JPH0831125A - Information recording and reproducing device having optical tracking function and information recording medium used therein - Google Patents

Abstract

PURPOSE:To improve the efficiency of information recording and reproducing by executing recording and reproducing of the information by using one recording and reproducing device even with many kinds of optical recording media varying in performance and making the tracking of magnetic recording media and magneto-optical recording media common. CONSTITUTION:An optical turn table 1 includes a reflection film 8 which reflects radiations and a transparent substrate 11 which allows transmission of the radiations. A head 4 for optical tracking is arranged on the information recording surface side of the table 1 to execute tracking. Recording and reproducing of many kinds of the optical recording media varying in performance are executable with one recording and reproducing device by a head 5 for information recording and reproducing on an information recording medium side, a head 5a for optical recording and reproducing and a head 5b for magnetic recording and reproducing. Next, a head 4 for optical tracking to be exclusively used for the table 1 and a head for recording and reproducing the information on and from the medium 3 are disposed in the case of placing of the disk-shaped information recording medium on the table 1. The recording and reproducing of the information are thus executed by making the magnetic recording media and the magneto-optical recording media com on.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information recording / reproducing apparatus comprising an optical tracking signal or an optical turntable on which an optical tracking signal and an information recording area address signal are formed, and an information recording medium used therefor.

[0002]

2. Description of the Related Art In a conventional information recording / reproducing apparatus, a dedicated magnetic recording / reproducing apparatus is used for a magnetic disk, a floppy disk, etc. for magnetically recording information, while the optical recording / reproducing apparatus is optically operated by radiation such as a laser beam. An optical recording / reproducing apparatus has been used in an optical information recording medium of a type that records information. Moreover, since there are many types of magnetic information recording media and optical information recording media,
Therefore, when using a plurality of information recording media for different purposes, it is necessary to provide a dedicated recording / reproducing device for each, which is very inconvenient for the user, and this is an obstacle to the popularization of the information recording media. Information is recorded on the magnetic information recording medium by the magnetization of the magnetic recording layer, and the recorded information can be magnetically reproduced, erased, and re-recorded. On the other hand, the optical information recording medium is a read-only type optical disk (CD, laser disk, etc.) that optically reproduces information recorded in advance on a recording film plane by a signal element having an uneven shape such as prepits and pregrooves.
Or a write-once optical disc that can be recorded only once by forming an uneven signal element or perforation element by means of radiation or laser beam on the recording film plane, and thermomagnetically recorded, erased and optically reproduced. There are many types such as magneto-optical disks. The magnetic information recording medium has a drawback that it is inexpensive but has a relatively small recording capacity, and the optical information recording medium has a large recording capacity but is expensive, and thus has advantages and disadvantages. Since the track width for tracking and the size of the recording element domain in the magnetic disk are determined by the magnetic head width, the track area occupied in the information recording area is necessarily larger than that of the optical disk. In an optical disk, the track groove width and the recording element are small because tracking is performed with extremely fine radiation, and therefore the area of the track occupying the information recording area is very small. The above difference in track width is one of the factors that make the recording capacity of the magnetic disk smaller than that of the optical disk. By the way, in the recording area of the magnetic disk and the optical disk, a pre-format pattern for pre-information for tracking and address is formed.
For this purpose, each disk is used after being initialized. In the case of an optical disc, a master on which a preformat pattern is recorded is made, a stamper is made from the master, and the preformat pattern is transferred to the replica layer of each optical disc by the stamper to form a recording film on the replica layer. Is manufactured by.

[0003]

As described above, there are many kinds of conventional magnetic recording media such as magnetic disks or optical information recording media such as optical disks, and recording media having these various characteristics are used. When recording / reproducing information, it is necessary to use a dedicated recording / reproducing device, which is very inconvenient for the user and uneconomical, which is a major obstacle to the popularization of the information recording medium. Was there. Further, although pre-format patterns such as tracking and addresses are formed in the recording area of the magnetic disk or the optical disk, the pre-format pattern is individually used in advance in the magnetic disk and used in the optical disk. Since it was manufactured by transferring it to the recording layer, there was a problem that the manufacturing process of the optical disk was complicated and the manufacturing cost was high.

