JP2002123941A - Optical disk recorder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an optical disk recorder that can obtain an optimum laser power in recording by decreasing number of OPC(Optimum Power Control) performing times. SOLUTION: A CPU 17 has a 1st discrimination means 171 that discriminates to which of preset temperature ranges the ambient temperature detected at a trial write belongs, a management means 172 that stores an optimum laser power to each of the temperature ranges to manage them, a 2nd discrimination means 171 that discriminates to which of the temperature ranges a temperature range with the detected ambient temperature belonging thereto belongs at start of appending new records on the same recording medium, a reference means 173 that references the optimum laser power corresponding to the temperature range with the detected ambient temperature belonging thereto when the 1st or 2nd discrimination means 171 detects that the temperature range with the detected ambient temperature belonging thereto exists in any of the temperature ranges, and a performing means 174 that performs the OPC when the 1st or 2nd discrimination means 171 detects that the temperature range with the detected ambient temperature belonging thereto does not exist in any of the temperature ranges.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a CD-R (Compact Disc Re-record) of a write-once recording medium.
able) CD-RW media and phase-change recording media
(Com-pact Disc Rewritable
e) The present invention relates to an optical disk recording apparatus for setting LD power (laser power) when recording on a medium or the like.

[0002]

2. Description of the Related Art In an optical disk recording apparatus for recording data on a CD-R medium or a CD-RW medium, the L at the time of recording is determined.
A test writing area (Power Car) prepared in advance on the medium for determining the D power (laser power)
In general, test writing is performed using the “Iblation Area”, and recording is performed in the data area of the optical disk under the obtained recording condition using the optimum LD power value obtained from the result. Optimal LD using this trial writing area
A series of methods for obtaining the power value is OPC (Opti-mu).
m Power Control). The trial writing area and the basic method of OPC are described in Philips and Sony's Co-mpac.
t Disc Recordable standard (Orange
eBook standard, Orange Book standard).

According to the Orange Book standard, up to 99 tracks can be recorded on one optical disc. At the same time, 100 times more than the maximum number of tracks in the trial writing area prepared on the optical disk are secured on the medium. This allows up to 100 O
It is a rule that the PC can execute. However, a write-once recording method called packet recording has recently been developed. In this case, recording is performed in packet units, and the number of packets is not limited. Therefore, there is a possibility that the number of times of recording far exceeds the limit of the number of times of performing 100 OPCs.

[0004] Therefore, there is a drawback that if trial writing is performed for each packet recording, only 100 packet recordings can be additionally recorded. Therefore, as a method of reducing the number of OPC executions and suppressing the consumption of the test writing area in the optical disk recording apparatus, the optimum LD power value obtained from the OPC execution results is stored and managed in a nonvolatile memory, and the OPC execution is performed after the next recording Is performed instead of executing the optimum LD power value managed by the nonvolatile memory.

FIGS. 6A and 6B are diagrams showing a conventional control method for reducing the number of OPC executions. In the Orange Book standard, the PMA (Prog)
A disc-specific six-digit number called a Disc ID (Disc Identification Number) can be assigned to each disc in the ram Memory Area area. D
The iscID is usually a random number. This DiscID
Is stored in the management table as management information in correspondence with the Disc ID and the rotation speed obtained from the OPC execution result, and the optimum LD power value stored in the management table is stored each time recording is performed. , There is a method for performing the OPC instead.

FIG. 6A shows an example of management information in the case of an optical disk recording apparatus capable of three types of recording speeds of 1X, 2X, and 4X. Three slots of "optimum LD power value for 1X recording", "optimum LD power value for 2X recording", and "optimum LD power value for 4X recording" are provided corresponding to the Disc ID. The result of OPC execution at the time is “optimal LD power value for 1X recording” and the result of OPC execution at 2X recording is “optimal LD power value for 2X recording”
Then, the result of the OPC at the time of 4X recording is stored in the slot of "optimum LD power value for 4X recording". Further, such management information is stored in a nonvolatile memory, and the management information of FIG. 6A is maintained even when the power of the optical disk recording device is turned off.

