JPH07105585A - Optical recording method - Google Patents

Abstract

PURPOSE:To realize an optical disk of high reliability and very high density recording by erasing recording domains formed with a test pattern under such conditions for erasing as to form the widest magnetic domain. CONSTITUTION:In the figure, level Pr is the power for reproducing and Pas is the power for preheating. Pas is controlled to obtain a constant thermal interference quantity. Thereby, by combining an edge detecting method and a detecting method to independently detect front edges and rear edges, the edge shift amt. is controlled to a specified value or lower. Levels PW1 and PW2 are recording levels which are determined by the structure and material of the optical disk. After the recording region and read-level region in Tw are passed, the power level returns to the preheat level again. In the controlling method of test writing recording by this constitution, the recording film in the test pattern recording region shows no changes in magnetic characteristics by structural relaxation nor causes jitter or flucturation of edge shit. Thereby, an optical disk of high reliability and very high density recording can be realized.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording method for optical recording, and more particularly to an optical recording method for recording, reproducing or erasing data by using a light beam such as a laser beam, and in particular, rewritable The present invention relates to a recording method for optical recording that improves the number of times and improves the reliability of optical disk recording.

[0002]

2. Description of the Related Art In recent years, a magneto-optical disk has been put to practical use as a rewritable optical disk, and at present, research and development are being conducted with the aim of improving its recording density. One of the important things for practical use of magneto-optical recording is to improve the number of rewritable times. When using a normal magneto-optical disc,
The number of times of recording and erasing must be 10 ⁶ or more.
In particular, in order to realize high-density recording, test pattern recording is performed at fixed time intervals in order to detect information such as fluctuations in operating environment conditions and fluctuations in laser power of the light source. It is effective to determine the control conditions for recording, reproducing and erasing data.

In a magneto-optical disk system in which test patterns are recorded at regular time intervals, the area in the magneto-optical disk 7 that has the largest number of rewrites is the test pattern recording area. For example, assuming that the test recording is performed once every 5 minutes and the life of the disc is 10 years, and the disc is used as it is, the number of times of rewriting is 10 ⁶ or more. If the recording sensitivity or the like of the recording area of the test pattern fluctuates, the user data may not be recorded normally, so that the reliability of the disc may not be ensured.

Japanese Patent Laid-Open No. 2-252150 discloses a technique relating to the improvement of the recording medium itself, which optimizes the laminated structure of the disc by paying attention to the movement of the heat flow flowing in the magneto-optical recording medium, in order to improve the reliability of the disc. ing.

[0005]

It is the laminated structure of the magneto-optical recording medium, the recording material, etc. that largely control the recording-reproducing characteristics and the rewriting characteristics of the optical disk. How to apply the light beam in the device is important. Since the optical disc is a replaceable medium, the track offset must be taken into consideration when recording or erasing data on the optical disc. For example, when erasing data recorded by performing track offset in a certain direction, track offset may occur in the opposite direction. Therefore, in order to completely erase without erasing, it is necessary to select the erase magnetic domain width in consideration of the track offset. In that case, a magnetic domain wider than the recording magnetic domain width must be formed. When an amorphous magneto-optical recording film is used, since it is an amorphous film, the temperature of the recording film at the time of recording or erasing is At a temperature at which structural relaxation occurs, the perpendicular magnetic anisotropy energy decreases, so that the recording sensitivity may change or some portions may not be recorded. As a result, the reproduction signal output is lowered, and stable recording may not be possible in some cases.

Therefore, an object of the present invention is to provide a recording method of optical recording capable of increasing the number of rewritable times of an optical disk. Another object of the present invention is an optical disc system having a test recording function, which can be erased without considering a track offset when erasing data recorded in a test area having the largest number of rewritings in an optical disc. It is to provide a recording method of recording.

