JP2000123364A - Structure of optical disk for recording and reproducing and its constitution - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase surface area by forming projected parts or polygonal pyramids in which one side of a triangle of a triangle pole is a bottom surface in a rotation proceeding direction in a dish recording surface truck of an optical disk, arranging recording/reproducing irradiation devices facing to respective outer wall surfaces and forming a plane to a three dimensional structure and to increase storage capacity by the plural recording/reproducing irradiation devices. SOLUTION: In a recording/reproducing region 2, a bit 3 of the optical disk form the projected parts 4 or the polygonal pyramids or cones in which the one side of the triangle of the triangle pole having a continuous base is the bottom surface, the recording/reproducing irradiation devices 1a, 1b facing to respective outer wall surfaces and having optical axes orthogonal to the respective outer wall surfaces are arranged to execute writing and reading. Thereby recording capacity of the recording/reproducing region can be increased by square times of number of the outer wall surfaces when number of the outer wall surfaces and number of the recording/reproducing irradiation devices are made to be equal. Further, a conventional disk can be reproduced too by arranging the recording/reproducing irradiation devices so that an intersection point of the optical axes thereof is in contact with a conventional planar truck recording surface to reflect light and to receive the light with the recording/reproducing irradiation devices facing to each other.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disk apparatus and an optical disk for recording and reproducing the same, and more particularly, to forming a projection, a polygonal pyramid, or a cone on a one-bit surface in a track, with one side of a triangular prism as a bottom, and forming an optical disk. Shafts on each outer wall
By arranging perpendicular recording / reproducing irradiation devices,
A CD-ROM in which a plurality of recording / reproducing irradiators are arranged, and a recording / reproducing irradiating device is used to record / reproduce data whose capacity is twice the number
And the like.

[0002]

2. Description of the Related Art Conventionally, in an optical disk such as a CD-ROM, one recording / reproducing irradiation device is provided on one disk surface for recording / reproducing. To increase the recording capacity, a method of reducing bits and increasing the density is adopted. I was

FIG. 1 is a diagram showing a configuration of a conventional optical disk. In FIG. 1, (2) is a recording film,
(3) shows one bit of recording. The recording / reproducing irradiation device of (1) melts the recording layer, records the bit by surface tension, scans with a laser beam, and uses a photodetector to detect the presence or absence of the bit as an electric signal. Reading is performed by conversion. The above-mentioned conventional method has a problem that the storage capacity cannot be increased unless the diameter of the optical disk surface is increased or the recording density is changed.

The reason is that the position of a pit (recording hole) cannot be changed in order to maintain compatibility with a conventional recording medium.

Incidentally, Japanese Patent Application Laid-Open No. 10-162432,
An optical disc that doubles the recording capacity while maintaining compatibility with the conventional method in terms of recording density and medium by writing 2 bits of information in a pit (recording hole) that has recorded bits (bits) of information. And optical disk devices,

As a multiplex recording method for writing a plurality of signals, Japanese Patent Application Laid-Open No. 2-31329 discloses that an intermediate state between a crystalline state and an amorphous state is provided by modulating the power of a laser beam to be irradiated. A method and an apparatus for writing a plurality of pieces of information on a laser beam irradiation portion to perform multiplex recording have been proposed.

[0007]

SUMMARY OF THE INVENTION The above-mentioned conventional system
This is a method to increase storage capacity while maintaining compatibility, as shown below. Conventional 1 bit (bit)
The triangular prism with one bit (recording hole) that records the minute information as the base (Fig. 2) forms one side of the triangular prism as the base, a convex part or a square pyramid or cone (Fig. 3), and the optical axis is By recording and reproducing by a plurality of recording / reproducing irradiators orthogonal to each outer wall surface, the optical axis intersection intersects with the conventional recording 1-bit surface, and it is reflected and received by the opposing recording / reproducing irradiating device and recognized. While recognizing conventional discs and maintaining compatibility with the conventional method in terms of recording density media, the same number of recording / reproducing irradiation devices as the number of convex outer wall surfaces is used, and the recording capacity is twice the number of recording / reproducing irradiation devices.
An object of the present invention is to provide an optical disk and an optical disk configuration that increase.