The problem to be solved by the present invention is (1)
To make the recording / reproducing device versatile or multifunctional so that information of various kinds of optical recording media can be recorded / reproduced by one recording / reproducing device, and (2) recording / reproducing of both magnetic recording medium and optical recording medium. To make the recording / reproducing apparatus versatile or multifunctional, and (3) for this purpose, different tracking methods for conventional magnetic recording media and optical recording media are made common to each other. (4) It is inevitable to increase the recording capacity of the magnetic disk by solving the above-mentioned problems, and to speed up the recording / reproducing access of information. An object of the present invention is to solve the above-mentioned problems in the prior art, to improve the convenience of means for recording / reproducing information on / from a magnetic recording medium and an optical recording medium, and secondarily, an inexpensive information recording medium with low manufacturing cost. It is also an object of the present invention to provide an information recording / reproducing apparatus which provides quick information recording / reproducing access and further increases the information recording amount of a magnetic disk.

[0005]

In order to achieve the above object of the present invention, information is recorded on an information recording medium such as an optical disk, a magneto-optical disk, a magnetic disk or a floppy disk by a common optical tracking method. The present invention constitutes a device for reproducing and an information recording medium which is suitably used by being mounted on the recording / reproducing device. Next, a specific example of the information recording / reproducing apparatus of the present invention will be described. In the recording / reproducing apparatus shown in FIG. 1, as a turntable on which the information recording medium 3 is placed, an optically reproducible tracking information signal pattern 12 enabling optical tracking is recorded on at least one surface. The optical turntable 1 capable of optical tracking is provided. Further, as shown in FIG. 2, the information recording / reproducing apparatus of the present invention has a function of optical tracking on at least one surface on the same rotary shaft 10 which is separate from the turntable 2 for mounting the information recording medium. Alternatively, the optical turntable 1 may be provided.
As shown in FIG. 3, the optical turntable 1 having the optical tracking function includes a reflective film 8 with a tracking signal information pattern that reflects at least radiation, and
It is a plate-shaped optical turntable 1 which is composed of a transparent substrate 11 which transmits radiation, has a tracking information signal pattern 12 for optical tracking formed thereon, and is fixed to a spindle 9 and a rotary shaft 10. . In the optical turntable 1, the reflective film 8 is provided on the transparent substrate 11, one surface of the reflective film (the side opposite to the transparent substrate side) may be exposed, and the protective film 13 such as resin is used. May be covered with. In addition, on the reflective film surface side of the transparent substrate 11, uneven pre-pits and pre-grooves are formed. Further, as shown in FIG. 4, the information recording medium 3 is placed on the surface opposite to the tracking signal surface of the turntable 2 having the optical turntable 1 capable of optically tracking on one surface. It may have a structure. According to the present invention, an optical recording head 4 is disposed on the optical tracking signal forming surface side of the optical turntable 1 for tracking, and is an information recording / reproducing head 5 disposed on the information recording medium side. The present invention relates to an information recording / reproducing apparatus having a function of recording / reproducing information by a reproducing head 5a and a magnetic recording / reproducing head 5b. The tracking information signal pattern 12, which is an optically trackable signal, is recorded and formed on at least one surface of the reflection film (reflection film with tracking pattern) 8, and the radiation from the optical tracking head 4 of the information recording / reproducing apparatus is used. Tracked by the beam. When the information recording medium 3 has a disc shape, an optically trackable disc-shaped optical turntable 1 is used (hereinafter abbreviated as an optical turntable). The turntable 2 for placing the disc and the optical turntable 1 in the form of a disc plate capable of optically tracking may be integrally connected and fixed by a rotary shaft 10, and the turntable 2 for placing the disc The optical plate-shaped optical turntable 1 may be adhered to each other or may be separated, but the center of the optical tracking and the center of the rotary shaft 10 must be concentric. When the information recording medium is in the form of a card, the optically turnable optical turntable 1 of the present invention or a turntable on which the information recording medium having the optical turntable 1 mounted and fixed is placed. It goes without saying that 2 is a card. The outer diameter of the optical turntable 1 is generally set to be equal to or larger than the outer diameter of the disk-shaped information recording medium 3 used. However, on the basis of the pitch of the optical tracking tracks formed on the optical turntable 1, the track pitch for information recording / reproducing in which the recording / reproducing heads 5, 5a, 5b on the information recording medium side operate is determined. In a recording / reproducing apparatus equipped with a controller that is determined by the product of the track pitch of the optical turntable 1 and a constant coefficient, the outer diameter of the optical turntable 1 is larger than the outer diameter of the disc-shaped information recording medium 3. It may be set small. In this case, the above coefficient may be stored in advance in a memory for automatic control in the recording / reproducing apparatus, or may be stored in the information recording medium 3 at a predetermined position required as initial control information, for example, on the inner circumference side of the user information recording area. It can be used by recording in the outer area or the outer area of the outer peripheral side area. On the surface of the optical turntable 1 on which the disc-shaped information recording medium 3 is placed,
A jig or a component for immovably fixing the disc-shaped information recording medium 3 is provided near the spindle 9. Further, a holding device for the disc-shaped information recording medium 3 is mounted to prevent the disc-shaped information recording medium 3 from protruding from the optical turntable 1 due to the rotation of the optical turntable 1. FIG. 8 shows an example in which the magnet clamper 27 is used as a holding device for the information recording medium 3. The information recording / reproducing apparatus of the present invention includes an optical tracking head 4 dedicated to the optical turntable 1 for obtaining tracking information from the optical turntable 1.
And an information recording / reproducing head 5 for recording / reproducing information on / from the information recording medium 3 mounted on the optical turntable 1. The optical tracking head 4 and the information recording / reproducing head 5 are mechanically connected and fixed by a connecting body, and the optical tracking head 4 and the information recording / reproducing head 5 are Electrical signals are connected by an electric circuit for controlling recording / reproduction of information on the information recording medium 3. Further, in the information recording / reproducing apparatus of the present invention, the tracking pitch necessary for tracking the information recording / reproducing of the information recording medium used in the information recording / reproducing apparatus is set on the basis of the tracking pitch of the turntable capable of optical tracking. A control circuit for converting is provided. Further, in the information recording medium system, the conversion control signal for the control circuit for converting the information recording medium head into the tracking pitch necessary for the information recording / reproducing operation is recorded at the reference position on the information recording medium.