When the optical disc recording apparatus performs OPC at the start of recording using the management information, the optical disc recording apparatus registers the optimum LD power value, which is the result of the OPC, together with the Disc ID in the slot of the corresponding rotation speed in the management information. After that, when recording the same disk and the same rotation speed, instead of performing OPC each time, the management table is referred to, and the disc ID and the rotation speed are used as keys and stored in the corresponding slot in the table. By performing recording using the set optimum LD power value, it is possible to avoid performing OPC.

FIG. 6B shows the management information 3 shown in FIG.
4 shows an example of a management table in which individual pieces are managed in a table shape. In the same figure, “502643”, “990011”,
Optimal L for three DiscIDs of "134300"
The D power is tabulated as management information. "5
02643 ”includes the result of performing OPC at the time of 4X recording on the disc,
OPC in the slot of "Optimal LD power value for 4X recording"
A0h indicating the optimum LD power value obtained by the execution is stored. "Optimal LD power value for 1X recording", "2
00h is stored for the “optimum LD power value for X recording”, which indicates that OPC has not been performed for 1X recording and 2X recording. Similarly, for the DiscID of “990011”, the optimum LD power value for 2X recording 64h is registered as the OPC result, and for the DiscID of “134300”, the optimum LD power value for 1X recording 32h is registered as the OPC result.

When an optical disk recording device is loaded with a disk having a Disc ID of "502643" and 4X recording is started, the optical disk recording device refers to a management table (FIG. 6B) stored in a non-volatile memory. 50264
It is determined whether "3" is already registered in the management table. DiscI of “502643” in the management table
As shown in FIG. 6B, A0h is already registered in the 4X recording slot having D, so the optical disc recording apparatus adopts this value as recording power instead of executing OPC, and Set to an encoder (described later). During the recording operation, the set recording power value is
After being converted into an analog signal through a D / A converter in the encoder, an LD in a pickup unit (described later) is driven through an LD driver (described later).

According to the table for managing the optimum LD power value using the above-mentioned Disc ID, for recording on the same disk and the same rotation speed, if the optimum LD power value of the corresponding rotation speed in the management table is already registered. By adopting this as a recording power value (that is, an optimum laser power value), it is possible to avoid executing OPC every time recording is performed. Therefore, if the recording unit is small as in packet recording and the rotation speed is the same no matter how many times the recording operation is performed on the same disk, simply refer to the optimum LD power value from the table at the start of recording. Thus, further consumption of the test writing area can be suppressed. Thus, the method described above is an excellent method.

However, the management table (FIG. 6)
The value stored in (b)) is D / in the CD encoder.
This is a digital value set in the A converter. Therefore, when the temperature environment changes and affects the output performance of the LD element, a desired LD power value may not always be emitted from the LD in the pickup unit.

FIG. 7 is a graph showing an example of a temperature characteristic of the LD power showing a relationship between an ambient temperature of the LD and an actual LD power. From FIG. 7, it can be seen that when a certain input of the D / A converter is given, the LD is actually changed due to a change in the ambient temperature.
It is shown that the power emitted from is affected.
In the graph of FIG. 7, while the LD power value at 0 ° C. was 15 mW, the LD power value at 55 ° C. was 13 mW.
This indicates that a difference of about 2 mW is generated between the two. This temperature characteristic of the LD power affects the power margin of the recording medium.

FIG. 8 is a graph showing the relationship between the recording power at the time of 4X recording on a certain CD-R medium and the block error rate (number of errors / second) at the time of reproduction after recording. As shown in the graph of FIG.
In the case of R media and CD-RW media, the power at the time of recording greatly affects the error rate at the time of reproduction. When the block error rate is 200, the LD power at the time of recording is 13.5 mW to 14%. The range of 0.5 mW is a block error rate of 200 or less and the optimum LD
Power value. Therefore, when the LD power during recording is 13.
With a value in the range of 5 mW to 14.5 mW, it is possible to reproduce recorded data on a CD-R medium and a CD-RW medium at a good error rate. However, there is a temperature characteristic between the ambient temperature of the LD in FIG. 7 and the actual LD power. For example, when OPC is performed at 0 ° C. and the resulting optimum LD power value is 14 mW, 14 mW
Is registered in the management information (FIG. 6A). According to the above-mentioned conventional technique, when recording on the same medium thereafter, the optical disk recording apparatus sets 14 mW to the CD encoder, and the analog signal that is the D / A conversion output of the CD encoder is LD.
It is input to the pickup unit via the driver.
At this time, if the ambient temperature has changed to 55 ° C. instead of 0 ° C., even if the output of the LD driver is the same, because of the temperature characteristic between the ambient temperature and the LD power (FIG. 7), The LD power value emitted from the LD is reduced by 2 mW to 12
mW. From the characteristics in FIG. 8, 12 mW is 13.5.
Since the value is outside the range from mW to 14.5 mW, this L
When the medium recorded with the D power value is reproduced, the error rate becomes about 600 from FIG. 8, and a good reproduction cannot be obtained.