[0007]

In order to achieve the above object, in a method of recording, reproducing and erasing user data using an optical disc, a test pattern is placed at a predetermined position on the optical disc after the optical disc is mounted in an optical disc drive. Is recorded, the test pattern is reproduced, the recorded test information is extracted, the extracted test information is analyzed, and then the user data (information data) is recorded, reproduced, or erased, The recorded test pattern is erased after the test information is extracted.

Here, the test information refers to the state of the environment in which the optical disc is used, for example, the operating environment temperature, the fluctuation of the laser power, the recording sensitivity of the optical disc loaded in the optical disc drive, and the recording of information data, This is information for obtaining conditions for reproduction and deletion.

The test pattern is recorded by changing the pulse width or power of the light beam consisting of minute pulses. As the test pattern, a pattern that can evaluate thermal interference in a modulation method used for recording and reproducing user data is used. In particular, the test pattern includes at least the shortest pattern and the longest pattern in the user data modulation method. Preferably. In order to record the test pattern, the recording / reproducing apparatus is provided with a part in which standard recording conditions are stored in advance, and the power or pulse width of the light beam is increased or decreased at a fixed rate based on the condition to perform recording. As the recording waveform of the user data and the test pattern, it is effective to control the shape of the recording magnetic domain that at least four power levels are formed and a portion corresponding to one recording code is formed by an aggregate of minute pulses. In this case, it is preferable in terms of manufacturing the device that the individual pulse width of the aggregate of minute pulses is based on the pulse width synchronized with the recording clock. This is an effective method especially when the mark length recording method is used.

In the test pattern recording area, the entire surface of the disk is divided into a plurality of zones, a test track for recording the test pattern is provided in one zone, and a constant test pattern is recorded therein. Preferably, the test pattern is recorded in the innermost zone, the zone near the center, and the outermost zone in the radial direction of the disc, and the recording conditions of the zones in between are obtained by using the results of the preceding three points. It can be obtained by extrapolation. In this method, when user data or a test pattern is recorded in each zone, recording is performed so that the recording densities are the same in all zones, in the so-called zone CAV method, in the innermost portion, which is susceptible to heat interference. It is valid. In addition, a fixed functional relationship that holds between the temperature and the power of the light beam is stored in the recording / reproducing apparatus in advance, and the recording condition is calculated by using the result of recording the test pattern on one test track. You may decide.

The test pattern may be erased after the optical disc is mounted on the drive device, and before or after the information data is recorded, reproduced, or erased. It may be before exchanging the optical disc or before turning off the power source of the optical disc drive. The power of the light beam used for erasing the test pattern may be the highest power of the light beams used for recording the test pattern. Alternatively, the recorded test pattern may be erased under the condition of the largest pulse width of the recording pulses used for the test recording.
That is, in the test pattern recorded on the disc, an erasing magnetic domain capable of completely erasing the widest magnetic domain can be formed, or continuous light or pulsed light having a power in which the erasing magnetic domain width is adjusted according to the magnetic domain width of the test pattern. When the optical disk is irradiated with power capable of forming an erasing magnetic domain capable of erasing the widest magnetic domain, the maximum temperature reached by the recording film is 3
It is desirable to erase at a temperature not exceeding 00 ° C. The maximum temperature and laser power can be determined in advance if the material and structure of the optical disc are determined. The highest temperature reached is important when using amorphous optical time recording, which is effective in suppressing structural relaxation.

[0012]

In the method of the present invention, the test pattern is recorded on the optical disc which is the exchangeable recording medium after it is mounted on the optical disc drive, that is, the optical recording / reproducing device, and the erasing of the test pattern is removed from the optical disc drive. Do before. Therefore, when erasing the test pattern, the center of the light beam for erasing traces along the center of the recorded test pattern. Therefore, it is not necessary to consider the offset, and the width and intensity of the light beam for erasing can be suppressed because the width of the magnetic domain can be narrowed by not considering the track offset, and the maximum temperature reached by the recording film is that much. Can be lowered. Therefore, it is easy to erase a test pattern that is frequently rewritten below the structural relaxation temperature of the amorphous film that constitutes the optical disc, and it is possible to prevent fluctuations in the recording sensitivity of the optical disc and the occurrence of unrecordable portions, and to improve the reliability of the optical disc. The rewriting characteristics can be improved.

