JP2007048359A - Optical recording method, evaluation index acquiring method, optical recording device, micro cpu element, and computer program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an optical recording method that can record information in a short period by reducing the test time before recording, an evaluation index acquiring method, an optical recording device, a one-chip CPU element, and a computer program therefor. <P>SOLUTION: This method records and reproduces the test information making changes of the kinds of recording conditions on a first recording layer 11 and finds out the light radiating conditions suitable to record information on the first recording layer 11. Then, it records and reproduces the test information on second and third recording layers 12, 13 by changing the kinds of recording conditions by less times than in the recording on the first recording layer and finds out the light radiating conditions suitable to record information on the second and third recording layers 12, 13, based on the result of the test for the first recording layer 11 and the result of the test for the second or third recording layer 12, 13. Thus, it can reduce the test time to find the light radiating conditions for the second and third recording layers 12, 13. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to information recording on an optical recording medium having a plurality of recording layers, and in particular, an optical recording method, an evaluation index acquisition method, an optical recording device, and a micro CPU element capable of reducing a test time during information writing. And a computer program.

  2. Description of the Related Art Conventionally, in an optical recording apparatus that records data on a well-known optical recording medium (optical recording medium) such as a DVD using laser light, when data recording is performed on a predetermined recording medium, in general, actual data recording is performed. Prior to this, a recording condition suitable for the recording medium is obtained by test recording using a test recording area provided in the recording medium.

  However, in an optical recording apparatus in which the demand for high-speed and large-capacity recording increases, when recording data on a multilayer optical recording medium having a plurality of recording layers, recording sensitivity, light reflectance, thermal conductivity, etc. Since the recording characteristics are different, it is necessary to obtain a recording pulse condition corresponding to each recording layer.

  As a conventional technique for obtaining such a recording pulse condition, as shown in FIGS. 25 and 26, good recording can be performed for each recording layer in accordance with conditions such as a recording speed for each type of recording medium. A data table in which recording pulse conditions are recorded is stored in advance in a memory of a recording drive (optical recording apparatus), and when data is actually recorded on the recording medium, the recording medium is selected according to the recording medium type, recording layer, and recording speed. A method is generally used in which the recording pulse conditions are read from the data table, set, and recorded.

Also, taking into account individual differences and variations in the recording drive itself, temperature dependency of the laser, etc., a method of adjusting only the recording laser power condition in test recording performed prior to data recording is also generally used. Yes.
JP 2005-100610 A JP 2003-22532 A JP 2004-171740 A JP 2004-247024 A WO2002-029791 JP 2003-178448 A

  However, in the above prior art, the burden on the memory capacity of the finite recording drive is large, and the use of a high-capacity memory leads to an increase in the cost of the recording drive, so the number of recording media that can be handled is limited. The first problem is as follows.

  In addition, recording media and recording drives that cannot be compensated for by recording laser power alone cannot be fully dealt with, and recording media and recording drives that were not previously stored in the memory of the recording drive were released after the release. Some of the “unknown types of optical recording media” such as media are also supported in the form of firmware upgrades, but have a second problem that they cannot be adequately handled.

  Therefore, it is desired to develop a technique for obtaining the optimum recording condition for each recording speed in a short time according to the characteristics of the recording medium for recording data and the recording drive.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide an optical recording method, an evaluation index acquisition method, an optical recording method capable of recording information in a short time by shortening a test time before information recording. To provide a recording apparatus, a one-chip CPU element, and a computer program.

  In order to solve the above-described problems, the present invention provides an optical recording apparatus that records information by irradiating a recording medium composed of a plurality of layers including one recording layer and another recording layer with laser light. An optical recording method for recording and reproducing test information on a test area of each recording layer to derive laser light irradiation conditions, and irradiating the recording medium with laser light using the irradiation conditions to record information. The optical recording apparatus includes a reference recording layer test step for recording and reproducing test information accompanied by a change in recording condition type on the one recording layer, and a test result obtained by the reference recording layer test step. A reference recording layer irradiation condition derivation step for deriving an irradiation condition suitable for recording information on one recording layer based on the number of changes of the test recording condition type performed in the reference recording layer test step. In times, Other recording layer test steps for recording and reproducing test information on other recording layers, test results obtained by the reference recording layer test steps, test results obtained by the other recording layer test steps, Based on the above, there is proposed an optical recording method for executing another recording layer irradiation condition deriving step for deriving an irradiation condition suitable for recording information on the other recording layer.

  According to the optical recording method of the present invention, in the reference recording layer test step, recording and reproduction of test information accompanied by a change in the type of recording conditions is performed on the one recording layer, and the reference recording layer In the irradiation condition deriving step, an irradiation condition suitable for recording information on one recording layer is derived based on the test result obtained in the reference recording layer test step.

  Further, in the other recording layer test step, the test information is recorded and reproduced on the other recording layer with the number of changes smaller than the number of changes of the test recording condition type performed in the reference recording layer test step. Further, in the other recording layer irradiation condition derivation step, the other recording layer is based on the test result obtained by the reference recording layer test step and the test result obtained by the other recording layer test step. Irradiation conditions suitable for recording information on the layer are derived, and information recording on the other recording layer is performed using the irradiation conditions.

  In order to solve the above-described problems, the present invention provides a method in which an optical recording apparatus records information by irradiating a recording medium composed of a plurality of layers including one recording layer and another recording layer with laser light. In addition, optical recording in which test information is recorded on and reproduced from the test area of each recording layer to derive laser light irradiation conditions, and information is recorded by irradiating the recording medium with laser light using the irradiation conditions. The optical recording apparatus comprises: a reference recording layer test step for recording and reproducing test information accompanied by a change in recording condition type on the one recording layer; and a test obtained by the reference recording layer test step. One of a reference recording layer irradiation condition deriving step for deriving an irradiation condition suitable for recording information on one recording layer based on the result, and a test recording condition performed in the reference recording layer test step Types of test records The other recording layer test step for recording and reproducing the test information on the other recording layer, the test result obtained by the reference recording layer test step, and the other recording layer test step An optical recording method is proposed in which, based on a test result, another recording layer irradiation condition deriving step for deriving an irradiation condition suitable for recording information on the other recording layer is proposed.

  According to the present invention, in the reference recording layer test step, recording and reproduction of test information accompanied by a change in recording condition type is performed on the one recording layer, and in the reference recording layer irradiation condition derivation step, Irradiation conditions suitable for recording information on one recording layer are derived based on the test result obtained by the reference recording layer test step.

  Further, in the other recording layer test step, test information is recorded and reproduced in the other recording layer under any one of the test recording conditions performed in the reference recording layer test step. In the other recording layer irradiation condition derivation step, the other recording layer irradiation condition is derived based on the test result obtained by the reference recording layer test step and the test result obtained by the other recording layer test step. Irradiation conditions suitable for recording information on the other recording layer are derived, and information recording on the other recording layer is performed using the irradiation conditions.

  In order to solve the above-described problems, the present invention provides a method in which an optical recording apparatus records information by irradiating a recording medium composed of a plurality of layers including one recording layer and another recording layer with laser light. In addition, optical recording in which test information is recorded on and reproduced from the test area of each recording layer to derive laser light irradiation conditions, and information is recorded by irradiating the recording medium with laser light using the irradiation conditions. The optical recording apparatus comprises: a reference recording layer test step for recording and reproducing test information on the one recording layer under test recording conditions involving a plurality of condition changes; and the reference recording layer test step. A reference recording layer irradiation condition derivation step for deriving an irradiation condition suitable for recording information on one recording layer based on the test results obtained by the above, and the number of test recording conditions used in the reference recording layer test step Condition number Other recording layer test steps for recording and reproducing test information on other recording layers, test results obtained by the reference recording layer test steps, test results obtained by the other recording layer test steps, Based on the above, there is proposed an optical recording method for executing another recording layer irradiation condition deriving step for deriving an irradiation condition suitable for recording information on the other recording layer.

  According to the present invention, in the reference recording layer test step, test information is recorded and reproduced on the one recording layer under test recording conditions involving a plurality of condition changes, and the reference recording is performed. In the layer irradiation condition deriving step, an irradiation condition suitable for recording information on one recording layer is derived based on the test result obtained in the reference recording layer test step.

  Further, in the other recording layer test step, test information is recorded and reproduced on the other recording layer under a condition number smaller than the number of test recording conditions used in the reference recording layer test step. In the recording layer irradiation condition deriving step, information is recorded on the other recording layer based on the test result obtained by the reference recording layer test step and the test result obtained by the other recording layer test step. Appropriate irradiation conditions are derived, and information recording on the other recording layer is performed using the irradiation conditions.

  In order to solve the above-described problems, the present invention provides a method in which an optical recording apparatus records information by irradiating a recording medium composed of a plurality of layers including one recording layer and another recording layer with laser light. In addition, optical recording in which test information is recorded on and reproduced from the test area of each recording layer to derive laser light irradiation conditions, and information is recorded by irradiating the recording medium with laser light using the irradiation conditions. The optical recording apparatus is obtained by a reference recording layer test step for recording and reproducing test information on the one recording layer under a plurality of types of test recording conditions, and the reference recording layer test step. A reference recording layer irradiation condition derivation step for deriving an irradiation condition suitable for recording information on one recording layer based on a test result, and another recording layer test for recording and reproducing test information on the other recording layer Steps and said criteria Based on the test result obtained by the recording layer test step and the test result obtained by the other recording layer test step, other irradiation conditions suitable for recording information on the other recording layer are derived. The recording layer irradiation condition deriving step is executed, and the reference recording layer test step is recorded by the first test information recording step for recording test information on the one recording layer and the first test information recording step. A first test information reproducing step for reproducing the test information, wherein the other recording layer test step includes a second test information recording step for recording the test information in the other recording layer; and the second test information recording step. And a second test information reproduction step for reproducing the test information recorded by the first test information recording step and the first test information reproduction. We propose an optical recording method number than the number of times switching between the step switch between the second test information reproducing step and the second test information recording step is set smaller.

  According to the present invention, in the reference recording layer test step, a first test information recording step for recording test information on the one recording layer under a plurality of types of test recording conditions, and the first test information A first test information reproduction step for reproducing the test information recorded in the recording step is executed by switching a predetermined number of times.

  Further, in the reference recording layer irradiation condition derivation step, an irradiation condition suitable for recording information on one recording layer is derived based on the test result obtained in the reference recording layer test step.

  Further, in the other recording layer test step, a second test information recording step for recording test information in the other recording layer, and a second test for reproducing the test information recorded in the second test information recording step. The information reproducing step is executed by switching the number of times set to be smaller than the number of times of switching in the reference recording layer test step.

  Further, in the other recording layer irradiation condition deriving step, based on the test result obtained by the reference recording layer test step and the test result obtained by the other recording layer test step, the other recording layer is transferred to the other recording layer. Irradiation conditions suitable for recording the information are derived, and information recording on the other recording layer is performed using the irradiation conditions.

  In order to solve the above-described problems, the present invention provides a method in which an optical recording apparatus records information by irradiating a recording medium composed of a plurality of layers including one recording layer and another recording layer with laser light. In addition, optical recording in which test information is recorded on and reproduced from the test area of each recording layer to derive laser light irradiation conditions, and information is recorded by irradiating the recording medium with laser light using the irradiation conditions. The optical recording apparatus includes a reference recording layer test step in which a set of test information recording and reproduction configured by stepwise change of recording conditions is executed on the one recording layer a plurality of times, and the reference recording layer test step A reference recording layer irradiation condition deriving step for deriving an irradiation condition suitable for recording information on one recording layer based on a test result obtained by the recording layer test step; and the other recording layer includes the reference recording layer Test in test step Another recording layer test step for recording and reproducing test information with a smaller number of times than the number of executions of information recording and reproduction set, the test result obtained by the reference recording layer test step, and the other recording Proposed is an optical recording method for executing another recording layer irradiation condition deriving step for deriving an irradiation condition suitable for recording information on the other recording layer based on the test result obtained by the layer test step. .

  According to the present invention, in the reference recording layer test step, a set of recording and reproducing test information configured by stepwise change of recording conditions is executed a plurality of times for the one recording layer, and In the reference recording layer irradiation condition derivation step, an irradiation condition suitable for recording information on one recording layer is derived based on the test result obtained in the reference recording layer test step.

  Further, in the other recording layer test step, the test information can be recorded and reproduced with respect to the other recording layer by a smaller number of times than the number of executions of the test information recording and reproduction set in the reference recording layer test step. And in the other recording layer irradiation condition derivation step, based on the test result obtained by the reference recording layer test step and the test result obtained by the other recording layer test step, Irradiation conditions suitable for recording information on the recording layer are derived, and information recording on the other recording layer is performed using the irradiation conditions.

  In order to solve the above-described problems, the present invention provides a method in which an optical recording apparatus records information by irradiating a recording medium composed of a plurality of layers including one recording layer and another recording layer with laser light. In addition, after recording the test information in the test area of each recording layer, the recorded test information is reproduced to obtain an evaluation index for determining the irradiation condition of the laser beam, and the laser beam is measured using the evaluation index. An evaluation index acquisition method in an optical recording method for adjusting an irradiation condition, wherein the optical recording apparatus records test information by gradually changing a recording condition of a laser power in the one recording layer And at the time of reproducing the test information recorded in the test information recording step, at least any of a phase shift, a length shift and an amplitude shift of the pulse with respect to a change in the recording condition of the laser power An acquisition step of acquiring a change in the pulse width evaluation index including one of them, a step of obtaining a correlation between the change in the power and the change in the pulse width evaluation index, and a recording condition of the laser power in the other recording layer A second test information recording step in which test information is recorded in a stepwise manner, and a pulse width corresponding to a change in pulse width in another recording layer by adapting the result of the second test recording to the correlation. A calculation step for calculating a change relationship of the evaluation index and a step for obtaining an evaluation index for adjusting the pulse width for determining the pulse width condition in the other recording layer using the relationship obtained in the calculation step are executed. We propose an evaluation index acquisition method.

  According to the evaluation index acquisition method of the present invention, the correlation between the change in the laser power in the one recording layer and the change in the pulse width evaluation index, and the pulse width evaluation index for the change in the laser power in the other recording layer A change relationship is calculated, and an evaluation index for adjusting a pulse width for determining a pulse width condition in the other recording layer is obtained using the relationship.

  In order to solve the above-described problems, the present invention provides a method in which an optical recording apparatus records information by irradiating a recording medium composed of a plurality of layers including one recording layer and another recording layer with laser light. In addition, after recording the test information in the test area of each recording layer, the recorded test information is reproduced to obtain an evaluation index of the laser light irradiation condition, and the laser light irradiation condition is adjusted using the evaluation index An evaluation index acquisition method in an optical recording method, wherein the optical recording device records test information by stepwise changing a recording condition of a pulse width in the one recording layer, and An acquisition step of acquiring an evaluation index for laser power adjustment with respect to a change in a recording condition of a pulse width when reproducing the test information recorded in the one recording layer by the test information recording step; A second test information for recording test information by stepwise changing a recording condition of a pulse width in the other recording layer in a stepwise manner. A recording step, a calculation step of calculating a relationship between a change in the evaluation index for laser power adjustment with respect to a change in a pulse width recording condition in another recording layer by adapting the second test recording result to the correlation, and the calculation An evaluation index acquisition method is proposed that executes a step of obtaining a laser power adjustment evaluation index for determining a laser power condition in the other recording layer using the relationship obtained in the step.

