JPS61160854A - Optical information recording and reproducing device - Google Patents

Abstract

PURPOSE:To improve the working efficiency of an information adjusting device by using a photomagnetic thin film to form a single side of a 2-sided disk and a postscript type thin film to form the other side of the disk and providing the optical head units of the same constitution on both sides of the disk. CONSTITUTION:A 2-sided disk 1 contains a photomagnetic thin film side 2 and a postscript type recording side 3, and the upper and lower optical heads 81 and 82 of the disk 1 have the same constitution. A disk type detecting part 4 detects various types of disks including a ROM disk, a DRAW disk, an E- DRAW disk, etc. and sendsthe signals showing these types to a disk controller 5. The controller 5 controls totally a disk device and gives an indication to a laser modulation circuit 6 for the laser power corresponding to the type of the disk. Thus the powre of a semiconductor laser 10 is controlled. While the signal given from a photoreceptor 16 is processed by a signal processing circuit 17. Then the focus tracking is controlled by a focus tracking control circuit 14. Thus the working efficiency of an information adjusting device is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an optical disc device, particularly an optical information recording/reproducing device for recording or reproducing information using a double-sided disc.

[Prior Art] A conventional double-sided disc is composed of the same type of disc on each side. Examples include a y4-side recordable disc, a double-sided read-only disc, and a double-sided rewritable disc.

Incidentally, in recent years, efforts have been made to make offices paperless and use space more effectively by using electronic filing devices using optical disks.

When a conventional type L double-sided optical disc is used.

Due to its large capacity, it is possible to go paperless and use space effectively.

However, once a DRAW disc has been recorded, it cannot be rewritten and used in the same location, so if even temporary information is recorded, a large number of recorded discs will be created, which goes against the effective use of space. , there is a problem that it is not resource-saving.

On the other hand, E-DRAW discs have problems with their storage stability. For example, it is difficult to withstand storage for 20 to 30 years, and there is a problem that it is not suitable for long-term storage due to its inherent rewritability.

ROM disks cannot originally record data.

There is a problem in that it has to be used within a limited range as a disk for information files.

[Object of the Invention] The present invention can achieve both resource saving (space saving) and storage stability. The purpose is to provide an efficient information organization device.

[Embodiments of the Invention] FIG. 2 is a longitudinal sectional view of a disk used in the present invention.

The double-sided disk 1 has an E-DRAM recording surface 2 and a DRAW magneto-optical thin film surface (hereinafter referred to as an E-DRAW recording surface) 2 and a write-once recording surface (hereinafter referred to as a DRAW recording surface) 3.
Recording and recording are made separately using known techniques, and can be easily assembled by pasting together in the same way as conventional double-sided discs.

FIG. 1 is a block diagram showing one embodiment of the present invention.

In FIG. 1, the optical helad 9 includes a laser light source 10, a collimator lens 11 that converts the light beam from the light source 10 into parallel light, a beam splitter 12, and an objective lens 13. The objective lens 13 is the disk 1
It is movable in both directions of arrow A for focusing the light beam during recording/erasing and reproduction, and in both directions of arrow B for tracking the laser beam during reproduction.

Further, the optical helad 9 includes a condenser lens 24, an analyzer 15 used only when reproducing information, a light receiving element 16, and a signal processing circuit 17.

As the autofocus and autotracking methods, the well-known astigmatism method, 3-beam method, etc. may be used, so a detailed explanation will be omitted. The spindle motor 18 rotates the disk 1 mounted on the turntagol 25 by a clamp 26.

Disk type (i.e. ROM disk.

The disk type detection unit 4, which detects disk types such as DRAW disks and E-DRAW disks, sends a signal indicating the disk type to the disk controller 5. The disk controller 5 controls the entire disk device and detects the disk type. It also has the role of instructing the laser modulation circuit 6 about the laser power according to the type, and thereby the power of the semiconductor laser 10 can also be controlled.

Further, the signal from the light receiving element 16 is processed by the signal processing circuit 17, and the focus tracking control circuit 14 controls focus tracking based on the signal, and the gain of the focus tracking am circuit 14 is adjusted according to the laser output. can be switched.

In FIG. 2, the optical head unit 81 on the E side of the disk 1 has exactly the same configuration as the optical head unit 82 shown on the F side of the disk I in the figure. Note that a separate head access mechanism is required to move the optical heads 9 and 9° in the radial direction of the disk 1, respectively. As this head access mechanism, a known linear motor or the like may be installed independently at each optical head 9.9°, or a single common linear motor may be used with the optical head 9.9° as a body. Furthermore, a mark corresponding to the surface is attached to the cartridge containing the double-sided disc 1 according to the disc, and the disc noodle detection section 4 is constituted by a sensor that reads the mark optically or mechanically.