[0006]

【Example】

Example 1 For optical tracking, radiation such as normal light or laser beam is used. The reflective film 8 with a tracking pattern, which is a plate-like substance that reflects radiation, is generally a metallic element such as Al, Au, Ag, or P.
t, Pd, Rh, Co, Cr, Ni, Cu, Ti, Si, W, T
Alloys composed of e, Bi, etc., such as Al-Ti, Pt-Co,
Fe-Cr, Fe-Cr-Ni, Fe-Cr-Ti, Al-Co and the like are used. In addition, a transparent substrate that transmits the above radiation
Examples of the substance constituting 11 are ceramics such as glass, PC (polycarbonate) resin, acrylic resin, P
Plastics such as MMA (polymethylmethacrylate) resin, epoxy resin, and radiation curable resin are used. An epoxy resin, a radiation curable resin, or the like is used for the protective film 13. The information recording medium 3 is a laser disc, a writable compact disc (writable C
D), a write-once type optical disc, a phase change type optical disc, a magneto-optical disc, a hard magnetic disc, a floppy disc, etc., an information recording medium 3 of a system for recording and reproducing information by tracking is used. The optical turntable 1 on which the tracks capable of optical tracking are formed has a rectangular plate shape in a recording / reproducing apparatus for an information recording card, and has a disk shape in a recording / reproducing apparatus for a disc-shaped recording medium. The optical turntable 1 forming a track capable of optical tracking is provided with a rotating shaft 10, and the rotation center of the rotating shaft 10 coincides with the center of optical tracking. The outer diameter of the optical turntable 1 is set to be equal to or larger than the outer diameter of the disk-shaped information recording medium 3 used, as shown in FIGS. On the side of the optical turntable 1 where the disc-shaped information recording medium 3 is installed, there are a spindle 9 for inserting into the spindle insertion hole of the disc-shaped information recording medium 3 and a positioning component such as a pin for the disc-shaped information recording medium. It is provided. The tracking signal surface of the optical turntable 1 is shown in FIG.
As shown in (a), (b) and FIGS. 10 (a), (b), prepits for tracking, wobbling prepits (see FIG. 12), pregrooves, clock pits, etc. are formed. If necessary, pre-pits such as sector address or track number are also formed. 10 (a) and 10 (b) show an embodiment of an optical tracking signal pattern of a spiral track composed of pre-pits, and FIG. 11 shows an embodiment of a plurality of spiral tracking signal patterns. The pre-grooves, pre-pits, etc. used in the optical turntable 1 are generally irregularities formed on the surface of the reflection film 8, but holes may be formed in the reflection film 8. The information composed of the concave-convex pre-pits and the pre-grooves described on the surface of the reflective film 8 is reproduced as a signal of brightness and darkness due to the interference of the light reflected from the surface of the reflective film 8. When a hole is formed in the reflective film 8, light is reproduced from the light or darkness of the light due to no or little reflection of light from the hole. FIGS. 16 (a) to 16 (d) show types of tracking methods for the optical turntable.
FIG. 16B shows a reflection layer 37 used for an optical turntable.
In addition, a signal pattern for optical tracking is formed with prepits of the light transmission hole 38 method. Fig. 16
(A) is a reflection layer for an optical turntable of FIG. 16 (b)
The optical turntable has a structure in which 37 is covered with a transparent layer 35 made of a transparent resin. FIG. 16C shows the transparent substrate 11
A reflective film having optical tracking signal pre-pits or pre-grooves 41 is provided on one surface of the transparent substrate 11
And two reflective films are made to face each other and bonded to each other in an air sandwich structure. Fig. 16 (d) is the same as Fig. 16 (c).
The reflective film in 1 is provided on only one side. The recording / reproducing apparatus incorporating the optical turntable 1 is mounted on the optical turntable 1 and an optical tracking head 4 dedicated to the optical turntable 1 for obtaining a tracking information signal from the optical turntable 1. It holds an optical recording / reproducing head 5a and a magnetic recording / reproducing head 5b for recording / reproducing information on / from the information recording medium 3. The optical tracking head 4 and the optical recording / reproducing head 5a for recording / reproducing information and the magnetic recording / reproducing head 5b are mechanically connected and fixed by a connecting body. The tracking signal controls the recording / reproducing of information on the information recording medium 3 of the optical recording / reproducing head 5a and the magnetic recording / reproducing head 5b for recording / reproducing information. That is, the control circuit of the recording / reproducing apparatus specifies the recording location by the address signal and the clock signal such as the header pit signal, the track number signal, the sector number signal included in the tracking signal from the optical tracking head 4, and the start / end of the recording / reproducing. And control.

