Optical head two-dimensional alternate translation multi-point parallel data recording and reading system

Abstract

The application discloses a two-dimensional alternate translation multi-point parallel data recording and reading system of an optical head. The optical head and a storage medium are oppositely arranged. The storage medium has a boundary area, a plurality of recording areas and an inter-track area. The recording area is rectangular. The optical head is two-dimensionally translated along the horizontal and vertical directions of the recording area. Meanwhile, the optical head sequentially records or reads data recording point arrays in a data signal area according to frames. The data signal area is continuously arranged along the horizontal direction on the recording area. A plurality of data recording point data can be recorded or read at a time, so that the reading and writing speed is effectively improved. In particular, the plurality of recording areas and the inter-track area can be divided into at least two areas. One optical head is arranged in each area. The optical heads are alternately moved and read and written at different times. The data is continuously recorded or read, so that the reading and writing speed is further improved. Since the current frame data recording point array is inserted into the gap of the previous frame data recording point array from the second recording, the storage density is improved while the reading and writing speed is improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of optical storage technology, and particularly relates to a two-dimensional alternately translating multi-point parallel data recording and reading system of an optical head. BACKGROUND

[0002] A conventional optical storage device has an optical head and a storage medium arranged oppositely, and the storage medium is an optical disc having a boundary area, a continuous spiral information track (channel) and an inter-track area. During the writing or reading process of the optical head, the objective lens is driven to move according to the focus and tracking error signals: the focus movement can make the objective lens move up and down along the optical disc in a direction perpendicular to the optical disc, and the tracking movement is to control the optical head (objective lens) to move along the radial direction of the optical disc in a direction parallel to the optical disc, so as to ensure that the focused light spot of the laser beam emitted by the LD module of the optical head accurately falls on the channel of the optical disc, and the reflected laser of the optical disc is received by the PDIC to realize the identification and collection of the optical signal of the signal point on the channel of the optical disc. However, a linear single-point continuous reading and writing mode is adopted, that is, only one signal point (Pit and Land) can be identified and read and written per frame, and the reading and writing rate is low. Even if two optical heads are arranged on the front and back surfaces of the optical disc, the front and back surfaces of the optical disc are still read and written independently, and the problem of low reading and writing rate is still not solved. For example, the average reading rate of a single optical drive in an optical storage product using a 500GB optical disc is about 90MB / S, and the average writing rate is about 62.5MB / S. SUMMARY

[0003] The present application is to solve the above problems existing in the prior art, and provides a two-dimensional alternately translating multi-point parallel data recording and reading system of an optical head.

[0004] The technical solution of the present application is as follows: a two-dimensional alternately translating multi-point parallel data recording and reading system of an optical head, which has an optical head and a storage medium arranged oppositely, and the storage medium has a boundary area, a plurality of recording areas and an inter-track area. The recording area is rectangular, the optical head is two-dimensionally translated along the horizontal and vertical directions of the recording area, and simultaneously records or reads a data signal point array in the data signal area in sequence according to frames. The data signal area is arranged continuously along the horizontal direction on the recording area.

[0005] The plurality of recording areas and the inter-track area are divided into at least two regions, and one optical head is arranged in each region. The optical heads are alternately moved and read and written at different times, and the data is continuously recorded or read.

[0006] The data signal point array is a plurality of recording point arrays completed by multiple recordings. From the second recording, the current frame data recording point array is inserted into the gap of the previous frame data recording point array.

[0007] The storage medium recording area of the present application is rectangular, and has oppositely arranged optical heads and storage medium. The storage medium has a boundary area, a plurality of recording areas and an inter-track area. The recording area is rectangular, and the optical head is two-dimensionally translated along the recording area in the horizontal and vertical directions. The data recording dot array is recorded or read in the data signal area in turn by frame. The data signal area is arranged in series in the horizontal direction on the recording area, and a plurality of data recording dots can be recorded or read at a time, thereby effectively improving the read-write speed. In particular, the plurality of recording areas and the inter-track area can be divided into at least two regions, and one optical head is arranged in each region. The optical heads are alternately moved and read-write in time, and the data is continuously recorded or read, thereby further improving the read-write speed. The present application can insert the current frame data recording dot array into the gap of the previous frame data recording dot array from the second recording, thereby improving the storage density while improving the read-write speed. BRIEF DESCRIPTION OF DRAWINGS

[0008] Figure 1 is a structural schematic diagram of an embodiment of the present application.

[0009] Figure 2 is a structural schematic diagram of a storage medium of an embodiment of the present application.

[0010] Figure 3 is a schematic diagram of the relative movement of the optical head and the storage medium in embodiment 1 of the present application.

[0011] Figure 4 is a schematic diagram of the relative movement of the optical head and the storage medium in embodiment 2 of the present application.

[0012] Figure 5 is a schematic diagram of the data recording dot array 7 in the data signal area 6 in embodiment 1 of the present application.

