JP2002245627A - Optical information recorder, optical information recording method and recording medium using therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow the information recording operation while correctively controlling the deviation of the optimum recording power due to the fluctuation of the LD power, tilting, defocusing, variance of the media sensitivity, etc., by exactly detecting the forming state of a recording mark in the process of recording operation. SOLUTION: By a photodetector 4, the reflected light with respect to the light irradiated on the recording medium is received and converted to a photodetecting signal, and by a 1st S/H part 5, a recording mark level of the above photodetecting signal is detected in the process of forming the recording mark, and by a 2nd S/H part 6, a space level of the above photodetecting signal is detected in the process of irradiating the LD 1 with the recording power not forming the recording mark, then the recording power with respect to the LD 1 is controlled by a controller 7 and an LD control part 2 on the basis of the recording mark level and the space level.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a CD-R / R
Light is a recordable optical disc drive such as a CD-R drive or a DVD-R drive that irradiates light from a light source such as a semiconductor laser light source to a recording medium such as a W or DVD-R to record various data. The present invention relates to an information recording device, an optical information recording method, and a recording medium used for the same.

[0002]

2. Description of the Related Art In recent years, recordable optical disk drive devices such as CD-R drive devices have been put into practical use.
In addition, research is being conducted to increase the capacity and speed of recording. Examples of the recordable optical disk medium include a write-once optical disk using a dye-based medium, a rewritable optical disk using a magneto-optical medium, a phase change medium, and the like. In a general optical disc recording apparatus, a semiconductor laser light source (laser diode: Laser Diode:
LD)) as a light source, and irradiates a recording medium such as an optical disk as described above with a laser beam (irradiation light) pulse-modulated by recording information to form a recording mark on its recording surface.

Since the formation state of the recording mark on the recording surface changes depending on the recording power of the LD at the time of this recording, conventionally, in order to find a recording power suitable for the characteristics of the recording medium,
As a preparation for the start of recording, test writing is performed in advance in a predetermined area while changing the recording power, and after the test writing, the recording power for recording the area where the symmetry (asymmetry) of the reproduced signal in the area where the test writing is performed is the best is recorded. Optimal recording power determination method (Optimum) determined as optimal recording power
m Power Control (OPC) is used. At the time of actual data recording, the OP
Recording is performed while maintaining the optimum recording power obtained by C.

However, even if the optimum recording power is obtained by trial writing and data is recorded while maintaining the optimum recording power, the recording power applied to the recording medium due to the temperature change of the light emission output of the LD, etc. Is different from the optimum recording power, or the optimum recording power is different in the data recording area due to sensitivity variations in the plane of the recording medium or tilt of the optical disk with respect to laser irradiation light called tilt, etc. There is a problem that recording cannot be performed with the recording power.

[0005] In order to solve such problems,
When recording data on an optical disk, an optical information recording device that detects a change in reflectance during recording and controls the output of a light source based on the detected signal (for example, Japanese Patent Publication No. 57-606).
No. 96). This optical information recording apparatus can obtain the formation state of a recording mark during recording by detecting the amount of reflected light from the recording medium during recording power irradiation. Recording can be performed while controlling so as to correct the deviation of the optimum recording power due to sensitivity variation or the like. More specifically, when performing the same test writing as described above, the detection signal indicating the change in the reflected light amount is held in association with the written recording power, and the optimum recording power is determined based on the symmetry of the reproduction signal after the test writing. At the same time as the calculation, the detection signal indicating the change in the reflected light amount is set as a control target value, and the LD recording power is sequentially controlled.

