JP3159157B2 - Optical disk recording method and optical disk recording device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of irradiating a light beam along a track formed by grooves or lands formed on a recording surface of an optical disk, and sequentially from an inner peripheral side to an outer peripheral side of the optical disk. The present invention relates to an optical disk recording method and an optical disk recording apparatus in which information is recorded by a mark length recording method by forming pits so that pits can be correctly formed on the center line of a track.

[0002]

2. Description of the Related Art CD-R (CD recordable), DVD
Write-once optical discs such as -R (DVD recordable) and C
D-RW (CD rewritable), DVD-RAM, MO
In a rewritable optical disk such as a (magneto-optical disk), a guide groove called a groove (pre-groove) is formed in advance, and laser light is applied to a rotating optical disk by a groove or a land (a portion between grooves). The information is recorded by forming a pit on the track by irradiating along the track composed of. In conventional tracking control for irradiating a laser beam along a track, control is performed such that the optical axis center of the laser beam is on the center line of the track when the tracking error signal is 0.

[0003]

According to the experiment of the present inventor, according to the experiment of the present invention, high-speed recording or track pitch (recording at adjacent speeds) in which recording is performed at a speed magnification of 6 times speed (6 times the standard speed), 8 times speed or higher. In high-density recording where recording is performed with the distance between tracks narrower than the standard pitch, even if the center of the optical axis of the laser beam is correctly placed on the center line of the track and irradiated,
It has been found that pits may be formed off the center line of the track.

[0004] This phenomenon will be described with reference to FIG. Here, the optical disk 10 is a dye-based write-once disk. A groove 14 is spirally formed on the transparent substrate 12 around the center axis of the disk. A land 16 is formed between adjacent grooves 14. On the transparent substrate 12, a dye layer 18 is formed as a recording layer, and a reflective layer, a protective layer, and the like (not shown) are laminated thereon. For recording information, a laser beam 20 whose light intensity is modulated by a recording signal is condensed by an objective lens 22 and is incident from the transparent substrate 12 side, and is irradiated on a track (the groove 14 in this case) to form a pit 24. This is done by: At this time, tracking control is performed so that the optical axis center 26 of the laser beam 20 is on the center line 28 of the track.

However, when high-speed recording or high-density recording is performed by such tracking control, the recording is performed immediately before the current recording track (referred to as a track being recorded) T and is adjacent to the current recording track T. Due to the residual heat from the inner track T ', the pits 24 are sometimes formed shifted to the inner circumference with respect to the center line 28 of the track. as a result,
Various problems such as deterioration of recording sensitivity and deterioration of reproduction signal quality have occurred. The degree of the shift of the pits varies depending on various recording conditions such as the type of disk used (differences in the material of the recording layer, the track pitch, etc.) and the recording speed (linear velocity of the disk and double the recording speed).

An object of the present invention is to provide an optical disk recording method and an optical disk recording apparatus which can solve the problems in the above-mentioned prior art and enable pits to be correctly formed on a track.

[0007]

An optical disk recording method according to the present invention irradiates a light beam along a track formed by grooves or lands formed on a recording surface of an optical disk, and from the inner peripheral side of the optical disk. In an optical disk recording method in which information is recorded by a mark length recording method by sequentially forming pits toward an outer peripheral side, a state where an optical axis center of the light beam is offset by a predetermined amount from a center line of the track in a disk outer peripheral direction. To perform tracking control. According to this optical disk recording method, tracking control is performed in such a state that the optical axis center of the light beam is offset from the center line of the track by a predetermined amount in the outer peripheral direction of the disk. The pits can be formed correctly on the center line of the track by canceling the tendency of the pits to be shifted to the inner peripheral side.

