JPH0495288A - Optical information reproducing device - Google Patents

Abstract

PURPOSE:To attain the function of a two portion as a whole by a simplified constitution by constituting the device so that with respect to recording, reproduction or erasure of information to plural recording mediums, an optical head used in common for them. CONSTITUTION:In the device main body, arrangement areas for two pieces of recording mediums 1a, 1b are prepared, and in each arrangement area, driving means 6a, 6b for turning the recording mediums 1a, 1b are provided, and also, an optical head 4 which can execute a seek movement in common extending over the arrangement area is provided. That is, in the device main body, one optical head 4 used in common is placed, and an access can be executed selectively to plural recording mediums 1a, 1b. In such a way, such versatility as continuous recording and reproduction under the control from a host side, or information can be copied from one recording medium to the other recording medium by one set of device, etc., is obtained.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an optical system that records, reproduces, or erases information optically or magneto-optically by irradiating a disk-shaped recording medium with a light beam. The present invention relates to an information recording and reproducing device.

[Prior Art] In the above-mentioned optical information recording/reproducing device, the above-mentioned recording medium is loaded into the main body of the device, and the above-mentioned recording medium is rotated by a driving means such as a spindle motor, and in this state, the optical head is accessed to the above-mentioned recording medium. Information is recorded, reproduced, or erased optically or magneto-optically by irradiating the recording medium with a light beam. The optical head used here is, for example,
As shown in FIG. 8, the light emitted from the semiconductor laser 41 is converted into a parallel beam through a collimator lens 42, and is supplied to an objective lens 44 through a polarizing beam splitter 43. A light spot is formed on the recording medium) 40, and the reflected light from the optical disk 40 is transmitted to the servo sensor 48, R
The configuration is such that it is supplied to the F sensor 49. Here, one optical system as a whole is provided on all optical heads 30 so that they can move in the theta direction.

As shown in FIG. 7, the optical head 30 normally seeks in the disk system direction along a guide rail 32 by a linear motor. Electrical connections of sensors and actuators are made by a flexible substrate 33, and a linear motor 31, a spindle motor 34 for rotating the disk, a guide rail 32, etc. are attached to a base 36.

In such a configuration, seeking is performed by moving the optical head 30 from the inner circumferential area to the outer circumferential area of one optical disk,
Information is then optically recorded, reproduced, or erased.

[Problems to be Solved by the Invention] However, when copying information from one optical disc to another optical disc, two optical information recording and reproducing devices are required. Therefore, efforts have been made to simplify the entire system by arranging a plurality of optical disk drive means within one apparatus main body to form a dual drive system, which can be realized with a single disk copying apparatus.

[Objective of the Invention] The present invention has been made based on the above circumstances, and is capable of recording, reproducing, or erasing information on a plurality of recording media by using an optical head that is shared by these media. The present invention aims to provide an optical information recording/reproducing device with high system performance that can achieve the same functions with a simpler configuration.

[Means for Solving the Problems] Therefore, in one aspect of the present invention, a light beam is irradiated onto a disk-shaped recording medium to record information optically or magneto-optically.
In an optical information recording/reproducing device for reproducing or erasing information, at least two placement areas for the recording medium are prepared within the device body, and each placement area includes a driving means for rotating the recording medium. are provided, and are equipped with an optical head that can be moved in common over these placement areas.

[Function] Therefore, in such a configuration, since the optical head can be shared, the two functional parts for recording, reproducing, or erasing information can be compactly combined at low cost, and the configuration can be simplified. .

[Example] Hereinafter, an example of the present invention will be specifically described with reference to the drawings. In FIG. 1, two disc-shaped recording media 1a and 1b for performing magneto-optical recording, reproduction, etc. are included in the main body 2 of the optical information recording and reproducing apparatus according to the present invention.
is installed. In particular, in this embodiment, the recording medium 1a is housed in a conventionally known cartridge (see FIG. 6). Further, the recording medium 1b is a fixed piece of equipment that cannot be taken out or taken out from the apparatus main body 2.

Also, in the main body of the apparatus, there is a 1 shared by the recording medium.
Two optical heads 4 are arranged. That is, the recording media 1a and lb are held by respective turntables of spindle motors 6a and 6b having spindle axes parallel to each other, and the spindle motors are mounted on a base 1O. The recording surfaces of each recording medium are arranged on the l plane, and the optical head 4 can move along a guide rail 8 arranged parallel to this. In the above embodiment, magnetic heads 5 as modulated magnetic field generating means are arranged corresponding to each recording medium for magneto-optical recording and reproduction.

In the above embodiment, since the optical head 4 seeks in the horizontal direction, even if the shutter 11 of the cartridge 7 for the recording medium 1a is opened from the cartridge body 12, the optical head 4 may interfere. Therefore, it is particularly advisable to cut out the opening as shown in FIG. In the above embodiment, the recording medium 1b may be placed in the main body of the apparatus as it is, but it may be housed in a predetermined cartridge 7 to prevent dust.