The information recording medium 3 used in the information recording / reproducing apparatus equipped with the optical turntable 1 does not necessarily require an address signal such as a header pit signal, a track number signal, a sector number signal, a clock signal, etc. Even if the address signal such as the number signal and the sector number signal is not formed, there is practically no problem. Therefore, even if a magnetic disk, a floppy disk, an optical disk, etc., in which the recording film or the reflective film has no uneven pre-pits or pre-grooves and is uniformly and flatly formed, the optical turntable of the present invention is used. Recording / reproducing of information can be performed by the recording / reproducing apparatus provided with. As shown in FIGS. 5A, 5B, and 5C, the surface of the optical turntable 1 on which the disc-shaped information recording medium 3 is installed or the turntable 2 for installing the disc-shaped information recording medium 3 is as shown in FIGS. The positioning pin 14 and the spindle 9 of the disc-shaped information recording medium 3 are formed. The center of the spindle 9 is the tracking center of the disc-shaped information recording medium 3 and also the rotation axis. The positioning pin 14 is preferably formed at a position indicating a tracking reference position of the optical turntable 1 and an address reference point such as a track number and a sector number. For example, a tracking starting position, an address reference such as a track number 0 and a sector number 0. point,
Most preferably, it is provided at a position representing the header pit position or the like. Positioning pin 14 in optical turntable 1
It is appropriate that the location is provided in a portion other than the recording film forming area of the disc-shaped information recording medium 3, particularly in a portion other than the information recording area, and as shown in (d) and (e) of FIG.
Generally, near the spindle hole 15 on the inner peripheral side of the disc-shaped information recording medium 3, particularly in the case of a disc-shaped recording medium with a hub, the area of the optical turntable 1 where the hub 17 is located is suitable. The disc-shaped information recording medium 3 has a positioning pin 14
A positioning pin insertion hole 16 is formed at a position for receiving the positioning pin.
The positioning pin insertion hole 16 of the disc-shaped information recording medium 3 is
Although it may or may not penetrate in the thickness direction of the medium, if the positioning pin insertion holes 16a and 16b are provided on both sides of the information recording medium as shown in FIG. 5 (f), they face each other. However, it is more preferable that they are formed at positions not facing each other. A plurality of positioning pins 14 and positioning pin insertion holes 16 may be provided in one medium.
In the case where the spindle 9 of the optical turntable 1 is, for example, shaped like a gear and the positioning pin is configured such that the length of a specific tooth of the gear shaped spindle is longer than that of other teeth, a disc-shaped information recording medium As shown in FIG. 6, the positioning pin insertion hole 16 of No. 3 may be formed in a groove shape longer than the others. The position of at least one positioning pin 14 formed on the optical turntable 1 is the start position of the track in the information recording area of the disc-shaped information recording medium 3, the start position of the address recording information such as the track number and the sector number, and the track. It is provided at a position where address information is recorded, such as a number and a sector number, and is provided at a position that can be used as a reference position when recording and reproducing information. At least one positioning pin 14 formed on the optical turntable 1
May be integrally connected to the spindle 9 as shown in FIG. 5 (b). In many cases, the disc-shaped recording medium is rotatably inserted into the disc cartridge case and used, but the disc-shaped recording medium alone may be used as it is. In any case, in the information recording / reproducing apparatus, it is necessary to fix the disc-shaped recording medium on the optical turntable, and when the optical turntable and the disc-shaped recording medium are rotated at high speed, In order to prevent the disk-shaped recording medium from jumping out of the optical turntable, it is necessary to mechanically hold the disk-shaped recording medium in the vicinity of the spindle.