Currently, the most widely used amorphous alloy thin films of rare earth elements and iron group elements have a crystallization temperature of 450 ° C.
Although high as above, in the present invention, the temperature distribution of the recording film can be controlled by optimizing the recording waveform of the test pattern and the erasing condition as described above, and the maximum temperature reached of the recording film is 300 ° C. or less. It is possible to perform stable recording.

If the recording accuracy of the test pattern is low, the accuracy in recording the user data, particularly in the case of recording the mark length, it is necessary to precisely control not only the length of the mark but also the width of the mark. In recording on an optical disk, what is important when performing high density recording is how to suppress thermal interference between recording domains. Thermal interference has two factors on the device side, such as the waveform shape of the recording pulse, in addition to the factors on the disc side such as the laminated structure of the disc and the materials used. When ensuring the compatibility of the disks, the compatibility of the disks can be ensured by grasping the ratio of the thermal interference of these disks and determining the recording condition using the result. The test pattern is recorded, the test pattern is reproduced, and the deviation from the recorded result in the standard state is detected, the center value of the signal amplitude of the longest pattern and the center value of the signal amplitude of the shortest pattern are detected. By detecting the difference and controlling the recording so that the difference becomes zero and recording, the shape of the recording domain to be formed can be controlled. By the way, the test pattern recording is performed, and the result is used to determine the condition for recording the user data. It is always the same shape regardless of the environmental temperature variation, the laser power variation or the recording sensitivity difference between the disks. This is to form the recording domain of In other words, when a test recording is performed to erase a recording domain that has been recorded with a maximum offset in one direction in consideration of the track offset, even if the recording domain is shifted in the opposite direction to the maximum, the magnetic domain width that can be completely erased without being erased. The laser power can be set so that

[0015]

EXAMPLES The present invention will be described in more detail by way of examples. FIG. 1 is a partial sectional view showing the structure of an optical disc used in an embodiment of a recording method according to the present invention. On a glass or plastic substrate 1 having uneven guide grooves,
75 nm thick silicon nitride film 2, 25 nm thick Tb
The FeCo film 3, the silicon nitride film 4 having a film thickness of 20 nm, and the Al ₉₈ Ti ₂ film 5 having a film thickness of 50 nm are sequentially laminated.
The entire surface of the recording medium of the optical disk is coated with the ultraviolet curable resin 6. Such a single-plate magneto-optical disk is formed by laminating two recording medium surfaces so as to face each other with an adhesive or the like.

FIG. 2 is a block diagram showing the configuration of an embodiment of an optical disk recording / reproducing apparatus for carrying out the recording method according to the present invention. The feature is that a test writer 21 is provided in addition to a normal recording / reproducing apparatus. That is, at the time of recording the test pattern and the user data, the user data and the signal of the trial writing device 21 are converted by the recording waveform generator 8 into the recording waveform having the shape shown in FIG.
To the laser driver 10. The light from the laser 11 driven by the laser driver 10 is emitted by the optical head 12
Is recorded on the optical disk 7 which is a recording medium.

At the time of reproducing the test pattern and the user data, the optical head 12 is added to the shaper 17 via the light receiver 13 and the reproduction amplifier 14. When the waveform shaping is required, the waveform shaping device 15 is provided and the input switching device 16 is used for switching. The output of the shaper 17 is identified by the discriminator 19 and decoded by the combiner 20 to form an output data bit string.