[0008]

In order to achieve the above object, an optical disk according to the present invention comprises a plurality of recording / reproducing irradiation devices, a convex portion having one bit as a base and a triangular prism having one side as a bottom. Convex part A three-dimensional structure is formed, and a plurality of recording / reproducing irradiators with the optical axis perpendicular to each outer wall are arranged on the convex part and placed on each convex three-dimensional outer wall.
It is characterized by recording and reproducing.

Further, the optical disk device of the present invention forms a bit on the three-dimensional outer wall surface of the convex portion, and performs recording / reproduction. The recording / reproducing irradiator is characterized in that the optical axis of the recording / reproducing irradiator is orthogonal to the three-dimensional outer wall surface of the projection.

In the optical disk apparatus of the present invention, the presence / absence of information pits from the optical disk is identified by a recording / reproducing irradiation apparatus which reflects and absorbs one bit surface of the conventional optical disk.

[0011]

Embodiments of the present invention will be described below. In an optical disc according to the present invention, in a preferred embodiment, a triangular prism with one pit as a base, a triangular prism with one side as a bottom, a convex solid is formed, and a three-dimensional surface is formed.
A recording / reproducing irradiation device whose optical axis is orthogonal to
(1a, 1b) shown in FIG.
When the intersection of the optical axis intersects with the conventional optical disk 1-bit surface and there is no convex three-dimensional surface, the optical axis emitted from (1a) in FIG. ) To reflect on (1b)
In addition, the optical axis emitted from (1b) receives and identifies the light reflected on the opposite (1a) and can recognize the conventional optical disk and maintain compatibility. If there is a convex solid, there are two recording / reproducing irradiation devices. Recognizes the bit recording surface recorded on the oblique side of the recording surface.

In the case of the quadrangular pyramid (5) in FIG. 3, a recording / reproducing irradiation device whose optical axis is perpendicular to the outer surface of the quadrangular pyramid is arranged, and the optical axis intersection of the four recording / reproducing irradiation devices is on the conventional recording surface. Communicate with In a conventional optical disk, four recording / reproducing irradiation devices receive and recognize light emitted from the opposing recording / reproducing irradiation device. When there is a quadrangular pyramid projection, four recording / reproducing irradiators, each orthogonal to the outer surface of the quadrangular pyramid, record / reproduce on the hypotenuse of the recording surface and can maintain compatibility.

That is, in a preferred embodiment of the present invention, a track (3 in FIG. 1) of a conventional optical disk is used.
On the 1-bit surface, a convex portion with one bit as the base is provided (1a, 1b in FIG. 4). The optical axis intersection of the recording / reproducing irradiation device intersects with the 3-bit surface of the conventional optical disc, and the opposite recording is performed. By receiving and recognizing the light from the reproducing irradiation device, it is possible to reproduce the recording of the conventional disc.

In the case where the present invention has a convex portion on one bit surface, the convex portion is recorded / reproduced on the oblique side of each recording surface, and the recording capacity is multiplied by the square of the number of each surface irradiated from a plurality of recording / reproducing irradiation devices. When the bit side is small and the recording / reproducing irradiation device becomes smaller and recording becomes possible, recording can be performed in a conical manner, and the recording / reproducing capacity can be increased by the square of the number of recording / reproducing irradiation devices. In addition, the recording capacity can be increased without limit by increasing the number of recording / reproducing irradiation devices.

[0015]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of the present invention;

FIG. 1 is a diagram showing a configuration of a conventional optical disk recording embodiment, which is a schematic diagram showing a part of a track of an optical disk taken out. (Fig. 1)
In the figure, (1) shows a recording / reproducing irradiation device, (2) shows a recording film on a track of a recording portion disk (aluminum reflection film), and (3) shows a one-bit recording state.