  According to the evaluation index acquisition method of the present invention, test information is recorded by gradually changing the recording condition of the pulse width on one recording layer, and the test information recorded on one recording layer is reproduced. At this time, an evaluation index for laser power adjustment with respect to a change in the recording condition of the pulse width is acquired. Furthermore, a correlation between the change in the pulse width and the change in the evaluation index for laser power adjustment is obtained. Further, test information is recorded on the other recording layers while changing the recording conditions of the pulse width step by step, and the recording results are adapted to the correlation so that the recording of the pulse widths in the other recording layers is performed. An evaluation index for laser power adjustment with respect to a change in conditions is calculated.

  In order to solve the above problems, the present invention provides information recording and information reproduction on the recording layer when the optical recording apparatus records information by irradiating the recording layer of the recording medium with laser light. To obtain an evaluation index of the irradiation condition of the laser beam and adjust the irradiation condition of the laser beam using the evaluation index, wherein the optical recording apparatus includes the recording layer A recording step for recording test recording information and / or user data recording information, and reproducing the information recorded by the information recording step, and obtaining a plurality of types of evaluation indices relating to laser light irradiation conditions from the reproduction information A method for obtaining an evaluation index is proposed.

  According to the evaluation index acquisition method of the present invention, information is recorded on the recording layer, and the recorded information is reproduced, and a plurality of types relating to laser light irradiation conditions are determined from the reproduction information and the recording conditions. The evaluation index is acquired.

  In order to solve the above-mentioned problems, the present invention provides an optical recording apparatus comprising means for executing each processing step in the optical recording method, a one-chip CPU element used in the optical recording apparatus, and the optical recording apparatus A computer program for executing the optical recording method by driving a CPU used in the present invention is proposed.

  According to the optical recording method of the present invention, the recording and reproduction of the test information accompanied by the change of the recording condition type is performed on one recording layer, and the one recording layer is recorded based on the test result obtained thereby. Irradiation conditions suitable for recording the information of the test information are derived, and the test information is recorded and reproduced on other recording layers with fewer changes than the number of changes of the test recording condition type performed in the reference recording layer test step. Based on the test result of one recording layer and the test result of the other recording layer, an irradiation condition suitable for recording information on the other recording layer is derived, and using the irradiation condition, Since information is recorded on the recording layer, the test time for deriving the irradiation conditions of other recording layers can be shortened, and the test time before information recording can be shortened to record information in a short time Can do. Furthermore, the recording area used for test recording can be reduced as compared with the conventional case.

  In addition, according to the optical recording method of the present invention, test information is recorded and reproduced with a change in the type of recording condition on one recording layer, and information is recorded on one recording layer based on the test result. Appropriate irradiation conditions are derived, and test information is recorded and reproduced on other recording layers under any one of the test recording conditions performed in the reference recording layer test step. Based on the test result of one recording layer and the test result of the other recording layer, an irradiation condition suitable for recording information on the other recording layer is derived, and the other recording layer is used using the irradiation condition. Since the information recording is performed, the test time for deriving the irradiation conditions of other recording layers can be shortened, and the test time before information recording can be shortened to record information in a short time . Furthermore, the recording area used for test recording can be reduced as compared with the conventional case.

  In addition, according to the optical recording method of the present invention, test information is recorded and reproduced on one recording layer under test recording conditions involving a plurality of condition changes. Irradiation conditions suitable for recording information on the recording layer are derived, and further, test information is recorded and reproduced on other recording layers under a condition number smaller than the number of test recording conditions used in the reference recording layer test step, Based on the test result obtained by the reference recording layer test step and the test result obtained by another recording layer test step, irradiation conditions suitable for recording information on other recording layers are derived, and the irradiation conditions Is used to record information on other recording layers, so the test time for deriving the irradiation conditions of other recording layers can be shortened, and the test time before information recording can be shortened to shorten the information. Record in time Door can be. Furthermore, the recording area used for test recording can be reduced as compared with the conventional case.

  Further, according to the optical recording method of the present invention, when recording and reproducing test information with respect to one recording layer under a plurality of types of test recording conditions, the recording and reproduction are executed by switching a predetermined number of times, Irradiation conditions suitable for recording information on one recording layer are derived based on the test results. Further, when recording and reproducing test information on another recording layer, the recording and reproduction are performed as described above. Irradiation suitable for recording information on other recording layers based on the test result of one recording layer and the test result of the other recording layer. Since the conditions are derived and information recording is performed on the other recording layer using the irradiation conditions, the test time for deriving the irradiation conditions of the other recording layers can be shortened, Reduce test time and get information in less time It is possible to record. Furthermore, the recording area used for test recording can be reduced as compared with the conventional case.

  In addition, according to the optical recording method of the present invention, a set of recording and reproducing test information configured by stepwise change of recording conditions is executed a plurality of times for one recording layer, and based on the test results. Irradiation conditions suitable for recording information on one recording layer are derived, and further, the number of executions of the set of recording and reproducing test information in the test of the one recording layer is smaller than the other recording layers. Test information is recorded and reproduced at a certain number of times, and irradiation conditions suitable for recording information on other recording layers are derived based on the test results of one recording layer and the other recording layers. Since the information recording is performed on the other recording layer using the irradiation condition, the test time for deriving the irradiation condition of the other recording layer can be shortened, and the test time before the information recording is shortened. To record information in a short time Kill. Furthermore, the recording area used for test recording can be reduced as compared with the conventional case.

  Further, according to the evaluation index acquisition method of the present invention, the correlation between the change in the laser power in one recording layer and the change in the pulse width evaluation index, and the pulse width evaluation index for the change in the laser power in the other recording layer Since the change relationship is calculated, and an evaluation index for adjusting the pulse width for determining the pulse width condition in the other recording layer is obtained using the relationship, the pulse width evaluation index in the other recording layer is calculated. Since it is not necessary to perform actual test recording to calculate this pulse width evaluation index, the test time for deriving the irradiation conditions of other recording layers can be shortened, and the test time before information recording And information can be recorded in a short time. Furthermore, the recording area used for test recording can be reduced as compared with the conventional case.

  Further, according to the evaluation index acquisition method of the present invention, with respect to the correlation between the change in the pulse width in one recording layer and the change in the evaluation index for laser power adjustment, the recording condition of the pulse width in the other recording layer is set. The test results of the tests performed in stages are adapted to calculate the laser power adjustment evaluation index for changes in the recording conditions of the pulse width in other recording layers. Since it is not necessary to record information, the test time can be shortened, and the test time before information recording can be shortened to record information in a short time. Furthermore, the recording area used for test recording can be reduced as compared with the conventional case.

  Further, according to the evaluation index acquisition method of the present invention, the test information is recorded by changing the recording conditions in the recording layer step by step, the recorded test information is reproduced, and the reproduction information and the aforementioned Since multiple types of evaluation indices related to the laser light irradiation conditions are acquired from the recording conditions, it is not necessary to record test information for each type of evaluation index, so the test time can be shortened, The test time can be shortened and information can be recorded in a short time. Furthermore, the recording area used for test recording can be reduced as compared with the conventional case.

  Moreover, according to the optical recording apparatus of the present invention, the above optical recording method can be easily realized.

  Furthermore, according to the micro CPU element of the present invention, the above optical recording method can be easily realized.

  In addition, according to the computer program of the present invention, the optical recording method can be easily realized using an arbitrary CPU.

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

  FIG. 1 is a diagram showing a configuration of an optical recording apparatus and a configuration of an optical disc in the first embodiment of the present invention. In the figure, reference numeral 10 denotes an optical disk, which is a known multi-layer optical recording medium such as a DVD, HD-DVD, or Blu-ray disk. In this embodiment, the first recording layer 11 from the position farthest from the laser light irradiation surface, The optical recording medium has three recording layers in the order of the second recording layer 12 and the third recording layer 13. In this embodiment, an optical recording medium having three recording layers will be described. However, information can be recorded / reproduced by the optical recording apparatus 100 using an optical recording medium having two or more recording layers as an optical disc 10. it can.

  An optical recording apparatus 100 includes an optical pickup 110, a laser diode (hereinafter referred to as LD) driver 121, a slicer 122, a demodulation circuit 123, a characteristic value detection unit 124, a one-chip CPU element (hereinafter referred to as a CPU) 125, A memory 127 and an interface (hereinafter referred to as I / F) 128 are provided. Here, only components that are particularly relevant to the present invention will be described.

  Further, the optical recording apparatus 100 is connected with a display unit 131 including a personal computer and a display, and an operation unit 132 including a keyboard.

  The optical pickup 110 includes a laser diode (hereinafter referred to as LD) 111, a photodetector (hereinafter referred to as PD) 112, a collimator lens 113, an objective lens 114, a detection lens 115, and a beam splitter 116. The laser light emitted from the LD 111 passes through the collimating lens 113, the beam splitter 116, and the objective lens 114, and is irradiated onto the optical disc 10. Further, the laser beam reflected by the optical disk 10 passes through the objective lens 114, is reflected by the beam splitter 116, and enters the PD 112 via the detection lens 115. The PD 112 outputs a current having a value corresponding to the amount of incident light.

  The LD driver 121 supplies a drive current to the LD 111 based on the recording signal input from the CPU element 125 to cause the LD 111 to emit light.

  The slicer 122 slices the output current from the PD 112 with a predetermined threshold value, converts it into a binary voltage signal, and outputs it.

  The demodulating circuit 123 is a circuit that demodulates the encoded binary signal output from the slicer 122 and outputs the demodulated signal to the CPU 125. For example, the demodulating circuit 123 outputs 3T to 11T that are binary voltage signals output from the slicer 122. A digital signal obtained by demodulating a signal that has been EFM-modulated with a pulse width of 1 is output to the CPU 125.

  The characteristic value detector 124 receives the current signal output from the PD 112, detects the characteristic value from the reflected light from the optical disk 10 based on this current value, and outputs it to the CPU 125 as digital information. The characteristic value detected from the reflected light may be any characteristic value that depends on the recording laser power and the recording pulse condition and is suitable for optimizing the recording pulse condition. In this embodiment, β, asymmetry (Asymmetry), phase, amplitude, etc. are detected.

  The CPU 125 is a well-known one-chip CPU element, and includes a memory circuit 126 in which a computer program for causing the CPU to operate is stored. Further, the CPU 125 controls a drive mechanism (not shown) to adjust the position, tracking, and focus of the light pickup 110 and to control the rotational drive of the optical disc 10, and based on the data table stored in the memory 127. Then, the information input from the outside is recorded (written) on the optical disc 10, or the information recorded on the optical disc 10 is read and output to the external device. Further, a test at the time of recording information on the optical disc 10 is performed by a process described later to obtain an optimum laser beam condition so that information can be recorded.

  The memory circuit 127 is connected to the CPU 125, and data corresponding to other types of optical disks is recorded in the data table as a strategy table similar to the conventional example.

  The I / F 128 is an interface for connecting the CPU to the external display unit 131 and the operation unit 132, and transfers recording / reproduction information between the external device and the CPU 125.

  In the above configuration, information is recorded on and reproduced from the optical disc 10 using the laser beam output from the LD 111, and information is transmitted to and received from an external device such as a personal computer (PC). The optical recording apparatus 100 records information in the order of the first recording layer 11, the second recording 12, and the third recording layer 13 when recording information on the optical disc 10.

  When recording information on the optical disc 10, the recording information is encoded, and the encoded recording information is processed by the CPU 125, thereby determining a strategy as a recording condition for the optical disc 10, and the strategy is used as an LD driver. In 121, the laser beam is converted into a recording pulse, and laser light pulsed based on the recording pulse is output from the LD 111.

  The LD driver 121 drives the LD 111 based on the input recording pulse. The LD 111 controls the output laser beam in response to the recording pulse, and the controlled laser beam is used for the collimating lens 113, the beam splitter 116, the objective. The optical disk 10 rotating at a constant linear velocity or a constant rotational speed is irradiated through the lens 114, whereby a recording pattern composed of pits and space rows corresponding to desired recording information is recorded on the optical disc 10.

  Further, when information is recorded on the optical disk 10, as is well known, test information is recorded in the test area of the optical disk 10 and reproduced, thereby determining optimum laser light irradiation conditions. In the optical recording apparatus 100 of the present embodiment, the test time for determining the laser light irradiation condition can be shortened compared to the conventional case.

  Hereinafter, a method for determining the irradiation condition of the laser beam in the present embodiment will be described in detail.

  2 and 3 are flowcharts for explaining the recording process to the recording layer in the first embodiment. A computer program for executing this processing is stored in advance in the memory circuit 126 of the CPU 125, and the CPU 125 performs these processing. In this embodiment, the test process when recording information on the first recording layer 11 of the optical disc 10 is substantially the same as the conventional one, but the test process when recording information on recording layers other than the first recording layer 11 is performed. Unlike the test process in the first recording layer 11, the time can be shortened.

  That is, when information is recorded on the first recording layer 11, the process shown in FIG. 2 is executed. In this process, two types of laser power adjustment test recording and a predetermined number of pulse width adjustment test recordings are performed by optimizing the recording laser light intensity (OPC: Optimum Power Control, hereinafter referred to as OPC) as in the prior art. A test under test recording conditions is performed, the recorded information is reproduced (SA1), and a parameter (evaluation index) under the laser light irradiation conditions is detected (SA2). Examples of this parameter include β (Asymmetry), laser beam irradiation power, and pulse phase in the case of DVD. Further, the laser power adjustment test recording is performed by changing the laser power (Wrigte PW) stepwise as shown in FIG. 4, and the pulse width adjustment test recording is similarly performed by changing the pulse width stepwise. When detecting the above parameters, if the strategy table data stored in the memory 127 can be used, it is used, and the strategy table data stored in the memory 127 cannot be used. In the case of the type of optical disk 10, a well-known auto strategy detection process is performed.

  Next, a characteristic relational expression is derived from the obtained parameters (SA3). As this characteristic relational expression, for example, a characteristic relational expression representing the relationship between laser power (Wrigte PW) and β as shown in the graph of FIG. 5, and laser power (Wrigte PW) as shown in the graph of FIG. Characteristic relational expression representing phase correction parameter in relation to pulse phase, pulse phase correction in relation to pulse phase shift (Pluse (Topr, Tlast)) and pulse phase as shown in the graph of FIG. A characteristic relational expression representing the parameter is derived. Here, two types of parameters (evaluation index) from the test information recorded by changing the laser power stepwise, that is, the characteristics representing the relationship between the laser power (Wrigte PW) and β as shown in the graph of FIG. A characteristic relational expression representing a phase correction parameter in the relation between the relational expression and the laser power (Wrigte PW) and the pulse phase as shown in the graph of FIG. 6 is derived.