As shown in FIGS. 7A and 7B, when the disc-shaped recording medium 3a is rotatably loaded in the disc cartridge case 19 and used, the spindle insertion hole 20 of the disc cartridge case 19 is The disc-shaped recording medium 3a must be connected to the optical turntable 1 at a portion. At this time, the disk cartridge case
19 and the optical turntable 1 do not touch,
Further, it is necessary to prevent the disc cartridge case 19 and the disc-shaped recording medium 3a from coming into contact with each other. For this reason, a disc member having a diameter that can be inserted without touching the case material of the spindle insertion hole 20 of the disc cartridge case and thicker than the thickness of the disc cartridge case 19 is joined near the spindle of the turntable 2 to form a step. The optical turntable 1 is suitable. Alternatively, a circular convex surface portion 22 having a large substrate thickness is formed in the vicinity of the spindle insertion hole 20 of the disk-shaped recording medium 3a, or a circular convex surface hub is bonded and fixed to the substrate in the vicinity of the spindle insertion hole 20. Then, the diameter of the circular convex surface portion 22 is set to a size that allows the circular convex surface portion 22 to enter the spindle insertion hole 20 without touching the case material on the outer periphery of the spindle insertion hole 20 of the disk cartridge case, and the depth of the circular convex surface portion 22 is set. A disc-shaped recording medium having a thickness larger than the thickness of the outer peripheral case plate of the spindle insertion hole 20 may be rotatably loaded in the disc cartridge case. Another configuration of the optical turntable according to the present invention is a turntable made of metal, ceramics, or resin directly connected to a rotation shaft of a rotation drive motor for a disk-shaped recording medium,
An optical disc, which is composed of at least a transparent substrate on which a tracking signal pattern is formed, a recording film or a reflective film, and a protective film, may be bonded and fixed. In this case, it is most preferable that the optical disc is arranged on the opposite side of the surface of the turntable on which the disc-shaped recording medium is placed. If the axis of rotation of the optical turntable and the center of the optical tracking signal of the optical disc are concentric, the turntable and the optical disc may be fixed at separate positions on the same axis of rotation. An information recording medium used in a recording / reproducing apparatus provided with an optical tracking table of the present invention uses an optical head for an information recording medium controlled by a tracking signal by the optical head of the optical tracking table or a magnetic head for recording information. Information is recorded and reproduced in the recording area. Therefore, in the information recording / reproducing apparatus of the present invention, an information recording medium having pregrooves, prepits, address recording signals, etc. can be used. However, the greatest feature of the present invention is that an information recording medium on which pre-recording information such as pre-grooves and pre-pits is not formed can be used. Further, both sides of the structure in which an information recording medium having pregrooves, prepits or address recording signals formed thereon and an information recording medium having no preformat pattern such as pregrooves, prepits or address recording signals formed thereon are adhered to each other. Even an information recording medium of a recording system can be used. When the disc-shaped recording medium used in the recording / reproducing apparatus provided with the optical turntable of the present invention is an optical disc or a magneto-optical disc, an optical recording medium controlled by the tracking of the optical head in the optical turntable is used. Information is recorded / reproduced in / from the information recording area of the optical disk or the magneto-optical disk by the head or the magnetic head.
An optical disc that does not form a pre-format pattern such as pre-groove, pre-pit or address recording signal,
For magneto-optical discs, it is not necessary to make a master disc made of a photoresist film produced by cutting and then developing a pre-format pattern used in the production of conventional optical discs and magneto-optical discs. There is no need to build a stamper. That is, an optical disk or magneto-optical disk having a structure in which a recording film is simply laminated on a smooth transparent substrate, or a base film and a recording film are laminated in this order on a smooth transparent substrate is used as an information recording medium. The optical disc having such a configuration is extremely easy to manufacture, and therefore has high productivity and low production cost.
It has the effect of being cheaper. When the disk-shaped recording medium used in the information recording / reproducing apparatus of the present invention is a magnetic disk or a floppy disk, the recording magnetic head controlled by the signal of the tracking head of the optical turntable is used for recording the magnetic disk or the floppy disk. The recording element in the information recording area is recorded and reproduced. However, when the recording element by the magnetic head is much larger than the recording element by the optical head, the track pitch of the magnetic disk must be set larger than that of the magneto-optical disk or the optical disk. However, in an information recording / reproducing apparatus equipped with a magnetic head such as a thin film magnetic head having a very small thickness or width, the track pitch of the magnetic disk can be made smaller.
The tracking track pitch of the optical turntable and the track pitch for recording / reproducing information on the magnetic disk or the floppy disk in the information recording / reproducing apparatus of the present invention are not necessarily the same, but they are the same. Is preferred. If they are the same, the information recording densities of the optical disk and the magnetic disk are the same. In general, the use of optical turntable tracking can be expected to increase the information recording capacity of magnetic disks.
The tracks on the track forming surface of the optical turntable in the information recording / reproducing apparatus of the present invention are a combination of a magnetic disk track (having a large track pitch) and an optical disk track (having a small track pitch), and alternate on the same plane. Alternatively, a method of forming them side by side (see FIG. 13) may be used. In FIG. 13, optical tracking tracks of an optical turntable are formed concentrically, and each track tracks the smallest pitch when recording / reproducing information on an optical disk, but records / reproducing information on a magnetic disk. In this case, it is shown that tracking is possible at a constant number of tracks. Alternatively, the optical turntable in the information recording / reproducing apparatus of the present invention has a magnetic disk track (having a large track pitch) formed on one side,
An optical turntable structure of a double-sided track forming system (see FIG. 15) in which a track for an optical disk (having a small track pitch) is formed on the opposite surface may be used. In this case, the two tracking optical heads may be separately arranged on both sides of the optical turntable, but one tracking optical head is moved to both sides of the optical turntable as required. It is even better if it is controlled and functions as a tracking control operation. Further, the information recording / reproducing apparatus of the present invention is provided with two or more optical turntables as shown in FIG. 14, at least one of which is used for tracking for a magnetic disk and at least another one is used for tracking for an optical disk. The information recording / reproducing apparatus may be configured as described above.
Furthermore, the information recording / reproducing apparatus of the present invention has one or more optical turntables, and the optical turntable is formed separately from the turntable on which the disc-shaped recording medium is mounted [FIG. 15 and FIG. 10 (b)]. Furthermore, the information recording / reproducing apparatus of the present invention has one or a plurality of optical turntables, and the optical turntable is separable from the turntable on which the disc-shaped recording medium is mounted. It may be one that can be attached and detached from.