[0014]

As described above, in the conventional optical disk recording apparatus, when the ambient temperature changes during recording, the actual LD power value becomes lower than the temperature when OPC is performed. There is a problem that the optimum recording condition cannot be obtained due to the dependence.

In this optical disk recording apparatus, it is required to be able to reduce the number of OPC operations and to obtain an optimum laser power value at the time of recording in consideration of the temperature dependence of the laser power value.

The present invention satisfies this demand by using OPC
It is an object of the present invention to provide an optical disk recording apparatus capable of reducing the number of executions and obtaining an optimum laser power value at the time of recording in consideration of the temperature dependence of the laser power value.

[0017]

In order to achieve the above object, an optical disk recording apparatus according to the present invention has a central processing unit for controlling the whole, and the central processing unit uses a test writing area in a recording medium. An optical disk recording apparatus that obtains an optimum laser power for a recording medium from a result of test writing, wherein a central processing unit determines which of a plurality of preset temperature categories the ambient temperature detected at the time of test writing belongs to. Determination means, management means for storing and managing the optimum laser power for each of a plurality of temperature sections, and when performing additional recording on the same recording medium, the temperature section to which the ambient temperature detected at the start of recording belongs is one of the plurality of temperature sections. A second determining means for determining whether or not the temperature is present in the plurality of temperature categories; and determining that the temperature category to which the ambient temperature belongs is present in any of the plurality of temperature categories. Has reference means for referring to the optimum laser power corresponding to the existing temperature section, and OPC executing means for executing OPC when it is determined that the temperature section to which the ambient temperature belongs does not exist in any of the plurality of temperature sections. It was decided that.

Thus, it is possible to obtain an optical disk recording apparatus capable of reducing the number of times of performing the OPC and obtaining an optimum laser power value at the time of recording in consideration of the temperature dependency of the laser power value.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An optical disk recording apparatus according to a first aspect of the present invention has a central processing unit for controlling the whole.
The central processing unit is an optical disk recording device that obtains the optimum laser power for the recording medium from the result of the test writing using the test writing area in the recording medium, and the central processing unit sets the ambient temperature detected during the test writing in advance. First determining means for determining which of the plurality of temperature sections belongs to, managing means for storing and managing the optimum laser power for each of the plurality of temperature sections, and detecting at the start of recording when additional recording on the same recording medium is performed. Second determining means for determining whether the temperature section to which the ambient temperature belongs is present in any of the plurality of temperature sections, and determining that the temperature section to which the ambient temperature belongs is present in any of the plurality of temperature sections. In some cases, the reference means that refers to the optimum laser power corresponding to the existing temperature section, and the temperature section to which the ambient temperature belongs O when it is determined not to exist in
OPC executing means for executing a PC.

With this configuration, the ambient temperature detected at the time of test writing can be divided according to a plurality of preset temperature divisions, and the divided ambient temperature and the optimum laser as an OPC execution result corresponding to the ambient temperature are obtained. Since the power value can be recorded and managed, when the ambient temperature at the time of recording is the above classified ambient temperature, the optimum laser power corresponding to the ambient temperature is searched without executing OPC, and the When the ambient temperature is not the above divided ambient temperature, OPC is executed, so that the number of times of OPC execution can be reduced as a whole and an optimum laser power value can be obtained at the time of recording.

Hereinafter, an embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIG.

(Embodiment 1) FIG. 1A is a block diagram showing an optical disk recording apparatus according to Embodiment 1 of the present invention. 1A, reference numeral 1 denotes an optical disk as a recording medium on which data is recorded, 2 denotes a feed motor for moving a pickup unit 4 described later, 3
Is a spindle motor for rotating the optical disk 1, 4 is a pickup unit for reading data, and 5 is a laser diode (L) built in the pickup unit.
D) an LD driver for driving D), 6 a feed motor driver for driving the feed motor 2, 7 a spindle motor driver for driving the spindle motor 3, 8 an actuator driver for driving the pickup unit 4,
Reference numeral 9 denotes a read amplifier that processes an optical signal obtained from the pickup unit 4.