A method of performing tracking control so that the center of the optical axis of the light beam is offset from the center line of the track by a predetermined amount in the outer circumferential direction of the disk is performed by, for example, appropriately setting a detection section of a tracking error signal used for tracking control. Can be realized. That is, in the conventional tracking control at the time of recording, in order to prevent a DC offset from occurring, the recording pulse is excluded by excluding the ON period of the recording pulse (the period in which the laser power is increased to the recording power, that is, the period in which a pit is formed). (See Japanese Patent Application No. 1-325634). In this method, since the influence of the residual heat from the adjacent inner peripheral track does not appear in the tracking error signal in the detection section, the tracking of the optical axis of the laser beam is controlled so as to be on the center line of the track. Due to the influence, the pits are formed so as to be shifted inward from the track center line.

The heat distribution in the normal direction of the track being recorded is as shown in FIG. 3, and the track being recorded receives residual heat from the inner peripheral side. FIG. 4 shows a state in which recording is performed in a state of receiving such residual heat. When recording is performed in a state of receiving the residual heat, a pit is efficiently formed in a portion near the inner periphery of the current recording track. Therefore, as shown by a dotted line in FIG. The amount of light decreases. For this reason, even if the optical axis of the laser beam is on the center line of the track, the amount of return light from the portion near the inner circumference of the current recording track and the amount of return light from the portion near the outer circumference of the current recording track ( 4 (b), a deviation occurs, and the tracking error signal increases.

Therefore, as a detection section of a tracking error signal used for tracking control, pit formation is started in all or a part of an off section of a recording pulse and an on section of a recording pulse, and a level of a return light peaks. By using all or part of the section after exceeding (the peak part is not used because it is unstable), the influence of the residual heat is fed back to the tracking control, and as a result, a DC offset occurs in the tracking error signal. By controlling the center of the optical axis of the laser beam so as to be offset from the center line of the track by a predetermined amount, pits can be correctly formed on the track. The length of the section used for tracking control in the ON section of the recording pulse depends on the recording conditions such as the type of disc to be used (differences in the material track pitch of the recording layer, etc.) and the recording speed (disc linear velocity and recording speed magnification). By changing according to
By realizing an appropriate offset amount according to the recording conditions such as the disc type and recording speed, it is possible to always form pits correctly on the center line of the track, thereby improving recording sensitivity and recording signal quality. it can.

The tracking error signal detection section in the recording pulse ON section and the tracking error signal detection section in the recording pulse OFF section can be discontinuous. If the start point of the detection section of the tracking error signal in the section is changed according to the recording conditions such as the type of disk used and the recording speed, the timing control of the detection section is simplified. Further, according to the optical disk recording method of the present invention, since the detection section is longer than when the tracking error signal is detected only in the off section of the recording pulse, the FM modulation is performed on the track wobble (periodic meandering of the track). Also, it is possible to obtain an effect that the frequency of detection of information such as an ATIP signal recorded during the recording is increased.

One of the optical disk recording devices of the present invention is:
The detection interval of the tracking error signal within the ON interval of the recording pulse and the detection interval of the tracking error signal within the OFF interval of the recording pulse are continuous. The recording pulse is turned on, pit formation starts, and the level of the return light In a section from an appropriate point in time after the peak exceeds the peak to the next turn on of the recording pulse, the detected tracking error signal is sequentially output, and in the remaining section, the tracking error signal immediately before the section is held or Set tracking error signal to 0
And a tracking signal generation circuit for smoothing the series of signals to generate a tracking signal, and performing tracking control using the generated tracking signal. In this case, a circuit for changing the start point of the tracking error signal detection section may be further provided.

In another optical disk recording apparatus of the present invention, an offset signal generated separately is added instead of enlarging a detection section of a tracking error signal. In a section where no pit is formed, a tracking error signal to be detected is sequentially output, and in the other section, the tracking error signal immediately before the section is held or the tracking error signal is output as 0, and a series of signals is output. Signal generation circuit for generating a tracking signal by smoothing the tracking signal, an offset applying circuit for applying an offset to the tracking signal, and a recording condition (a disc type to be used or a recording speed or a combination of a disc type and a recording speed). A storage circuit for storing information on the appropriate value of the offset, A control circuit for reading information on an appropriate value of the corresponding offset from the storage circuit according to the type of disk or recording speed to be used or the type of disk and the recording speed, and setting the offset value of the offset providing circuit to the corresponding value. Then, tracking control is performed using the smoothed tracking signal to which an offset has been added.