Next, the operation of the above embodiment will be explained.

FIG. 3 is a flowchart for determining the type of a single-sided disc.

The double-sided disc l is loaded into the disc drive device (
SL), the disk type detection unit 4 instructs the determination of the disk type of the upper surface and the lower surface of the disk 1 (52), receives a type signal from the disk type detection unit (53), and also sends an instruction to the system controller (not shown). The type signal is transmitted (S4), and the disk type is displayed on a system console (not shown) (35).

FIG. 4 is a flowchart of the double-sided disc recording mode.

When the double-sided disc recording mode is set (S l O), the disc controller 5 outputs a signal indicating the disc type, that is, an E-DRAW disc, on each side of the set double-sided disc l, or DR.
A signal indicating that it is an AW disk is sent to the system controller (not shown). A system controller (not shown) calls the operator's attention by displaying the disk type on a display on the operator console. Here, for convenience of explanation, it is assumed that the top surface of the 14-sided disk l is an E-DRAW disk and the F side is a DRAW disk.

The operator specifies temporary recording or permanent recording regarding the storage mode of the optical disk drive device (S l
l) For example, if one image m collection is currently being performed, the operator first selects the temporary storage mode of the optical disk drive device (521), and as a result,
The command is transmitted to the disk controller 5 (
522), the disk controller 5 puts the optical head unit 81 on the second side (in FIG. 2) on standby (S23).
) to generate a control signal. The operator then transfers the sample image data to be edited for one image to the top surface of double-sided disk 1 (E-DRAW disk).
The addresses are recorded one after another (524), and the recording is ended (S25).

That is, the E-DRAW disk surface is used as the working image memory area.

After the easy data of the editing result is finally determined, this image data is permanently recorded. In this case, the operator selects the permanent recording mode as the storage mode of the optical disc drive device (331), and this permanent recording mode is transmitted to the disc controller (332), and the double-sided disc shown in FIG. The optical head unit 82 corresponding to the lower surface of the disk (DRAW disk) starts operating (333), the first editing result data is recorded at a predetermined address (S34), and the recording ends (S35).

In addition, E- used as the working memory area.
After completing the work, the DRAW disk may be designated for erasure if necessary, or it may be erased automatically.

Although not shown in FIG. 2, when a magneto-optical thin film is used as an E-DRAW disk, during recording or erasing,
The bias magnetic field that reverses in the direction perpendicular to the disk surface is several 1O
A known electromagnet or permanent magnet may be used and placed on the opposite side of the optical head across the disk surface, but this will not be described in detail here.

Therefore, depending on whether the data is to be stored temporarily or permanently, the type of disc to be used is automatically selected, thereby ensuring the optimum usage method depending on the recording medium. Furthermore, since each of the two hets corresponds to each side of the disk, time for changing media can be saved. Furthermore, by setting only one meat disk, the system can be operated efficiently with only one external storage device.

In the example, a double-sided disc consisting of an E-DRAW disc and a DRAW disc was described.
With DRAW disc.

The case of a double-sided disk consisting of a ROM disk is also exactly the same as above. In other words, the ROM disk usually has the system's operating system (OS), manual, format, etc. recorded in advance.
In this case, by using the single double-sided disk, the operator can operate the system efficiently.

If an E-DRAW disk is used as a buffer memory, it is advantageous to use it as a LAN e-mail box. In other words, the sent e-mail is automatically recorded on the E-DRAW disk, and the operator can read it later and download it from there as necessary.
This is because it can be saved on a RAW disk.

[Effects of the Invention] According to the present invention, after editing data, the edited result data is stored in a container.

This has the effect that the operator's work efficiency is significantly improved.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention. FIG. 2 is a longitudinal sectional view of a single-sided disc. FIG. 3 is a flowchart for determining the type of double-sided disc. FIG. 4 is a flowchart of the double-sided disc recording mode. l...Double-sided disc, 2...E-DRAW recording surface as an example of the disk surface, 3...
・DRAW recording surface as an example of disk F side, 4...
...Disk type detection unit, 5...Disc controller, 9.9'...Optical head, at,
az・・・・・・Hikari Fudo unit.

Claims (3)

[Claims] (1) A first optical head for recording or reproducing information on one side of the double-sided disc; and a second optical head for recording or reproducing information on the other side of the double-sided disc.
An optical information recording/reproducing device comprising: an optical head; (2) In claim 1, the double-sided disk is an optical information disc characterized in that: the one surface is composed of a magneto-optical thin film, and the other surface is composed of a write-once thin film. Recording and playback device. (3) In claim 1, the one surface is composed of a magneto-optical thin film, this surface is used as a working memory area or a temporary memory area, and the other surface is composed of a write-once thin film, An optical information recording and reproducing device characterized in that this surface is used for transcribing the results of arranging the areas.