Reference numeral 10 denotes a CD encoder for controlling the LD driver 5, and reference numeral 11 denotes a CD-R for encoding data.
OM encoder, 12 is a buffer memory storing data to be recorded, 13 is an ATIP detector for inputting a signal from the read amplifier 9, 14 is a CD-ROM decoder for demodulating a CD signal, and 15 is a C-ROM for performing CD servo.
D servo processor, 16 is system bus, 17 is CP
U (central processing unit), 18 is a ROM, 19 is a main memory, 20 is a non-volatile memory, 21 is an IDE (Integr).
An ATAPI interface unit serving as an interface with an at-ed Drive Electronics bus 22 and an A / D converter 23 for performing A / D conversion of the temperature signal a from the pickup unit 4.

FIG. 1B is a functional block diagram showing function realizing means (means realized by software) in the CPU 17. In FIG. 1B, 171
Is a determining means for performing various determinations (including first and second determining means), 172 is a managing means for storing and managing the optimum laser power for each of a plurality of preset temperature sections, and 173 is an optimal laser power corresponding to the temperature section. Reference means 174 for referring to the laser power is OPC executing means for executing OPC.

Here, the CPU 17 makes logical judgments and calculations in accordance with the flowcharts shown in FIGS. Further, the ROM 18 has a program storage area in which a control program according to the flowcharts shown in FIGS. 4 and 5 and a recording control program for the optical disk recording device are stored. The main memory 19 is used as a storage area necessary for various recording control and reproduction control in addition to a storage area necessary for the control shown in FIGS.

The operation of the thus configured optical disk recording apparatus of FIG. 1 will be described. In FIG.
The CD servo processor 15 servo-controls the feed motor driver 6, the spindle motor driver 7, and the actuator driver 8. The pickup unit 4 has a built-in laser diode (LD),
What drives this is the LD driver 5, which is controlled by the CD encoder 10. CD-ROM encoder 1
Numeral 1 is for acquiring data to be recorded from the buffer memory 12 in which it is stored, performing encoding processing for recording, and inputting the result to the CD encoder 10.

In the reproducing system, optical signals obtained from the optical disk 1 and the pickup unit 4 are signal-processed by a read amplifier 9 and used as a feedback signal to a CD servo processor 15 and an ATIP detector 13
, And the output signal is the CD encoder 10
Is fed back to The CD-ROM decoder 14 is for demodulating a CD signal, performs data demodulation using an output signal of the CD servo processor 15, and stores the result in the buffer memory 12. The buffer memory 12 is a memory for temporarily storing recording data and demodulated data.

These data are exchanged with the host computer via the ATAPI interface unit 21 by communication using the IDE bus 22. The system bus 16 is a data transfer bus in the optical disk device. The temperature signal a is a signal obtained from a temperature sensor in the pickup unit 4, is digitized through the A / D converter 23, and is processed as a digital value by the CPU 17.

FIG. 2 is a graph showing the relationship between the value of the temperature signal a taken into the CPU 17 via the A / D converter 23 and the ambient temperature in the pickup unit 4.

FIG. 2 shows a characteristic that when the temperature rises, the value converted by the A / D converter 23 also increases.
Temperature categories below 1 ° C are classified as “1”, temperature categories ranging from 10 ° C to 40 ° C are defined as “2”, and temperatures exceeding 40 ° C are defined as temperature categories “3”.
And three temperature zones, the values converted by the A / D converter 23 corresponding to the temperatures of 10 ° C. and 40 ° C. are T1 and T1, respectively.
2 is shown.