Further, still another optical disk apparatus according to the present invention employs both the extension of the tracking error signal detection section and the provision of an offset signal. The recording pulse is turned on, the pit formation is started, and the level of the return light is increased. In a section from an appropriate point in time after the peak exceeds the peak to the next turn on of the recording pulse, the detected tracking error signal is sequentially output, and in the remaining section, the tracking error signal immediately before the section is held or Set tracking error signal to 0
And a tracking signal generating circuit for smoothing this series of signals to generate a tracking signal, an offset providing circuit for providing an offset to the tracking signal, and storing information on an appropriate value of an offset according to a recording condition. And a control circuit that reads information on the appropriate value of the corresponding offset from the storage circuit in accordance with the recording condition and sets the offset value of the offset providing circuit to a corresponding value according to the recording condition. In addition, tracking control is performed using a tracking signal to which an offset has been added. In this case as well, a control circuit for controlling the start point of the tracking error signal detection section can be further provided.

[0015]

(Embodiment 1) An embodiment of the present invention will be described. FIG. 5 shows a configuration of a part for performing tracking control in the optical disk recording apparatus of the present invention. The recording pulse is ALPC (Automatic Laser Power Control)
After the light output is stabilized by the circuit 30, the light is supplied into the optical head 32 to drive the laser diode. The recording laser light 20 output from the laser diode is converged by the objective lens 22 and applied to the recording surface of the optical disc 10 such as a CD-R, and the pits are formed by changing the dye layer constituting the recording layer. Record information. At this time, the return light of the recording laser light 20 reflected by the optical disc 10 is:
The light enters the objective lens 22 and is received by a light receiving element in the optical head 32. The received light signal is sent to the signal reproduction processing circuit via the RF amplifier 34, and the signal reproduction processing is performed.

The light receiving signal is input to a tracking signal generating circuit 36, an appropriate section is extracted by a sample and hold circuit 38 therein, a tracking error signal is detected by a tracking error detecting circuit 40, and a low pass filter 42 detects the tracking error signal. The tracking signal is generated by smoothing. The tracking signal is input to the servo circuit 44. The servo circuit 44 is composed of, for example, a digital servo circuit, and performs tracking control by driving a tracking actuator in the optical head 32 in a direction in which the absolute value of the tracking signal decreases.

The sampling pulse generating circuit 46 processes the recording pulse to generate a sampling pulse used in the sample and hold circuit 38. The pulse section (sampling time) of the sampling pulse is variably controlled in accordance with recording conditions such as the type of disk and the recording speed (linear velocity of disk and recording speed magnification).

FIG. 6 shows a configuration example of the sample-and-hold circuit 38 and the tracking error detection circuit 40. The photodetector 48 is formed of a four-division PIN photodiode and receives return light from the optical disk. Here, a case where a push-pull method is used as a tracking control method will be described. The light receiving signals A and D output from the light receiving elements that receive the return light from the portion near the inner circumference of the track being recorded among the light receiving elements of the photodetector 48 are added, and A +
D is input to the sample and hold circuit 38. Further, the light receiving signals B and C output from the light receiving element that receives the return light from the portion near the outer periphery of the track being recorded are added and input to the sample and hold circuit 38 as B + C.

The sample and hold circuit 38 includes a switch SW
1, while the switch SW2 is turned on (sample hold time), the light receiving signals A + D, B + C are passed through as it is, and while the analog switches SW1, SW2 are turned off (hold time), the light receiving signals A + D, B
+ C is held in the holding capacitors C1 and C2. The sampled and held light receiving signal is output via buffer amplifiers 50 and 52. This output signal is subtracted by a subtractor 54 constituting the tracking error detection circuit 40, and the tracking error signal (B
+ C)-(A + D).

