JPH10124953A - Recording and reproducing method for recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress crosstalk to an adjacent track by recording/reproducing a test signal to obtain an optimal laser beam pulse width and intensity for recording and recording actual information under this optimal irradiation condition. SOLUTION: A magneto-optical disk is driven so as to position an optical head in the track of a desired address and a magnetic head in the vicinity of this track position. Then, when laser beam pulses P1 to P5 having various recording laser pulse widths are projected, a magneto-optical recording magnetic area is widened and made longer because of the pulse width increase. By tracking a beam spot in its adjacent land, a magneto-optical reproducing signal is produced for leaking-in of rest data. At this time, by using a level for not diving any influence on the adjacent track as a slice level,. a laser pulse width corresponding to a reproducing signal not exceeding the level is set as an optimal recording laser beam pulse width. Under this laser irradiation condition, actual information recording is carried out.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for recording and reproducing information on an information recording medium, and more particularly, to an information recording method capable of accurately controlling a recording element width such as a recording signal pit width and a magnetic domain width.

[0002]

2. Description of the Related Art In recent years, with the development of information technology and the increase in the amount of information, optical memories capable of recording a large amount of information have been used. Magneto-optical recording media have been actively developed as optical memories capable of rewriting recorded information. An optical modulation method and a magnetic field modulation method are known as information recording methods for such a magneto-optical recording medium. In the light modulation method, data is irradiated by irradiating a laser beam modulated according to data to be recorded, while applying a DC magnetic field weaker than the coercive force of the magneto-optical film to a magneto-optical film formed on a substrate. Recording is performed (for example, refer to JP-A-52-23318). In this method, recording is always performed while applying a magnetic field in a fixed direction. Therefore, in order to re-record data in an area where data is recorded, it is necessary to newly record after erasing a recorded portion. That is, this method cannot directly overwrite data.

On the other hand, in the magnetic field modulation method, data is recorded by applying a modulated magnetic field pulsed in accordance with coded data while irradiating a direct current laser beam to the magneto-optical film (for example, see Japanese Patent Application Laid-Open Publication No. H11-163873). (See No. 51-107121). According to this method, the data can be recorded by directly reversing the magnetization direction of the recording medium in accordance with the bit data “0” and “1”. Overwriting can be performed. However, since the laser beam is radiated in a DC manner, the recording mark becomes crescent shaped longer in the laser beam irradiation direction as the linear velocity increases, which is disadvantageous in signal processing. Further, in a region where an external magnetic field is not applied at the time of magnetic field switching, the magnetic domain becomes indefinite, and the S / N
There is a problem in terms of ratio.

As a technique for improving the magnetic field modulation method, Japanese Patent Application Laid-Open No. 1-292603 discloses a magnetic field having a polarity corresponding to recording data while heating a magneto-optical recording medium with a pulse laser beam of a constant frequency synchronized with the recording data. (Hereinafter referred to as an optical magnetic field modulation method). According to this technique, it is shown that the above-mentioned disadvantages of the magnetic modulation method can be solved and a stable recording mark can be obtained.

[0005]

An optical disk, which is representative of a magneto-optical recording medium which is recorded and reproduced by a magneto-optical field modulation system,
On a magnetic disk or the like, the width of a recording pit or a recording magnetic domain becomes wider as the pulse intensity of a laser beam and a magnetic field to be recorded and the pulse width of the laser beam and the magnetic field become larger. If the width of the recording pits or recording magnetic domains is too wide, crosstalk noise between adjacent tracks will occur, causing a reduction in the S / N ratio. Further, in order to meet the demand for high-density recording on an optical recording medium, the track pitch must be further narrowed, and a technique for controlling the width of a recording pit or a recording magnetic domain with higher precision is required.

