 corresponding to the multiple groups of optical signals. Figure 17 In the example, two rotating mirrors 303 corresponding to two groups of optical signals, each group of optical signals includes two beams of optical signals, and the data reading and writing device includes two reading and writing optical heads 304, and, Figure 17 In this case, each rotating mirror is used to generate a set of reflected light signals corresponding to the rotating mirror based on multiple reflection surfaces during the rotation process.

[0154] It can be seen that when n beams of writing optical signals and n beams of reading optical signals are divided into multiple groups of optical signals, the data reading and writing device includes multiple rotating mirrors 303 corresponding one-to-one to the multiple groups of optical signals, and multiple read-write optical heads 304 corresponding one-to-one to the multiple groups of optical signals. Each group of optical signals will be directed to the corresponding rotating mirror 303, and the rotating mirror 303 will generate a reflected light signal of the group of optical signals, and direct the reflected light signal of the group of optical signals to the read-write optical head corresponding to the group of optical signals. The read-write optical head will focus the reflected light signal of the group of optical signals on the optical storage medium. Since the data reading and writing device includes multiple read-write optical heads, and the multiple read-write optical heads can respectively focus the reflected light signals of the multiple groups of optical signals on the optical storage medium to read and write the optical storage medium, the efficiency of the data reading and writing device in reading and writing the optical storage medium is improved.

[0155] Further, Figure 17 The reflecting surface of each rotating mirror 303 may include one reflecting area or multiple reflecting areas. When the reflecting surface of each rotating mirror includes multiple reflecting areas, a group of optical signals corresponding to the rotating mirror may also be further divided into multiple groups of optical signals corresponding one-to-one to the multiple reflecting areas. This embodiment of the present application does not limit this.

[0156] The optical storage medium in the embodiments of the present application can be a single-sided optical storage medium. In this case, the optical storage medium includes a stacked substrate and a storage portion, wherein the storage portion is used to store data. When the optical storage medium includes multiple storage layers, the multiple storage layers belong to the storage portion. The optical storage medium may also include a protective layer covering the storage portion. When the optical storage medium is placed on a carrier, the substrate and the storage portion are arranged sequentially in a direction away from the carrier.

[0157] The optical storage medium in the embodiments of the present application can also be a double-sided optical storage medium. In this case, the optical storage medium includes: a first storage portion, a substrate, and a second storage portion stacked in sequence. The first storage portion and the second storage portion are used to store data. The optical storage medium may also include a protective layer covering each storage portion. When the optical storage medium is placed on a support platform, the first storage portion, the substrate, and the second storage portion are arranged in sequence away from the support platform. In this case, the support platform is transparent. The data read / write device includes two data read / write modules. The structure and function of each data read / write module can refer to the structure and function of the data read / write device described above and are not described in detail in this embodiment of the present application. These two data read / write modules correspond one-to-one to the two storage portions in the optical storage medium, and each data write module is used to read and write to the corresponding storage portion. If the optical storage medium has marking points, both the first storage portion and the second storage portion can have marking points. The implementation of the marking points in each storage portion can refer to the implementation of the marking points in the previous embodiments and are not described in detail in this embodiment of the present application.

[0158] In summary, in the data reading and writing device provided in the embodiment of the present application, a rotating mirror is used to generate multiple reflected light signals (multiple first reflected light signals or multiple second reflected light signals) based on the light signal generated by the light-emitting component, and the multiple reflected light signals are focused to different positions on the optical storage medium through the read / write optical head, thereby realizing reading and writing data on the optical storage medium. Because the data reading and writing device provided in the embodiment of the present application reads and writes data on the optical storage medium mainly by rotating the rotating mirror, it can reduce the jitter noise caused by the high-speed rotation of the optical storage medium. Therefore, under the premise of ensuring data reading and writing accuracy, the data reading and writing speed of the data reading and writing device can be improved.

[0159] Furthermore, since the data reading and writing device provided in the embodiment of the present application mainly reads and writes data on the optical storage medium by rotating the rotating mirror, the jitter noise caused by the high-speed rotation of the optical storage medium can be reduced, and therefore the servo difficulty is also relatively low.