Alternatively, as shown in FIG.
The base lO may be moved up and down with respect to the fixed base 9 so as to move the recording surface of the recording medium toward and away from the base (or the turntable may be moved up and down).
In this case, since the optical head 4 moves toward and away from the recording surface, the recording medium is stored in the cartridge 7 having a normal opening, and the optical head can access the recording surface by opening the shutter. It goes without saying that the special cartridge 7 used in the first embodiment in which the recording medium is housed may also be used here.

Further, it is preferable that the optical head 4 used here has a configuration not unlike that shown in FIG. 9, but not as shown in FIG. That is, in the configuration shown in FIG. 8, since the optical head is long in the theta direction, when accessing the recording surface with the objective lens, the optical head itself is moved by one of the spindle motors 34.
However, if the width of the optical head is short in the theta direction as shown in FIG. 9, this can be avoided. For this reason, 1. For example, as shown in FIG. 9, the laser 41, collimator lens 42, and objective lens 44 may be arranged in the same manner as before.
It is preferable to attach a mirror 54 to the polarizing beam splitter 53 for bending the beam in the theta direction. In this embodiment, the condenser lens 45 and the polarizing beam splitter 4
6.47. The servo sensor 48, RF sensor 49, etc. may be configured as conventionally.If the mirror 54 is bonded to the polarizing beam splitter 53, the theta direction can be shortest.

In the above embodiment, the mirror is placed on the left side of the polarizing beam splitter 53, but the mirror may be placed on the polarizing beam splitter 54 as shown in FIG. 10, for example.

In the embodiment shown in FIGS. 11 and 12, the recording media (optical disks) la and 1b installed in the device main body 2 are inserted into and exited from the device main body through inserts 013a and 13b provided in the device main body. It can be loaded freely. For this reason, cartridges 7a, 7 for recording media
The shutters 11a and 11b are provided with notches 13 at opposite positions so as to be selectively accessed in correspondence with the common optical head 4, and the shutters 11a and 11b are also designed with this in mind.
Must be configured. Note that the shutter may be opened and closed manually.

In the embodiment shown in FIG. 13, the recording media [a and 1b] stored in the device main body 2 are equipped with cartridges 7a and 7b that can be taken in and out of the device main body 2, and their configuration is also similar to that shown in FIG. It is similar to that shown in FIG. However, in this embodiment, a tray 14 is used to load the cartridge into the apparatus main body 2. Each cartridge is set in the tray 14 at a predetermined position, and this tray is loaded from the insertion port I3 provided in the main body 2 of the apparatus.
It is driven by a spindle motor.

The dual drive system of the optical information recording/reproducing apparatus having such a configuration will be specifically explained with reference to FIG. 14. In addition, here, the code 101% 104 is a disk-shaped recording medium, and the spindle motor 102.105
The spindle motor is rotated by a drive circuit 103,
The drive is controlled at 106. The optical head employed here is a so-called separation optical system, which includes a movable optical system 108 that includes an objective lens and a means for finely controlling the objective lens, and a carriage on which the movable optical system 108 is mounted using a moving means such as a linear motor. , a fixed optical system 1 that arranges and configures other optical components
Consists of 09.

Moreover, a modulated magnetic field generating means 115[deg.]16 for recording and erasing information is arranged on the recording medium 101, 104. Here, a bias magnet is used as the modulation magnetic field generating means, and although one is provided corresponding to each recording medium, it is also possible to use one long bias magnet corresponding to one recording medium, or the above-mentioned A small magnet that moves with the movable optics may also be used. A signal is output from the drive circuit 111 to this modulated magnetic field generating means. In addition, in this embodiment, a servo circuit for controlling the movable optical system 108 and the above-mentioned moving means] 4. Control signal circuit +10 for the laser and photodetector of the fixed optical system and for the drive circuit I11
, an interface 112 for connecting to an external device via a connector 117, a power supply circuit 119 connected to an external power source via a connector 118, and a control circuit 113 for controlling the entire system.

The above interface 1]2 is shown in Figure 15 and 1.
The configuration shown in Figure 6 is adopted.

In the former, two sets of address setting circuits ADH-1-〇~2,
ADR-2-0~2 are provided, each with 0~
ADR#1 and ADH$2 having a value of 7 (3 bits) are set. Connector 11 for external systems
7 signals 5I01, ~5IGZ, and ADROll, 2 of these interfaces 0 to 7 (3
bit). Here, the system determines the address determination mode using the dry switch 5ELECT-SW-1.

The algorithm of this system will be explained with reference to the flowchart in FIG. Here, there is a mode in which two recording media are used as one logical (but physical from the host system's perspective) disk drive, and a mode in which they are used as two disk drives. Furthermore, regarding the latter, it is assumed that there are two modes: using consecutive logical addresses and setting them independently.

However, after the system starts, 5ELECT-3W
The output of -1 determines whether the mode uses two addresses (that is, apparently the upper two drives). If there is one, it is determined whether the address matches the address (ADH#]) determined by ADH-1-0 to ADH-2.