  Thereafter, the optimum values of the laser power and the pulse width are derived using the parameters obtained from the obtained characteristic relational expression (SA4). Further, it is determined whether or not the optimum value can be applied to record information with a predetermined quality after adjustment at a desired recording speed (SA5). In this adjustment, the laser power adjustment parameter (evaluation index) and the pulse width adjustment parameter (evaluation index) with respect to the stepwise change in the recording conditions of the laser power and the pulse width are used to record information with a predetermined quality. At least one of the laser power and the pulse width of the laser light applied to the recording layer is adjusted so as to have a suitable predetermined value. OPC may be performed for this adjustment.

  As a result of the determination of SA5, if applicable, the process proceeds to SA8, which will be described later. If not applicable, the recording speed is set to a predetermined recording speed or recording is set to stop ( SA6) It is determined whether or not recording is to be stopped (SA7). When the recording is stopped, the process proceeds to SA10 described later, and when the recording speed is set to be lowered, the process proceeds to SA5.

  If the optimum value is applicable to the desired recording speed as a result of the determination of SA5, the determination result, the processing content, the parameter (evaluation index), and the adjustment result information are recorded on the optical disk 10 and stored in the memory 127. Recording is performed in association with the media ID of the optical disc 10 (SA8). As described above, the information can be utilized when recording on the same type of optical disk 10 next time by keeping it as a record. The condition data used for test recording may be recorded in accordance with the above information. Further, the above information may be recorded only on either the optical disc 10 or the memory 127. In addition, information on only one of the judgment result or the processing content accompanying this judgment may be recorded, or information on only one of the parameter (evaluation index) or the adjustment result using the parameter may be recorded. It may be recorded.

  Thereafter, information is recorded on the optical disc 10 using the obtained optimum value (SA9). Next, the determination result and the processing content are displayed on the display unit 131 (SA10), and the information recording on the first recording layer 11 is terminated. Note that only one of the determination result or the processing content accompanying this determination may be displayed on the display unit 131.

  When information is recorded on the recording layers 12 and 13 other than the first recording layer 11, the process shown in FIG. 3 is performed.

  That is, when information is recorded on the recording layers 12 and 13 other than the first recording layer 11, the processing shown in FIG. 3 is executed. In this process, a test with only one type of test recording condition of only laser power adjustment test recording is performed by OPC similar to the conventional one, and the recorded information is reproduced (SB1). ), A parameter (evaluation index) in the laser light irradiation condition is detected (SB2). Laser power adjustment test recording is performed by changing the laser power (Wrigte PW) step by step as shown in FIG.

  Next, a characteristic relational expression is derived from the obtained parameters (SB3). As this characteristic relational expression, for example, a characteristic relational expression representing a phase correction parameter in the relation between the laser power (Wrigte PW) and the pulse phase as shown in the graph of FIG. 8 is derived.

  Thereafter, using the parameters obtained from the characteristic relational expression obtained above and the characteristic relational expression obtained in the first recording layer 11, the pulse in the relationship between the positional deviation of the pulse in the other recording layers 12 and 13 and the pulse phase. A characteristic relational expression that represents the phase correction parameter, that is, the pulse phase correction parameter in the relationship between the pulse misalignment (Pluse (Topr, Tlast)) and the pulse phase as shown in the graph of FIG. 9 is predicted. (SB4).

  Next, optimum values of the laser power and the pulse width are derived using the above characteristic relational expression (SB5). Further, it is determined whether or not the optimum value can be applied to record information with a predetermined quality after adjustment at a desired recording speed (SB6). In this adjustment, the laser power adjustment parameter (evaluation index) and the pulse width adjustment parameter (evaluation index) with respect to the stepwise change in the recording conditions of the laser power and the pulse width are used to record information with a predetermined quality. At least one of the laser power and the pulse width of the laser light applied to the recording layer is adjusted so as to have a suitable predetermined value. OPC may be performed for this adjustment.

  If the result of the determination at SB6 is applicable, the process proceeds to SB9, which will be described later, and if it is not applicable, the recording speed is set to a predetermined recording speed or recording is set to stop ( SB7) It is determined whether or not to stop recording (SB8). When the recording is stopped, the process proceeds to SB11 described later. When the recording speed is set to be lowered, the process proceeds to SB6. If the recording speed cannot be applied even if the recording speed is reduced, the process may be repeated from the process SB1 instead of the recording stop.

  As a result of the determination of SB6, when the optimum value is applicable to a desired recording speed, the determination result, processing contents, parameters (evaluation index), and adjustment result information are recorded on the optical disk 10 and stored in the memory 127. Recording is performed in association with the media ID of the optical disc 10 (SB9).

  Thereafter, information is recorded on the optical disc 10 using the optimum value obtained (SB10). Next, the determination result and the processing content are displayed on the display unit 131 (SB12), and the information recording on the second or third recording layer 12, 13 is finished.

  According to the above embodiment, the test information is recorded and reproduced with the change of the type of the recording condition on the first recording layer 11, and information to the first recording layer 11 is obtained based on the test result obtained thereby. Irradiation conditions suitable for recording are derived, and the second and third recording layers 12 and 13 are tested with a smaller number of changes than the number of changes in the type of test recording conditions performed in the first recording layer test. Information is recorded and reproduced. Based on the test result of the first recording layer 11 and the test result of the second or third recording layer 12 or 13, information of the information to the second or third recording layer 12 or 13 is recorded. Since irradiation conditions suitable for recording are derived and information recording is performed on the second or third recording layers 12 and 13 using the irradiation conditions, the irradiation conditions for the second and third recording layers 12 and 13 are derived. Can reduce the test time to It can be recorded in a short time information by shortening the test time before recording information.

  Further, in the test recording of the second or third recording layers 12 and 13, only the test for changing the laser power is performed, and the test for changing the pulse width that uses a lot of time and the test area is not performed. Can be further shortened.

  As described above, in the normal test recording, the characteristic relationship between the laser power and β is obtained in the laser power adjustment test, the optimum laser power is derived from this characteristic relationship, and the pulse-to-phase deviation is determined in the pulse width adjustment test. In this embodiment, only the laser power adjustment test is performed for the recording layers other than the first recording layer 11, and the test recording condition is determined. By reducing the number and reducing the test time, a strategy having an optimum laser power and pulse width can be derived.

  Further, according to the optical recording apparatus 100 of the present embodiment, the optical recording method can be easily realized. Furthermore, according to the micro CPU element 125 of the present embodiment, the optical recording method can be easily realized. Further, according to the computer program of the present embodiment, the optical recording device 100 and the optical recording method can be easily realized using an arbitrary CPU.

  In the above embodiment, an example using a well-known multilayer DVD as the optical disk 10 has been described. However, the same effect can be obtained by the same processing when an HD-DVD is used as the optical disk 10. Further, when a well-known Blu-ray disc is used as the optical disc 10, the standard is different from that of DVD. Therefore, in the first recording layer, laser power (Write PW) and asymmetry as shown in the graph of FIG. , A characteristic relational expression expressing a phase correction parameter in a relation between laser power (Write PW) and amplitude as shown in the graph of FIG. 11, and a pulse as shown in the graph of FIG. A characteristic relational expression representing a phase correction parameter in the relation between the positional deviation (Pluse (Topr, Tlast)) and the amplitude of the leading edge and the trailing edge of the recording layer is derived. The characteristic relational expression showing the phase correction parameter in the relation between the laser power (Write PW) and the amplitude as shown in the graph is obtained, and the correlation between these characteristic relational expressions is obtained. A characteristic relational expression representing a phase correction parameter in the relation between the positional deviation (Pluse (Topr, Tlast)) of the pulse and the amplitude as shown in the graph of FIG. Thus, the optimum value in the other recording layer can be obtained. The pulse width adjustment parameter (evaluation index) means phase shift, length shift, and amplitude shift.

  Next, a second embodiment of the present invention will be described.

  The apparatus configuration in this embodiment is the same as that of the first embodiment described above. The difference from the first embodiment is that the recording process in the recording layers 12 and 13 other than the first recording layer 11 is different in the second embodiment. That is, the CPU 125 storing the computer program is used. In the following description, the same components as those in the first embodiment will be described using the same reference numerals.

  That is, in the optical recording apparatus 100 according to the present embodiment, the information recording process on the first recording layer 11 of the optical disc 10 is the same as the process of the first embodiment shown in the flowchart of FIG. In addition, as shown in the flowchart of FIG. 15, the information recording process to the recording layers 12 and 13 other than the first recording layer 11 is performed under one kind of test recording conditions of only the test recording for pulse width adjustment by the same OPC. The test is performed a number of times smaller than the number of times in the first recording layer 11, the recorded information is reproduced (SC1), and a parameter (evaluation index) in the laser light irradiation condition is detected (SC2). The pulse width adjustment test recording is performed by changing the pulse width step by step.

  Next, a characteristic relational expression is derived from the obtained parameters (SC3). As this characteristic relational expression, for example, as shown in the graph of FIG. 9, a characteristic relation representing a pulse phase correction parameter in the relation between the pulse misalignment (Pluse (Topr, Tlast)) and the pulse phase. Derive an expression.

  Thereafter, the pulse in the relationship between the laser power in the other recording layers 12 and 13 and the positional deviation of the pulse is obtained using the parameters obtained from the characteristic relational expression obtained above and the characteristic relational expression obtained in the first recording layer 11. A characteristic relational expression representing the phase correction parameter, that is, the phase correction parameter in the relationship between the laser power (Wrigte PW) and the pulse phase as shown in the graph of FIG. 8 is predicted (SC4).

  Next, the optimum values of the laser power and the pulse width are derived using the above characteristic relational expression (SC5). Further, it is determined whether or not the optimum value can be applied to record information with a predetermined quality after adjustment at a desired recording speed (SC6). In this adjustment, the laser power adjustment parameter (evaluation index) and the pulse width adjustment parameter (evaluation index) with respect to the stepwise change in the recording conditions of the laser power and the pulse width are used to record information with a predetermined quality. At least one of the laser power and the pulse width of the laser light applied to the recording layer is adjusted so as to have a suitable predetermined value. OPC may be performed for this adjustment.

  If the result of the determination in SC6 is applicable, the process proceeds to SC9, which will be described later, and if it is not applicable, the recording speed is set to a predetermined recording speed or recording is set to stop ( SC7) It is determined whether or not the recording is to be stopped (SC8). When the recording is stopped, the process proceeds to SC11 described later, and when the recording speed is set to be lowered, the process proceeds to SC6. If the recording speed cannot be applied even if the recording speed is lowered, the processing may be repeated from the process of SC1 again instead of stopping the recording.

  As a result of the determination of SC6, when the optimum value is applicable to the desired recording speed, the determination result, the processing content, the parameter (evaluation index), and the adjustment result information are recorded on the optical disk 10 and stored in the memory 127. Recording is performed in association with the media ID of the optical disc 10 (SC9). As described above, the information can be utilized when recording on the same type of optical disk 10 next time by keeping it as a record. The condition data used for test recording may be recorded in accordance with the above information. Further, the above information may be recorded only on either the optical disc 10 or the memory 127. In addition, information on only one of the judgment result or the processing content accompanying this judgment may be recorded, or information on only one of the parameter (evaluation index) or the adjustment result using the parameter may be recorded. It may be recorded.

  Thereafter, information is recorded on the optical disk 10 using the optimum value obtained (SC10). Next, the determination result and the processing content are displayed on the display unit 131 (SC12), and the information recording on the second or third recording layer 12, 13 is finished. Note that only one of the determination result or the processing content accompanying this determination may be displayed on the display unit 131.

  According to the above embodiment, the test information is recorded and reproduced with the change of the type of the recording condition on the first recording layer 11, and information to the first recording layer 11 is obtained based on the test result obtained thereby. Irradiation conditions suitable for recording are derived, and the second and third recording layers 12 and 13 are tested with a smaller number of changes than the number of changes in the type of test recording conditions performed in the first recording layer test. Information is recorded and reproduced. Based on the test result of the first recording layer 11 and the test result of the second or third recording layer 12 or 13, information of the information to the second or third recording layer 12 or 13 is recorded. Since irradiation conditions suitable for recording are derived and information recording is performed on the second or third recording layers 12 and 13 using the irradiation conditions, the irradiation conditions for the second and third recording layers 12 and 13 are derived. Can reduce the test time to It can be recorded in a short time information by shortening the test time before recording information.

  Further, in the test recording of the second or third recording layers 12 and 13, only the test for changing the pulse width is performed, so that the test time can be further shortened.

  As described above, in the normal test recording, the characteristic relationship between the laser power and β is obtained in the laser power adjustment test, the optimum laser power is derived from this characteristic relationship, and the pulse-to-phase deviation is determined in the pulse width adjustment test. In this embodiment, only the pulse width adjustment test is performed on the recording layers other than the first recording layer 11, and the test recording condition is determined. By reducing the number and reducing the test time, a strategy having an optimum laser power and pulse width can be derived.

  In the above embodiment, an example using a known multi-layer DVD as the optical disk 10 has been described. However, as with the first embodiment, an HD-DVD or a known Blu-ray disk may be used as the optical disk 10. The above effect can be obtained by the same processing.

  Next, a third embodiment of the present invention will be described.

  The apparatus configuration in this embodiment is the same as that of the first embodiment described above. The difference from the first embodiment is that the recording processing in each recording layer 11, 12, 13 of the optical disc 10 is different in the third embodiment. That is, the CPU 125 storing the program is used. In the following description, the same components as those in the first embodiment will be described using the same reference numerals.

  16 and 17 are flowcharts for explaining the recording process to the recording layer in the third embodiment. A computer program for executing this processing is stored in advance in the memory circuit 126 of the CPU 125, and the CPU 125 performs these processing. In this embodiment, the test process when recording information on the first recording layer 11 of the optical disc 10 is substantially the same as the conventional one, but the test process when recording information on recording layers other than the first recording layer 11 is performed. Unlike the test process in the first recording layer 11, the time can be shortened.

  That is, when information is recorded on the first recording layer 11, the process shown in the flowchart of FIG. 16 is executed. In this process, a test under two types of test recording conditions, that is, a test recording for laser power adjustment of a predetermined number of conditions and a test recording for pulse width adjustment of a predetermined number of conditions is performed by OPC similar to the conventional method, and the recorded information is reproduced. (SD1), a parameter (evaluation index) under laser light irradiation conditions is detected (SD2).

  For example, as conditions used for laser power adjustment test recording, laser power is set to 10 conditions of 1 mW, 2 mW,..., 10 mW. Furthermore, test conditions for pulse width adjustment test recording are similarly performed under ten different conditions.

  Examples of parameters include β (Asymmetry), laser beam irradiation power, pulse phase, and the like in the case of DVD. Further, the laser power adjustment test recording is performed by changing the laser power (Wrigte PW) stepwise as shown in FIG. 4, and the pulse width adjustment test recording is similarly performed by changing the pulse width stepwise. When detecting the above parameters, if the strategy table data stored in the memory 127 can be used, it is used, and the strategy table data stored in the memory 127 cannot be used. In the case of the type of optical disk 10, a well-known auto strategy detection process is performed.