FIG. 3A is a diagram showing the optimum laser power management information corresponding to the temperature division, and FIG. 3B is a diagram showing a management table in which the optimum laser power management information is tabulated. The temperature division is included in the optimum laser power management information of FIG.
One of the values 1 to 3 is stored corresponding to “3”. In the example of the management table of FIG. 3B, four pieces of optimum laser power management information are registered. For a disc with a Disc ID of 502643, the LD power 9Ah at the time of 4X recording of the temperature category “1” is registered, and
For the 2643 disc, two optimum laser power management information of temperature section “2” and temperature section “3” exist independently, and LD power A0h and 1X recording at 4X recording in temperature section “2”. The LD power 30h at the time, the LD power 66h at the time of 2X recording at the time of the temperature division "3", and the LD power A3h at the time of 4X recording are registered. DiscID
Is 990011, the temperature classification is “2”
The LD power 62h during 2X recording is registered.

FIG. 4 is a flow chart showing the operation of identifying the temperature division from the converted temperature value obtained from the A / D converter 23. The calculation according to this flowchart is:
This is performed by the CPU 17 executing a control program stored in the ROM 18. In FIG. 4, first, the temperature signal a is input to the A / D converter 23 (S1). A / D-convert the temperature signal and store the result in variable T (S
2). Next, the determining means 171 (first determining means) compares the value of the variable T with T1 and T2, and when T <T1, proceeds to step S4, and determines that the temperature class is "1". T1
If ≤T≤T2, the process proceeds to step S5, and the temperature classification is determined to be "2" (S3). If T2 <T, the process proceeds to step S6, and the temperature classification is determined to be "3".

FIG. 5 is a flowchart showing an operation of determining the LD power at the time of recording corresponding to the temperature change using the temperature classification value determined in FIG. In FIG. 5, first, the temperature division is determined according to the flowchart described in FIG. 4 (S11). Next, the determining means 171 determines whether or not the Disc ID already exists in the PMA area of the optical disc to be recorded (S12). If no DiscID is recorded, the optical disc 1 is a completely unrecorded disc, and the process proceeds to step S13. In step S13, the OPC execution means 174 executes OPC to obtain the recording power. Next, the management unit 172 records the Disc ID, which is a random number, in the PMA area (S14), sets the optimum laser power management information, the Disc ID in FIG. 3A, and the temperature classification, and sets the current applicable recording speed (1X). , 2X, 4X), the LD power obtained by OPC is set, and these values are stored in the management table of FIG. 3B (S1).
5).

At step S12, DiscI is added to the PMA area.
If it is determined that D has already been recorded, step S
Move to 16. In step S16, the determination unit 171
Searches the management table shown in FIG. 3B using three of the disc ID, the temperature class, and the recording speed as keys. next,
If the determining means 171 determines that the optimum laser power management information matching all three exists in the management table (S17), the processing shifts to step S18, and the reference means 173 determines the corresponding optimum laser power management information. Is adopted as the recording power by referring to the LD power value stored in the. For example, if the DiscID is 502643 and the temperature division is “3” and the recording speed is 4X, the third column in the management table in FIG. 3B is obtained as the search result in step S16, and the LD in this case is obtained. The power value A3h is adopted as the recording power.

As described above, according to the present embodiment, the first determining means 171 for determining to which of a plurality of preset temperature categories the ambient temperature detected at the time of trial writing belongs.
A management means 172 for storing and managing the optimum laser power for each of a plurality of temperature sections; and a temperature section to which the ambient temperature detected at the start of recording belongs at the time of additional recording on the same recording medium exists in any of the plurality of temperature sections. A second determining means 171 for determining whether or not to perform the determination, and a reference to refer to the optimum laser power corresponding to the existing temperature section when it is determined that the temperature section to which the ambient temperature belongs is present in any of the plurality of temperature sections. Means 173 and an OPC executing means 174 for executing OPC when it is determined that the temperature section to which the ambient temperature belongs does not exist in any of the plurality of temperature sections. Can be divided according to a plurality of temperature classifications, and the divided ambient temperature and O corresponding to the ambient temperature can be classified.
Since the optimum laser power value as a PC execution result can be recorded and managed, if the ambient temperature at the time of recording is the above-described divided ambient temperature, the optimal laser corresponding to the ambient temperature can be obtained without executing OPC. The power is searched, and when the ambient temperature at the time of recording is not the above-described ambient temperature, OPC is executed.
It is possible to reduce the number of times C is performed and to obtain an optimum laser power value during recording.