FIG. 3 is a diagram showing an example of a recording waveform used for recording a test pattern and user data. The recording waveform consists of four power levels, the first level P
r is the power during reproduction and was set to 1.5 mW. The second level Pas is preheat power, and by increasing or decreasing this power, the same amount of thermal interference is always obtained under any environmental condition. As a result, the edge shift amount can be suppressed to a certain value or less by combining the edge position detection method and the so-called front and rear edge independent detection method of independently detecting the front edge and the rear edge and finally synthesizing the waveform. Then, the third level Pw1 and the fourth level P
w2 is a recording level, and the values of Pw1 and Pw2 are determined by the structure and material of the optical disc. After passing through the recording area, the read level area of Tw is passed and the preheat level is reached again. In the shortest pattern, the previous read level period is Tw and the preheat level period is Tw. For other patterns, the preheat level length may be controlled. Optical disc 7 having the structure shown in FIG.
On the other hand, the value of each power is Pr = 1.5 mW,
Pas = 3.3 mW, Pw1 = 5.8 mW, and Pw
2 = 6.1 mW was set.

The modulation method of the encoder 22 is (1,7) RL
The L system was used, and the mark length recording system was used as the recording system. Regarding the recording density, an optical disk having a diameter of 5.25 inches was divided into 32 zones, and the recording frequency was changed by changing the recording frequency for each zone so that the recording density was constant in each zone. The pulse width of the recording waveform is 2T, which is the shortest in the (1,7) RLL system.
When recording the pattern of w, the innermost circumference was set to 60 ns, and the power at that time was set to Pw1 only. Also, 3Tw
For the pattern of, when you enter the recording mode, first,
60 ns at Pw1 level and 20 ns Pas
After passing the level, the Pw2 level of 20 ns was set. After that, when the pattern length becomes longer, it is only necessary to extend the combination of the Pas level of 20 ns and the Pw2 level of 20 ns. Thereby, 7 patterns of 2Tw to 8Tw can be formed.

Then, the optical disk 7 having the structure shown in FIG.
Was set in the recording / reproducing apparatus, and trial writing was performed on the optical disc. The pattern used for trial writing is (1,
7) Repeated patterns of the shortest (2Tw) pattern and the longest (8Tw) pattern in the RLL modulation method were recorded while changing the recording laser power (± 3%, ± 6%, ± 10%). Here, in order to change the power, the ratio of three power levels Pw1 / Pw2, Pw1 / Pas, Pw2 /
It is important to change while keeping Pas constant. This is to make the heat flow constant during the temperature raising process and the temperature lowering process. The recording magnetic domain width formed at that time was 0.5 depending on the pattern according to observation with a polarization microscope.
It varied between 5 and 0.85 μm. Then, the data recorded in this way was reproduced.

FIG. 4 is a waveform diagram for explaining the principle of detecting a change in recording conditions due to trial writing. The figure shows a waveform diagram showing the relationship between the central value of the signal amplitude of the shortest pattern 2Tw and the central value of the signal amplitude of the longest pattern 8Tw (ΔV). FIG. 5 shows the fluctuation power ΔP and the standard power Pop.
The difference between the ratio ΔP / Popt and the central value of the signal amplitude (Δ
The measured value which shows the relationship with V) is shown.

After reproducing the data, the test pattern was erased. In that case, the highest power in the recorded test patterns was 10% higher than the standard power, which was set as the laser power for erasing the test patterns. As a result, the test pattern could be completely erased without being erased. In this way, in the test pattern recording area, since the optical disc and the recording / reproducing device are not exchanged, the track offset amount does not change. Therefore, when erasing the test pattern, it is not necessary to consider this offset. Then, the power of the test pattern recording is changed (± 3%, ± 6%, ± 10%).
%), And then 5 mW as the erasing power to obtain a domain width formed with a power 10% higher than in the standard state.
When erasing was repeated after setting to 1, the user data was recorded in the data area by using the result obtained by the test recording after repeating 10 ⁷ times.

The light used for erasing here is continuous light, but it may be pulsed light, and what is important is to use one having a lower maximum temperature at the center of the laser spot. Then, when the jitter and the edge shift at that time were measured, the jitter was 35% in terms of the detection window width ratio, and the edge shift was ± 2 ns or less. These values did not show any difference before the repeated recording and erasing of the test pattern. On the other hand, in determining the erase condition in the test area, considering the track offset, the maximum is 0.85μ.
The m-width magnetic domain was erased with an erasing magnetic domain width of 1.25 μm in consideration of a track offset of ± 0.1 μm.