  Next, a characteristic relational expression is derived from the obtained parameters (SD3). As this characteristic relational expression, for example, a characteristic relational expression representing the relationship between laser power (Wrigte PW) and β as shown in the graph of FIG. 5, and laser power (Wrigte PW) as shown in the graph of FIG. Characteristic relational expression showing phase correction parameter in relation to pulse phase, pulse phase in relation to pulse phase shift (Pluse (Topr, Tlast)) and pulse phase as shown in graph of FIG. A characteristic relational expression representing the correction parameter is derived. Here, two types of parameters (evaluation index) from the test information recorded by changing the laser power stepwise, that is, the characteristics representing the relationship between the laser power (Wrigte PW) and β as shown in the graph of FIG. A characteristic relational expression representing a phase correction parameter in the relation between the relational expression and the laser power (Wrigte PW) and the pulse phase as shown in the graph of FIG. 6 is derived.

  Thereafter, the optimum values of the laser power and the pulse width are derived using the parameters obtained from the obtained characteristic relational expression (SD4). Further, it is determined whether or not the optimum value can be applied to record information with a predetermined quality after adjustment at a desired recording speed (SD5). In this adjustment, the laser power adjustment parameter (evaluation index) and the pulse width adjustment parameter (evaluation index) with respect to the stepwise change in the recording conditions of the laser power and the pulse width are used to record information with a predetermined quality. At least one of the laser power and the pulse width of the laser light applied to the recording layer is adjusted so as to have a suitable predetermined value. OPC may be performed for this adjustment.

  If the result of the determination in SD5 is applicable, the process proceeds to SD8, which will be described later, and if it is not applicable, the recording speed is set to a predetermined recording speed or recording is set to stop ( SD6), it is determined whether or not to stop recording (SD7). When recording is stopped, the process proceeds to SD10 described later, and when the recording speed is set to be lowered, the process proceeds to SD5.

  As a result of the determination of SD5, when the optimum value is applicable to the desired recording speed, the determination result, processing contents, parameters (evaluation index), and adjustment result information are recorded on the optical disk 10 and stored in the memory 127. Recording is performed in correspondence with the media ID of the optical disc 10 (SD8). As described above, the information can be utilized when recording on the same type of optical disk 10 next time by keeping it as a record. The condition data used for test recording may be recorded in accordance with the above information. Further, the above information may be recorded only on either the optical disc 10 or the memory 127. In addition, information on only one of the judgment result or the processing content accompanying this judgment may be recorded, or information on only one of the parameter (evaluation index) or the adjustment result using the parameter may be recorded. It may be recorded.

  Thereafter, information is recorded on the optical disk 10 using the obtained optimum value (SD9). Next, the determination result and the processing content are displayed on the display unit 131 (SD10), and the information recording on the first recording layer 11 is terminated. Note that only one of the determination result or the processing content accompanying this determination may be displayed on the display unit 131.

  When information is recorded on the recording layers 12 and 13 other than the first recording layer 11, the process shown in the flowchart of FIG. 17 is performed.

  That is, when information is recorded on the recording layers 12 and 13 other than the first recording layer 11, the processing shown in FIG. 17 is executed. In this process, a test with only one type of test recording condition of only laser power adjustment test recording is performed by the same OPC as in the prior art, and the number of conditions less than the number of conditions in the first recording layer 11 is reproduced, and the recorded information is reproduced. (SE1), a parameter (evaluation index) under laser light irradiation conditions is detected (SE2). Laser power adjustment test recording is performed by changing the laser power (Wrigte PW) step by step as shown in FIG. Here, test recording is performed using five conditions among the ten conditions (1 mW,..., 10 mW) used in the test recording of the first recording layer 11.

  Next, a characteristic relational expression is derived from the obtained parameters (SE3). As this characteristic relational expression, for example, a characteristic relational expression representing a phase correction parameter in the relation between the laser power (Wrigte PW) and the pulse phase as shown in the graph of FIG. 8 is derived.

  Thereafter, using the parameters obtained from the characteristic relational expression obtained above and the characteristic relational expression obtained in the first recording layer 11, the pulse in the relationship between the positional deviation of the pulse in the other recording layers 12 and 13 and the pulse phase. A characteristic relational expression that represents the phase correction parameter, that is, the pulse phase correction parameter in the relationship between the pulse misalignment (Pluse (Topr, Tlast)) and the pulse phase as shown in the graph of FIG. 9 is predicted. (SE4).

  Next, optimum values of the laser power and the pulse width are derived using the above characteristic relational expression (SE5). Further, it is determined whether or not the optimum value can be applied to record information with a predetermined quality after adjustment at a desired recording speed (SE6). In this adjustment, the laser power adjustment parameter (evaluation index) and the pulse width adjustment parameter (evaluation index) with respect to the stepwise change in the recording conditions of the laser power and the pulse width are used to record information with a predetermined quality. At least one of the laser power and the pulse width of the laser light applied to the recording layer is adjusted so as to have a suitable predetermined value. OPC may be performed for this adjustment.

  If the result of the determination in SE6 is applicable, the process proceeds to the process of SE9 described later, and if it is not applicable, the recording speed is set to a predetermined recording speed or the recording is set to stop ( SE7), it is determined whether or not to stop recording (SE8). When the recording is stopped, the process proceeds to SE11 described later, and when the recording speed is set to be lowered, the process proceeds to SE6. If the recording speed cannot be applied even if the recording speed is lowered, the processing may be repeated from the processing of SE1 instead of the recording stop.

  If the optimum value is applicable to the desired recording speed as a result of the determination of SE6, the determination result, the processing content, the parameter (evaluation index), and the adjustment result information are recorded on the optical disc 10 and stored in the memory 127. Recording is performed in association with the media ID of the optical disc 10 (SE9).

  Thereafter, information is recorded on the optical disk 10 using the obtained optimum value (SE10). Next, the determination result and the processing content are displayed on the display unit 131 (SE12), and the information recording on the second or third recording layer 12, 13 is finished.

  According to the above embodiment, the test information is recorded and reproduced on the first recording layer 11 under the test recording condition with the condition change 10 times, and the first recording layer 11 is recorded based on the test result. Irradiation conditions suitable for information recording are derived, and test information is recorded and reproduced on the other recording layers 12 and 13 under five conditions less than the number of test recording conditions used in the test recording of the first recording layer. On the basis of the test result of the first recording layer 11 and the test result of the second or third recording layer 12, 13, irradiation conditions suitable for recording information on the second or third recording layer 12, 13 are determined. Since the information is recorded on the second or third recording layer 12 or 13 using the irradiation condition, the test time for deriving the irradiation condition of the second or third recording layer 12 or 13 is shortened. Can be tested before information recording It can be recorded in a short time information by shortening the time.

  Further, in the test recording of the second or third recording layers 12 and 13, only the test for changing the laser power is performed, and the test for changing the pulse width that uses a lot of time and the test area is not performed. Can be further shortened.

  As described above, in the normal test recording, the characteristic relationship between the laser power and β is obtained in the laser power adjustment test, the optimum laser power is derived from this characteristic relationship, and the pulse-to-phase deviation is determined in the pulse width adjustment test. The characteristic relationship is obtained, and the optimum pulse width, that is, the strategy is obtained from this characteristic relationship. In this embodiment, for the recording layers other than the first recording layer 11, only the laser power adjustment test is performed by reducing the number of conditions. The strategy having the optimum laser power and pulse width can be derived.

  In the above embodiment, an example using a well-known multi-layer DVD as the optical disk 10 has been described. However, when the HD-DVD or a well-known Blu-ray disk is used as the optical disk 10, the above-described effects can be obtained by the same processing. Can be obtained.

  Next, a fourth embodiment of the present invention will be described.

  The apparatus configuration in this embodiment is the same as that of the first embodiment described above. The difference from the first embodiment is that the recording process in the recording layers 12 and 13 other than the first recording layer 11 is the first in the fourth embodiment. That is, a CPU 125 storing a computer program partially different from that of the third embodiment is used. In the following description, the same components as those in the first embodiment will be described using the same reference numerals.

  That is, in the optical recording apparatus 100 in the present embodiment, the information recording process on the first recording layer 11 of the optical disc 10 is the same as the process in the third embodiment shown in the flowchart of FIG. In addition, as shown in the flowchart of FIG. 18, the information recording process to the recording layers 12 and 13 other than the first recording layer 11 is based on one type of test recording condition of only pulse width adjustment test recording by OPC as in the prior art. The test is performed for a condition number smaller than the condition number in the first recording layer 11, the recorded information is reproduced (SF1), and a parameter (evaluation index) under the laser light irradiation condition is detected (SF2). The pulse width adjustment test recording is performed by changing the pulse width step by step. Here, test recording is performed using five of the ten pulse width conditions used in the test recording of the first recording layer 11.

  Next, a characteristic relational expression is derived from the obtained parameters (SF3). As this characteristic relational expression, for example, as shown in the graph of FIG. 9, a characteristic relation representing a pulse phase correction parameter in the relation between the pulse misalignment (Pluse (Topr, Tlast)) and the pulse phase. Derive an expression.

  Thereafter, the pulse phase correction in the relationship between the laser power and the pulse phase in the other recording layers 12 and 13 is performed using the parameters obtained from the obtained characteristic relational expression and the characteristic relational expression obtained in the first recording layer 11. A characteristic relational expression representing a phase correction parameter in the relationship between the parameters, that is, the laser power (Wrigte PW) and the pulse phase as shown in the graph of FIG. 8 is predicted (SF4).

  Next, optimum values of the laser power and the pulse width are derived using the above characteristic relational expression (SF5). Further, it is determined whether or not the optimum value can be applied to record information with a predetermined quality after adjustment at a desired recording speed (SF6). In this adjustment, the laser power adjustment parameter (evaluation index) and the pulse width adjustment parameter (evaluation index) with respect to the stepwise change in the recording conditions of the laser power and the pulse width are used to record information with a predetermined quality. At least one of the laser power and the pulse width of the laser light applied to the recording layer is adjusted so as to have a suitable predetermined value. OPC may be performed for this adjustment.

  If the result of the determination of SF6 is applicable, the process proceeds to the process of SF9, which will be described later, and if it is not applicable, the recording speed is set to a predetermined recording speed or recording is set to stop ( SF7) It is determined whether or not the recording is to be stopped (SF8). When the recording is stopped, the process proceeds to SF11 described later. When the recording speed is set to be lowered, the process proceeds to SF6. If the recording speed cannot be applied even if the recording speed is lowered, the process may be repeated from the SF1 process instead of the recording stop.

  If the optimum value is applicable to the desired recording speed as a result of the determination in SF6, the determination result, the processing content, the parameter (evaluation index), and the adjustment result information are recorded on the optical disk 10 and stored in the memory 127. Recording is performed in correspondence with the media ID of the optical disc 10 (SF9). As described above, the information can be utilized when recording on the same type of optical disk 10 next time by keeping it as a record. The condition data used for test recording may be recorded in accordance with the above information. Further, the above information may be recorded only on either the optical disc 10 or the memory 127. In addition, information on only one of the judgment result or the processing content accompanying this judgment may be recorded, or information on only one of the parameter (evaluation index) or the adjustment result using the parameter may be recorded. It may be recorded.

  Thereafter, information is recorded on the optical disc 10 using the obtained optimum value (SF10). Next, the determination result and the processing content are displayed on the display unit 131 (SF12), and the information recording on the second or third recording layer 12, 13 is finished. Only one of the determination result or the processing content associated with this determination may be displayed on the display unit 131.

  According to the above embodiment, the test information is recorded and reproduced on the first recording layer 11 under the test recording condition with the condition change 10 times, and the first recording layer 11 is recorded based on the test result. Irradiation conditions suitable for information recording are derived, and test information is recorded and reproduced on the other recording layers 12 and 13 under five conditions less than the number of test recording conditions used in the test recording of the first recording layer. On the basis of the test result of the first recording layer 11 and the test result of the second or third recording layer 12, 13, irradiation conditions suitable for recording information on the second or third recording layer 12, 13 are determined. Since the information is recorded on the second or third recording layer 12 or 13 using the irradiation condition, the test time for deriving the irradiation condition of the second or third recording layer 12 or 13 is shortened. Can be tested before information recording It can be recorded in a short time information by shortening the time.

  Further, in the test recording of the second or third recording layers 12 and 13, only the test for changing the pulse width is performed, so that the test time can be further shortened.

  As described above, in the normal test recording, the characteristic relationship between the laser power and β is obtained in the laser power adjustment test, the optimum laser power is derived from this characteristic relationship, and the pulse-to-phase deviation is determined in the pulse width adjustment test. In this embodiment, only the pulse width adjustment test is performed on the recording layers other than the first recording layer 11, and the test recording condition is determined. By reducing the number and reducing the test time, a strategy having an optimum laser power and pulse width can be derived.

  In the above embodiment, an example using a known multi-layer DVD as the optical disk 10 has been described. However, when an HD-DVD or a well-known Blu-ray disk is used as the optical disk 10 as in the first embodiment. The same effect can be obtained by the same processing.

  Next, a fifth embodiment of the present invention will be described.

  The apparatus configuration in this embodiment is the same as that of the first embodiment described above, and the difference from the first embodiment is that the recording process in each recording layer 11, 12, 13 of the optical disc 10 is different in the fifth embodiment. That is, the CPU 125 storing the program is used. In the following description, the same components as those in the first embodiment will be described using the same reference numerals.

  FIG. 19 and FIG. 20 are flowcharts for explaining the recording process to the recording layer in the fifth embodiment. A computer program for executing this processing is stored in advance in the memory circuit 126 of the CPU 125, and the CPU 125 performs these processing. In this embodiment, the test process when recording information on the first recording layer 11 of the optical disc 10 is substantially the same as the conventional one, but the test process when recording information on recording layers other than the first recording layer 11 is performed. Unlike the test process in the first recording layer 11, the time can be shortened.

That is, when information is recorded on the first recording layer 11, the process shown in the flowchart of FIG. 19 is executed. In this process, the test is performed under two kinds of test recording conditions of laser power adjustment test recording and pulse width adjustment test recording by the same OPC as in the prior art, and the recorded information is reproduced (SG1), and the laser light irradiation condition The parameter (evaluation index) is detected (SG2). At this time, recording and reproduction are performed by switching a predetermined number of times. Examples of parameters include DVD (Asymmetry), laser beam irradiation power, pulse phase, and the like in the case of DVD. Further, the laser power adjustment test recording is performed by changing the laser power (Wrigte PW) stepwise as shown in FIG. 4, and the pulse width adjustment test recording is similarly performed by changing the pulse width stepwise. When detecting the above parameters, if the strategy table data stored in the memory 127 can be used, it is used, and the strategy table data stored in the memory 127 cannot be used. In the case of the type of optical disk 10, a well-known auto strategy detection process is performed.