FIG. 2 is a schematic diagram showing a part of a track for use of a plurality of recording / reproducing irradiation devices of (1). And the bottom has a length of one bit (from the bottom of the V-shaped groove to the bottom of the next groove), and (1)
(a, 1b) By the recording / reproducing irradiation device, as shown in FIG. 4, the recording / reproducing irradiation device shows a state where (2a, 2b) recording / reproducing is performed on (3a, 3b) recording bits on the oblique side of the recording surface, In the configuration of the recording / reproducing irradiation device of (1a, 1b), when there is no convex portion, the optical axis intersects with the track of the conventional flat recording optical disc on the recording single-bit recording film (aluminum reflective film) on (3) and is relatively opposed to each other. Yes (1a,
1b) The recording / reproducing irradiation device receives the reflected light and recognizes it.

(4) When there is no convex portion The beam emitted from the recording / reproduction / irradiation device in front of the rotation direction in (1a) is:
The beam reflected and absorbed by the bit (recording hole) of (3) is recognized by (1b), and the beam emitted from (1b) is reflected and absorbed by the recording bit (3) and received by (1a) to be received by the conventional plane recording / reproducing. It is an object that recognizes the optical disk surface.

When one side of the triangular prism of (4) is a bottom surface and there is a convex portion, the beam emitted from the recording / reproducing irradiation apparatus of (1a) is reflected and absorbed by the recording bit of (3a) and recorded in (1a). Recognition is received by the reproduction irradiation device (1
The beam emitted from b) is also the convex recording surface (2) of (4).
b) The recording pit (recording hole) (3b) above is recognized by the recording / reproducing irradiation device (1b).

FIG. 3 shows the relationship between the quadrangular pyramid of (5) and the four recording / reproducing irradiation devices. The pyramid base is provided on one bit, and the recording / reproducing irradiation device (1a) is provided on the recording surface (2a). When the optical axis of (1a, 1b) is orthogonal and the intersection of the optical axes of (1a, 1b) is orthogonal to one bit at the base of the pyramid and there is no pyramid (5),
The optical axis of the recording / reproducing irradiation device (1a) reflects and absorbs the base of the pyramid (conventionally, one bit surface of an optical disc), and is received and recognized by the recording / reproducing irradiation device (1b).

FIG. 4 is a schematic diagram showing the relationship between the arrangement of a plurality of recording / reproducing irradiation devices of the present invention and the conventional optical disc reproduction.

(FIG. 3) shows an example of a quadrangular pyramid, and four recording / reproducing irradiation devices are connected to each recording surface (2a, 2b, 2c, 2d).
When the recording / reproducing irradiation device of (1a, 1b, 1c, 1d) is orthogonal to the oblique side of the recording surface and the optical axis of each recording / reproducing irradiation device has a convex portion as shown in FIG.
The light emitted from the recording / reproducing irradiation device (1a) is (3a) the recording bit is recognized by the recording / reproducing irradiation device (1a), and if there is no convex portion, it is arranged so as to be in contact with the conventional optical disk recording surface. (1a, 1b) of (1a, 1b) of FIG. 3 recognizes the object (bit) recorded on the (2a, 2b) surface shown in (FIG. 4). When increasing the number of faces
By increasing the number of planes to 2, 4, 8, and 16 and increasing the number of recording / reproducing irradiation devices at the same time, the previous record can be recognized and the final cone can be obtained.

[0023]

As described above, according to the present invention,
The recording / reproducing irradiation device is downsized while maintaining the recording density compatibility with the conventional optical disk (CD). If the number of recording / reproducing irradiation devices is increased, the recording capacity can be increased without limit.

The reason is that, in the present invention, a convex portion having one bit at the bottom is provided and a plurality of recording / reproducing irradiation devices orthogonal to the side are arranged.

[Brief description of the drawings]

FIG. 1 shows the relationship between a conventional optical disk recording method and a recording / reproducing irradiation apparatus.

FIG. 2 shows a case where two optical recording / reproducing irradiation devices are provided with a convex portion having one bit as a bottom side in an optical disc device according to an embodiment of the present invention.

FIG. 3 shows a case where a polygonal pyramid convex portion having one bit as a base is provided and four recording / reproducing irradiation devices are used according to an embodiment of the present invention.