<Embodiment 2> The optical turntable of the present invention may be constructed so that it can be freely detached from and attached to the information recording / reproducing apparatus. The optical turntable thus manufactured has the advantage that the user can carry or store the disc-shaped recording medium and the optical turntable together. FIG. 17 shows another turntable in which a removable and attachable optical turntable 1 is attached to a turntable 2a of a recording / reproducing apparatus by a magnetic clamp method, and a disc-shaped recording medium 3a is opposed to the optical turntable 1. It is used by fixing it to 2b. Fig. 18 shows an enlarged view of the part attached by the magnetic clamp method. A non-slip cushion 23 is formed on the turntable 2a at the contact portion between the optical turntable 1 and the turntable 2a. A non-slip cushion is also used in a turntable on which a disc-shaped recording medium is placed. The magnetic hub 25 with the spindle hole 15 of the optical turntable 1 is magnetically clamped to the turntable 2a. By directly contacting the disc-shaped recording medium 3a and the optical turntable 1 in FIG. 17, the disc-shaped recording medium 3a and the optical turntable 1 are turned into the turntables 2b, 2a.
Can be strongly fixed to. Optical tracking is
The tracking information signal pattern 12 formed on the optical turntable 1 is performed by the optical tracking head 4, and the optical information recording / reproducing head 5 is used for information recording / reproducing. FIG. 20 shows another example of the magnetic hub 25 with the spindle hole 15 used in the optical turntable 1. By using the non-slip cushion 23 on the disk-shaped recording medium 3a side of the magnetic hub 25, the optical turntable 1 and the disk-shaped recording medium 3a can be fixed more strongly. Since the magnetic hub 25 used for the optical turntable 1 is fixed to the optical turntable 1 with the flange portion protruding to the outside of the protective film 13 made of resin, the disk-shaped recording medium 3a has the magnetic hub 25. Since they come into pressure contact with each other near the rotation center and do not come into contact with the resin protective film 13 of the optical turntable 1, the disk-shaped recording medium 3a and the protective film of the optical turntable 1 are scratched. It is prevented to receive such. FIG. 19 shows a method in which the removable and attachable optical turntable 1 is attached and fixed to the turntable 2c of the recording / reproducing apparatus by a vacuum suction method. The disk-shaped recording medium 3a can be vacuum-sucked by the vacuum suction of the suction nozzle 26 formed on the turntable 2c.
The optical turntable 1 is strongly attracted and fixed to the disc-shaped recording medium 3a. And optical turntable 1
By pressing the disc-shaped recording medium 3a with the other turntable 2b facing the optical turntable 1, the optical turntable 1 can be more strongly pressed and fixed.