[0006]

According to a first aspect of the present invention, a recording magnetic field having a polarity corresponding to data is heated while heating a magneto-optical recording medium having grooves and lands alternately with a laser beam. In a magneto-optical recording / reproducing method of recording data as a recording magnetic domain by applying a magnetic field, and reproducing the recording magnetic domain using a magneto-optical effect, a laser beam is a pulse, and the pulse width is changed to various pulse widths. A step of recording test data; and reproducing the adjacent groove portion if the recorded test data is in the groove portion, and reproducing the adjacent groove portion if the test data is in the land portion. A light detecting step of detecting a reproduction signal intensity and obtaining an optimum value of the laser light pulse width based on the level thereof; and a step of performing magneto-optical recording using the obtained laser light pulse width. Recording and reproducing method of the gas-recording medium is provided.

According to a second aspect of the present invention, while heating a magneto-optical recording medium having a groove portion and a land portion alternately with a laser beam, a recording magnetic field having a polarity corresponding to the data is applied. In a magneto-optical recording / reproducing method for recording a magnetic domain as a recording magnetic domain and reproducing the recording magnetic domain by utilizing a magneto-optical effect, wherein the step of recording test data while changing the light intensity of the laser beam to various intensities; If the test data is located in the groove, the adjacent land is reproduced.If the test data is located in the land, the adjacent groove is reproduced.The reproduced signal strength of the test data is detected. A recording / reproducing method for a magneto-optical recording medium is provided, which includes a step of obtaining an optimum value of the light intensity of the laser light and a step of performing magneto-optical recording with the obtained light intensity of the laser light. .

According to a third aspect of the present invention, a recording magnetic field having a polarity corresponding to data is applied while heating a magneto-optical recording medium having wobble pits for tracking by sample servo with a laser beam. In the magneto-optical recording / reproducing method of recording data as a recording magnetic domain by using the magneto-optical effect to reproduce the recording magnetic domain, a laser beam is a pulse, and the test data is changed while changing the pulse width to various pulse widths. And reproducing the intermediate portion between the track where the recorded test data exists and the adjacent track, detects the intensity of the reproduction signal of the test data, and determines the laser light pulse width based on the level thereof. Recording and reproducing method for a magneto-optical recording medium including a step of determining an optimum value of There is provided.

According to a fourth aspect of the present invention, a recording magnetic field having a polarity corresponding to data is applied while heating a magneto-optical recording medium having wobble pits for tracking by sample servo with a laser beam. In the magneto-optical recording / reproducing method of recording data as recording magnetic domains by using the magneto-optical effect to reproduce the recording magnetic domains, a step of recording test data while changing the light intensity of the laser light to various intensities. The intermediate part between the track where the recorded test data is present and the adjacent track is reproduced, the reproduction signal intensity of the test data is detected, and the optimum value of the light intensity of the laser light is determined based on the level. There is provided a method for recording / reproducing a magneto-optical recording medium, comprising a step of obtaining and a step of executing magneto-optical recording by using the obtained light intensity of the laser beam.

In the magneto-optical recording method according to the present invention, the steps prior to the step of performing magneto-optical recording, that is, the steps up to obtaining the laser light pulse width or the steps up to obtaining the light intensity of the laser light pulse are described. It is preferably executed at least one of the time when the operation of the magneto-optical recording apparatus is started and the time when the magneto-optical recording medium is mounted on the magneto-optical recording apparatus.

The object of the present invention is not limited to the above-described magneto-optical recording / reproducing method, but can be generally applied to any recording / reproducing method for an optical recording medium and a magnetic recording medium. That is, the present invention generally relates to a recording medium in which recording areas of a strip-shaped section are used side by side,
A step of obtaining a recording width function of a plurality of test pulse signal element data using the pulse width as a variable in an unrecorded area of the first strip-shaped section; and recording directly in the recording step directly after the recording step. Reproducing the second band-shaped unrecorded area adjacent to the read area, detecting the reproduction signal intensity of the test data obtained in the reproduction step, and determining the optimum pulse width and data based on the pulse width. A recording / reproducing method for a recording medium, comprising: a step of calculating an optimum recording arrangement of data; and a step of executing the optimum pulse width and the optimum recording arrangement of data.