[0006] The same technology as described above has been put to practical use in a CD-R drive device, and in general, this control method is applied to a running OPC (Running-Optimum PoC).
Weir Control (R-OPC).
Meanwhile, an optical pickup that irradiates light emitted from a light source onto an optical disc and receives reflected light with respect to the irradiated light has a polarizing beam splitter (Polarizing Beam Splitter) in order to separate the irradiated light from the reflected light.
An optical isolator composed of a (tter: PBS) and a 波長 wavelength plate is widely used. The detailed description thereof is a known technique (for example, it is described in detail in pp. 66-75 of "Optical Disc Technology" supervised by Radio Engineering Co., Ltd.), so detailed description is omitted. Ideally, 100% of the reflected light from the medium can enter the light receiving element.

[0007]

However, in the above-mentioned conventional optical information recording apparatus, the reflected light from an optical disk using a substrate having birefringence characteristics is not in an ideal polarization state, but is partially reflected. There is a problem that the light returns to the LD direction and the amount of light received by the light receiving element decreases. Further, when the birefringence characteristic changes depending on the position of the optical disk, even if the disk reflectance and the irradiation light amount are constant, as shown in FIG. (a) and (b)), the amount of received light varies, that is, the return path efficiency varies.

Further, it is known that a polycarbonate resin often used as a substrate material of an optical disk has different birefringence characteristics depending on the above-mentioned disk position (radial position) due to distortion generated during molding of the optical disk. When running OPC is performed on an optical information recording apparatus having the above-described optical system on a recording medium having various characteristics, there is a problem that the recording power cannot be accurately controlled. In other words, if the amount of received light decreases due to a change in the return path efficiency, for example, the recording medium is irradiated with the appropriate recording power and the recording mark is formed properly, but the amount of received light decreases. There has been a problem that erroneous control for reducing the recording power to perform correction is performed. There is also a problem that the amount of received light varies due to variations in the reflectivity in the disk surface, and the same problem as described above may occur.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and there are cases where the return path efficiency varies depending on the position of the recording medium due to the influence of birefringence, etc.
Even when the amount of received light fluctuates due to variations in reflectivity, the recording mark formation state during recording is accurately detected, and the optimum recording power due to LD power fluctuation, tilt, defocus, media sensitivity variation, etc. It is an object of the present invention to be able to record information while correcting and controlling the deviation.

[0010]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention modulates output light of a light source based on predetermined information and irradiates the recording medium with light, and based on the intensity of the irradiated light, irradiates a recording surface. In an optical information recording apparatus that records information by forming a recording mark in which the reflectance of light changes or not, a light receiving unit that receives reflected light with respect to the irradiation light on the recording medium and converts the reflected light into a light reception signal, First detecting means for detecting the level of the light receiving signal at a predetermined timing during the formation of the recording mark, and at a predetermined timing during irradiation of output light from the light source with a recording power that does not form a recording mark on the recording surface; A second detecting means for detecting a level of a light receiving signal; and, when modulating output light of the light source based on predetermined information, a level detected by the first detecting means and the second detecting means. On the basis of the detected level by is provided with a light source control means for controlling the recording power for the light source.

[0011] Also, it is desired to modulate the output light of the light source on the basis of predetermined information and irradiate the recording medium with light, and to determine whether or not to form a recording mark whose light reflectance changes on the recording surface based on the intensity of the irradiation light. An optical information recording apparatus for recording information by using a light receiving means for receiving reflected light with respect to the irradiation light to the recording medium and converting the reflected light into a light receiving signal; and a level of the light receiving signal at a predetermined timing during formation of the recording mark. First detecting means for detecting the level of the received light signal while irradiating the recording surface with the output light from the light source at a predetermined reproducing power, and detecting the recording medium in a plurality of areas. Level holding means for associating and holding the level detected by the second detection means for each of the divided areas, and outputting a level corresponding to the recording area during recording; When modulated based on the broadcast may be provided with a light source control means for controlling recording power with respect to the light source based on the level output from the detected level and the level holding means by said first detection means.

Further, in the optical information recording apparatus as described above, it is preferable to provide a normalizing means for normalizing the level detected by the first detecting means with the recording power of the light source.