[0160] Furthermore, the data reading and writing speed of the data reading and writing device provided in the embodiment of the present application is related to the rotation speed of the rotating mirror, and the rotation speed of the rotating mirror is often faster, and the scanning speed of the light generated by the rotating mirror on the optical storage medium is faster. For example, the scanning speed can reach more than 10 meters per second. Therefore, the data reading and writing speed of the data reading and writing device is faster.

[0161] Furthermore, in the process of reading and writing data to an optical storage medium, the data reading and writing device provided in the embodiments of the present application not only rotates the rotating mirror, but also drives the optical storage medium to move or rotate, thereby enabling data to be read and written at different locations on the optical storage medium. When the speed of reading and writing data is relatively fast, since the data reading and writing device primarily writes data through the rotation of the rotating mirror, the requirements for the speed at which the optical storage medium is driven to move or rotate by the carrier are relatively low. In this case, the jitter noise caused by the movement or rotation of the optical storage medium is relatively small, thereby improving the accuracy of the data reading and writing device in reading and writing data on the optical storage medium.

[0162] Because the data reading and writing device provided in the embodiments of the present application has a relatively high data reading and writing speed, the data reading and writing device is applicable to fields requiring high data reading and writing speeds. The data reading and writing device can also read and write data on optical storage media having multiple storage layers. Therefore, the data reading and writing device is applicable to fields requiring high storage capacity, such as emerging technology fields such as blockchain, machine learning, and the Internet of Things.

[0163] Moreover, since the rotation speed of the rotating mirror is fixed during the rotation process and will not repeatedly accelerate or decelerate, the scanning speed of the reflected light signal (such as the first reflected light signal and the second reflected light signal) generated by the rotating mirror on the optical storage medium will not change repeatedly, so that the spacing between multiple positions where the data reading and writing device reads and writes data on the optical storage medium is relatively uniform.

[0164] Based on the data reading and writing device provided in the embodiment of the present application, the embodiment of the present application provides a data reading and writing method, which may include: a data writing stage and a data reading stage. The two stages in the data reading and writing method will be described separately below.

[0165] on the one hand, Figure 18 A flowchart of a data reading and writing method provided in an embodiment of the present application is shown in FIG. Figure 18 As shown, in the data writing phase, the data reading and writing method includes:

[0166] Step 1801: The light-emitting component generates a write optical signal.

[0167] For example, the light emitting assembly may include a writing light emitting unit, which may be used to generate a writing light signal. The writing light signal may be generated by the writing light emitting unit in step 1801. For an introduction to the writing light signal, please refer to the relevant description in the above embodiment.

[0168] Optionally, the light-emitting component is connected to a controller, and in step 1801, the light-emitting component can generate a write optical signal in the controller of the controller.

[0169] Step 1802: The modulator receives the write optical signal and modulates the write optical signal based on a plurality of data to be written, so as to sequentially generate a plurality of modulated optical signals.

[0170] The modulator can sequentially modulate the write optical signal generated by the light-emitting component according to the multiple data to be written, thereby obtaining a modulated optical signal corresponding to each data. The optical signal corresponding to each data carries the information of that data. The process of the modulator modulating the write optical signal according to the data can be found in the relevant description of the above embodiment.

[0171] Optionally, the modulator is connected to an encoder. In step 1802, the modulator can receive the encoded data sent by the encoder and modulate the write optical signal based on the data. Optionally, the encoder can be connected to a controller, and the encoder can obtain the encoded data based on the data to be written provided by the controller.

[0172] The modulated optical signal obtained by the modulator can refer to the introduction of the modulated optical signal in the above embodiment, and will not be described in detail in the embodiment of the present application.

[0173] Step 1803: The deflection mirror receives multiple modulated light signals in sequence and reflects the received modulated light signals to the selection lens.

[0174] It should be noted that before step 1803, the deflection mirror can be moved to the first position in the light-emitting direction of the modulator, so that after the modulator modulates each modulated light signal, the deflection mirror can receive the modulated light signal and reflect the modulated light signal to the selection lens.

[0175] Optionally, the deflection mirror is connected to a controller, and the deflection mirror can be moved to a first position in the light emitting direction of the modulator under the control of the controller.

[0176] Step 1804: Select a lens to transmit multiple modulated optical signals in sequence.