[0036]

As described above, according to the optical disk recording apparatus of the first aspect of the present invention, there is provided a central processing unit for controlling the whole, and the central processing unit sets a test writing area in the recording medium. An optical disk recording apparatus that obtains an optimum laser power for a recording medium from a result of test writing used, wherein a central processing unit determines to which of a plurality of preset temperature divisions an ambient temperature detected at the time of test writing belongs. A first determination unit, a management unit that stores and manages an optimum laser power for each of a plurality of temperature sections, and a temperature section to which an ambient temperature detected at the start of recording belongs to a plurality of temperature sections during additional recording on the same recording medium. Second determining means for determining whether or not the temperature is present in any of the plurality of temperature categories; and determining that the temperature category to which the ambient temperature belongs is present in any of the plurality of temperature categories. Reference means for referring to the optimum laser power corresponding to the existing temperature section, and OPC executing means for executing OPC when it is determined that the temperature section to which the ambient temperature belongs does not exist in any of the plurality of temperature sections. With this, the ambient temperature detected at the time of test writing can be divided according to a plurality of preset temperature divisions, and the divided ambient temperature and the O corresponding to the ambient temperature can be classified.
Since the optimum laser power value as a PC execution result can be recorded and managed, if the ambient temperature at the time of recording is the above-described divided ambient temperature, the optimal laser corresponding to the ambient temperature can be obtained without executing OPC. The power is searched, and the pickup unit is driven so that the optimum laser power obtained by the search is obtained. When the ambient temperature at the time of recording is not the divided ambient temperature, OPC is executed. It is possible to reduce the number of times and obtain the optimum laser power value at the time of recording.Also, even if a temperature change occurs, the error rate of the recorded optical disk can be kept low and the recording quality can be improved. This has the advantageous effect of being able to perform.

[Brief description of the drawings]

FIG. 1A is a block diagram showing an optical disc recording apparatus according to a first embodiment of the present invention; FIG. 1B is a functional block diagram showing a function realizing means in a CPU;

FIG. 2 is a graph showing a relationship between a value of a temperature signal taken into a CPU via an A / D converter and an ambient temperature in a pickup unit.

3A is a diagram illustrating optimum laser power management information corresponding to a temperature category; FIG. 3B is a diagram illustrating a management table in which the optimum laser power management information is tabulated;

FIG. 4 shows a conversion value of temperature obtained from an A / D converter,
Flow chart showing the operation of identifying the temperature section

FIG. 5 is a flowchart showing an operation of determining an LD power at the time of recording corresponding to a temperature change using the temperature classification value determined in FIG.

6A is a diagram illustrating a conventional control method for reducing the number of OPC executions. FIG. 6B is a diagram illustrating a conventional control method for reducing the number of OPC executions.

FIG. 7 is a graph showing an example of a temperature characteristic of LD power showing a relationship between an ambient temperature of the LD and an actual LD power.

FIG. 8 is a graph showing the relationship between the recording power at the time of 4X recording on a certain CD-R medium and the block error rate (number of errors / second) at the time of reproduction after recording.

[Explanation of symbols]

 Reference Signs List 1 optical disk 2 feed motor 3 spindle motor 4 pickup unit 5 LD driver 6 feed motor driver 7 spindle motor driver 8 actuator driver 9 read amplifier 10 CD encoder 11 CD-ROM encoder 12 buffer memory 13 ATIP detector 14 CD-ROM decoder 15 CD servo Processor 16 System bus 17 CPU 18 ROM 19 Main memory 20 Non-volatile memory 21 ATAPI interface unit 22 IDE bus 23 A / D converter

Claims (1)

[Claims] An optical disk recording apparatus for obtaining an optimum laser power for a recording medium from a result of a test writing using a test writing area in the recording medium; The central processing unit determines which of a plurality of preset temperature categories the ambient temperature detected at the time of test writing belongs to
Determination means, and management means for storing and managing the optimum laser power for each of the plurality of temperature sections, and at the time of additional recording on the same recording medium, the temperature section to which the ambient temperature detected at the time of recording start belongs to the plurality of temperature sections. Second determining means for determining whether the temperature is present in any one of the plurality of temperature categories; and determining that the temperature category to which the ambient temperature belongs is present in any of the plurality of temperature categories. A reference unit for referring to laser power; and an OP for executing OPC when it is determined that the temperature section to which the ambient temperature belongs does not exist in any of the plurality of temperature sections.
An optical disk recording device, comprising: C executing means.