As a result, when the test pattern was recorded and erased 10 ⁶ times and then recorded in the user data area under the recording condition obtained by the test recording, the jitter was 65% in terms of the detection window width ratio (initial value). Of 35%) and the edge shift increased to ± 8 ns (initially ± 2 ns or less). This is because the test track was erased at high power, and the recording sensitivity was increased due to the decrease in perpendicular magnetic anisotropy due to the structural relaxation of the recording film. , Set the recording condition to a power lower than the standard power. As a result, the power becomes lower than the standard power in the data area, resulting in insufficient power and increased jitter and edge shift.

However, when recording and erasing of the data area are repeated, even if the track offset is taken into consideration, 1.0 μ
It suffices to erase with an erase domain width of m width. By the way, 1.2
The maximum attainable temperature of the recording film is 340 ° C. when obtaining an erase magnetic domain width of 5 μm, whereas the maximum attainable temperature of the recording film is 290 ° C. when obtaining an erase magnetic domain width of 1.0 μm.
It was estimated by computer simulation that the temperature was as low as 0 ° C. The erase magnetic domain width is different between the test pattern recording area and the user data recording area because the optimum recording power is searched for by recording the test pattern, and the power is changed from the standard condition so that the overwriting is performed. If there is an area and there is an unerased portion, it will cause an error.

However, although there is an area recorded with overpower in the test pattern area, in this area, the optical disk is exchanged to perform recording and erasing by different recording / reproducing devices, or the optical disk is exchanged. Therefore, it is not necessary to consider the track offset. As a result, the optimum erase magnetic domain width differs between the test pattern recording area and the data recording area. On the other hand, in recording the test pattern, the power of the laser light may be changed for each sector, or may be changed within one sector. Since the laser light power is systematically changed in this way, the erasing power may also be changed in synchronization with this change. By erasing in this way, it is possible to further suppress changes in magnetic characteristics such as structural relaxation of the magneto-optical recording film, so that higher reliability can be achieved.

Another embodiment of the recording method according to the present invention will be described. In another embodiment, in order to record a test pattern, the pulse width is uniformly changed while keeping the power ratio of each laser beam constant. Here, in order to make the heat flow constant during the temperature raising process and the temperature lowering process, each pulse width in the multi-pulse was uniformly changed. Here, the pulse interval was reduced by the amount by which the pulse width was increased. By changing the pulse interval in this way, more precise control can be performed as compared with the case where the laser power is changed. Changing the pulse width corresponds to changing the average laser power (product of pulse width and power). Trial writing control was performed by this pulse width control method. A test pattern was recorded on the test track of the optical disc having the laminated structure shown in FIG. As the test pattern, a repetition of the shortest pattern and the longest pattern of the (1,7) modulation method was used. And
The above pattern is recorded by changing the pulse width to ± 3%, ± 5%, ± 8% and is reproduced, and the difference between the center values of the signal amplitudes of each pattern is detected, and the difference is determined to be zero. I searched for the following recording conditions. It was set as the optimum recording condition in the usage environment.

After the optimum recording condition was found, the recorded test pattern was erased. In this case, when the recording is performed under the condition that the pulse width is the widest, the recording medium has the widest magnetic domain width.
Continuous light was irradiated with a power of mW. The magnetic domain width formed by this power was 0.8 μm. Here, the widest magnetic domain width formed by test recording was 0.8 μm, and when erasing with this power, complete erasing was possible without erasing. In this way, after the recording and erasing of the test pattern were repeated 10 ⁷ times, the test pattern was recorded and recorded in the user data area under the recording conditions obtained from the test pattern. When the jitter and the edge shift at that time were measured, the jitter was 31% in terms of the detection window width ratio, and the edge shift was ± 1 ns or less.
These values did not differ from those before repeating recording and erasing of the test pattern.