  Next, a characteristic relational expression is derived from the obtained parameters (SG3). As this characteristic relational expression, for example, a characteristic relational expression representing the relationship between laser power (Wrigte PW) and β as shown in the graph of FIG. 5, and laser power (Wrigte PW) as shown in the graph of FIG. Characteristic relational expression showing phase correction parameter in relation to pulse phase, pulse phase in relation to pulse phase shift (Pluse (Topr, Tlast)) and pulse phase as shown in graph of FIG. A characteristic relational expression representing the correction parameter is derived. Here, two types of parameters (evaluation index) from the test information recorded by changing the laser power stepwise, that is, the characteristics representing the relationship between the laser power (Wrigte PW) and β as shown in the graph of FIG. A characteristic relational expression representing a phase correction parameter in the relation between the relational expression and the laser power (Wrigte PW) and the pulse phase as shown in the graph of FIG. 6 is derived.

  Thereafter, the optimum values of the laser power and the pulse width are derived using the parameters obtained from the obtained characteristic relational expression (SG4). Further, it is determined whether or not the optimum value can be applied to record information with a predetermined quality after adjustment at a desired recording speed (SG5). In this adjustment, the laser power adjustment parameter (evaluation index) and the pulse width adjustment parameter (evaluation index) with respect to the stepwise change in the recording conditions of the laser power and the pulse width are used to record information with a predetermined quality. At least one of the laser power and the pulse width of the laser light applied to the recording layer is adjusted so as to have a suitable predetermined value. OPC may be performed for this adjustment.

  If the result of the determination of SG5 is applicable, the process proceeds to the process of SG8 described later, and if it is not applicable, the recording speed is set to a predetermined recording speed or the recording is set to stop ( SG6) It is determined whether or not to stop recording (SG7). When the recording is stopped, the process proceeds to SG10 described later, and when the recording speed is set to be lowered, the process proceeds to SG5.

  When the optimum value is applicable to the desired recording speed as a result of the determination of SG5, the determination result, the processing content, the parameter (evaluation index), and the adjustment result information are recorded on the optical disk 10 and stored in the memory 127. Recording is performed in association with the media ID of the optical disc 10 (SG8). As described above, the information can be utilized when recording on the same type of optical disk 10 next time by keeping it as a record. The condition data used for test recording may be recorded in accordance with the above information. Further, the above information may be recorded only on either the optical disc 10 or the memory 127. In addition, information on only one of the judgment result or the processing content accompanying this judgment may be recorded, or information on only one of the parameter (evaluation index) or the adjustment result using the parameter may be recorded. It may be recorded.

  Thereafter, information is recorded on the optical disc 10 using the obtained optimum value (SG9). Next, the determination result and the processing content are displayed on the display unit 131 (SG10), and the information recording on the first recording layer 11 is terminated. Note that only one of the determination result or the processing content accompanying this determination may be displayed on the display unit 131.

  Further, when information is recorded on the recording layers 12 and 13 other than the first recording layer 11, the processing shown in the flowchart of FIG. 20 is performed. In this processing, a test under one kind of test recording condition of only laser power adjustment test recording is performed by the same number of OPCs as in the past, and the recorded information is recorded by a number of switching smaller than the number of recording and reproduction switching in the first recording layer 11. Is reproduced (SH1), and a parameter (evaluation index) in the laser light irradiation condition is detected (SH2). Laser power adjustment test recording is performed by changing the laser power (Wrigte PW) step by step as shown in FIG.

  Next, a characteristic relational expression is derived from the obtained parameters (SH3). As this characteristic relational expression, for example, a characteristic relational expression representing a phase correction parameter in the relation between the laser power (Wrigte PW) and the pulse phase as shown in the graph of FIG. 8 is derived.

  Thereafter, using the parameters obtained from the characteristic relational expression obtained above and the characteristic relational expression obtained in the first recording layer 11, the pulse in the relationship between the positional deviation of the pulse in the other recording layers 12 and 13 and the pulse phase. A characteristic relational expression that represents the phase correction parameter, that is, the pulse phase correction parameter in the relationship between the pulse misalignment (Pluse (Topr, Tlast)) and the pulse phase as shown in the graph of FIG. 9 is predicted. (SH4).

  Next, optimum values of the laser power and the pulse width are derived using the above characteristic relational expression (SH5). Further, it is determined whether or not the optimum value can be applied to record information with a predetermined quality after adjustment at a desired recording speed (SH6). In this adjustment, the laser power adjustment parameter (evaluation index) and the pulse width adjustment parameter (evaluation index) with respect to the stepwise change in the recording conditions of the laser power and the pulse width are used to record information with a predetermined quality. At least one of the laser power and the pulse width of the laser light applied to the recording layer is adjusted so as to have a suitable predetermined value. OPC may be performed for this adjustment.

  If the result of the determination of SH6 is applicable, the process proceeds to the process of SH9, which will be described later, and if it is not applicable, the recording speed is set to a predetermined recording speed or recording is set to stop ( In step SH7, it is determined whether or not the recording is to be stopped (SH8). When the recording is stopped, the process proceeds to SH11 described later. When the recording speed is set to be lowered, the process proceeds to the SH6. If the recording speed cannot be applied even if the recording speed is lowered, the processing may be repeated from the processing of SH1 again instead of stopping the recording.

  As a result of the determination of SH6, when the optimum value is applicable to a desired recording speed, the determination result, processing contents, parameters (evaluation index), and adjustment result information are recorded on the optical disk 10 and stored in the memory 127. Recording is performed in correspondence with the media ID of the optical disc 10 (SH9).

  Thereafter, information is recorded on the optical disk 10 using the obtained optimum value (SH10). Next, the determination result and the processing content are displayed on the display unit 131 (SH12), and the information recording on the second or third recording layer 12, 13 is finished.

  According to the above embodiment, when recording and reproducing test information on the first recording layer 11 under a plurality of types of test recording conditions, the recording and reproduction are executed by switching a predetermined number of times. Based on this, an irradiation condition suitable for recording information on the first recording layer 11 is derived, and when recording and reproducing test information on the other recording layers 12 and 13, this recording and reproduction is performed first. The number of times of switching is smaller than the number of times of switching in one recording layer 11, and the second or third recording is performed based on the test result of the first recording layer 11 and the test results of the second or third recording layers 12 and 13. Irradiation conditions suitable for recording information on the layers are derived, and information recording is performed on the second or third recording layers 12 and 13 using the irradiation conditions, so that the second and third recording layers 12 and 13 are recorded. Test for deriving irradiation conditions It is possible to shorten the time, it can be recorded in a short time information by shortening the test time before recording information.

  Further, in the test recording of the second or third recording layers 12 and 13, only the test for changing the laser power is performed, and the test for changing the pulse width that uses a lot of time and the test area is not performed. Can be further shortened.

  As described above, in the normal test recording, the characteristic relationship between the laser power and β is obtained in the laser power adjustment test, the optimum laser power is derived from this characteristic relationship, and the pulse-to-phase deviation is determined in the pulse width adjustment test. The characteristic relationship is obtained, and the optimum pulse width, that is, the strategy is obtained from this characteristic relationship. In this embodiment, for the recording layers other than the first recording layer 11, the number of switching between recording and reproduction is reduced to adjust the laser power. Only a test is performed so that a strategy having an optimum laser power and pulse width can be derived.

  In the above embodiment, an example using a well-known multi-layer DVD as the optical disk 10 has been described. However, when the HD-DVD or a well-known Blu-ray disk is used as the optical disk 10, the above-described effects can be obtained by the same processing. Can be obtained.

  Next, a sixth embodiment of the present invention will be described.

  The apparatus configuration in the present embodiment is the same as that of the first embodiment described above. The difference from the first embodiment is that the recording process in the recording layers 12 and 13 other than the first recording layer 11 is the first in the sixth embodiment. That is, a CPU 125 storing a computer program that is partially different from that of the fifth embodiment is used. In the following description, the same components as those in the first embodiment will be described using the same reference numerals.

  That is, in the optical recording apparatus 100 in the present embodiment, the information recording process on the first recording layer 11 of the optical disc 10 is the same as the process in the fifth embodiment shown in the flowchart of FIG. In addition, as shown in the flowchart of FIG. 21, the information recording process to the recording layers 12 and 13 other than the first recording layer 11 is based on one type of test recording condition of only pulse width adjustment test recording by OPC as in the prior art. The test is performed for the number of switching smaller than the number of recording and reproduction in the first recording layer 11, the recorded information is reproduced (SI1), and the parameter (evaluation index) in the laser light irradiation condition is detected (SI2). The pulse width adjustment test recording is performed by changing the pulse width step by step.

  Next, a characteristic relational expression is derived from the obtained parameters (SI3). As this characteristic relational expression, for example, as shown in the graph of FIG. 9, a characteristic relation representing a pulse phase correction parameter in the relation between the pulse misalignment (Pluse (Topr, Tlast)) and the pulse phase. Derive an expression.

  Thereafter, the relationship between the positional deviation of the pulses in the other recording layers 12 and 13 and the pulse phase correction parameter is obtained using the parameter obtained from the characteristic relational expression obtained above and the characteristic relational expression obtained in the first recording layer 11. That is, a characteristic relational expression representing the phase correction parameter in the relation between the laser power (Wrigte PW) and the pulse phase as shown in the graph of FIG. 8 is predicted (SI4).

  Next, optimum values of the laser power and the pulse width are derived using the above characteristic relational expression (SI5). Further, it is determined whether or not the optimum value can be applied to record information with a predetermined quality after adjustment at a desired recording speed (SI6). In this adjustment, the laser power adjustment parameter (evaluation index) and the pulse width adjustment parameter (evaluation index) with respect to the stepwise change in the recording conditions of the laser power and the pulse width are used to record information with a predetermined quality. At least one of the laser power and the pulse width of the laser light applied to the recording layer is adjusted so as to have a suitable predetermined value. OPC may be performed for this adjustment.

  If the result of the determination of SI6 is applicable, the process proceeds to SI9, which will be described later, and if it is not applicable, the recording speed is set to a predetermined recording speed or recording is set to stop ( SI7) It is determined whether or not to stop recording (SI8). When the recording is stopped, the process proceeds to SI11 described later, and when the recording speed is set to be lowered, the process proceeds to SI6. If the recording speed cannot be applied even if the recording speed is lowered, the processing of SI1 may be repeated again instead of stopping the recording.

  If the optimum value is applicable to the desired recording speed as a result of the determination of SI6, the determination result, processing contents, parameters (evaluation index), and adjustment result information are recorded on the optical disk 10 and stored in the memory 127. Recording is performed in association with the media ID of the optical disc 10 (SI9). As described above, the information can be utilized when recording on the same type of optical disk 10 next time by keeping it as a record. The condition data used for test recording may be recorded in accordance with the above information. Further, the above information may be recorded only on either the optical disc 10 or the memory 127. In addition, information on only one of the judgment result or the processing content accompanying this judgment may be recorded, or information on only one of the parameter (evaluation index) or the adjustment result using the parameter may be recorded. It may be recorded.

  Thereafter, information is recorded on the optical disc 10 using the obtained optimum value (SI10). Next, the determination result and the processing content are displayed on the display unit 131 (SI12), and the information recording on the second or third recording layer 12, 13 is finished. Note that only one of the determination result or the processing content accompanying this determination may be displayed on the display unit 131.

  According to the above embodiment, when recording and reproducing test information on the first recording layer 11 under a plurality of types of test recording conditions, the recording and reproduction are executed by switching a predetermined number of times. Based on this, an irradiation condition suitable for recording information on the first recording layer 11 is derived, and when recording and reproducing test information on the other recording layers 12 and 13, this recording and reproduction is performed first. The number of times of switching is smaller than the number of times of switching in one recording layer 11, and the second or third recording is performed based on the test result of the first recording layer 11 and the test results of the second or third recording layers 12 and 13. Irradiation conditions suitable for recording information on the layers are derived, and information recording is performed on the second or third recording layers 12 and 13 using the irradiation conditions, so that the second and third recording layers 12 and 13 are recorded. Test for deriving irradiation conditions It is possible to shorten the time, it can be recorded in a short time information by shortening the test time before recording information.

  Further, in the test recording of the second or third recording layers 12 and 13, only the test for changing the pulse width is performed, so that the test time can be further shortened.

  As described above, in the normal test recording, the characteristic relationship between the laser power and β is obtained in the laser power adjustment test, the optimum laser power is derived from this characteristic relationship, and the pulse-to-phase deviation is determined in the pulse width adjustment test. In this embodiment, only the pulse width adjustment test is performed on the recording layers other than the first recording layer 11, and the test recording condition is determined. By reducing the number and reducing the test time, a strategy having an optimum laser power and pulse width can be derived.

  In the above embodiment, an example using a known multi-layer DVD as the optical disk 10 has been described. However, when an HD-DVD or a well-known Blu-ray disk is used as the optical disk 10 as in the first embodiment. The same effect can be obtained by the same processing.

  Next, a seventh embodiment of the present invention will be described.

  The apparatus configuration in this embodiment is the same as that of the first embodiment described above. The difference from the first embodiment is that the recording process in each recording layer 11, 12, 13 of the optical disc 10 is different in the seventh embodiment. That is, the CPU 125 storing the program is used. In the following description, the same components as those in the first embodiment will be described using the same reference numerals.

  22 and 23 are flowcharts for explaining the recording process to the recording layer in the seventh embodiment. A computer program for executing this processing is stored in advance in the memory circuit 126 of the CPU 125, and the CPU 125 performs these processing. In this embodiment, the test process when recording information on the first recording layer 11 of the optical disc 10 is substantially the same as the conventional one, but the test process when recording information on recording layers other than the first recording layer 11 is performed. Unlike the test process in the first recording layer 11, the time can be shortened.

  That is, when information is recorded on the first recording layer 11, the process shown in the flowchart of FIG. 22 is executed. In this process, the test is performed under two kinds of test recording conditions of laser power adjustment test recording and pulse width adjustment test recording by the same OPC as in the prior art, the recorded information is reproduced (SJ1), and the laser light irradiation condition The parameter (evaluation index) is detected (SJ2). At this time, recording and reproduction are set as one set, and this set is performed a predetermined number of times.

  Examples of parameters include β (Asymmetry), laser beam irradiation power, pulse phase, and the like in the case of DVD. Further, the laser power adjustment test recording is performed by changing the laser power (Wrigte PW) stepwise as shown in FIG. 4, and the pulse width adjustment test recording is similarly performed by changing the pulse width stepwise. When detecting the above parameters, if the strategy table data stored in the memory 127 can be used, it is used, and the strategy table data stored in the memory 127 cannot be used. In the case of the type of optical disk 10, a well-known auto strategy detection process is performed.

  Next, a characteristic relational expression is derived from the obtained parameters (SJ3). As this characteristic relational expression, for example, a characteristic relational expression representing the relationship between the laser power (Wrigte PW) and β as shown in the graph of FIG. 5, and a laser power (Wrigte PW) as shown in the graph of FIG. Characteristic relational expression representing the phase correction parameter in relation to the pulse phase, that is, the positional deviation of the rising edge and the falling edge of the pulse, and the positional deviation of the rising edge and the falling edge of the pulse as shown in the graph of FIG. ) And the pulse phase correction parameter in the relationship between the pulse phase and the characteristic relational expression. Here, two types of parameters (evaluation index) from the test information recorded by changing the laser power stepwise, that is, the characteristics representing the relationship between the laser power (Wrigte PW) and β as shown in the graph of FIG. A characteristic relational expression representing a phase correction parameter in the relation between the relational expression and the laser power (Wrigte PW) and the pulse phase as shown in the graph of FIG. 6 is derived.