[0010]

The information recording / reproducing apparatus incorporating the optical turntable having the optical tracking function of the present invention uses a single recording / reproducing apparatus to record information even if it is an optical recording medium of various types having different performances. It is possible to perform the recording and reproducing of the information, and by using the common tracking of the magnetic recording medium and the magneto-optical recording medium, it is possible to perform the recording and reproducing of the information using both recording media, and further to increase the recording capacity of the magnetic disk. It is possible to increase the speed and speed up the recording / reproducing access of information. Even if the recording medium used in the information recording / reproducing apparatus having the optical tracking function of the present invention is an optical disk or a magneto-optical disk which does not form a pre-format pattern such as a pre-groove, pre-pit or address recording signal, information recording / reproducing is possible. Since this is possible, it is not necessary to make a master of a pre-formatted pattern, the manufacturing process of the disk recording medium can be remarkably omitted, and an inexpensive information recording medium can be obtained.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing an example of the configuration of an information recording / reproducing apparatus of the present invention.

FIG. 2 is a schematic diagram showing an example of another configuration of the information recording / reproducing apparatus of the present invention.

FIG. 3 is a sectional view showing an example of the configuration of an optical turntable provided in the information recording / reproducing apparatus of the present invention.

FIG. 4 is a cross-sectional view showing another example of the configuration of the optical turntable provided in the information recording / reproducing apparatus of the present invention.

FIG. 5 is a schematic diagram showing an example of a mounting structure of an optical turntable and an information recording medium provided in the information recording / reproducing apparatus of the present invention.

FIG. 6 is a plan view showing an example of the configuration of an information recording medium attached to the optical turntable of the present invention.

FIG. 7 is a schematic diagram showing an example of a structure in which a disc-shaped recording medium housed in a disc cartridge case is attached to an optical turntable of the information recording / reproducing apparatus of the present invention.

FIG. 8 is a schematic diagram showing an example of a structure in which an information recording medium is fixed to an optical turntable according to the present invention by a magnet clamper.

FIG. 9 is a schematic view showing an example of the configuration of pregrooves (spiral grooves for tracking) of the optical turntable according to the present invention.

FIG. 10 is a schematic diagram showing an example of the structure of a pre-pit spiral for tracking of an optical turntable according to the present invention.

FIG. 11 is a schematic diagram showing an example of a tracking configuration of an optical turntable according to the present invention.

FIG. 12 is a schematic view showing an example of the structure of a wobbling prepit track of the optical turntable according to the present invention.

FIG. 13 is a schematic view showing an example in which a magnetic disk track and an optical disk track are combined with the optical turntable according to the present invention.

FIG. 14 is a schematic diagram showing an example of a configuration in which an optical turntable for a magnetic disk and an optical turntable for an optical disk are provided side by side with the optical turntable according to the present invention.

FIG. 15 is a schematic diagram showing an example of a double-sided track forming method for optical tracking for a magnetic disk and optical tracking for an optical disk in the optical turntable according to the present invention.

FIG. 16 is a schematic diagram showing the types of tracking methods for an optical turntable according to the present invention.

FIG. 17 is a schematic diagram showing an example of the configuration of an optical turntable having a detachable structure according to the present invention.

FIG. 18 is an enlarged view of the magnetic clamp part in FIG. 17.

FIG. 19 is a schematic view showing an example of another configuration of the optical turntable having a detachable structure according to the present invention.