On the other hand, in order to determine the erasing conditions in the test pattern area, a magnetic domain having a maximum width of 0.85 μm is taken into consideration with a track offset of 1.25 μm in consideration of a track offset of ± 0.1 μm. Erasure of width Erased by the width of the magnetic domain. As a result, when the test recording and erasing were repeated 10 ⁶ times and the data was recorded in the data area under the recording conditions obtained by the test pattern recording, the jitter was 55% in the detection window width ratio (initially 31%). Edge shift is ± 6ns
(Initially ± 1 ns or less). This is because the test track was erased at high power, and the recording sensitivity was increased due to the decrease in perpendicular magnetic anisotropy due to the structural relaxation of the recording film. , Set the recording condition to a power lower than the standard power. Therefore, in the data area, the power is lower than the standard power, so that the power becomes insufficient and the jitter and the edge shift increase. As described above, in the test recording, when the recording domain formed by the test recording is erased, it is not necessary to consider the track offset.

[0030]

According to the present invention, in the test write recording control method for determining the recording condition by the test pattern recording,
By erasing under the condition that the widest magnetic domain is formed in the recording of the test pattern used for erasing the recording magnetic domain formed by the test pattern, the recording film in the test pattern recording area has magnetic properties due to structural relaxation etc. Since it does not change, jitter and edge shift do not fluctuate, and a highly reliable optical disk can be realized. Also, since the trial writing recording control method works effectively,
Ultra high density recording can be realized.

[Brief description of drawings]

FIG. 1 is a partial sectional view showing the structure of an optical disc used in an embodiment of a recording method according to the present invention.

FIG. 2 is a block diagram showing the configuration of an embodiment of an optical disc recording / reproducing apparatus for implementing the recording method according to the present invention.

FIG. 3 is a diagram showing waveforms used for recording used in an example of a recording method according to the present invention.

FIG. 4 is an explanatory diagram of the principle of detecting a change in recording conditions due to trial writing used in an embodiment of the recording method according to the present invention.

FIG. 5 is a diagram showing measured values showing a relationship between a ratio ΔP / Popt between a fluctuation power ΔP and a standard power Popt and a difference (ΔV) between central values of signal amplitudes.

[Explanation of symbols]

1: Optical Disc Substrate 12: Optical Head 2: Silicon Nitride Film 13: Photodetector 3: TbFeCo Film 14: Reproducing Amplifier 4: Silicon Nitride Film 15: Waveform Equalizer 5: Al ₉₈ Ti ₂ Film 16: Input Switcher 6: UV curable resin 17: shaping device 7: recording medium 18: PLL 8: recording waveform generator 19: discriminator 9: power controller 20: decoder 10: laser driver 21: trial writing device 11: laser 22: code vessel

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Hiroyuki Doninaga, 1-280 Higashi Koikeku, Kokubunji City, Tokyo Metropolitan Research Center, Hitachi, Ltd. (72) Takeshi Maeda 1-280 Higashi Koikeku, Tokyo Kokubunji City Hitachi, Ltd. (72) Inventor Fumio Kugiya 1-280 Higashi Koikekubo, Kokubunji City, Tokyo Inside Hitachi Central Research Laboratory

Claims (17)