[0013] Figure 6 is a schematic diagram of the data recording dot array 7 in the data signal area 6 in embodiment 2 of the present application. DETAILED DESCRIPTION

[0014] Embodiment 1:

[0015] The data recording and reading system of the present application is a two-dimensionally alternately translated multi-point parallel data recording and reading system as shown in Figure 1 、 2, 3, 5, and the prior art is the same as the optical head 1 and the storage medium 2 are relatively arranged, the storage medium 2 is composed of a substrate, a recording layer and a protective layer, the recording layer is a photosensitive material, and has a boundary area 3, a plurality of recording areas 4 and an inter-track area 5 thereon, and the system is enclosed in a housing 8, and the difference between the prior art and the embodiment 1 of the application is that the optical head 1 is two, which are No. 1 optical head and No. 2 optical head, and are fixed on a five-axis high-precision displacement platform 9 with the objective lens facing the storage medium 2, the displacement platform is controlled by a servo control unit 10, and can realize control in five directions of X axis, Y axis, Z axis, Tilt left and right inclination and Tilt depth inclination, to ensure that the optical head focal plane is consistent with the recording layer of the storage medium 2. The storage medium 2 is fixed on a two-axis X-Y displacement platform 11, which can realize displacement control or in-out action of the storage medium 2 on the plane. The recording area 4 is rectangular, and the inter-track area 5 is an isolation band parallel to the recording area 4; the optical head 1 moves along the transverse direction of the recording area 4, and records or reads the data recording point array 7 in the data signal area 6 in turn according to the frame, and the data signal area 6 is arranged continuously along the transverse direction on the recording area 4. That is, one data signal area 6 is one frame of picture, and the data recording point array 7 recorded or read simultaneously has HxV recording points, each recording point has a size of Φa, and the spacing between the recording points is l1, l2, and the data signal area 6 formed is arranged continuously on the recording area 4. When recording, the frame data is first encoded by an encoder, and the data information of each recording point is configured, and then the optical head 1 realizes one-time insertion of the data of the whole frame of recording points on the storage medium 2 by photosensitive method; when reading, the optical head 1 obtains the image of the frame data, and according to the light signals of each recording point, the frame of storage data is obtained after decoding by the encoder.

[0016] The optical head 1 records a plurality of continuous data signal areas 6 on each recording area 4, as shown in Figure 2A1, B1, C1, D1, E1, F1, G1, H1; A2, B2, C2, D2, E2, F2, G2, H2; A3, B3, C3, D3, E3, F3, G3, H3;... Am, Bm, Cm, Dm, Em, Fm, Gm, Hm; Am+1, Bm+1, Cm+1, Dm+1, Em+1, Fm+1, Gm+1, Hm+1; Am+2, Bm+2, Cm+2, Dm+2, Em+2, Fm+2, Gm+2, Hm+2;... Preferably, the plurality of record areas 4 and inter-track areas 5 on the storage medium 2 are divided into at least two regions, and the record areas 4 and inter-track areas 5 in each region are continuously and correspondingly provided with an optical head 1. The plurality of optical heads 1 are alternately moved and read and written in time division, so as to realize uninterrupted recording or reading of multi-point data record points. The A1, B1, C1, D1, E1, F1, G1, H1; A2, B2, C2, D2, E2, F2, G2, H2; A3, B3, C3, D3, E3, F3, G3, H3;... on the storage medium 2 correspond to the No. 1 optical head 1, and the Am, Bm, Cm, Dm, Em, Fm, Gm, Hm; Am+1, Bm+1, Cm+1, Dm+1, Em+1, Fm+1, Gm+1, Hm+1; Am+2, Bm+2, Cm+2, Dm+2, Em+2, Fm+2, Gm+2, Hm+2;... correspond to the No. 2 optical head 1.

[0017] The working process is as follows:

[0018] The servo control of the Z axis, tilt left and right inclination, and tilt depth inclination on the five-axis high-precision displacement platform is used for focusing the optical signal of the optical head 1 on the storage medium. The tracking is as follows: Figure 3 As shown in the figure, the two optical heads 1 only reciprocate in the X-axis horizontal direction, and at the same time, the storage medium 2 reciprocates in the Y-axis vertical direction, so as to realize the lateral and longitudinal movement of the optical head 1 along the record area 4, and each frame of data is a data record point array 7 recorded or read in a data signal area 6.

[0019] When recording or reading, the first optical head and the second optical head move to the respective data signal areas Al, Am simultaneously, the first optical head records or reads the data of Al, and the second optical head waits for recording or reading the data of Am, when the data of Al is recorded or read completely, the second optical head starts recording or reading the data of Am, and at the same time, the first optical head moves to Bl to wait for recording or reading the data, when the data of Am is recorded or read completely, the first optical head starts recording or reading the data of Bl, and at the same time, the second optical head moves to Bm to wait for recording or reading the data, the two optical heads move alternately in this way, and record or read the data in turns uninterruptedly until the data of the medium is recorded or read completely. The recording or reading path of the first optical head is: Al→Bl→Cl→Dl→El→Fl→Gl→Hl→H2→G2→F2→E2→D2→C2→B2→A2, A3→B3→C3→D3→E3→F3→G3→H3→···; the recording or reading path of the second optical head is: Am→Bm→Cm→Dm→Em→Fm→Gm→Hm→Hm+1→Gm+1→Fm+1→Em+1→Dm+1→Cm+1→Bm+1→Am+1→Am+2→Bm+2→Cm+2→Dm+2→Em+2→Fm+2→Gm+2→Hm+2→···.