[0177] Step 1805: The rotating mirror sequentially receives a plurality of modulated light signals, and sequentially generates a plurality of first reflected light signals of the plurality of modulated light signals based on a plurality of reflecting surfaces of the rotating mirror during the rotation process.

[0178] Wherein, one modulated light signal corresponds to one first reflected light signal, and the multiple reflecting surfaces are arranged in sequence along their rotation direction.

[0179] Optionally, the rotating mirror may be connected to a controller, and the rotating mirror may rotate under the control of the controller.

[0180] The process of the rotating mirror generating the first reflected light signal of the modulated light signal can be referred to the relevant description in the above embodiment.

[0181] Step 1806: The read / write optical head receives the plurality of first reflected light signals respectively, and focuses the plurality of first reflected light signals respectively on the optical storage medium.

[0182] After receiving each first reflected light signal generated by the rotating mirror, the read / write optical head can focus the first reflected light signal on the optical storage medium to write data into the optical storage medium.

[0183] Step 1807: The carrying platform drives the optical storage medium carried by the carrying platform to rotate or translate on a plane perpendicular to the axial direction of the read / write optical head.

[0184] During the rotation of the mirror, the support platform also drives the optical storage medium to rotate or translate on a plane perpendicular to the axial direction of the read / write optical head, so that the read / write optical head can focus multiple first reflected light signals to multiple positions on the optical storage medium to write data at multiple positions in the optical storage medium.

[0185] Optionally, when the optical storage medium includes multiple storage layers, the carrier platform can also drive the optical storage medium to move in the axial direction of the read-write optical head, so that the read-write optical head can focus multiple first reflected light signals to multiple storage layers to write data in multiple storage layers in the optical storage medium.

[0186] Optionally, the carrying platform may be connected to a controller, and the carrying platform may drive the optical storage medium to rotate or move under the control of the controller.

[0187] Optionally, in the above embodiment, steps 1803 and 1804 may not be performed. Between steps 1802 and 1805, the tilt mirror needs to sequentially receive multiple modulated light signals and reflect the received modulated light signals to the rotating mirror. Between steps 1805 and 1806, the lens needs to sequentially transmit the multiple modulated light signals.

[0188] on the other hand, Figure 19 A flowchart of another data reading and writing method provided in an embodiment of the present application is shown in FIG. Figure 19 As shown, in the data reading phase, the data reading and writing method includes:

[0189] Step 1901: The light-emitting component generates a reading light signal.

[0190] For example, the light emitting assembly may include a read light emitting unit, which may be used to generate a read light signal. The read light signal may be generated by the read light emitting unit in step 1901. For an introduction to the read light signal, please refer to the relevant description in the above embodiment.

[0191] Optionally, the light-emitting component is connected to the controller, and in step 1901, the light-emitting component can generate a reading light signal in the controller of the controller.

[0192] Optionally, the data reading and writing device includes a switch. Before step 1901, the switch needs to be in an on state so that the reading light signal generated by the light-emitting component can be emitted through the switch.

[0193] Step 1902: The deflection mirror receives the read light signal and reflects the read light signal to the selection lens.

[0194] It should be noted that before step 1902, the deflection mirror can be moved to a second position in the light emitting direction of the read light unit, so that after the read light unit sends a read light signal, the deflection mirror can receive the read light signal and reflect the read light signal to the selection lens.

[0195] Optionally, the deflection mirror is connected to the controller, and the deflection mirror can be moved to a second position in the light emitting direction of the read light unit under the control of the controller.

[0196] Step 1903: Select a lens to transmit and read the optical signal.

[0197] Step 1904: The rotating mirror receives the read light signal and sequentially generates a plurality of second reflected light signals of the read light signal based on a plurality of reflective surfaces during the rotation process.

[0198] Optionally, the rotating mirror may be connected to a controller, and the rotating mirror may rotate under the control of the controller.

[0199] The process of the rotating mirror generating the second reflected light signal may refer to the relevant description in the above embodiment.

[0200] Step 1905: The read / write optical head receives the plurality of second reflected light signals respectively, and focuses the plurality of second reflected light signals respectively on the optical storage medium.

[0201] Step 1906: The carrier platform drives the optical storage medium carried by the carrier platform to rotate or translate on a plane perpendicular to the axial direction of the read / write optical head.