[Claims] 1. User data is recorded using an optical disc,
In optical recording for reproducing and erasing, after mounting the optical disc in an optical disc drive, recording a test pattern at a predetermined position of the optical disc, reproducing the test pattern to extract test information, and using the extracted test information The user data is recorded, reproduced, or erased, and the recorded test pattern is erased after the test information is extracted and before the optical disc is removed from the optical disc drive. Recording method of record. 2. An optical disk is used to record user data,
In optical recording for reproducing and erasing, after mounting the optical disc in an optical disc drive, recording a test pattern at a predetermined position of the optical disc, reproducing the test pattern to extract test information, and using the extracted test information A recording method of optical recording, characterized in that the user data is recorded, reproduced, or erased, and the recorded test pattern is erased before power-off of the optical disk drive. 3. The recording method for optical recording according to claim 1 or 2, wherein an erased magnetic domain, which is capable of completely erasing the widest magnetic domain in the recorded test pattern, is used to erase the recorded test pattern. A recording method for optical recording, comprising irradiating a test pattern recording area of the optical disc with continuous light or pulsed light that can be formed. 4. The optical recording method according to claim 1, wherein continuous light or pulsed light for obtaining a magnetic domain width equal to the magnetic domain width of the recorded test pattern is used to erase the recorded test pattern. A recording method for optical recording, comprising irradiating a test pattern recording area of the optical disc. 5. The optical recording method according to claim 1 or 2, wherein the recorded test pattern is erased so as to have the same magnetic domain width as that formed under the condition of the largest pulse width in the recorded test pattern. A recording method for optical recording, comprising irradiating a test pattern recording area of the optical disc with continuous light or pulsed light capable of obtaining a magnetic domain width. 6. The optical disc recording method according to claim 3, 4 or 5, wherein the optical disc is irradiated with a light beam for erasing the recorded test pattern. 2. The recording method for optical recording, wherein the power of the light beam is set so that the maximum temperature reached by the recording film does not exceed 300 ° C. 7. The recording method for optical recording according to claim 1, wherein the recorded test patterns include a shortest pattern and a longest pattern generated when the user data is recorded. Optical recording method. 8. The optical recording method according to claim 1, wherein standard recording conditions are stored in the optical disk recording / reproducing apparatus, and the test pattern is recorded by using the recording conditions. A recording method for optical recording, characterized in that the level ratio of the beam is kept constant and the power or pulse width of the light beam is increased or decreased for recording. 9. The optical recording method according to claim 1, wherein the entire surface of the optical disc is divided into a plurality of zones, and a test track for recording a test pattern is provided in one zone. A recording method for optical recording, comprising recording the test pattern on the test track. 10. The optical recording method according to claim 9, wherein a constant test pattern is recorded in at least the innermost zone, outermost zone and central zone of the recording area of the disc. Recording method for optical recording. 11. The optical recording method according to claim 9 or 10, wherein recording is performed so that the recording density of the user data and the test pattern in each of the plurality of zones is equal in all zones. Recording method of optical recording characterized by. 12. An optical recording method according to claim 1, wherein a mark length recording method is used for recording the user data and the test pattern, and an original waveform slice method is used for detecting a mark edge position. A recording method for optical recording, comprising: 13. A recording method for optical recording according to claim 1, wherein after the recording of the test pattern, the data of the test pattern is reproduced to detect a deviation from a recording result in a standard state. In order to do so, the difference between the center value of the signal amplitude of the longest pattern and the center value of the signal amplitude of the shortest pattern is detected, and the light beam is controlled so that the difference becomes zero and the user data is recorded. A recording method of optical recording characterized by the above. 14. The optical recording method according to claim 1, wherein when the user data is erased by using the extracted test information, the track offset is taken into consideration in at least one direction. Recording method of optical recording characterized by setting the power of the light beam so that a magnetic domain width that can be completely erased can be obtained even when the recording domain that has been misregistered and recorded is erased and shifted to the maximum in the opposite direction. . 15. The optical recording method according to claim 1, wherein an optical disk recording / reproducing apparatus is provided with a portion in which standard recording conditions are previously stored in order to record the test pattern. A recording method for optical recording, characterized in that the power level or pulse width of the laser light is increased or decreased at a constant rate while the level ratio of the laser light power is kept constant based on the recording conditions. 16. The optical recording method according to claim 1, wherein the recording waveform for recording the user data or the test pattern has at least four power levels and one recording. A recording method of optical recording, characterized in that a portion corresponding to a code is formed from an aggregate of minute pulses. 17. The optical recording method according to claim 16, wherein the pulse width of each recording pulse consisting of the aggregate of the minute pulses is set to a pulse width synchronized with a write clock. Recording method.