Further, a step of obtaining a recording width function of a plurality of test pulse signal element data using the pulse intensity of the pulse width signal as a variable, and recording in the recording step directly following the recording step. Reproducing a second band-shaped section unrecorded area adjacent to the area; detecting a reproduction signal intensity of the test data obtained in the reproduction step; optimizing the intensity of the test pulse signal from the intensity level; Determining the value;
Performing information recording on the recording medium using the pulse signal of the intensity optimum value.

Further, while the recording / reproducing apparatus continuously performs the operation of recording / reproducing information on / from the recording medium, environmental conditions change every moment. First, after the power supply of the recording / reproducing apparatus is input, the temperature of the recording environment in the recording / reproducing apparatus changes every moment due to heat released from the power supply system. The method of changing the recording environment temperature in the recording / reproducing apparatus differs depending on the temperature environment of the outside atmosphere of the recording / reproducing apparatus. Further, when recording is repeated every other day, the environmental conditions for each recording greatly change. In such an environment, the recording / reproducing apparatus controls the laser beam irradiation temperature to a constant temperature required for recording, and accordingly, the laser is controlled according to the environmental temperature in the recording / reproducing apparatus.
The output of the light is adjusted and controlled. Accordingly, the optimum laser light pulse signal width and the intensity of the laser light pulse signal selected for information recording in the light modulation method are determined by the environmental conditions while the recording / reproducing apparatus continues the recording mode. Test recording is repeated before user recording is performed at necessary time intervals in accordance with the above, and a new optimum laser light pulse signal width and laser light pulse signal are newly generated each time the test recording is performed. The strength must be determined and executed. Such repetition of the laser light output adjustment control and the test recording is the same in the case of the magneto-optical recording medium of the magnetic field modulation recording system.

That is, prior to the recording / reproducing apparatus performing user recording, in a recording medium which is used in a state where the recording areas of the strip-shaped sections are juxtaposed, the recording medium is inserted into the recording / reproducing apparatus and recorded. A recording step of obtaining a recording width function of a plurality of test pulse signal element data using a pulse width as a variable in a strip-shaped section unrecorded area from a point in time when the recording step is set, A reproducing step of reproducing an area adjacent to the recording area by offset tracking in the recording step; and detecting an intensity of a reproduced signal obtained in the reproducing step, and determining an optimum pulse width and data based on the pulse width. A series of steps consisting of an operation step of calculating the optimum recording arrangement of data and an execution step of executing the optimum pulse width and the optimum recording arrangement of data are repeated in this order at regular intervals. Recording medium, including Which is a recording and reproducing method.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 6 shows the contents of a recording / reproducing apparatus system for a magneto-optical recording medium among the recording / reproducing apparatuses used for carrying out the present invention. An outline of recording and reproducing operation of a magneto-optical disk in which wobble pits for performing tracking by a sample servo method are formed in advance by using the apparatus of FIG. 6 will be described. The apparatus includes a laser beam irradiating unit for irradiating the magneto-optical disk 21 with light pulsed at a constant period synchronized with the code data, and a magnetic field applying unit for applying an external magnetic field for recording to the magneto-optical disk 21. And a signal detection unit for detecting a signal from the magneto-optical disk 21. In the laser light irradiation section, the laser 22 is connected to a laser drive circuit 32, and the laser drive circuit 32 controls the laser 22 in response to a clock signal described later from a PLL circuit 39. In the magnetic field application section, the magnetic coil 29 for applying a magnetic field is connected to a magnetic coil drive circuit 34, which receives input data from the encoder 30 through the phase adjustment circuit 31, and controls the magnitude of the applied magnetic field and Controls polarity switching timing. In the signal detection section, the laser 22
Between the first polarizing prism 2 and the magneto-optical disk 21
5 is disposed on the side of the second polarizing prism 251.
And detectors 28 and 281 are arranged. Detector 2
8 and 281 are I / V converters 311 and 3 respectively.
Both are connected to the subtractor 302 and the adder 301 via the line 12. The adder 301 is connected to the PLL circuit 39 via the clock extraction circuit 37, and the subtractor 302 is connected to the decoder 38 via the reproduction signal detection circuit 33.