[0202] During the rotation of the mirror, the support platform also drives the optical storage medium to rotate or translate on a plane perpendicular to the axial direction of the read / write optical head, so that the read / write optical head can focus multiple second reflected light signals to multiple positions on the optical storage medium to read data at multiple positions in the optical storage medium.

[0203] Optionally, when the optical storage medium includes multiple storage layers, the carrier platform can also drive the optical storage medium to move in the axial direction of the read / write optical head, so that the read / write optical head can focus multiple second reflected light signals to multiple storage layers to read data in the multiple storage layers in the optical storage medium.

[0204] Optionally, the carrying platform may be connected to a controller, and the carrying platform may drive the optical storage medium to rotate or move under the control of the controller.

[0205] Step 1907: The read / write optical head transmits multiple feedback optical signals generated by the optical storage medium.

[0206] The feedback optical signal is an optical signal generated after the optical storage medium receives the second reflected optical signal, and one feedback optical signal corresponds to one second reflected optical signal.

[0207] The feedback light signal carries information about data stored in the optical storage medium, and the data in the optical storage medium can be retrieved based on the feedback light signal. The feedback light signal can be an optical signal formed after the optical storage medium reflects the second reflected light signal, or the feedback light signal can be a fluorescent signal emitted by the optical storage medium under the stimulation of the second reflected light signal.

[0208] Step 1908: The rotating mirror receives multiple feedback light signals in sequence, and reflects the multiple feedback light signals to the selected lens based on multiple reflection surfaces during the rotation process.

[0209] Step 1909: Select a lens to sequentially receive the multiple feedback light signals, and sequentially reflect the multiple feedback light signals to the detector.

[0210] Step 1910: The detector receives multiple feedback optical signals in sequence, and obtains data stored in the optical storage medium according to the feedback optical signals.

[0211] Since the feedback light signal carries information about the data stored in the optical storage medium, the detector can analyze the feedback light signal to obtain the data stored in the optical storage medium.

[0212] The data obtained by the detector may be coded data. After obtaining the coded data, the detector may also send the coded data to a decoder so that the decoder can decode the coded data. Optionally, the decoder may be connected to a controller, and the decoder may send the decoded data to the controller.

[0213] Optionally, in the above embodiment, the feedback light signal, after passing through the read / write optical head, is first reflected by the rotating mirror, then reaches the selection lens, and finally reaches the detector. Alternatively, the feedback light signal may directly reach the selection lens after passing through the read / write optical head, without passing through the rotating mirror. In this case, the selection lens is used to transmit the modulated light signal and the read light signal between the rotating mirror and the read / write optical head. Steps 1902, 1903, and 1908 may not be performed. Between steps 1901 and 1904, the deflection mirror is required to receive the read light signal and reflect it to the rotating mirror. Between steps 1904 and 1905, the selection lens is required to transmit multiple second reflected light signals.

[0214] Furthermore, the data reading and writing device provided in the embodiment of the present application also includes a controller, and the data reading and writing method may also include: the controller controls the deflection mirror to swing to adjust the position of the focus of the read / write optical head, and / or the controller controls the read / write optical head to move in the axial direction to adjust the position of the focus of the read / write optical head. For example, when there is a deviation between the focus and the marking point in the optical storage medium in the axial direction of the read / write optical head, the controller controls the read / write optical head to move in the axial direction so that the focus moves in the axial direction. When there is a deviation between the focus and the marking point in the direction perpendicular to the axial direction, the controller controls the deflection mirror to swing so that the focus moves on a plane perpendicular to the axial direction.

[0215] The data reading and writing method may further include: the controller adjusting the rotation speed of the rotating mirror according to the reading time difference of the data of the corresponding marking points in the two edge areas of each rectangular area of the optical storage medium.

[0216] Optionally, the data reading and writing method may further include: a controller detecting a data writing speed and a data reading speed, and comparing the detected data writing speed with a desired target writing speed, and comparing the detected data reading speed with a desired target reading speed. If there is a deviation between the detected data writing speed and the target writing speed, and / or if there is a deviation between the detected data reading speed and the target reading speed, the controller adjusts the rotation speed of the rotating mirror.