In addition, the output light of the light source is modulated based on predetermined information and irradiated on a recording medium, and whether or not a recording mark whose light reflectance changes on a recording surface based on the intensity of the irradiated light is formed. An optical information recording apparatus for recording information by receiving light reflected by the irradiation light on the recording medium and converting the reflected light into a light reception signal; and Detecting means for detecting a second level of the light-receiving signal at a predetermined timing while irradiating the output light from the light source with a recording power that does not form a recording mark on the recording surface; Light source control means for controlling the recording power for the light source based on the first level and the second level detected by the detection means when modulating based on predetermined information. It may be provided.

Further, the output light of the light source is modulated based on predetermined information and irradiated onto a recording medium, and whether or not a recording mark whose light reflectance changes on a recording surface based on the intensity of the irradiated light is formed. An optical information recording apparatus for recording information by receiving light reflected by the irradiation light on the recording medium and converting the reflected light into a light reception signal; and A level detecting means for detecting a second level of the light receiving signal while irradiating the recording surface with output light from the light source at a predetermined reproduction power; and an area obtained by dividing the recording medium into a plurality of areas. Second level holding means for associating and holding a second level detected by the detecting means for each time, and outputting a second level corresponding to a recording area during recording; When modulating based on information, light source control means for controlling the recording power for the light source based on the first level detected by the detection means and the second level output from the second level holding means. It is good to provide.

In the above-mentioned optical information recording apparatus, it is preferable to provide a normalizing means for normalizing the first level detected by the detecting means with the recording power of the light source.

Further, the output light of the light source is split into a main light beam and a sub light beam, modulated based on predetermined information and irradiated on a recording medium, and the recording surface is determined based on the intensity of the irradiation light of the main light beam. An optical information recording apparatus for recording information by forming a recording mark whose light reflectance changes on the recording medium, wherein the first light receiving section receives reflected light with respect to the irradiation of the main light beam onto the recording medium; A first light receiving means for converting the signal into a signal, a second light receiving means for receiving reflected light of the sub light beam irradiated on the recording medium and converting the reflected light into a second light receiving signal, and forming the recording mark. First detecting means for detecting the level of the first light receiving signal at a predetermined timing, second detecting means for detecting the level of the second light receiving signal at the predetermined timing, and output light of the light source. Based on the predetermined information When the modulation may be provided with a light source control means for controlling recording power with respect to the light source based on the level detected by said first detected by the detecting means levels and the second detecting means.

Also, the output light of the light source is split into a main light beam and a sub light beam, modulated based on predetermined information and irradiated on a recording medium, and the recording surface is determined based on the intensity of the irradiation light of the main light beam. An optical information recording apparatus for recording information by forming a recording mark whose light reflectance changes on the recording medium, wherein the first light receiving section receives reflected light with respect to the irradiation of the main light beam onto the recording medium; A first light receiving means for converting the signal into a signal, a second light receiving means for receiving reflected light of the sub light beam irradiated on the recording medium and converting the reflected light into a second light receiving signal, and forming the recording mark. A first detecting means for detecting a level of the first light receiving signal at a predetermined timing, a second detecting means for detecting a DC component of the second light receiving signal, and an output light of the light source for a predetermined information. When modulating based on It may be provided with a light source control means for controlling recording power with respect to the light source based on a DC component detected by the detected level and said second detecting means by a detection means.

Further, in the optical information recording apparatus as described above, the second light receiving means receives the reflected light of the sub-light beam irradiating the unrecorded area of the recording medium and generates a second light receiving signal. It is good to convert it into

The output light of the light source is modulated on the basis of predetermined information to irradiate a recording medium, and whether or not to form a recording mark whose light reflectance changes on a recording surface based on the intensity of the irradiation light is determined. In the optical information recording method of recording information by, the reflected light for the irradiation light to the recording medium is received and converted into a light reception signal, and the recording mark level of the light reception signal is detected during formation of the recording mark, Detecting a variation and variation of the light receiving signal with respect to the recording medium, correcting the recording mark level based on the variation and variation of the light receiving signal, and determining a recording power for the light source based on the corrected recording mark level. Should be controlled.