The operation system for reproducing a recorded signal is as follows. First, in the above-described apparatus configuration, a laser beam for signal reproduction emitted from the laser 22 is made into parallel light by a collimator lens 23 and passes through a polarizing prism 25. The light is focused on the disk 1 by the objective lens 24. The reflected light from the magneto-optical disk 21 is directed to the polarizing prism 251 by the polarizing prism 25, and
, And are split in two directions by a polarizing prism 251. The split light is condensed by a detection lens 27 and guided to photodetectors 28 and 281, respectively. A pit for generating a tracking error signal and a clock signal is formed on the magneto-optical disk 21 in advance. After a reflected light signal from the pit for generating a clock signal is detected by the detectors 28 and 281, a clock extraction circuit 37 is provided. Is extracted by Next, the PLL circuit 39 connected to the clock extraction circuit 37
Generates a data channel clock.

In a recording operation system of test data to be recorded in advance, a laser 22 emits continuous pulse light having a narrow width by a laser driving circuit 32 so as to be synchronized with a data channel clock. The data recording area of the disk 21 is locally heated at equal intervals. Encoder 3
0 generates a data signal of an integral multiple of the reference clock cycle based on the data channel clock generated from the PLL circuit 39. This data signal is sent to the magnetic coil driving device 34 via the phase adjustment circuit 31. The magnetic coil driving device 34 controls the magnetic field coil 29 to apply a magnetic field having a polarity corresponding to the data signal to a laser spot irradiated portion (heated portion) of the data recording area.

After the test recording shown in FIG. 7, the recording / reproducing area 4 of the test recording is reproduced while the tracking center is shifted to the tracking center 6 during reproduction. That is, the recording magnetic domain or pit 8 of the test recording
While irradiating the reproduction light spot 11 with the tracking offset, a reproduction signal for test recording is obtained. Finding the optimal recording conditions in consideration of the test recording playback signal,
When recording user data, recording is performed under optimal recording conditions.

In the magneto-optical recording / reproducing method of the present invention, before actually recording information using the recording / reproducing apparatus shown in FIG. 6, an optimum laser light pulse width or an optimum laser light intensity is checked in advance. Was performed as follows.

[0020]

【Example】

<< Embodiment 1 >> In a magneto-optical recording medium having a groove portion and a land portion alternately, the adjacent land portion is recorded when test data is recorded in the groove portion, and the adjacent land portion is recorded when test data is recorded in the land portion. The groove portion was reproduced, and the reproduced signal intensity of the leakage of the test data was detected, and the optimum laser light pulse width or the optimum laser light intensity was determined based on the detected signal intensity.

Embodiment 2 In a magneto-optical recording medium having wobble pits for performing tracking by sample servo, an intermediate portion between a track on which test data is recorded and a track adjacent thereto is reproduced, and The reproduced signal intensity of the data leakage was detected, and the optimum laser light pulse width or the optimum laser light intensity was determined from the detected signal intensity.

The details will be described below. First, in the magneto-optical recording / reproducing apparatus shown in FIG. 6, while driving the magneto-optical disk 21, the optical head including the laser 22 is positioned on a track having a desired address, and the magnetic head including the magnetic coil 29 is positioned near the track. Position. Then, while applying a recording external magnetic field, laser light pulses P1 to P5 having various recording laser pulse widths as shown in FIG. 1A are irradiated, and the corresponding test signals are shown in FIG. Is recorded as shown in FIG. The magneto-optical recording magnetic domain recorded at that time becomes wider and longer as the pulse width increases, as shown in FIG. FIGS. 1A and 1B show a case where the recording area is a groove portion, and when a light spot is tracked on a land portion adjacent to the groove portion, the magneto-optical reproduction signal including leakage of test data is shown in FIG. 1 (c). In order to track the land portion, the polarities of the signals from the two photodetectors that generate the tracking error signal may be exchanged. Since the amount of leakage into the adjacent track (groove portion) can be determined from the intensity of the magneto-optical reproduction signal, a level that does not affect the adjacent track is set as a slice level, and a reproduction signal that does not exceed the level is used. The laser pulse width can be set to the optimum recording laser light pulse width. In FIG. 1, P3 is optimal.