Switch SW of sample and hold circuit 38
FIG. 7 shows a configuration example of a sampling pulse creation circuit 46 for creating a sampling pulse for switching control of SW1 and SW2. Sampling pulse generation circuit 46
Delays the recording pulse by the delay time switching circuit 56. Various delay times are set in the delay time switching circuit 56, and the delay times are switched according to recording conditions such as a disc type and a recording speed. The delay pulse output from the delay time switching circuit 56 and the inverted pulse obtained by inverting the recording pulse by the inverter 58 are added by the OR circuit 59 to generate a sampling pulse. The signal waveforms of the respective parts (a) to (d) of the sampling pulse generation circuit 46 are shown in FIGS.
(D). The delay time of the delay pulse (b) forms a hold section of the sample and hold circuit 38, and the hold time and the sampling time are switched by switching the delay time.

Each part (a) of the circuit shown in FIGS.
The signal waveforms of (d) and (e) are shown in FIGS.
(E). The same symbols are used for parts common to FIG. The light receiving signals A + D and B + C are as shown in (e). When the remaining light from the inner track adjacent to the track being recorded is affected by the residual heat, the inner light receiving signal A + D ( (Dotted line) indicates the light receiving signal B + C on the outer circumference
(Solid line), the signal level decreases. The sampling pulse (d) rises at an appropriate timing after the light receiving signal of the return light within the ON period of the recording pulse (a) has passed its peak, and falls when the recording pulse (a) turns on next. The rising timing of the sampling pulse (d) varies according to the recording conditions, and the falling timing is fixed. Then, in a section (sampling time) in which the sampling pulse (d) rises, the switches SW1 and SW2 in FIG. 6 are turned on (connected to the contact point a) and pass the light receiving signals A + D and B + C as they are, and the sampling pulse (d) is changed. Switches SW1 and SW2 are turned off (connected to contact b) during the falling section (hold time)
Then, the light receiving signals A + D and B + C are cut off, and the light receiving signals immediately before the cutoff are held in the capacitors C1 and C2.

In the light receiving signals A + D and B + C in the OFF period of the recording pulse, the light receiving signals in the direction in which the laser beam 20 is shifted from the track being recorded relatively increase. That is, if the laser beam 20 shifts toward the inner side, the light receiving signal A + D on the inner side increases, and if the laser beam 20 shifts toward the outer side, the light receiving signal B + C on the outer side increases. On the other hand, the decrease amount of the received light signal A + D due to the residual heat from the inner track in the ON period of the recording pulse is more influenced by the residual heat as the laser beam 20 shifts to the inner peripheral side with respect to the track being recorded. (The level of A + D decreases), and decreases as the position shifts toward the outer peripheral side because the influence of residual heat decreases.
The level of + D increases. ).

As described above, the relationship between the direction of the shift of the laser beam 20 from the track being recorded and the increase / decrease of the light receiving signals A + D and B + D is opposite to each other between the OFF period and the ON period of the recording pulse. However, the fluctuation amount of the level of the light receiving signals A + D and B + D is usually much larger in the fluctuation amount due to the residual heat from the inner peripheral track than in the tracking error itself. Therefore, by appropriately setting the length of the ON section of the recording pulse incorporated in the sampling time, a tracking signal (tracking error signal smoothed by the low-pass filter 42) for the deviation of the laser beam 20 from the recording track (B + C)
The influence of the residual heat becomes dominant in the fluctuation of-(A + D).
That is, when the laser beam 20 deviates inward with respect to the track being recorded, the amount of the light receiving signal (A + D) in the on-period of the recording pulse decreases more than the amount of increase in the light receiving signal (A + D) in the off-period of the recording pulse. Since the amount appears larger, the tracking signal (B + C)-(A + D) increases, and when the laser beam 20 is shifted to the outer peripheral side with respect to the track being recorded, the light receiving signal (B + C) in the off section of the recording pulse is reduced. The tracking signal (B + C)-(A + D) decreases because the increase amount of the light receiving signal (A + D) in the ON period of the recording pulse appears larger than the increase amount.

