JPH1173670A - Optical information recorder and optical information recording method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To detect the fault of a recording operation by detecting whether a recording layer is irradiated with a recording beam of prescribed intensity or not during the recording operation by the quantity of the reflected light from an optical storage medium. SOLUTION: A peak detecting circuit 5 of an optical disk device inputs the photoelectrically converted signal supplied from a photodetector 8 receiving the reflected light from the optical disk irradiated with the recording beam from a semiconductor laser oscillator to the non-inversion input side of a comparator 51 where the signal is processed by using the comparator 51, a diode 53, a capacitor 54, a resistor 55 and a comparator 52. The processed output signal from the comparator 52 is outputted to a CPU 23. The CPU 23 provides the output signal with a prescribed management width and announces the output fault of the recording beam from the semiconductor laser oscillator when the signal deviates for the prescribed time or above from the management width.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical information recording device such as an optical disk device for recording information on an optical disk composed of a plurality of tracks in a radial direction, and an optical information recording method.

[0002]

2. Description of the Related Art In a conventional optical information recording apparatus such as an optical disk apparatus, whether or not a recording beam of a predetermined intensity is irradiated during recording is determined by the intensity of reflected light from an optical recording medium such as an optical disk. Instead, a part of the output beam from the light emitting element is detected using a light amount detector, or the light emitting element itself is detected using a built-in light emission amount detecting detector, or a recording beam is used during recording. Either did not have means for detecting intensity.

As described above, in an optical information recording apparatus, whether or not a recording beam having a predetermined intensity is irradiated to a recording layer during a recording operation is not detected based on the intensity of light reflected from an optical recording medium. Was.

[0004] Even if the recording beam output of the light emitting element does not fluctuate, contamination of an optical system such as an objective lens in an optical head can be improved.
Alternatively, the intensity of light on the recording layer of the optical information recording medium may fluctuate due to contamination on the surface of the optical information recording medium. In this case as well, as in the case where the recording output of the light emitting element has changed, the recording mark cannot be formed normally, so that the recording cannot be performed normally. However, this abnormality cannot be detected.

[0005]

As described above, in an optical information recording apparatus such as an optical disk apparatus, it is determined whether or not a recording beam having a predetermined intensity is irradiated on a recording layer during a recording operation from an optical recording medium. Optical information recording due to contamination of the optical system of the optical head or the surface of the optical information recording medium even if the recording output of the light emitting element does not fluctuate. The intensity of light on the recording layer of the medium may fluctuate. In this case as well, recording marks cannot be formed normally, so that there is a problem that normal recording cannot be performed. However, this problem cannot be detected. there were.

Therefore, according to the present invention, it is possible to detect whether or not a recording beam having a predetermined intensity is irradiated on a recording layer during a recording operation, based on the amount of light reflected from an optical recording medium. An object of the present invention is to provide an optical information recording device and an optical information recording method capable of detecting.

[0007]

An optical information recording apparatus according to the present invention is an optical information recording apparatus for recording information on an optical information recording medium, the information being recorded during the operation of recording information on the optical information recording medium. The detecting means comprises detecting means for detecting the amount of reflected light from the optical information recording medium, and determining means for determining whether or not the amount of reflected light detected by the detecting means is within a predetermined management value.

An optical information recording apparatus according to the present invention is an optical information recording apparatus for recording information on an optical information recording medium, wherein the optical information recording medium is recorded while the information is being recorded on the optical information recording medium. Detecting means for detecting the amount of reflected light from the detector; determining means for determining whether or not the amount of reflected light detected by the detecting means is within a predetermined management value; And an informing means for informing the information when it is determined to be outside.

An optical information recording apparatus according to the present invention is an optical information recording apparatus for recording information on an optical information recording medium, comprising: means for generating light for recording information on the optical information recording medium; First detecting means for detecting the output of the light generated by the means, and the optical means during a recording operation for irradiating the optical information recording medium with the light generated by the generating means to optically record information. Detecting means for detecting the amount of reflected light from the objective information recording medium, determining means for determining whether or not the amount of reflected light detected by the second detecting means is within a predetermined management value, An abnormality detection and identification means for detecting and identifying an abnormality based on the determination of the means and the light output detected by the first detection means.