FIG. 2 shows a case in which laser light pulses (P 6 to P 10) having various recording laser pulse light intensities are irradiated to record test signals corresponding thereto, and, as in FIG. 7 shows how the light intensity of a pulse is determined. In FIG. 2, P8 is optimal.

<< Embodiment 3 >> FIGS. 3 and 4 show the case of a magneto-optical disk using both a land portion and a groove portion as recording areas. FIG. 3 shows laser light pulses (P11 to P15) having various recording laser pulse widths as in FIG.
FIG. 4 shows a case where test signals corresponding to those are recorded by irradiating laser light pulses (P16 to P20) having various recording laser pulse light intensities similarly to FIG. This is a case where a test signal to be recorded is recorded.
3 and 4 show test signals recorded in the groove portion.
The light spots are tracked on the lands to show a magneto-optical reproduction signal in which the test data leaks.
A magneto-optical disk that uses both lands and grooves as recording areas has a groove depth adjusted to reduce crosstalk. The signal amplitude of the reproduction signal becomes smaller. Here, as in FIGS. 1 and 2, a level that does not affect an adjacent track is defined as a slice level, and a laser light pulse width and light intensity corresponding to a reproduction signal that does not exceed the level are set to an optimum recording laser light pulse. It can be width and light intensity. In FIG. 3, P14 is optimal, and in FIG. 4, P19 is optimal.

Embodiment 4 FIG. 5 shows a case of a magneto-optical recording medium having wobble pits for performing tracking by sample servo. Here, a case is shown where the recording laser beam intensity is changed by modulating the magnetic field. The recorded magneto-optical recording magnetic domain becomes wider as the recording laser beam intensity increases. The magneto-optical reproduction signal obtained by reproducing the intermediate portion between the track on which the test data is recorded and the adjacent track has no groove portion, so that the signal intensity of the leakage of the test data is increased.
Also in this case, a level that does not affect an adjacent track is set as a slice level, and a laser light intensity corresponding to a reproduction signal that does not exceed the level can be set as an optimum recording laser light intensity. In FIG. 5, P24 is optimal.

Embodiment 5 The present invention is carried out on a recording medium of a phase change type having grooves and lands alternately. When test data is recorded on the land portion of the phase change recording medium, unlike the embodiment of the magneto-optical recording medium, the groove portion adjacent to the recorded land portion is a group for detecting a tracking error signal. The intensity of the diffracted light from the optical disk changes depending on the size of the land portion recording pits, that is, the tracking offset amount changes. In order to eliminate the influence of this change, a recording / reproducing apparatus in which a peak hold device was previously attached to a tracking error signal detection system was used. That is, the reflected light amount of the tracking, which decreases due to the presence of the pits, is corrected, the groove portion adjacent to the land portion on which the test recording pit signal is recorded is reproduced, and the reproduction signal intensity of the leakage of the test data is detected. The optimum laser light pulse width or the optimum laser light intensity was determined from the intensity.

Embodiment 6 The present invention is carried out on a write-once recording medium having a groove portion and a land portion alternately.
When the test data is recorded on the land portion of the recording medium of the write-once recording method, unlike the case of the embodiment of the magneto-optical recording medium, the diffracted light intensity of the tracking error signal from the group adjacent to the recorded land portion is different. Since it changes depending on the size of the land recording pit, the tracking offset amount changes. Therefore, as in the case of the fifth embodiment, the measurement was performed using a recording / reproducing apparatus in which a peak hold device was previously attached to a tracking error signal detection system. Others are the same as those of the fifth embodiment.