Here, the servo circuit 44 searches for a point where the absolute value of the tracking signal (B + C)-(A + D) becomes minimum (that is, the moving direction of the laser beam 20 and the tracking signal (B + C)-(A + D)). Since the control content is set so as to constantly detect the relationship between the increase and decrease of the absolute value and move the laser beam 20 in the direction in which the absolute value decreases, the tracking signal (B + C)-(A + D) is reduced. The laser beam 20 moves to the outer peripheral side with respect to the center line 28 of the track in order to perform the operation. When the laser beam 20 moves to the outer peripheral side, the influence of the residual heat from the inner peripheral side of the track decreases, so that the light receiving signal (A + D) increases, and the tracking signal (B
+ C)-(A + D) decreases. However, the light receiving signal (A + D) with respect to the amount of movement of the laser beam 20 in the outer peripheral direction.
Increases gradually toward the outer periphery, whereas the light receiving signal (B +
C) gradually increases due to the tracking error as the laser beam 20 moves in the outer circumferential direction, so that the tracking signal (B + C)-(A + D) changes from decreasing to increasing at a certain position.

Therefore, the servo circuit 44 converges to a state where the laser beam 20 is offset to a point where the tracking signal (B + C)-(A + D) becomes minimum. At this time, the offset amount of the laser beam 20 varies depending on the length of the ON section of the recording pulse incorporated in the sampling time. Therefore, by appropriately setting the length of the ON section of the recording pulse incorporated in the sampling time according to the recording conditions (changing the rising timing of the sampling pulse), the pit can be correctly formed on the center line of the recording track. .

FIG. 9 shows the relationship between the tracking error balance and the pit jitter when recording is performed with various tracking error balances on a high-density disc having a track pitch of 1.15 μm in which the thickness of the dye layer is changed. here,
The tracking error balance is a value represented by the following equation for the tracking error signal shown in FIG.

Tracking error balance = [(A−
B) / (A + B)] × 50% In FIG. 9, the film thickness is 1
Is the thickest, and becomes thinner in the order of 1, 2, 3, 4, and 5. It can be seen that the larger the film thickness, the more the tracking error balance value when the pit jitter is minimized from 0% due to the residual heat of the adjacent inner peripheral track.
Therefore, the hold section is shortened (the delay time of the delay time switching circuit 56 in FIG. 7 is shortened) as the film thickness increases, so that the offset amount of the tracking signal is increased. By doing so, pits can be correctly formed on the center line of the track regardless of the film thickness.

In general, a cyanine-based disk has a larger thickness than a phthalocyanine-based disk and is more affected by residual heat. Therefore, a cyanine-based disk generally has a larger offset amount than a phthalocyanine-based disk.

When the offset amount is changed according to the recording speed, the higher the recording speed, the larger the residual heat from the adjacent inner circumferential track. Therefore, the higher the recording speed, the greater the offset amount. When neither high-density recording nor high-speed recording is performed, the offset amount can be set to zero. At the time of reproduction, the tracking error signal is passed through all sections (not held). Also,
The gains of the tracking servo and the focus servo are set high during reproduction and low during recording to prevent the loop from being saturated during recording.

(Embodiment 2) FIG. 11 shows another embodiment of the optical disk reproducing apparatus of the present invention. Portions common to those in FIG. 5 use the same reference numerals or omit illustration. Variable resistors R1, R2, R3, and R4 having variously set resistance values are arranged in parallel in the offset imparting circuit 60. One end of each variable resistor R1, R2, R3, R4 is connected to an analog switch S11, S12, S1 respectively.
3, and grounded via S14, and the other end is commonly connected to a non-inverting input terminal of an operational amplifier constituting a subtractor 54 of the tracking error detection circuit 40. Switch S11,
Depending on which of S12, S13 and S14 is turned on,
Light receiving signal B + C input to the non-inverting input terminal of the operational amplifier
And the offset amount changes.