An optical information recording apparatus according to the present invention is an optical information recording apparatus for recording information on an optical information recording medium, comprising: means for generating light for recording information on the optical information recording medium; First detecting means for detecting the output of the light generated by the generating means, light guiding means for guiding the light generated from the generating means to the optical information recording medium, and light for guiding the light guided by the light guiding means to the optical information recording medium. Detecting means for detecting the amount of reflected light from the optical information recording medium during a recording operation of irradiating the optical information recording medium with information and optically recording information; Determining means for determining whether or not the values are within the control value, and generating means, light guiding means, and the optical information recording medium based on the determination by the determining means and the light output detected by the first detecting means. Abnormality detection and awareness And a abnormal detection identifying means for performing.

An optical information recording method according to the present invention is an optical information recording method for optically recording information on an optical information recording medium, wherein the information is recorded during the operation of recording information on the optical information recording medium. The amount of reflected light from the optical information recording medium is detected, and it is determined whether or not the detected amount of reflected light is within a predetermined management value.

An optical information recording method according to the present invention is an optical information recording method for optically recording information on an optical information recording medium, wherein the information is recorded during the operation of recording information on the optical information recording medium. The amount of reflected light from the optical information recording medium is detected, it is determined whether the detected amount of reflected light is within a predetermined management value, and when the amount of reflected light is determined to be outside the predetermined management value, the It is characterized by reporting information.

An optical information recording method according to the present invention is an optical information recording method for optically recording information on an optical information recording medium, comprising: generating light for recording information on the optical information recording medium; The output of the generated light is detected, and the amount of light reflected from the optical information recording medium is detected during a recording operation of irradiating the generated light to the optical information recording medium to optically record information. Then, it is characterized in that it is determined whether or not the detected reflected light amount is within a predetermined management value, and abnormality detection and identification are performed based on the determination and the detected light output.

An optical information recording method according to the present invention is an optical information recording method for optically recording information on an optical information recording medium by guiding light generated by a generating means by a light guiding means. Detecting the output of light generated by the means, detecting the amount of reflected light from the optical information recording medium during a recording operation of recording information on the optical information recording medium, and detecting the detected amount of reflected light. It is determined whether or not the value is within the control value, and from this determination and the detected light output, the generation unit, the light guide unit, and the detection and identification of abnormality of the optical information recording medium are performed. Features.

[0015]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 2 shows an optical disc device according to the optical information recording device of the present invention. This optical disk device is an optical disk (information recording medium)
Recording and reproduction of information are performed on the light-emitting device 1 using focused light.

The optical disk 1 is rotated by a motor 2 at a constant speed, for example. The motor 2 is controlled by a motor control circuit 18. Recording and reproduction of information on and from the optical disk 1 are performed by the optical head 3. The optical head 3 is fixed to a drive coil 13 constituting a movable part of a linear motor 31, and the drive coil 13 is connected to a linear motor control circuit 17.

A linear motor position detector 26 is connected to the linear motor control circuit 17. The linear motor position detector 26 detects the optical scale 25 provided on the optical head 3, and It is designed to output a signal.

The fixed portion of the linear motor 31 is provided with a permanent magnet (not shown).
Is excited by the linear motor control circuit 17 so that the optical head 3 is moved in the radial direction of the optical disc 1.

An objective lens 6 is held on the optical head 3 by a wire or a leaf spring (not shown). The objective lens 6 is moved by a drive coil 5 in the focusing direction (the direction of the optical axis of the lens) and is driven. The coil 4 can move in a tracking direction (a direction orthogonal to the optical axis of the lens).

The laser light generated by the semiconductor laser oscillator (or argon neon laser oscillator) 9 driven by the laser control circuit 14 is applied to the optical disk 1 via the collimator lens 11a, the half prism 11b, and the objective lens 6. The reflected light from the optical disc 1 is guided to the photodetector 8 via the objective lens 6, the half prism 11b, the condenser lens 10a, and the cylindrical lens 10b.

The laser light of the semiconductor laser oscillator 9 is monitored by the photodiode PD, converted into an electric signal, and fed back to the laser control circuit 14 to stabilize the laser light output of the semiconductor laser oscillator 9.