[0217] It should be noted that the data reading and writing method embodiments provided in this application can be referenced in conjunction with the data reading and writing device embodiments, and the present application embodiments do not limit this. The order of the steps in the data reading and writing method embodiments provided in this application embodiments can be appropriately adjusted, and the steps can also be increased or decreased accordingly according to the circumstances. Any method that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application, and therefore will not be described in detail.

[0218] The embodiment of the present application further provides an optical storage medium having marking points. The explanation of the optical storage medium and the marking points therein can be found in the above embodiment, and the embodiment of the present application will not be repeated here.

[0219] In the present disclosure, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. The term "plurality" refers to two or more, unless otherwise clearly defined.

[0220] In this application, the term "and / or" simply describes an association between related objects, indicating that three possible relationships exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0221] In the drawings, the dimensions of some or all of the structures may be exaggerated for clarity of illustration.

[0222] The above description is merely an optional embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A data reading and writing device, characterized in that: include: A light emitting component, used for generating n beams of writing light signals, where n>1; n modulators, the i-th modulator is used to receive the i-th writing optical signal and modulate the i-th writing optical signal based on the i-th group of data in the n groups of data to be written, so as to sequentially generate a plurality of modulated optical signals, 1≤i≤n; a rotating mirror, comprising a plurality of reflective surfaces sequentially arranged along a rotation direction thereof, for sequentially receiving the plurality of modulated light signals and sequentially generating a plurality of first reflected light signals of the plurality of modulated light signals based on the plurality of reflective surfaces during the rotation process, wherein one modulated light signal corresponds to one first reflected light signal; The read / write optical head is used to respectively receive the multiple first reflected light signals and respectively focus the multiple first reflected light signals on the optical storage medium to write the n groups of data into the optical storage medium.

2. The data reading and writing device according to claim 1, wherein: Also includes: A carrying platform, used for carrying the optical storage medium; The supporting platform is further used to drive the optical storage medium to rotate or translate on a plane perpendicular to the axial direction of the read / write optical head.

3. The data reading and writing device according to claim 1 or 2, characterized in that: The light emitting component is further used to generate a reading light signal; The rotating mirror is further configured to receive the read light signal and sequentially generate a plurality of second reflected light signals of the read light signal based on the plurality of reflective surfaces during the rotation process; The read / write optical head is used to respectively receive the multiple second reflected light signals and respectively focus the multiple second reflected light signals on the optical storage medium to read the data stored in the optical storage medium.

4. The data reading and writing device according to claim 3, wherein: the optical storage medium is configured to generate a plurality of feedback optical signals of the plurality of second reflected optical signals, wherein each of the second reflected optical signals corresponds to a feedback optical signal; The data reading and writing device further comprises: a selection lens and a detector; The read / write optical head is further used to transmit the multiple feedback optical signals; The selection lens is configured to transmit the modulated light signal and the read light signal, sequentially receive the plurality of feedback light signals, and sequentially reflect the plurality of feedback light signals to the detector; The detector is used to receive the multiple feedback optical signals in sequence and obtain the data stored in the optical storage medium according to the received feedback optical signals.

5. The data reading and writing device according to claim 4, characterized in that: The rotating mirror is further configured to sequentially receive a plurality of feedback light signals and reflect the plurality of feedback light signals toward the selection lens based on the plurality of reflection surfaces during the rotation process.

6. The data reading and writing device according to claim 4 or 5, characterized in that: The light emitting component is used to generate n beams of reading light signals; The data reading and writing device includes: n detectors, wherein the i-th detector is used to receive a feedback light signal of the second reflected light signal of the i-th reading light signal.

7. The data reading and writing device according to claim 6, characterized in that: The n beams of writing optical signals and the n beams of reading optical signals are divided into a plurality of groups of optical signals, each group of optical signals includes at least one beam of optical signal; The reflective surface includes: a plurality of reflective areas corresponding one-to-one to the plurality of groups of optical signals; the data reading and writing device includes: a plurality of the read-write optical heads corresponding one-to-one to the plurality of groups of optical signals; The rotating mirror is configured to generate a reflected light signal of each group of light signals based on the reflection areas corresponding to each group of light signals on the multiple reflection surfaces during the rotation process; The read / write optical head is used to respectively receive the reflected light signals of each corresponding group of optical signals and respectively focus the reflected light signals of each corresponding group of optical signals on the optical storage medium.