  Thereafter, optimum values of the laser power and the pulse width are derived using the parameters obtained from the obtained characteristic relational expression (SJ4). Further, it is determined whether or not the optimum value can be applied to record information with a predetermined quality after adjustment at a desired recording speed (SJ5). In this adjustment, the laser power adjustment parameter (evaluation index) and the pulse width adjustment parameter (evaluation index) with respect to the stepwise change in the recording conditions of the laser power and the pulse width are used to record information with a predetermined quality. At least one of the laser power and the pulse width of the laser light applied to the recording layer is adjusted so as to have a suitable predetermined value. OPC may be performed for this adjustment.

  If the result of the determination in SJ5 is applicable, the process proceeds to the process of SJ8, which will be described later, and if it is not applicable, the recording speed is set to a predetermined recording speed or the recording is set to stop ( SJ6), it is determined whether or not to stop recording (SJ7). When the recording is stopped, the process proceeds to SJ10 described later, and when the recording speed is set to be lowered, the process proceeds to SJ5.

  As a result of the determination in SJ5, when the optimum value is applicable to a desired recording speed, the determination result, processing contents, parameters (evaluation index), and adjustment result information are recorded on the optical disk 10 and stored in the memory 127. Recording is performed in correspondence with the media ID of the optical disc 10 (SJ8). As described above, the information can be utilized when recording on the same type of optical disk 10 next time by keeping it as a record. The condition data used for test recording may be recorded in accordance with the above information. Further, the above information may be recorded only on either the optical disc 10 or the memory 127. In addition, information on only one of the judgment result or the processing content accompanying this judgment may be recorded, or information on only one of the parameter (evaluation index) or the adjustment result using the parameter may be recorded. It may be recorded.

  Thereafter, information is recorded on the optical disc 10 using the obtained optimum value (SJ9). Next, the determination result and the processing content are displayed on the display unit 131 (SJ10), and the information recording on the first recording layer 11 is terminated. Note that only one of the determination result or the processing content accompanying this determination may be displayed on the display unit 131.

  Further, when information is recorded on the recording layers 12 and 13 other than the first recording layer 11, the processing shown in the flowchart of FIG. 23 is performed. In this process, a test under only one type of test recording condition for only laser power adjustment test recording is performed by the same OPC as in the prior art, as many times as the number of set executions is smaller than the number of recording and reproduction set executions in the first recording layer 11. The reproduced information is reproduced (SK1), and a parameter (evaluation index) in the laser light irradiation condition is detected (SK2). Laser power adjustment test recording is performed by changing the laser power (Wrigte PW) step by step as shown in FIG.

  Next, a characteristic relational expression is derived from the obtained parameters (SK3). As this characteristic relational expression, for example, a characteristic relational expression representing a phase correction parameter in the relation between the laser power (Wrigte PW) and the pulse phase as shown in the graph of FIG. 8 is derived.

  Thereafter, using the parameters obtained from the characteristic relational expression obtained above and the characteristic relational expression obtained in the first recording layer 11, the pulse in the relationship between the positional deviation of the pulse in the other recording layers 12 and 13 and the pulse phase. A characteristic relational expression that represents the phase correction parameter, that is, the pulse phase correction parameter in the relationship between the pulse misalignment (Pluse (Topr, Tlast)) and the pulse phase as shown in the graph of FIG. 9 is predicted. (SK4).

  Next, optimum values of the laser power and the pulse width are derived using the above characteristic relational expression (SK5). Further, it is determined whether or not the optimum value can be applied to record information with a predetermined quality after adjustment at a desired recording speed (SK6). In this adjustment, the laser power adjustment parameter (evaluation index) and the pulse width adjustment parameter (evaluation index) with respect to the stepwise change in the recording conditions of the laser power and the pulse width are used to record information with a predetermined quality. At least one of the laser power and the pulse width of the laser light applied to the recording layer is adjusted so as to have a suitable predetermined value. OPC may be performed for this adjustment.

  If the result of the determination in SK6 is applicable, the process proceeds to SK9, which will be described later, and if it is not applicable, the recording speed is set to a predetermined recording speed or recording is set to stop ( SK7) It is determined whether or not to stop recording (SK8). When the recording is stopped, the process proceeds to SK11 described later, and when the recording speed is set to be lowered, the process proceeds to SK6. If the recording speed cannot be applied even if the recording speed is lowered, the process may be repeated from the process of the SK1 again instead of stopping the recording.

  As a result of the determination of SK6, when the optimum value is applicable to a desired recording speed, the determination result, processing contents, parameters (evaluation index), and adjustment result information are recorded on the optical disk 10 and stored in the memory 127. Recording is performed corresponding to the media ID of the optical disc 10 (SK9).

  Thereafter, information is recorded on the optical disk 10 using the obtained optimum value (SK10). Next, the determination result and the processing content are displayed on the display unit 131 (SK12), and the information recording on the second or third recording layer 12, 13 is finished.

  According to the above-described embodiment, the test information recording and reproducing set constituted by the stepwise change of the recording condition is executed on the first recording layer 11 a plurality of times, and the first recording layer 11 is based on the test result. Irradiation conditions suitable for recording information on the recording medium are derived, and the recording and reproduction set of test information in the test of the first recording layer 11 is performed on the recording layers 12 and 13 other than the first recording layer 11. The test information is recorded and reproduced with a set number of times smaller than the number of executions of the first or second, and based on the test result of the first recording layer 11 and the test result of the second or third recording layer 12, 13, Irradiation conditions suitable for recording information on the third recording layers 12 and 13 are derived, and information recording on the second or third recording layers 12 and 13 is performed using the irradiation conditions. 3 Irradiation conditions for recording layers 12 and 13 It is possible to shorten the test time to derive, it can be recorded in a short time information by shortening the test time before recording information.

  Further, in the test recording of the second or third recording layers 12 and 13, only the test for changing the laser power is performed, and the test for changing the pulse width that uses a lot of time and the test area is not performed. Can be further shortened.

  As described above, in the normal test recording, the characteristic relationship between the laser power and β is obtained in the laser power adjustment test, the optimum laser power is derived from this characteristic relationship, and the pulse-to-phase deviation is determined in the pulse width adjustment test. A characteristic relationship is obtained, and an optimum pulse width, that is, a strategy is obtained from this characteristic relationship. In the present embodiment, for the recording layers other than the first recording layer 11, recording and reproduction are set as one set and the number of sets is reduced. Only the laser power adjustment test is performed so that a strategy having the optimum laser power and pulse width can be derived.

  In the above embodiment, an example using a well-known multi-layer DVD as the optical disk 10 has been described. However, when the HD-DVD or a well-known Blu-ray disk is used as the optical disk 10, the above-described effects can be obtained by the same processing. Can be obtained.

  Next, an eighth embodiment of the present invention will be described.

  The apparatus configuration in this embodiment is the same as that of the first embodiment described above. The difference from the first embodiment is that the recording process in the recording layers 12 and 13 other than the first recording layer 11 is the first in the eighth embodiment. That is, a CPU 125 storing a computer program that is partially different from that of the seventh embodiment is used. In the following description, the same components as those in the first embodiment will be described using the same reference numerals.

  That is, in the optical recording apparatus 100 in the present embodiment, the information recording process on the first recording layer 11 of the optical disc 10 is the same as the process in the seventh embodiment shown in the flowchart of FIG. In addition, the information recording process to the recording layers 12 and 13 other than the first recording layer 11 is based on one type of test recording condition of only the pulse width adjustment test recording by the same OPC as shown in the flowchart of FIG. The test is performed for the number of set execution times smaller than the number of set execution times of recording and reproduction in the first recording layer 11, the recorded information is reproduced (SL1), and a parameter (evaluation index) in the laser light irradiation condition is detected (SL2). ). The pulse width adjustment test recording is performed by changing the pulse width step by step.

  Next, a characteristic relational expression is derived from the obtained parameters (SL3). As this characteristic relational expression, for example, as shown in the graph of FIG. 9, a characteristic relation representing a pulse phase correction parameter in the relation between the pulse misalignment (Pluse (Topr, Tlast)) and the pulse phase. Derive an expression.

  Thereafter, the pulse phase in the system between the laser power and the pulse phase in the other recording layers 12 and 13 is obtained by using the parameter obtained from the characteristic relational expression obtained above and the characteristic relational expression obtained in the first recording layer 11. A characteristic relational expression representing the correction parameter, that is, the phase correction parameter in the relationship between the laser power (Wrigte PW) and the pulse phase as shown in the graph of FIG. 8 is predicted (SL4).

  Next, optimum values of the laser power and the pulse width are derived using the above characteristic relational expression (SL5). Further, it is determined whether or not the optimum value can be applied to record information with a predetermined quality after adjustment at a desired recording speed (SL6). In this adjustment, the laser power adjustment parameter (evaluation index) and the pulse width adjustment parameter (evaluation index) with respect to the stepwise change in the recording conditions of the laser power and the pulse width are used to record information with a predetermined quality. At least one of the laser power and the pulse width of the laser light applied to the recording layer is adjusted so as to have a suitable predetermined value. OPC may be performed for this adjustment.

  As a result of the determination of SL6, when applicable, the process proceeds to SL9 described later, and when not applicable, the recording speed is set to a predetermined recording speed or the recording is set to stop ( SL7) It is determined whether or not to stop recording (SL8). When the recording is stopped, the process proceeds to SL11 described later, and when the recording speed is set to be lowered, the process proceeds to SL6. If the recording speed cannot be applied even if the recording speed is lowered, the processing may be repeated from the SL1 process instead of the recording stop.

  As a result of the determination of SL6, when the optimum value is applicable to the desired recording speed, the determination result, processing contents, parameters (evaluation index), and adjustment result information are recorded on the optical disk 10 and stored in the memory 127. Recording is performed in correspondence with the media ID of the optical disc 10 (SL9). As described above, the information can be utilized when recording on the same type of optical disk 10 next time by keeping it as a record. The condition data used for test recording may be recorded in accordance with the above information. Further, the above information may be recorded only on either the optical disc 10 or the memory 127. In addition, information on only one of the judgment result or the processing content accompanying this judgment may be recorded, or information on only one of the parameter (evaluation index) or the adjustment result using the parameter may be recorded. It may be recorded.

  Thereafter, information is recorded on the optical disc 10 using the optimum value obtained (SL10). Next, the determination result and the processing content are displayed on the display unit 131 (SL12), and the information recording on the second or third recording layer 12, 13 is finished. Note that only one of the determination result or the processing content accompanying this determination may be displayed on the display unit 131.

  According to the above-described embodiment, the test information recording and reproducing set constituted by the stepwise change of the recording condition is executed on the first recording layer 11 a plurality of times, and the first recording layer 11 is based on the test result. Irradiation conditions suitable for recording information on the recording medium are derived, and the recording and reproduction set of test information in the test of the first recording layer 11 is performed on the recording layers 12 and 13 other than the first recording layer 11. The test information is recorded and reproduced with a set number of times smaller than the number of executions of the first or second, and based on the test result of the first recording layer 11 and the test result of the second or third recording layer 12, 13, Irradiation conditions suitable for recording information on the third recording layers 12 and 13 are derived, and information recording on the second or third recording layers 12 and 13 is performed using the irradiation conditions. 3 Irradiation conditions for recording layers 12 and 13 It is possible to shorten the test time to derive, it can be recorded in a short time information by shortening the test time before recording information.

  Further, in the test recording of the second or third recording layers 12 and 13, only the test for changing the pulse width is performed, so that the test time can be further shortened.

  As described above, in the normal test recording, the characteristic relationship between the laser power and β is obtained in the laser power adjustment test, the optimum laser power is derived from this characteristic relationship, and the pulse-to-phase deviation is determined in the pulse width adjustment test. In this embodiment, only the pulse width adjustment test is performed on the recording layers other than the first recording layer 11, and the test recording condition is determined. By reducing the number and reducing the test time, a strategy having an optimum laser power and pulse width can be derived.

  In the above embodiment, an example using a known multi-layer DVD as the optical disk 10 has been described. However, when an HD-DVD or a well-known Blu-ray disk is used as the optical disk 10 as in the first embodiment. The same effect can be obtained by the same processing.

  Moreover, the said embodiment is only a specific example of this invention, and this invention is not limited only to the structure of the said embodiment. For example, in each of the above embodiments, the adjustment process is performed after obtaining the optimum value. However, if the adjustment process need not be performed, this adjustment process may be omitted. In addition, it is preferable to perform a process for displaying a decrease in recording speed, a process for canceling recording, a result of a determination process, and a process for recording this information as necessary.

  Further, in each of the above embodiments, the optimum value of the laser beam irradiated to the other recording layers 12 and 13 is obtained in a short time with the first recording layer 11 as a reference. However, recording layers other than the first recording layer can be obtained. As a reference, the optimum value of the laser beam irradiated to the other recording layer may be obtained in a short time. In each of the above embodiments, information recording is performed in order from the first recording layer 11 at a position away from the laser light irradiation surface to the third recording layer 13 at a position close to the irradiation surface. The information recording may be performed starting with a recording layer other than the first recording layer 11.

The figure which shows the structure of the optical recording device in 1st Embodiment of this invention, and the structure of an optical disk. The flowchart explaining the recording process to the 1st recording layer in 1st Embodiment of this invention. Flowchart for explaining recording processing to a recording layer other than the first recording layer in the first embodiment of the present invention. Diagram for explaining stepwise laser power change in laser power adjustment test recording Diagram showing the relationship between laser power and β The figure which shows the characteristic relation which expressed the pulse phase correction parameter in the relation between laser power and pulse phase The figure which shows the characteristic relation which expressed the pulse phase correction parameter in the relation between the positional deviation of the rise and fall of the pulse and the pulse phase The figure which shows the characteristic relation which expressed the phase correction parameter in the relation between laser power and pulse phase The figure which shows the characteristic relation which expressed the pulse phase correction parameter in the relation between the positional deviation of the rise and fall of the pulse and the pulse phase Diagram showing the relationship between laser power and asymmetry The figure which shows the characteristic relation which expressed the phase correction parameter in the relation between laser power and amplitude The figure which shows the characteristic relation which expressed the pulse phase correction parameter in the relation between the positional deviation of the rise and fall of the pulse and the pulse phase The figure which shows the characteristic relation which expressed the phase correction parameter in the relation between laser power and amplitude The figure which shows the characteristic relation which expressed the pulse phase correction parameter in the relation between the positional deviation of the rise and fall of the pulse and the pulse phase The flowchart explaining the recording process to recording layers other than the 1st recording layer in 2nd Embodiment of this invention. The flowchart explaining the recording process to the 1st recording layer in 3rd Embodiment of this invention. The flowchart explaining the recording process to recording layers other than the 1st recording layer in 3rd Embodiment of this invention. The flowchart explaining the recording process to recording layers other than the 1st recording layer in 4th Embodiment of this invention. Flowchart explaining the recording process to the first recording layer in the fifth embodiment of the present invention The flowchart explaining the recording process to recording layers other than the 1st recording layer in 5th Embodiment of this invention. Flowchart explaining recording processing to recording layers other than the first recording layer in the sixth embodiment of the present invention Flowchart explaining the recording process to the first recording layer in the seventh embodiment of the present invention The flowchart explaining the recording process to recording layers other than the 1st recording layer in 7th Embodiment of this invention. The flowchart explaining the recording process to recording layers other than the 1st recording layer in 8th Embodiment of this invention. The figure which shows the strategy table of a prior art example The figure which shows the strategy table of a prior art example

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Optical disk (recording medium), 11 ... 1st recording layer (one recording layer), 12 ... 2nd recording layer (other recording layer), 13 ... 3rd recording layer (other recording layer), 100 ... light Recording device, 110 ... optical pickup, 111 ... laser diode (LD), 112 ... photodetector (PD), 113 ... collimating lens, 114 ... objective lens, 115 ... detection lens, 116 ... beam splitter, 121 ... LD driver, 122 ... Slicer, 123 ... Demodulation circuit, 124 ... Characteristic value detection unit, 125 ... One-chip CPU element (CPU), 126 ... Memory circuit, 127 ... Memory, 128 ... Interface (I / F), 131 ... Display unit, 132 ... Operation Department.