The photodetector 8 comprises a four-divided photodetection cell 8
a, 8b, 8c and 8d. The output signal of the photodetection cell 8a of the photodetector 8 is an amplifier 12a
Is supplied to one end of the adder 30a via the
b is supplied to one end of the adder 30b via the amplifier 12b, and the output signal of the photodetector cell 8c is supplied to the other end of the adder 30a via the amplifier 12c. The signal is supplied to the adder 3 via the amplifier 12d.
0b is supplied to the other end.

The output signal of the photodetector cell 8a of the photodetector 8 is supplied to one end of an adder 30c via an amplifier 12a, and the output signal of the photodetector cell 8b is supplied to the adder 30d via an amplifier 12b. The output signal of the photodetection cell 8c is supplied to one end, and the output signal of the photodetection cell 8c is supplied to the other end of the adder 30d via the amplifier 12c.
The signal is supplied to the other end of the adder 30c via d.

The output signal of the adder 30a is supplied to an inverting input terminal of a differential amplifier OP2.
Is supplied with the output signal of the adder 30b. Thus, the differential amplifier OP2 supplies a signal related to the focus point to the focusing control circuit 15 according to the difference between the adders 30a and 30b. The output signal of the focusing control circuit 15 is
The laser beam is supplied to the focusing drive coil 5 and is controlled so that the laser beam is always just focused on the optical disc 1.

The output signal of the adder 30c is supplied to the inverting input terminal of the differential amplifier OP1.
Is supplied with the output signal of the adder 30d. As a result, the differential amplifier OP1 supplies a track difference signal to the tracking control circuit 16 according to the difference between the adders 30c and 30d. The tracking control circuit 16 creates a track drive signal according to the track difference signal supplied from OP1.

The track drive signal output from the tracking control circuit 16 is supplied to the drive coil 4 in the tracking direction. The track difference signal used in the tracking control circuit 16 is supplied to a linear motor control circuit 17.

Each of the light detection cells 8a, 8a, 8b, 8c, 8d of the photodetector 8 in the state where the focusing and tracking have been performed as described above.
Adder 30e to which the sum signal of the outputs of 8d, that is, the output signal of the adder 30c and the output signal of the adder 30d are supplied
Output signal reflects a change in reflectance from pits (stored information) formed on the track.

This output signal is supplied to a peak detection circuit 50, which outputs the optical disk 1
The amount of reflected light (reflected light intensity) is detected. The output signal is supplied to a recording signal reproducing circuit 40, where the address information (track number, sector number, etc.) as preformat data is recorded.
Etc. and stored information are reproduced.

The recording signal reproducing circuit 40 has a P signal for reproducing a signal read from the optical disk 1 therein.
It has an LL circuit 40a. The PLL circuit 40a generates a clock signal synchronized with the input data signal,
It is supplied to PU23.

When the tracking control circuit 16 moves the objective lens 6, the linear motor control circuit 17 controls the linear motor 31, that is, the optical motor 31 so that the objective lens 6 is positioned near the center of the optical head 3. Head 3
Is to be moved.

The optical disk device has a focusing control circuit 15 and a tracking control circuit 1 respectively.
6. A D / A converter 22 used for exchanging information between the linear motor control circuit 17 and the CPU 23 is provided. Further, a memory 24 for temporarily storing reproduction data and recording data or storing a program for performing a predetermined operation is provided.

The laser control circuit 14, focusing control circuit 15, tracking control circuit 16, linear motor control circuit 17, motor control circuit 18, recording signal reproduction circuit 40, and the like are controlled by the CPU 23 via the bus line 20. It has become.

A host computer 70 is connected to the optical disk device through an alarm lamp 60 and a predetermined communication line. FIG. 1 shows a schematic configuration of a peak detection circuit 50 of the above-described optical disk device according to the present invention, which is composed of comparators 51 and 52, a diode 53, a capacitor 54, and a resistor 55. The peak detection circuit 50 configured as described above includes the photodetector 8
The signal from the adder 30e to which the four signals from the respective light detection cells 8a, 8d corresponding to the amounts of light reflected from the optical disk 1 received by the respective light detection cells 8a, 8d to 8d are input to the comparator 51. , And outputs the processed output signal from the comparator 52.

In the peak detecting circuit 50 of this embodiment, each of the photodetecting cells 8a, 8a to 8 of the photodetector 8 as a quadrant detector for receiving the reflected beam from the optical disk 1 is used.
Although the signal from the adder 30e obtained by adding the four signals from d is used, a signal obtained by adding one or some of the four signals may be used.