[0020] Example 2

[0021] The two-dimensional alternate translation multi-point parallel data recording and reading system of the optical head of the present application is shown in Figure 1 、 2 , 4, 5, 6, and the structure and working process are basically the same as those of Example 1, the tracking is shown in Figure 4 , the two optical heads 1 move in two dimensions along the lateral and longitudinal directions of the recording area 4, i.e. linear motion according to the S-shaped track, and the storage medium 2 is fixed during the recording or reading process. The two optical heads move alternately in this way, and record or read the data in turns uninterruptedly until the data of the medium is recorded or read completely. The recording or reading path of the first optical head is: Al→Bl→Cl→Dl→El→Fl→Gl→Hl→H2→G2→F2→E2→D2→C2→B2→A2, A3→B3→C3→D3→E3→F3→G3→H3→···; the recording or reading path of the second optical head is: Am→Bm→Cm→Dm→Em→Fm→Gm→Hm→Hm+1→Gm+1→Fm+1→Em+1→Dm+1→Cm+1→Bm+1→Am+1→Am+2→Bm+2→Cm+2→Dm+2→Em+2→Fm+2→Gm+2→Hm+2→···.

[0022] Another difference from the embodiment 1 is that the data recording dot array 7 is a plurality of recording dot arrays completed by a plurality of recording, and from the second recording, the data recording dot array of the current frame is inserted in the gap of the data recording dot array of the previous frame. That is, the insertion recording or reading of the data of the next frame is performed using the gap of the previous recording dot array.

[0023] The first recording is as shown in Figure 5 The recording data recording dot array 7 has H x V recording dots, each recording dot has a size of Φa, and the interval between the recording dots is l1, l2. A recording dot can be inserted between each recording dot, n1-1 recording dots (n1-1 = l1 / Φa≥1) can be inserted between two horizontal recording dots, and n2 recording dots (n2-1 = l2 / Φa≥1) can be inserted between two vertical recording dots.

[0024] The data recording dot array 7 in the data signal area 6 is as shown in Figure 6 The circular a is the recording dot of the first frame, the circular b, c, the triangle a, b, c, the square a, b, c, the pentagon a, b, c, and the cross a, b, c are the inserted recording dots of the frame.

[0025] The recording or reading mechanism of the optical head 1 in one data area 6 is as follows:

[0026] ① The optical head 1 records or reads all the data of the circular a recording dot;

[0027] ② The optical head 1 simultaneously records or reads all the data of the inserted recording dot circular b;

[0028] ③ The optical head 1 simultaneously records or reads all the data of the inserted recording dot circular c;

[0029] ④ The optical head 1 simultaneously records or reads all the data of the inserted recording dot triangle a;

[0030] ⑤ The optical head 1 simultaneously records or reads all the data of the inserted recording dot triangle b;

[0031] ⑥ The optical head 1 simultaneously records or reads all the data of the inserted recording dot triangle c;

[0032] ⑦ The optical head 1 simultaneously records or reads all the data of the inserted recording dot square a;

[0033] ⑧ The optical head 1 simultaneously records or reads all the data of the inserted recording dot square b;

[0034] ⑨ The optical head 1 simultaneously records or reads all the data of the inserted recording dot square c;

[0035] 10. The optical pickup 1 simultaneously records or reads all the data of the inserted recording point pentagon a;

[0036] …

[0037] Until the recording or reading of all the data of the recording point in the data signal area 6 is completed, the multiple optical pickups are alternately moved and read and written in time, i.e. two-dimensional translation multiple point parallel alternate insertion recording and reading are realized.

Claims

1. A two-dimensional, alternative translation, multi-point, parallel data recording and reading system of an optical head, having oppositely arranged optical head (1) and storage medium (2), the storage medium (2) having a boundary area (3), a plurality of recording areas (4) and an inter-track area (5), characterized in that: The recording area (4) is rectangular, the optical head (1) is two-dimensionally translated along the recording area (4) in the lateral and longitudinal directions, and data recording dot arrays (7) are recorded or read in the data signal area (6) in turn by frame, the data signal area (6) is arranged continuously in the lateral direction on the recording area (4); the multiple recording areas (4) and the inter-track area (5) are divided into at least two regions, and one optical head (1) is arranged in each region, and the optical heads (1) are alternately moved and read and written in time division, and data is continuously recorded or read.

2. The optical head two-dimensional alternate translation multi-point parallel data recording and reading system according to claim 1, characterized in that: The data recording dot arrays (7) are multiple recording dot arrays completed by multiple recording, and from the second recording, the current frame data recording dot array is inserted into the gap of the previous frame data recording dot array.

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