8. The data reading and writing device according to claim 6, characterized in that: The n beams of writing optical signals and the n beams of reading optical signals are divided into a plurality of groups of optical signals, each group of optical signals includes at least one beam of optical signal; the data reading and writing device includes: a plurality of the rotating mirrors corresponding one-to-one to the plurality of groups of optical signals, and a plurality of the reading and writing optical heads corresponding one-to-one to the plurality of groups of optical signals; The rotating mirror is configured to generate a reflected light signal of a group of light signals corresponding to the rotating mirror based on the multiple reflecting surfaces during the rotation process; The read / write optical head is used to respectively receive the reflected light signals of a corresponding group of optical signals and respectively focus the reflected light signals of the corresponding group of optical signals on the optical storage medium.

9. The data reading and writing device according to claim 3, wherein: Also includes: The deflection mirror is used to receive the modulated light signal and the read light signal, and reflect the modulated light signal and the read light signal to the rotating mirror.

10. The data reading and writing device according to claim 9, characterized in that: Also includes: The controller is used to control the deflection mirror to swing so as to adjust the focus position of the read / write optical head, and / or control the read / write optical head to move in the axial direction so as to adjust the focus position of the read / write optical head.

11. The data reading and writing device according to claim 10, characterized in that: The controller is used to: When there is a deviation between the focus and the marking point in the optical storage medium in a direction perpendicular to the axial direction, controlling the deflection mirror to swing so that the focus moves on a plane perpendicular to the axial direction; When there is a deviation between the focus and a marking point in the optical storage medium in the axial direction of the optical read / write head, the optical read / write head is controlled to move along the axial direction so that the focus moves along the axial direction.

12. The data reading and writing device according to claim 11, characterized in that: The optical storage medium includes: a plurality of storage layers, each of the storage layers has the marking points, and there is a deviation in the orthographic projections of the marking points in at least two of the storage layers on a plane perpendicular to the axial direction.

13. The data reading and writing device according to claim 11 or 12, characterized in that: The optical storage medium includes: a plurality of rectangular areas; The width direction of the rectangular area is the scanning direction of the light signal generated by the reflective surface in the optical storage medium, and the plurality of rectangular areas are arranged in sequence along the scanning direction; The marking point is located in an edge area of the rectangular area.

14. The data reading and writing device according to claim 13, wherein: The rectangular area includes: a middle area, and two edge areas located on both sides of the middle area in the scanning direction; The marking points of the two edge areas correspond to each other one by one. When the scanning area of the light signal generated by the reflecting surface in the optical storage medium is within the rectangular area, the corresponding marking points in the two edge areas are located in the same scanning area.

15. The data reading and writing device according to claim 14, characterized in that: The controller is further configured to adjust the rotation speed of the rotating mirror according to a time difference between reading data of corresponding marking points in the two edge areas.

16. A data reading and writing method, characterized in that: include: The light emitting component generates n beams of writing light signals, where n>1; The i-th modulator among the n modulators receives the i-th writing optical signal and modulates the i-th writing optical signal based on the i-th group of data among the n groups of data to be written, so as to sequentially generate a plurality of modulated optical signals, 1≤i≤n; The rotating mirror sequentially receives the multiple modulated light signals and sequentially generates multiple first reflected light signals of the multiple modulated light signals based on the multiple reflecting surfaces of the rotating mirror during the rotation process, wherein one modulated light signal corresponds to one first reflected light signal, and the multiple reflecting surfaces are sequentially arranged along the rotation direction of the rotating mirror; The read / write optical head receives the plurality of first reflected light signals respectively, and focuses the plurality of first reflected light signals on an optical storage medium respectively, so as to write the n groups of data into the optical storage medium.

17. The method according to claim 16, characterized in that Also includes: The light emitting component generates a reading light signal; The rotating mirror receives the read light signal and sequentially generates a plurality of second reflected light signals of the read light signal based on the plurality of reflection surfaces during the rotation process; The read / write optical head receives the plurality of second reflected light signals respectively, and focuses the plurality of second reflected light signals on an optical storage medium respectively, so as to read data stored in the optical storage medium.

18. A data reading and writing system, characterized in that: include: An optical storage medium, and a data reading and writing device according to any one of claims 1 to 15.

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