If they do not match, it is assumed that this drive is not being used, and the process is terminated. If they match, the logical address (external logical sector number) within the recording medium specified by the external system is used. Determine. Now, RAN the logical address range of the first disk (recording medium).
Set it as GE-1, set the second one as RANGE-2, and set it as 2.
Assuming that the disk is a continuous recording medium following the first disk, and the range of the logical address of the second disk is RANGE-3, if the logical address is within RANGE-1, the first disk is specified. Therefore, select the first drive and proceed to the following process. Also, the logical address is RA
In the case of NGE-3, since the second disk is specified, select the second (second) drive and process the disk here.However, in this case, Since the address is specified as following the first disk, subtract the offset and convert it to a logical address in the second drive. If it is not included in either, it is an error. , 0th order to end the process, 2
If two different addresses are used, compare the drive's address with ADH$1. Here, if they match, test whether the logical address is within the above RANGE-1, and as in the case above, if it is outside the range, it will be treated as an error, if it is within the range, select the first disk, and perform the following process. In other words, if there is a mismatch with ADR #1, then ADR #
Compare with 2. Here, if there is a mismatch, this drive is not in use, so the process ends. If it matches ADH #2, the logical address is compared with RANGE-2, and if it is outside the range, it is an error, and if it is within the range, the second disk is selected and processed. Note that when there is no disk to be used, necessary error processing is performed in almost the same way as with two independent drives. However, in the above-mentioned mode using one address, if only one of the disks cannot be used, only a portion of the drive will be unusable, so corresponding processing is required on the host side.

Next, another example will be explained with reference to FIGS. 16 and 18. In the above embodiment, two addresses are defined independently, but in this example, the address corresponding to ADH#2 in the previous example is defined as ADR#1+1 (However, if ADH#1=7, ADH It is preferable to set $2=O). Naturally, other methods such as ADR#I+2 or ADH#I-1 may also be used. Although this method reduces the degree of freedom of ADH#2, it is possible to reduce the number of switches by the number of address bytes.

Of course, you can input the difference in addresses or change ADH #2 to ADR.
A method such as sending it from the host as a command to $1 may also be used.

This case is otherwise similar to the previous case.

[Effects of the Invention] The present invention has been described in detail above, and since one shared optical head is disposed within the apparatus main body and allows selective access to a plurality of recording media, it is possible for the host side to control allows for continuous recording and playback, or provides versatility such as the ability to copy information from one recording medium to another with one device, and the functionality of multiple devices. This can be achieved with one device having a relatively simple configuration.

[Brief explanation of the drawing]

Fig. 1 is a configuration diagram showing the basic parts of the present invention, Fig. 2 is a schematic side view thereof, Figs. 3 (a) and (b) are perspective views showing the shutter open and closed states, and Fig. 4 is a schematic side view. Enlarged side view, No. 5
The figure is a side view showing another embodiment, FIG. 6 is a perspective view of the cartridge in that case, FIG. 7 is a perspective view showing the specific configuration of the conventional example, and FIG. 8 is the optical system used therein. System configuration diagram,
9 and 10 are configuration diagrams showing each embodiment of an optical system according to the present invention, FIG. 11 is a perspective view showing another embodiment of the present invention, FIG. 12 is a side view of the same, and FIG. 13 14 is a perspective view showing still another embodiment, FIG. 14 is a configuration diagram showing a dual system of the present invention, FIGS. 15 and 16 are configuration diagrams of each embodiment showing the configuration of an interface used therein, and FIG. 1
7 and 18 are flowcharts showing those algorithms. 1a, lb,... Recording medium (optical disk) 260. Apparatus main body 40.2 optical head 509. Modulated magnetic field generating means 6a, 6b, . . . spindle dryer 700. Cartridge 8°, guide rail + 1. , , shutter +2. ,,cartridge body

Claims (1)

[Claims] 1. In an optical information recording/reproducing device that records, reproduces, or erases information optically or magneto-optically by irradiating a light beam onto a disk-shaped recording medium, At least two placement areas for the recording medium are prepared, and each placement area is provided with a drive means for rotating the recording medium, and is equipped with an optical head that can commonly seek across these placement areas. An optical information recording/reproducing device characterized by: 2. A claim characterized in that at least one of the recording media is fixedly disposed within the apparatus main body, and the other is arranged such that it can be moved in and out of the apparatus main body. Item 1. The optical information recording and reproducing device according to item 1. 3. The optical information recording and reproducing device according to claim 1, wherein the recording medium is configured to be able to be freely entered and exited from the apparatus main body through separate entrances and exits provided in the apparatus main body. Device. 4. The optical information recording and reproducing apparatus according to claim 1, wherein the recording medium is configured to be able to enter and exit the apparatus main body from a common entrance provided in the apparatus main body. . 5. The optical information recording/reproducing apparatus according to claim 1, wherein the recording medium is housed in a cartridge having an opening facing the seek area of the optical head. 6. The optical information recording and reproducing apparatus according to claim 1, wherein the driving means for rotating the recording medium is configured to be able to move the recording medium in the direction of a rotation axis.