Switches SW11, SW12, SW13, SW for giving an optimum offset according to various recording conditions such as a disc type and a recording speed are provided in the storage circuit 64.
14 on / off information is stored. Control circuit 62
Reads ON / OFF information of the corresponding switches SW11, SW12, SW13, SW14 from the storage circuit 64 in accordance with the set recording conditions, and reads out the switches SW11, SW
12, SW13 and SW14 are controlled to the corresponding states.
Thereby, pits can be correctly formed on the center line of the track under any recording conditions. In addition,
The sample and hold circuit 38 allows the tracking signal to pass in the off period of the recording pulse or in the period where no pit is formed, and holds the tracking error signal in the on period of the recording pulse or the period where the pit is formed. Alternatively, the pits can be more accurately formed on the center line of the track by using the variable control of the sampling time and the hold time according to the recording conditions described in the first embodiment.

In each of the above embodiments, the tracking error signal value can be set to 0 in the section for holding the tracking error signal instead of holding the tracking error signal immediately before. When the tracking control according to the present invention is realized by digital servo, an offset value can be stored in a memory as a digital value, and a value corresponding to a recording condition can be read and used. . In the above-described embodiment, the case where the groove recording is performed has been described. However, the present invention can be applied to the case where the land recording is performed. Also,
The present invention can be applied to a case where a tracking error detection method other than the push-pull method is used. The present invention can also be applied to recording on various optical disks other than CD-R.

[Brief description of the drawings]

FIG. 1 is a diagram showing an embodiment of an optical disk recording method according to the present invention, and is an operation waveform diagram of the circuits of FIGS. 5 and 6;

FIGS. 2A and 2B are a plan view and a cross-sectional view illustrating a state in which pits are formed deviated from a center line of a track due to residual heat from an inner circumferential track.

FIG. 3 is a characteristic diagram showing a heat distribution in a normal direction of a track during recording.

FIG. 4 is a diagram showing an operation waveform diagram at the time of recording and a plan shape of a pit to be formed.

FIG. 5 is a diagram showing an embodiment of the optical disc recording apparatus of the present invention, and is a block diagram showing a configuration of a portion for performing tracking control.

FIG. 6 is a circuit diagram showing a configuration example of a sample hold circuit and a tracking error detection circuit of FIG. 5;

FIG. 7 is a circuit diagram illustrating a configuration example of a sampling pulse generation circuit of FIGS. 5 and 6;

FIG. 8 is an operation waveform diagram of the circuit of FIG. 7;

FIG. 9 shows a track pitch obtained by changing the thickness of a dye layer.
FIG. 7 is a characteristic diagram showing a relationship between a tracking error balance and a pit jitter when recording is performed on a 15 μm high-density disc with a different tracking error balance.

FIG. 10 is a waveform diagram of a tracking error signal for explaining a tracking error balance.

FIG. 11 is a diagram showing another embodiment of the optical disc recording apparatus of the present invention, and is a block diagram and a circuit diagram showing a configuration of a portion for performing tracking control.