Next, the operation of the peak detection circuit 50 according to the present invention in such a configuration will be described with reference to FIG. First, in optical information recording in the optical disk device, information is recorded by intermittently irradiating strong light (write beam) while performing tracking and focusing with a read beam from the semiconductor laser oscillator 9.

In the tracking and focusing, the light beams reflected from the functional film surface of the optical disk 1 at the time of irradiating the read beam to the optical disk 1 are received by the respective light detection cells 8a to 8d of the photodetector 8, and each of the photoelectrically converted light is received. Photodetection cell 8
a, .about.8d.

In this embodiment, even when a light beam is irradiated from the semiconductor laser oscillator 9, the reflected beam on the functional film surface of the optical disk 1 is incident on each of the photodetection cells 8a to 8d of the photodetector 8, so that the recording operation is performed. Each light detection cell 8 of the inside light detector 8
a, a predetermined control width is provided to the output signal obtained by processing the signal from the adder 30e obtained by adding the four signals received and photoelectrically converted by .about.8d by the peak detection circuit 50, and the control width When the distance deviates from the predetermined time by more than a predetermined time, a warning lamp 60 or a communication means such as sending a warning signal to the host computer 70 is used to notify the user of the device abnormality (abnormal beam output).

FIG. 3A shows a signal from the adder 30e in which the output of the recording beam from the semiconductor laser oscillator 9 is in a normal state, that is, the reflected light amount from the optical disk 1 received by the photodetector 8. This shows the state (normal) within the management value provided with the upper management value and the lower management value.

FIG. 3B shows the signal from the adder 30e when the output of the recording beam from the semiconductor laser oscillator 9 is reduced, that is, the reflected light amount from the optical disk 1 received by the photodetector 8. This shows a state (abnormal) in which the output is lower than that of the lower control value where the upper control value and the lower control value are provided.

FIG. 3C shows an output signal obtained by processing the peak detection circuit 50. The output signal indicated by the solid line A is in a normal state, and the output signal indicated by the dotted line B is shown. Is an abnormal state lower than the management range.

That is, the CPU 23 in the present embodiment
Is the output signal from the peak detection circuit 50 on the bus line 2.
0, and when it deviates from a predetermined management width for a predetermined time or more, the alarm lamp 60 or a means for transmitting an alarm signal to the host computer 70 informs the user of an abnormality in the device, that is, from the semiconductor laser oscillator 9. To inform the abnormal recording beam output.

The CPU 23 uses the conventional detection method, that is, the detection using the photodiode PD for monitoring the beam (laser light) generated by the semiconductor laser oscillator 9, so that the semiconductor laser oscillator as the light emitting element is used. 9 can be identified and detected as an abnormality caused by the deterioration of the optical system of the optical head 3 or the contamination of the optical disk 1, and the user can properly detect the abnormality of the optical head 3 or the optical disk 1 of the optical disk apparatus. The maintenance method can be notified.

The identification method by the CPU 23 is as follows. 1. When both the beam output from the semiconductor laser oscillator 9 and the amount of reflected light (reflected light intensity) during recording fluctuate: It is determined that the light emitting element (including the semiconductor laser oscillator 9 and the drive system) has deteriorated. 2. When only the amount of reflected light (reflected light intensity) during recording changes: contamination of the optical system of the optical head 3 or the optical disk 1
Identify the dirt.

As described above, according to the embodiment of the present invention, not the fluctuation of the recording output of the light emitting element but the contamination of the optical system in the optical head or the contamination of the optical disk (optical information recording medium). It is possible to detect an abnormality in which the intensity of light on the recording layer of the (optical information recording medium) fluctuates.

Further, it is possible to identify and detect an abnormality caused by deterioration of the performance of the light emitting element, a stain on the optical system of the optical head, or an stain on the optical disk. It is possible to notify a proper maintenance method of the optical disk (optical information recording medium).

[0046]

As described in detail above, according to the present invention,
Optical information recording that can detect whether or not a recording beam of a predetermined intensity is irradiated on the recording layer during the recording operation based on the amount of reflected light from the optical recording medium, and can detect abnormality in the recording operation. An apparatus and an optical information recording method can be provided.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a schematic configuration of a peak detection circuit.