Claims (36)

When the optical recording apparatus records information by irradiating a laser beam onto a recording medium composed of a plurality of layers including one recording layer and another recording layer, the test information is recorded in the test area of each recording layer. An optical recording method for reproducing information to derive a laser beam irradiation condition and recording information by irradiating the recording medium with a laser beam using the irradiation condition,
The optical recording device comprises:
A reference recording layer test step for recording and reproducing test information accompanied by a change in the type of recording condition in the one recording layer;
A reference recording layer irradiation condition derivation step for deriving an irradiation condition suitable for recording information on one recording layer based on the test result obtained by the reference recording layer test step;
Another recording layer test step for recording and reproducing test information in the other recording layer with a change count smaller than the change count of the type of test recording condition performed in the reference recording layer test step;
Based on the test result obtained by the reference recording layer test step and the test result obtained by the other recording layer test step, an irradiation condition suitable for recording information on the other recording layer is derived. And performing another recording layer irradiation condition deriving step. When the optical recording apparatus records information by irradiating a laser beam onto a recording medium composed of a plurality of layers including one recording layer and another recording layer, the test information is recorded in the test area of each recording layer. An optical recording method for reproducing information to derive a laser beam irradiation condition and recording information by irradiating the recording medium with a laser beam using the irradiation condition,
The optical recording device comprises:
A reference recording layer test step for recording and reproducing test information accompanied by a change in the type of recording condition in the one recording layer;
A reference recording layer irradiation condition derivation step for deriving an irradiation condition suitable for recording information on one recording layer based on the test result obtained by the reference recording layer test step;
Another recording layer test step for recording and reproducing test information on the other recording layer under any one of the test recording conditions performed in the reference recording layer test step;
Based on the test result obtained by the reference recording layer test step and the test result obtained by the other recording layer test step, an irradiation condition suitable for recording information on the other recording layer is derived. And performing another recording layer irradiation condition deriving step. When the optical recording apparatus records information by irradiating a laser beam onto a recording medium composed of a plurality of layers including one recording layer and another recording layer, the test information is recorded in the test area of each recording layer. An optical recording method for reproducing information to derive a laser beam irradiation condition and recording information by irradiating the recording medium with a laser beam using the irradiation condition,
The optical recording device comprises:
A reference recording layer test step for recording and reproducing test information under test recording conditions involving a plurality of condition changes to the one recording layer;
A reference recording layer irradiation condition derivation step for deriving an irradiation condition suitable for recording information on one recording layer based on the test result obtained by the reference recording layer test step;
Another recording layer test step for recording and reproducing test information to and from the other recording layer under a condition number smaller than the number of test recording conditions used in the reference recording layer test step;
Based on the test result obtained by the reference recording layer test step and the test result obtained by the other recording layer test step, an irradiation condition suitable for recording information on the other recording layer is derived. And performing another recording layer irradiation condition deriving step. When the optical recording apparatus records information by irradiating a laser beam onto a recording medium composed of a plurality of layers including one recording layer and another recording layer, the test information is recorded in the test area of each recording layer. An optical recording method for reproducing information to derive a laser beam irradiation condition and recording information by irradiating the recording medium with a laser beam using the irradiation condition,
The optical recording device comprises:
A reference recording layer test step for recording and reproducing test information on the one recording layer under a plurality of types of test recording conditions;
A reference recording layer irradiation condition derivation step for deriving an irradiation condition suitable for recording information on one recording layer based on the test result obtained by the reference recording layer test step;
Other recording layer test steps for recording and reproducing test information on the other recording layers,
Based on the test result obtained by the reference recording layer test step and the test result obtained by the other recording layer test step, an irradiation condition suitable for recording information on the other recording layer is derived. Execute the other recording layer irradiation condition derivation step,
The reference recording layer test step includes:
A first test information recording step for recording test information in the one recording layer;
Including a first test information reproducing step of reproducing the test information recorded in the first test information recording step,
The other recording layer test step includes:
A second test information recording step for recording test information in the other recording layer;
A second test information reproducing step of reproducing the test information recorded in the second test information recording step,
The number of times of switching between the second test information recording step and the second test information reproduction step is set smaller than the number of times of switching between the first test information recording step and the first test information reproduction step. Optical recording method. When the optical recording apparatus records information by irradiating a laser beam onto a recording medium composed of a plurality of layers including one recording layer and another recording layer, the test information is recorded in the test area of each recording layer. An optical recording method for reproducing information to derive a laser beam irradiation condition and recording information by irradiating the recording medium with a laser beam using the irradiation condition,
The optical recording device comprises:
A reference recording layer test step for executing a set of recording and reproduction of test information configured by stepwise change of recording conditions on the one recording layer a plurality of times;
A reference recording layer irradiation condition derivation step for deriving an irradiation condition suitable for recording information on one recording layer based on the test result obtained by the reference recording layer test step;
Another recording layer test step for recording and reproducing test information in the other recording layer at a number less than the number of times of execution of the recording and reproducing set of test information in the reference recording layer test step;
Based on the test result obtained by the reference recording layer test step and the test result obtained by the other recording layer test step, an irradiation condition suitable for recording information on the other recording layer is derived. And performing another recording layer irradiation condition deriving step. In the reference recording layer test step, recording and reproduction of test information in which the laser power recording conditions are changed stepwise and recording and reproduction of test information in which the pulse width recording conditions are changed stepwise in the one recording layer Both
In the other recording layer test step, recording and reproduction of test information for changing the laser power recording conditions in stages, recording test information for changing the recording conditions of pulse width in stages, 6. The optical recording method according to claim 1, wherein any one of reproduction is performed. In the reference recording layer test step, recording and reproduction of test information in which the laser power recording conditions are changed stepwise and recording and reproduction of test information in which the pulse width recording conditions are changed stepwise in the one recording layer Both
In the other recording layer test step, recording and reproduction of test information for changing the recording condition of laser power stepwise is performed on the other recording layer,
In the other recording layer irradiation condition derivation step, a laser power adjustment evaluation index and a pulse width adjustment evaluation index for a stepwise change in the recording condition of the laser power and pulse width obtained in the reference recording layer test step, From the evaluation index for laser power adjustment with respect to the stepwise change of the recording condition of the laser power obtained in the other recording layer test step, the pulse width with respect to the stepwise change of the recording condition of the pulse width in the other recording layer Deriving evaluation indicators for adjustment,
Further, the optical recording apparatus is provided with a laser power adjustment evaluation index and a pulse width adjustment evaluation index corresponding to a stepwise change in recording conditions of the laser power and the pulse width in the other recording layer. The adjustment step of adjusting at least one of the laser power and the pulse width of the laser light irradiated to the other recording layer so as to have a value is executed. An optical recording method according to claim 1. In the reference recording layer test step, recording and reproduction of test information in which the laser power recording conditions are changed stepwise and recording and reproduction of test information in which the pulse width recording conditions are changed stepwise in the one recording layer Both
In the other recording layer test step, recording and reproduction of test information for changing the recording condition of the pulse width in stages is performed on the other recording layer,
In the other recording layer irradiation condition derivation step, a laser power adjustment evaluation index and a pulse width adjustment evaluation index for a stepwise change in the recording condition of the laser power and pulse width obtained in the reference recording layer test step, Deriving an evaluation index for adjusting the laser power with respect to the stepwise change in the recording condition of the laser power from the evaluation index for adjusting the pulse width with respect to the stepwise change in the recording condition obtained in the other recording layer test step. And
Further, the optical recording apparatus is provided with a laser power adjustment evaluation index and a pulse width adjustment evaluation index corresponding to a stepwise change in recording conditions of the laser power and the pulse width in the other recording layer. The adjustment step of adjusting at least one of the laser power and the pulse width of the laser light irradiated to the other recording layer so as to have a value is executed. An optical recording method according to claim 1. Further, the optical recording apparatus determines that recording is possible when recording at a predetermined quality is possible by the adjustment at the adjustment step at a predetermined recording speed determined in advance, and at the predetermined quality by the adjustment at the adjustment step. The optical recording method according to claim 7 or 8, wherein a determination step of determining that recording is impossible when recording is impossible is performed. Further, the optical recording apparatus performs actual recording at the predetermined recording speed when it is determined that recording is possible at the predetermined recording speed in the determination step, and at the predetermined recording speed in the determination step. The optical recording method according to claim 9, wherein when it is determined that recording is difficult, a control step of performing recording at a recording speed lower than the predetermined recording speed or stopping recording is executed. The optical recording apparatus performs actual recording at the predetermined recording speed when it is determined in the determining step that recording is possible at a predetermined recording speed, and recording is performed at the predetermined recording speed in the determining step. 10. The optical recording method according to claim 9, wherein when it is determined that it is difficult, the other recording layer test step is executed again. The optical recording apparatus further executes a display step for displaying at least one of a determination result obtained by the determination step or a processing content corresponding to the determination result. Optical recording method. Further, the optical recording apparatus transfers at least one of the determination result of the determination step or the processing content for the determination result to at least one of the recording medium on which the test recording is performed or the optical recording apparatus on which the test recording is performed. The optical recording method according to claim 9, wherein a recording step is executed. Further, the optical recording apparatus receives at least one of a determination result in the determination step, an evaluation index derived in the other recording layer irradiation condition derivation step, and data indicating an adjustment result in the adjustment step. The optical recording method according to claim 9, wherein the step of recording on at least one of a recording medium on which test recording has been performed or an optical recording apparatus on which test recording has been performed is executed. The optical recording method according to claim 14, wherein one of the evaluation index and the data indicating the adjustment result includes data relating to a test recording condition. When the optical recording apparatus records information by irradiating a laser beam onto a recording medium composed of a plurality of layers including one recording layer and another recording layer, the test information is recorded in the test area of each recording layer. An evaluation index acquisition method in an optical recording method in which the recorded test information is reproduced later to obtain an evaluation index for determining the laser light irradiation condition, and the laser light irradiation condition is adjusted using the evaluation index. There,
The optical recording device comprises:
A test information recording step for recording test information by gradually changing the recording condition of laser power in the one recording layer;
For reproducing the test information recorded in the test information recording step, for adjusting the pulse width including at least one of a phase shift, a length shift, and an amplitude shift of the pulse with respect to a change in the recording condition of the laser power An acquisition step for acquiring a change in the evaluation index;
Obtaining a correlation between the change in the laser power and the change in the obtained evaluation index for pulse width adjustment;
A second test information recording step for recording test information on the other recording layer by changing the recording condition of the laser power stepwise;
A calculation step of adapting a result of the second test recording to the correlation and calculating a relationship of a change in an evaluation index for pulse width adjustment with a change in laser power in another recording layer;
And a step of obtaining a pulse width adjustment evaluation index for determining a pulse width condition in the other recording layer using the relationship obtained in the calculation step. When the optical recording apparatus records information by irradiating a laser beam onto a recording medium composed of a plurality of layers including one recording layer and another recording layer, the test information is recorded in the test area of each recording layer. Reproducing the recorded test information later to obtain an evaluation index of the laser light irradiation conditions, and an evaluation index acquisition method in the optical recording method of adjusting the laser light irradiation conditions using the evaluation index,
The optical recording device comprises:
A test information recording step for recording test information by stepwise changing a recording condition of a pulse width in the one recording layer;
An acquisition step of acquiring an evaluation index for laser power adjustment with respect to a change in recording condition of a pulse width when reproducing the test information recorded in the one recording layer by the test information recording step;
Obtaining a correlation between the change in the pulse width and the change in the evaluation index for laser power adjustment;
A second test information recording step of recording test information on the other recording layer by gradually changing the recording condition of the pulse width;
A calculation step of adapting the second test recording result to the correlation and calculating a relationship of a change in an evaluation index for laser power adjustment to a change in a pulse width recording condition in another recording layer;
And obtaining a laser power adjustment evaluation index for determining a laser power condition in the other recording layer using the relationship obtained in the calculation step. When an optical recording apparatus records information by irradiating a recording layer of a recording medium with laser light, information is recorded on the recording layer and information is reproduced to obtain an evaluation index of laser light irradiation conditions. , An evaluation index acquisition method in an optical recording method for adjusting the irradiation condition of laser light using the evaluation index,
The optical recording device comprises:
An information recording step for recording test recording information and / or user data recording information on the recording layer;
Replaying the information recorded in the information recording step, and obtaining a plurality of types of evaluation indices relating to laser light irradiation conditions from the reproduction information. The evaluation index acquisition method according to claim 18, wherein the plurality of types of evaluation indices include at least one of a laser power adjustment evaluation index and a pulse width adjustment evaluation index. When recording information by irradiating a laser beam onto a recording medium composed of a plurality of layers including one recording layer and another recording layer, the test information is recorded and reproduced in the test area of each recording layer. An optical recording apparatus for deriving light irradiation conditions and recording information by irradiating the recording medium with laser light using the irradiation conditions,
Reference recording layer test means for recording and reproducing test information accompanied by a change in the type of recording conditions on the one recording layer;
Reference recording layer irradiation condition deriving means for deriving irradiation conditions suitable for recording information on one recording layer based on the test results obtained by the reference recording layer testing means;
Other recording layer test means for recording and reproducing test information on the other recording layer with a smaller number of changes than the number of changes in the type of test recording conditions performed by the reference recording layer test means,
Based on the test result obtained by the reference recording layer test means and the test result obtained by the other recording layer test means, an irradiation condition suitable for recording information on the other recording layer is derived. An optical recording apparatus comprising: another recording layer irradiation condition deriving unit. When recording information by irradiating a laser beam onto a recording medium composed of a plurality of layers including one recording layer and another recording layer, the test information is recorded and reproduced in the test area of each recording layer. An optical recording apparatus for deriving light irradiation conditions and recording information by irradiating the recording medium with laser light using the irradiation conditions,
Reference recording layer test means for recording and reproducing test information accompanied by a change in the type of recording conditions on the one recording layer;
Reference recording layer irradiation condition deriving means for deriving irradiation conditions suitable for recording information on one recording layer based on the test results obtained by the reference recording layer testing means;
Other recording layer test means for recording and reproducing test information on the other recording layer under any one of the test recording conditions performed by the reference recording layer test means,
Based on the test result obtained by the reference recording layer test means and the test result obtained by the other recording layer test means, an irradiation condition suitable for recording information on the other recording layer is derived. An optical recording apparatus comprising: another recording layer irradiation condition deriving unit. When recording information by irradiating a laser beam onto a recording medium composed of a plurality of layers including one recording layer and another recording layer, the test information is recorded and reproduced in the test area of each recording layer. An optical recording apparatus for deriving light irradiation conditions and recording information by irradiating the recording medium with laser light using the irradiation conditions,