In the present invention, test recording is performed before user data recording, and a test recording signal is reproduced by shifting the tracking center as described above. The test recording / reproducing control circuit 24 controls until the optimum recording condition for recording user data is obtained. Further, the obtained optimum recording condition is transmitted as a control signal to a driver connected to the laser controller, and in the recording and reproduction of user data, recording and reproduction are performed under the optimum recording condition.

The laser light pulse width and light intensity obtained in this way are the optimum laser light pulse irradiation conditions for recording on the optical recording medium. By recording information under the laser irradiation conditions optimized in this way, it is possible to perform recording with little leakage into an adjacent recording track.

The test signal can be recorded at any time before the information is actually recorded. For example, when the operation of the magneto-optical disk drive starts or when the magneto-optical disk is mounted on the apparatus. May be recorded in the above-mentioned area, or may be recorded at regular time intervals.

The magneto-optical recording / reproducing method of the present invention has been described in detail with reference to the embodiments. However, the present invention is not limited to these, and both the laser pulse width and the light intensity can be optimized simultaneously. It may be.

[0032]

According to the magneto-optical recording / reproducing method of the present invention, a test signal is recorded / reproduced in advance to determine one or both of the optimum conditions of the laser pulse width and the light intensity at the time of recording. By performing actual information recording under laser irradiation conditions, it is possible to perform recording with less crosstalk on an adjacent recording track. Therefore, by using the magneto-optical recording and reproducing method of the present invention, the reliability of the magneto-optical recording apparatus can be improved. Performance can be improved.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram showing a relationship among a test laser light pulse width, a magneto-optical recording magnetic domain, and an adjacent reproduction signal.

FIG. 2 is a conceptual diagram showing a relationship among a test laser light pulse width, a magneto-optical recording magnetic domain, and an adjacent reproduction signal.

FIG. 3 is a conceptual diagram showing a relationship among a test laser light pulse width, a magneto-optical recording magnetic domain, and an adjacent reproduction signal.

FIG. 4 is a conceptual diagram showing a relationship between a test laser light pulse width, a magneto-optical recording magnetic domain, and an adjacent reproduction signal.

FIG. 5 is a conceptual diagram showing a relationship among a recording external magnetic field, a test laser beam output width, a magneto-optical recording magnetic domain, and a reproduction signal in an adjacent track.

FIG. 6 is a configuration diagram of an optical magnetic field modulation type recording / reproducing apparatus used in an embodiment of the present invention.

FIG. 7 is a conceptual diagram showing an example of a portion including wobble pits on an optical recording medium used in the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Wobble pit area 2 Mirror part 3 User recording area 4 Test recording area 7 Wobble pit 8 Test recording pit 9 Groove 10 Land 21 Recording disk 22 Laser 25 Polarizing prism 28 Photodetector 29 Magnetic coil 31 Phase adjustment circuit 37 Embedded clock Extraction circuit 38, 381, 382 Decoder 39 PLL circuit

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Norio Ota 1-88 Ushitora 1-chome, Ibaraki-shi, Osaka Inside Hitachi Maxell Co., Ltd.

Claims (9)