FIG. 2 is a diagram showing an optical disc device according to the optical information recording device of the present invention.

FIG. 3 is a diagram for explaining an input signal and an output signal in a peak detection circuit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Optical disk 4 ... Optical head (light guide means) 8 ... Photodetector (detection means) 8a, 8b, 8c, 8d ... Photodetection cell 9 ... Semiconductor laser oscillator (generation means) 20 ... Bus line 23 ... CPU (determination means) 30e, adder 50, reflected light amount detection circuit (detection means) 51, 52, comparator 53, diode 54, capacitor 55, resistor 60, alarm lamp (notification means) 70, host computer (notification means) PD… photodiode

Claims (8)

[Claims] 1. An optical information recording apparatus for recording information on an optical information recording medium, comprising: detecting an amount of light reflected from the optical information recording medium during an operation of recording information on the optical information recording medium. An optical information recording apparatus, comprising: means for determining whether the amount of reflected light detected by the detecting means is within a predetermined management value. 2. An optical information recording apparatus for recording information on an optical information recording medium, comprising: detecting a quantity of light reflected from the optical information recording medium during an operation of recording information on the optical information recording medium. Means for determining whether or not the amount of reflected light detected by the detecting means is within a predetermined management value; and when the determining means determines that the amount of reflected light is out of the predetermined management value, An optical information recording device, comprising: a notifying unit for notifying information. 3. An optical information recording apparatus for recording information on an optical information recording medium, comprising: a generating means for generating light for recording information on the optical information recording medium; and an output of light generated by the generating means. First detecting means for detecting the amount of light reflected from the optical information recording medium during a recording operation of irradiating the optical information recording medium with light generated by the generating means and optically recording information. Detecting means for detecting whether or not the amount of reflected light detected by the second detecting means is within a predetermined management value; and determining by the determining means and the first An optical information recording apparatus, comprising: an abnormality detection and identification unit configured to detect and identify an abnormality from the light output detected by the detection unit. 4. An optical information recording apparatus for recording information on an optical information recording medium, comprising: means for generating light for recording information on the optical information recording medium; First detecting means for detecting an output, light guiding means for guiding light generated from the generating means to the optical information recording medium, and irradiating the optical information recording medium with light guided by the light guiding means. Second detecting means for detecting the amount of reflected light from the optical information recording medium during a recording operation for optically recording information; and determining whether the amount of reflected light detected by the detecting means is within a predetermined management value. Determining means for determining whether or not the generating means, the light guiding means, and the optical information recording medium are abnormal based on the determination by the determining means and the optical output detected by the first detecting means. Abnormality detection identification means; An optical information recording device comprising: 5. An optical information recording method for optically recording information on an optical information recording medium, the method comprising: recording information on the optical information recording medium during reflection of the information from the optical information recording medium during an operation of recording the information on the optical information recording medium. An optical information recording method, comprising detecting a light quantity and determining whether or not the detected reflected light quantity is within a predetermined management value. 6. An optical information recording method for optically recording information on an optical information recording medium, wherein the reflection from the optical information recording medium during the operation of recording information on the optical information recording medium. Detecting the amount of light, and determining whether the detected amount of reflected light is within a predetermined management value,
An optical information recording method, wherein when the reflected light amount is determined to be outside a predetermined management value, the information is reported. 7. An optical information recording method for optically recording information on an optical information recording medium, comprising: generating light for recording information on the optical information recording medium; and outputting an output of the generated light. Detecting the amount of light reflected from the optical information recording medium during a recording operation of optically recording information by irradiating the generated light on the optical information recording medium; and detecting the detected reflected light amount. Is determined to be within a predetermined control value, and an abnormality is detected and identified based on the determination and the detected light output. 8. An optical information recording method for optically recording information on an optical information recording medium by guiding light generated by a generating means by a light guiding means, wherein an output of the light generated by the generating means is provided. During the recording operation of recording information on the optical information recording medium, detecting the amount of reflected light from the optical information recording medium, and determining whether the detected amount of reflected light is within a predetermined management value. And an optical information recording method characterized by detecting and identifying an abnormality of the generating means, the light guiding means, and the optical information recording medium from the determination and the detected light output. .