A reference recording layer test means for recording and reproducing test information under test recording conditions involving a plurality of condition changes to the one recording layer;
Reference recording layer irradiation condition derivation means for deriving irradiation conditions suitable for recording information on one recording layer based on the test results obtained by the reference recording layer test means;
Other recording layer test means for recording and reproducing test information on the other recording layer under a condition number smaller than the number of test recording conditions used in the reference recording layer test means,
Based on the test result obtained by the reference recording layer test means and the test result obtained by the other recording layer test means, an irradiation condition suitable for recording information on the other recording layer is derived. An optical recording apparatus comprising: another recording layer irradiation condition deriving unit. When recording information by irradiating a laser beam onto a recording medium composed of a plurality of layers including one recording layer and another recording layer, the test information is recorded and reproduced in the test area of each recording layer. An optical recording apparatus for deriving light irradiation conditions and recording information by irradiating the recording medium with laser light using the irradiation conditions,
First test information recording means for recording test information on the one recording layer under a plurality of types of test recording conditions;
First test information reproducing means for reproducing the test information recorded by the first test information recording means;
Reference recording layer irradiation condition derivation means for deriving irradiation conditions suitable for recording information on one recording layer based on the test results obtained by the reference recording layer test means;
Second test information recording means for recording test information in the other recording layer;
Second test information reproducing means for reproducing the test information recorded by the second test information recording means;
The test information recording by the second test information recording means and the second test information are more than the number of times of switching between the test information recording by the first test information recording means and the test information reproduction by the first test information reproducing means. Switching means for switching the recording and reproduction of the test information by reducing the number of times of switching the reproduction of the test information by the reproduction means;
Based on the test result obtained by the reference recording layer test means and the test result obtained by the other recording layer test means, an irradiation condition suitable for recording information on the other recording layer is derived. An optical recording apparatus comprising: another recording layer irradiation condition deriving unit. When recording information by irradiating a laser beam onto a recording medium composed of a plurality of layers including one recording layer and another recording layer, the test information is recorded and reproduced in the test area of each recording layer. An optical recording apparatus for deriving light irradiation conditions and recording information by irradiating the recording medium with laser light using the irradiation conditions,
Reference recording layer test means for executing a set of recording and reproduction of test information constituted by stepwise change of recording conditions on the one recording layer a plurality of times;
Reference recording layer irradiation condition derivation means for deriving irradiation conditions suitable for recording information on one recording layer based on the test results obtained by the reference recording layer test means;
Other recording layer test means for recording and reproducing test information at a number less than the number of times the set of recording and reproducing test information in the reference recording layer test means is performed on the other recording layer,
Based on the test result obtained by the reference recording layer test means and the test result obtained by the other recording layer test means, an irradiation condition suitable for recording information on the other recording layer is derived. An optical recording apparatus comprising: another recording layer irradiation condition deriving unit. When recording information by irradiating a laser beam to a recording medium composed of a plurality of layers including one recording layer and another recording layer, the recorded test is performed after recording test information in the test area of each recording layer. An optical recording apparatus that performs information reproduction to derive a laser beam irradiation condition, irradiates the recording medium with the laser beam using the irradiation condition, and records information.
Test information recording means for recording test information by gradually changing the recording condition of laser power in the one recording layer;
When reproducing test information recorded by the test information recording means, a pulse width evaluation index including at least one of a phase shift, a length shift, and an amplitude shift of a pulse with respect to a change in a recording condition of a laser power Acquisition means for acquiring changes in
Correlation obtaining means for obtaining a correlation between the change in the laser power and the change in the pulse width evaluation index;
A second test information recording means for recording test information on the other layer by gradually changing the recording condition of the laser power;
A calculation means for adapting the result of the second test recording to the correlation obtained by the correlation acquisition means and calculating a relationship of a change in pulse width evaluation index with respect to a change in pulse width in another recording layer;
Pulse width adjustment evaluation index acquisition means for obtaining a pulse width adjustment evaluation index for determining a pulse width condition in the other layer using the relationship obtained by the calculation means. Optical recording device. When recording information by irradiating a laser beam to a recording medium composed of a plurality of layers including one recording layer and another recording layer, the recorded test is performed after recording test information in the test area of each recording layer. Information is reproduced to obtain an evaluation index of the irradiation condition of the laser beam, the irradiation condition of the laser beam is derived using the evaluation index, and the recording medium is irradiated with the laser beam using the irradiation condition to obtain information. An optical recording apparatus for recording
Test information recording means for recording test information by stepwise changing the recording condition of the pulse width in the one recording layer;
Laser power adjustment evaluation index acquisition means for acquiring a laser power adjustment evaluation index for a change in recording condition of a pulse width when reproducing the test information recorded on the one recording layer by the test information recording means;
A correlation acquisition means for obtaining a correlation between the change in the pulse width and the change in the evaluation index for laser power adjustment;
A second test information recording means for recording test information on the other recording layer by stepwise changing a recording condition of a pulse width;
And a calculating means for calculating an evaluation index for laser power adjustment with respect to a change in recording condition of a pulse width in another recording layer by adapting the second test recording result to the correlation. Recording device. When information is recorded by irradiating the recording layer of the recording medium with laser light, information is recorded on the recording layer and information is reproduced to derive the laser light irradiation condition, and the irradiation condition is used to An optical recording apparatus for recording information by irradiating a recording medium with laser light,
Information recording means for recording test recording information and / or user data recording information on the recording layer;
An optical recording apparatus comprising: an evaluation index acquisition unit that reproduces information recorded by the information recording unit, and acquires a plurality of types of evaluation indexes relating to laser light irradiation conditions from the reproduction information. When recording information by irradiating a laser beam onto a recording medium composed of a plurality of layers including one recording layer and another recording layer, the test information is recorded and reproduced in the test area of each recording layer. A one-chip CPU element used in an optical recording apparatus for deriving light irradiation conditions and irradiating the recording medium with laser light using the irradiation conditions to record information,
A memory circuit in which a computer program for controlling operation is recorded;
The memory circuit includes
A reference recording layer test step for recording and reproducing test information accompanied by a change in the type of recording condition in the one recording layer;
A reference recording layer irradiation condition derivation step for deriving an irradiation condition suitable for recording information on one recording layer based on the test result obtained by the reference recording layer test step;
Another recording layer test step for recording and reproducing test information to and from the other recording layer with a smaller number of changes than the number of changes in the type of test recording conditions performed by the reference recording layer test step;
Based on the test result obtained by the reference recording layer test step and the test result obtained by the other recording layer test step, an irradiation condition suitable for recording information on the other recording layer is derived. A one-chip CPU element, wherein a computer program including another recording layer irradiation condition deriving step is stored. When recording information by irradiating a laser beam onto a recording medium composed of a plurality of layers including one recording layer and another recording layer, the test information is recorded and reproduced in the test area of each recording layer. A one-chip CPU element used in an optical recording apparatus for deriving light irradiation conditions and irradiating the recording medium with laser light using the irradiation conditions to record information,
A memory circuit in which a computer program for controlling operation is recorded;
The memory circuit includes
A reference recording layer test step for recording and reproducing test information accompanied by a change in the type of recording condition in the one recording layer;
A reference recording layer irradiation condition derivation step for deriving an irradiation condition suitable for recording information on one recording layer based on the test result obtained by the reference recording layer test step;
Another recording layer test step for recording and reproducing test information on the other recording layer under any one of the test recording conditions performed in the reference recording layer test step;
Based on the test result obtained by the reference recording layer test step and the test result obtained by the other recording layer test step, an irradiation condition suitable for recording information on the other recording layer is derived. A one-chip CPU element, wherein a computer program including another recording layer irradiation condition deriving step is stored. When recording information by irradiating a laser beam onto a recording medium composed of a plurality of layers including one recording layer and another recording layer, the test information is recorded and reproduced in the test area of each recording layer. A one-chip CPU element used in an optical recording apparatus for deriving light irradiation conditions and irradiating the recording medium with laser light using the irradiation conditions to record information,
A memory circuit in which a computer program for controlling operation is recorded;
The memory circuit includes
A reference recording layer test step for recording and reproducing test information under test recording conditions involving a plurality of condition changes to the one recording layer;
A reference recording layer irradiation condition derivation step for deriving an irradiation condition suitable for recording information on one recording layer based on the test result obtained by the reference recording layer test step;
Another recording layer test step for recording and reproducing test information on the other recording layer with a condition number smaller than the number of test recording conditions used in the reference recording layer test step;
Based on the test result obtained by the reference recording layer test step and the test result obtained by the other recording layer test step, an irradiation condition suitable for recording information on the other recording layer is derived. A one-chip CPU element, wherein a computer program including another recording layer irradiation condition deriving step is stored. When recording information by irradiating a laser beam onto a recording medium composed of a plurality of layers including one recording layer and another recording layer, the test information is recorded and reproduced in the test area of each recording layer. A one-chip CPU element used in an optical recording apparatus for deriving light irradiation conditions and irradiating the recording medium with laser light using the irradiation conditions to record information,
A memory circuit in which a computer program for controlling operation is recorded;
The memory circuit includes
A first test information recording step of recording test information on the one recording layer under a plurality of types of test recording conditions;
A first test information reproducing step of reproducing the test information recorded in the first test information recording step;
A reference recording layer irradiation condition derivation step for deriving an irradiation condition suitable for recording information on one recording layer based on the test result obtained by the reference recording layer test step;
A second test information recording step for recording test information in the other recording layer;
A second test information reproducing step of reproducing the test information recorded in the second test information recording step;
The test information recording by the second test information recording means and the second test information are more than the number of times of switching between the test information recording by the first test information recording step and the test information reproduction by the first test information reproducing means. Reducing the number of times of switching between reproduction of the test information by the reproduction means and switching between recording and reproduction of the test information;
Based on the test result obtained by the reference recording layer test step and the test result obtained by the other recording layer test step, an irradiation condition suitable for recording information on the other recording layer is derived. A one-chip CPU element, wherein a computer program including another recording layer irradiation condition deriving step is stored. When recording information by irradiating a laser beam onto a recording medium composed of a plurality of layers including one recording layer and another recording layer, the test information is recorded and reproduced in the test area of each recording layer. A one-chip CPU element used in an optical recording apparatus for deriving light irradiation conditions and irradiating the recording medium with laser light using the irradiation conditions to record information,
A memory circuit in which a computer program for controlling operation is recorded;
The memory circuit includes
A reference recording layer test step for executing a set of recording and reproduction of test information configured by stepwise change of recording conditions on the one recording layer a plurality of times;
A reference recording layer irradiation condition derivation step for deriving an irradiation condition suitable for recording information on one recording layer based on the test result obtained by the reference recording layer test step;
Another recording layer test step for recording and reproducing test information in the other recording layer at a number less than the number of times of execution of the recording and reproducing set of test information in the reference recording layer test step;
Based on the test result obtained by the reference recording layer test step and the test result obtained by the other recording layer test step, an irradiation condition suitable for recording information on the other recording layer is derived. A one-chip CPU element, wherein a computer program including another recording layer irradiation condition deriving step is stored. When recording information by irradiating a laser beam onto a recording medium composed of a plurality of layers including one recording layer and another recording layer, the test information is recorded and reproduced in the test area of each recording layer. A one-chip CPU element used in an optical recording apparatus for deriving light irradiation conditions and irradiating the recording medium with laser light using the irradiation conditions to record information,
A memory circuit in which a computer program for controlling operation is recorded;
The memory circuit includes
A test information recording step for recording test information by gradually changing the recording condition of laser power in the one recording layer;
When reproducing the test information recorded in the test information recording step, a pulse width evaluation index including at least one of a phase shift, a length shift, and an amplitude shift of the pulse with respect to a change in the recording condition of the laser power An acquisition step for acquiring a change in;
Obtaining a correlation between the change in the power and the change in the pulse width evaluation index;
A second test information recording step for recording test information on the other layer by gradually changing the recording condition of the laser power; and
A calculation step of adapting a result of the second test recording to the correlation and calculating a relationship of a change in a pulse width evaluation index to a change in a pulse width in another recording layer;
And a step of obtaining a pulse width adjustment evaluation index for determining a pulse width condition in the other layer using the relationship obtained in the calculation step. CPU element. When recording information by irradiating a laser beam onto a recording medium composed of a plurality of layers including one recording layer and another recording layer, the test information is recorded and reproduced in the test area of each recording layer. A one-chip CPU element used in an optical recording apparatus for deriving light irradiation conditions and irradiating the recording medium with laser light using the irradiation conditions to record information,
A memory circuit in which a computer program for controlling operation is recorded;
The memory circuit includes
A test information recording step for recording test information by stepwise changing a recording condition of a pulse width in the one recording layer;
An acquisition step of acquiring an evaluation index for laser power adjustment with respect to a change in recording condition of a pulse width when reproducing the test information recorded in the one recording layer by the test information recording step;
Obtaining a correlation between the change in the pulse width and the change in the evaluation index for laser power adjustment;
A second test information recording step of recording test information on the other recording layer by gradually changing the recording condition of the pulse width;
A computer program is stored that includes a calculation step of calculating an evaluation index for laser power adjustment with respect to a change in recording condition of a pulse width in another recording layer by adapting the second test recording result to the correlation. A one-chip CPU element. When recording information by irradiating a recording medium consisting of a plurality of layers including one recording layer and another recording layer with laser light, information is recorded on and reproduced from each recording layer. A one-chip CPU element used in an optical recording apparatus for recording information by irradiating the recording medium with a laser beam using the irradiation condition,
A memory circuit in which a computer program for controlling operation is recorded;
The memory circuit includes
A recording step of recording test recording information and / or user data recording information on the recording layer;
A one-chip storing a computer program including reproducing the information recorded in the information recording step and acquiring a plurality of types of evaluation indices relating to laser light irradiation conditions from the reproduced information CPU element. When recording information by irradiating a laser beam onto a recording medium composed of a plurality of layers including one recording layer and another recording layer, the test information is recorded and reproduced in the test area of each recording layer. A computer program for operating a CPU element used in an optical recording apparatus for deriving light irradiation conditions and irradiating the recording medium with laser light using the irradiation conditions to record information,
20. A computer program comprising the processing steps according to any one of claims 1 to 19.

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