[Explanation of symbols]

Reference Signs List 10 optical disk 14 groove 16 land 20 laser light (light beam) 24 pit 26 optical axis center of laser light 28 center line of track 36 tracking signal generation circuit 56 delay time switching circuit (changes start time of tracking error signal detection section Circuit) 60 Offset giving circuit 62 Control circuit 64 Storage circuit T Current recording track T 'Inner circumference track adjacent to current recording track

Claims (7)

(57) [Claims] An optical beam is irradiated along a track formed by grooves or lands formed on a recording surface of an optical disk, and pits are sequentially formed from an inner peripheral side to an outer peripheral side of the optical disk to form a mark. In an optical disk recording method for recording information by a long recording method, an optical axis center of the light beam is moved from a center line of the track by a predetermined amount in a disk outer peripheral direction , that is, a residual heat from an adjacent inner peripheral track.
The tendency to form pits shifted to the inner circumference side is canceled
Pits are correctly formed on the center line of the track
An optical disk recording method for performing tracking control in a state where the optical disk is offset by an amount that can be performed. 2. A method of irradiating a light beam along a track formed by grooves or lands formed on a recording surface of an optical disk to form pits sequentially from an inner peripheral side to an outer peripheral side of the optical disk to mark the mark. In an optical disc recording method for recording information by a long recording method, a pit is formed within an ON section of a recording pulse, and an appropriate section after a level of a return light exceeds a peak and an OFF section of the recording pulse during an OFF section. An optical disc recording method for performing tracking control using a tracking error signal detected in an appropriate section. 3. The optical disk recording method according to claim 2, wherein a length of a detection section in an ON section of the recording pulse in the detection section of the tracking error signal is made variable according to a recording condition. 4. A mark is formed by irradiating a light beam along a track formed by grooves or lands formed on a recording surface of an optical disk to form pits sequentially from an inner peripheral side to an outer peripheral side of the optical disk. In an optical disc recording apparatus that records information by the long recording method, the recording pulse is turned on, pit formation is started, and the time from the appropriate point after the level of the return light exceeds the peak until the recording pulse is turned on next time In the section, the tracking error signal to be detected is sequentially output, and in the remaining section, the tracking error signal immediately before the section is held or the tracking error signal is output as 0, and this series of signals is smoothed to obtain the tracking signal. A tracking signal generation circuit for generating the tracking signal, and performing tracking control using the generated tracking signal. Disk recording device. 5. A mark is formed by irradiating a light beam along a track formed by grooves or lands formed on a recording surface of an optical disc to form pits sequentially from the inner circumference to the outer circumference of the optical disc. In an optical disk recording apparatus for recording information by a long recording method, a tracking error signal is sequentially output during a section where a recording pulse is off or a section where a pit is not formed, and the remaining section is a section of the section. A tracking signal generation circuit that holds the immediately preceding tracking error signal or outputs the tracking error signal as 0, and generates a tracking signal by smoothing this series of signals; and an offset providing circuit that provides an offset to the tracking signal. A storage circuit for storing information on an appropriate value of an offset according to a recording condition; A control circuit that reads information on the appropriate value of the corresponding offset from the storage circuit according to the recording condition and sets the offset value of the offset providing circuit to a corresponding value, wherein the smoothed and the offset is provided. An optical disk recording device that performs tracking control using a tracking signal obtained. 6. A mark is formed by irradiating a light beam along a track formed by grooves or lands formed on a recording surface of an optical disk to form pits sequentially from an inner side to an outer side of the optical disk. In an optical disc recording apparatus that records information by the long recording method, the recording pulse is turned on, pit formation is started, and the time from the appropriate point after the level of the return light exceeds the peak until the recording pulse is turned on next time In the section, the tracking error signal to be detected is sequentially output, and in the remaining section, the tracking error signal immediately before the section is held or the tracking error signal is output as 0, and this series of signals is smoothed to obtain the tracking signal. A tracking signal generating circuit for generating the tracking signal, an offset providing circuit for providing an offset to the tracking signal, A storage circuit for storing information on an appropriate value of an offset according to a condition; and reading information on an appropriate value of an offset from the storage circuit according to a recording condition and setting an offset value of the offset providing circuit to an appropriate value. An optical disc recording apparatus, comprising: a control circuit for performing tracking control using the smoothed and offset tracking signal. 7. The apparatus according to claim 4, further comprising a circuit for changing a start time of a tracking error signal detection section.
Or the optical disk recording device according to 6.