FIG. 20 is a schematic diagram showing an example of a configuration in which an anti-slip cushion is used in an optical turntable having a detachable structure according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Optical turntable 1a ... Optical turntable for optical disks 1b ... Optical turntable for magnetic disks 2, 2a, 2b, 2c ... Turntable 3 ... Information recording medium 3a ... Disc-shaped recording medium 4 ... For optical tracking Head 4a ... Optical tracking head for optical disk 4b ... Optical tracking head for magnetic disk 5 ... Information recording / reproducing head 5a ... Optical recording / reproducing head 5b ... Magnetic recording / reproducing head 6 ... Signal controller 7 ... Recording layer 8 ... Reflective film (Reflective film with tracking pattern) 9 ... Spindle 10 ... Rotating shaft 11 ... Transparent substrate 12 ... Tracking information signal pattern 13 ... Protective film 14 ... Positioning pin 15 ... Spindle hole 16, 16a, 16b ... Positioning pin insertion hole 17 ... Hub 18 Adhesive layer 19 Disc cartridge case 20 Pindle insertion hole 21 ... Disc member 22 ... Circular convex surface 23 ... Anti-slip cushion 24 ... Turntable clamp magnet 25 ... Magnetic hub 26 ... Suction nozzle 27 ... Magnet clamper 28 ... Magnetic plate 29 ... Spiral groove for tracking (pre) Groove 30 ... Tracking pre-pit spiral 31 ... Tracking A 32 ... Tracking B 33 ... Tracking C 34 ... Wobbling pre-pit track 35 ... Transparent layer 37 ... Reflective layer 38 ... Light transmitting hole 40 ... Air 41 ... Optical tracking signal Prepit or pregroove

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Claims (12)

[Claims] 1. An information recording / reproducing apparatus for recording / reproducing information by selectively using a magnetic recording medium, an optical information recording medium, or both a magnetic recording medium and an optical information recording medium,
The information recording medium is mounted on a turntable which is optically reproducible on at least one surface of a common tracking information signal or the tracking information signal and the address signal in the information recording area of the information recording medium. An information recording / reproducing apparatus having a means for recording / reproducing information by a common optical tracking method. 2. An information recording / reproducing apparatus for recording / reproducing information by selectively using a magnetic recording medium, an optical information recording medium, or both a magnetic recording medium and an optical information recording medium,
An optical tracking turntable formed so that a common tracking information signal or a tracking information signal and an information recording area address signal on the information recording medium can be optically reproduced on at least one surface or both surfaces, and the optical turn. A means separate from the table and equipped with a turntable for mounting the information recording medium, which is provided on the same rotary shaft, for mounting the information recording medium, and capable of recording and reproducing information by a common optical tracking method An information recording / reproducing apparatus characterized in that 3. The reflection table with a tracking signal pattern according to claim 1 or 2, wherein at least one turntable capable of optical tracking is provided, and the optical turntable has a tracking signal pattern for reflecting at least radiation on one side or both sides. An information recording / reproducing apparatus comprising a film and a transparent substrate which transmits the radiation, and at least one optical tracking head is provided on each of the tracking signal surfaces. 4. The turntable for mounting an information recording medium according to claim 1 or 2,
An information recording / reproducing apparatus characterized in that at least one information recording / reproducing head is provided on each of the information signal surfaces of the information recording medium. 5. The information according to any one of claims 1 to 4, wherein the turntable capable of optical tracking has a structure which can be freely detached from and attached to the information recording / reproducing apparatus. Recording / playback device. 6. An information recording medium used in the information recording / reproducing apparatus according to claim 1, wherein the information recording / reproducing device is a magnetic recording medium, a magneto-optical recording medium or an optical information recording / reproducing system by tracking. An information recording medium, which is a recording medium on which a pre-format pattern such as a pre-groove, a pre-pit or an address recording signal is not formed. 7. The information recording medium according to claim 6, wherein the information storage medium is a laser disk, a writable compact disk, a write-once optical disk, a phase change optical disk, a magneto-optical disk, a hard magnetic disk, and a floppy disk housed in a disk cartridge case. An information recording medium, which is a disc. 8. An engagement member for fixing the reference position of the information recording medium, which is placed on the turntable, to a fixed reference position of the turntable. An information recording medium having a combination means formed therein. 9. The information recording / reproducing apparatus according to claim 1, wherein the reference position of the information recording medium used in the information recording / reproducing apparatus is always a predetermined reference position on the turntable surface. An information recording / reproducing apparatus characterized in that an engaging means for engaging and fixing is formed. 10. The size of the outer shape of a turntable capable of optical tracking in the information recording / reproducing apparatus according to any one of claims 1 to 5, is the information used by being mounted on the turntable. An information recording / reproducing apparatus, characterized in that the information recording / reproducing apparatus is configured to be always larger than the outer size of a recording medium. 11. An information recording device for use in an information recording / reproducing apparatus according to any one of claims 1 to 5, based on a tracking pitch of a turntable capable of optical tracking in the information recording / reproducing apparatus. An information recording / reproducing apparatus characterized in that a control circuit for converting into a tracking pitch necessary for tracking information recording / reproducing of a medium is provided. 12. A conversion control signal for a control circuit for converting the information recording medium head according to claim 11 into a tracking pitch necessary for an information recording / reproducing operation, is recorded at a reference position on the information recording medium. Information recording medium system.