[Claims] 1. A recording medium in which recording areas of a band-shaped section are used side by side, a plurality of test pulse signal element data having a pulse width as a variable in a first band-shaped section unrecorded area. A recording step for obtaining a recording width function; and a second step adjacent to the area recorded in the recording step directly following the recording step.
A reproducing step of reproducing an unrecorded area in a strip-shaped section, detecting the intensity of the reproduced signal obtained in the reproducing step, and calculating an optimum pulse width and an optimum recording arrangement of data based on the pulse width. And an execution step of executing the optimum pulse width and the optimum recording arrangement of data. 2. A recording step according to claim 1, wherein a recording width function of a plurality of test pulse signal element data having a pulse intensity of said pulse width signal as a variable is obtained, and said recording step is directly performed continuously. A second area adjacent to the area recorded in the recording step
A reproducing step of reproducing an unrecorded area having a strip-shaped section, and a selecting step of detecting a reproduction signal intensity of the test data obtained in the reproduction step and obtaining an optimum value of the intensity of the test pulse signal from the intensity level. And a recording / reproducing method for a recording medium, comprising: executing an information recording on the recording medium by using the pulse signal of the optimum intensity. 3. The magneto-optical recording medium according to claim 1, wherein the recording area of the strip-shaped section is a magneto-optical recording medium in which grooves and lands are alternately formed, and the recording area of the strip-shaped section is heated by a laser beam. A magneto-optical recording / reproducing method for recording data as recording magnetic domains by applying a recording magnetic field having a polarity corresponding to the data, and reproducing the recording magnetic domains using a magneto-optical effect. Recording and playback method. 4. The method according to claim 2, further comprising the steps of: using a laser light pulse as a pulse signal, and recording a plurality of test laser light signal element data using the laser light intensity as a variable; When the test data is in the land portion, the adjacent land portion is reproduced, and when the test data is in the land portion, the adjacent groove portion is reproduced, and the reproduction signal intensity of the test data is detected. A recording / reproducing method for a recording medium, comprising: a step of obtaining an optimum value of intensity; and a step of executing magneto-optical recording by using the obtained light intensity of laser light. 5. A method for recording data as recording magnetic domains by applying a recording magnetic field having a polarity corresponding to data while heating a magneto-optical recording medium having wobble pits for tracking by sample servo with a laser beam. ,
A magneto-optical recording / reproducing method for reproducing a recording magnetic domain using a magneto-optical effect, wherein a laser beam is a pulse, and a step of recording test data while changing the pulse width to various pulse widths; Reproducing the intermediate portion between the track where the test data exists and the adjacent track, detecting the reproduction signal intensity of the test data, and obtaining the optimum value of the laser light pulse width based on the level thereof; Performing magneto-optical recording with a laser light pulse width. 6. A method of recording data as recording magnetic domains by applying a recording magnetic field having a polarity corresponding to data while heating a magneto-optical recording medium having wobble pits for tracking by sample servo with a laser beam. ,
In a magneto-optical recording / reproducing method for reproducing a recording magnetic domain using a magneto-optical effect, a step of recording test data while changing the light intensity of a laser beam to various intensities; and wherein the recorded test data exists. A step of reproducing an intermediate portion between a track and an adjacent track, detecting a reproduction signal intensity of test data, and obtaining an optimum value of the light intensity of the laser light based on the level thereof; Performing magneto-optical recording by light intensity. 7. The method according to claim 3, wherein the step prior to the step of executing magneto-optical recording is performed at least one of a time when the operation of the magneto-optical recording apparatus is started and a time when the magneto-optical recording medium is mounted on the magneto-optical recording apparatus. A recording / reproducing method for a recording medium, characterized by being executed by: 8. The method according to claim 4, wherein the steps before the step of performing magneto-optical recording are performed at the time of starting operation of the magneto-optical recording apparatus and at the time of mounting the magneto-optical recording medium on the magneto-optical recording apparatus. Recording / reproducing method for a recording medium, wherein the method is executed at least at one time point. 9. A recording medium in which recording areas of a strip-shaped section are used side by side, from the time when the recording medium is inserted into a recording / reproducing apparatus and set to a recording mode, the strip-shaped section is not recorded. A recording step of obtaining a recording width function of a plurality of test pulse signal element data using a pulse width as a variable in an area, and an offset tracking of the recording step directly adjacent to the recording area following the recording step. A reproducing step of reproducing an area, a calculating step of detecting an intensity of a reproduced signal obtained in the reproducing step, and calculating an optimum pulse width and an optimum recording arrangement of data based on the pulse width; A recording / reproducing method for a recording medium, comprising repeating a series of steps including an execution step of executing an optimum pulse width and an optimum recording arrangement of data in this order at regular intervals.