FIG. 4 is a diagram showing a relationship between two recording / reproducing irradiation devices, a conventional recording surface, and a recording surface of the present invention by providing a convex portion having one bit as a bottom side of the optical disk device according to one embodiment of the present invention. .

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Recording / reproducing irradiation device 1a Recording / reproducing irradiation device 1b in the rotation direction 1b Recording / reproducing irradiation device arranged in the rear direction in the rotation direction 1c Recording / reproduction irradiation device arranged on the left wall in the rotation direction 1d Recording / reproduction irradiation device arranged on the right wall in the rotation direction 2 rotation Direction recording surface 2a Rotation side near recording surface oblique side 2b Rotation direction rear recording surface oblique side 2d Rotation direction side recording surface oblique side 3 Pit (recording hole) 3a Rotation direction near side recording bit (recording hole) 3b Rotation direction rear recording bit (recording hole) 3d rotation direction side recording bit (recording hole) 4 convex portion 5 quadrangular pyramid

Claims (9)

[Claims] In one optical disk, two recording / reproducing irradiating devices are formed, each of which has a convex portion formed on one side of a triangle of a triangular prism which is continuous on a track in the direction of rotation in the recording / reproducing track, and faces a convex outer wall surface. How to place, record and play. 2. A method for recording and reproducing by forming a plurality of continuous polygonal pyramids on a track in the direction of rotation in a recording and reproducing track on an optical disk, and arranging a plurality of recording and reproducing irradiation devices facing each outer wall surface. 3. A method for recording / reproducing by forming a continuous cone on a track in the direction of rotation in a recording / reproducing track on an optical disk, and arranging a plurality of recording / reproducing irradiation devices facing each outer wall surface. 4. On an optical disk, one bit is continuously formed on the track in the direction of rotation, and one side of the triangle is a bottom. One side of the triangle is a bottom surface. A convex portion is formed in the direction of rotation and the outer wall in front of the direction of travel and the next outer wall on the rear side. A method for recording and reproducing by arranging recording and reproducing irradiation devices whose optical axes are orthogonal to each other. 5. A method for providing a recording / reproducing irradiation device in which a protruding polygonal pyramid whose one bit is continuous on the bottom surface is provided on a track in the direction of rotation in an optical disk, and a recording / reproducing irradiation device whose optical axis is orthogonal to each outer wall surface of the polygonal pyramid is provided. . 6. An optical disc, wherein one bit is continuous on the track in the direction of rotation and one side of the triangle is a bottom. One side of the triangle is a bottom surface. In the recording / reproducing method, a recording / reproducing irradiation device having optical axes orthogonal to each other is arranged.
A method in which the optical axis of each recording / reproducing irradiator is brought into contact with the recording / reproducing surface of a conventional planar recording / reproducing optical disk so that the recording / reproducing irradiating device reads a conventional optical disk. 7. A recording / reproducing irradiating apparatus in which one bit forms a continuous polygonal pyramid with a continuous bottom on a track in the direction of rotation in a recording / reproducing track in a recording / reproducing track and a plurality of optical axes facing each outer wall surface are orthogonal to each other.
In the method of arranging and recording / reproducing, a method in which the optical axis of each recording / reproducing irradiator intersects the recording / reproducing surface of the conventional flat recording / reproducing optical disc, and the recording / reproducing irradiator also reads the conventional optical disc. 8. In a recording / reproducing track of an optical disk
A method in which a plurality of recording / reproducing irradiation devices are formed on a track in the direction of rotation in which a protruding cone having a continuous base of one bit as the base is formed, and a plurality of recording / reproduction / irradiation devices perpendicular to the conical surface are arranged.
A method in which the light of each recording / reproducing irradiator is brought into contact with the recording surface of a conventional flat recording optical disc, and the optical axis of the recording / reproducing irradiator crosses the conventional optical disc. 9. An optical disc in which an even number of two or more recording / reproducing irradiation devices are arranged, and both recording / reproducing irradiation devices which reflect and absorb laser light irradiated from the opposing recording / reproducing irradiation device on the recording surface are used. A method of receiving and recognizing light.