Further, the output light of the light source is modulated based on predetermined information and irradiated on a recording medium, and whether or not a recording mark whose light reflectance changes on the recording surface based on the intensity of the irradiated light is formed. In the optical information recording method of recording information by, the reflected light for the irradiation light to the recording medium is received and converted into a light reception signal, and the recording mark level of the light reception signal is detected during formation of the recording mark, Preferably, a space level of the light receiving signal is detected while the light source is irradiated with a recording power that does not form a recording mark, and the recording power for the light source is controlled based on the recording mark level and the space level.

The output light of the light source is modulated based on predetermined information and irradiated on a recording medium, and whether or not a recording mark whose light reflectance changes on a recording surface based on the intensity of the irradiated light is formed. An optical information recording method for recording information by receiving reflected light with respect to the irradiation light onto the recording medium, converting the reflected light into a light reception signal, and outputting light from the light source to each area where recording is performed before recording on the recording medium. Detecting the reproduction level of the light receiving signal when irradiating with a predetermined reproduction power,
The detected reproduction level of each area is held, and when recording on the recording medium, the recording mark level of the light receiving signal is detected during formation of the recording mark, and recording is performed with the recording mark level. It is preferable to control the recording power for the light source based on the reproduction level corresponding to the area in which the light source is located.

Further, in the optical information recording method as described above, it is preferable that the recording mark level is normalized by a recording power for the light source.

Also, the output light of the light source is split into a main light beam and a sub light beam, and modulated on the basis of predetermined information to irradiate a recording medium, and the recording surface is determined based on the intensity of the irradiation light of the main light beam. An optical information recording method for recording information according to whether or not to form a recording mark having a change in light reflectance, the method comprising: receiving reflected light with respect to irradiation light of the main light beam onto the recording medium; The recording mark level of the first light receiving signal is detected during the formation of the recording mark, and the reflected light corresponding to the irradiation light of the sub light beam on the recording medium is received. Preferably, the light receiving signal is converted to a light receiving signal, a sub beam level of the second light receiving signal is detected during formation of the recording mark, and recording power for the light source is controlled based on the recording mark level and the sub beam level.

Further, there is provided an optical information recording apparatus as described above or a recording medium used in the optical information recording apparatus, the recording medium including a recording layer made of a recording material on which a recording mark is formed in a heat mode. .

[0025]

Embodiments of the present invention will be specifically described below with reference to the drawings. FIG. 1 shows a first embodiment of the present invention.
FIG. 1 is a block diagram illustrating a configuration of an optical information recording device according to an embodiment. This optical information recording apparatus uses a semiconductor laser light source (LD) 1 as a light source and L based on recording data Sdata.
An LD controller 2 that modulates the recording power of D1 and controls the LD1 to output a laser beam at an optimum recording power based on the LD power control signal Spw; An optical pickup (PU) 3 for condensing and irradiating the recording medium 10 with a light, and receiving the reflected light from the recording medium 10 via the PU 3 and converting the irradiating light into a light receiving signal Srf. Unit 4.

The PU 3 is provided with an optical isolator constituted by a polarizing beam splitter (hereinafter referred to as PBS) 3 a and a quarter-wave plate 3 b, and a part of the reflected light from the recording medium 10 is transmitted to the light receiving unit 4. It is made to enter.
The other components such as an objective lens are well known in the art, so that illustration and description thereof are omitted. The first sample hold (S / H) unit 5 samples and holds the light receiving signal Srf from the light receiving unit 4 based on the sampling signal Ssmp1 input from the controller 7, detects the recording mark level Vm, and detects the detection mark Sm. Is output to the controller 7. In addition, a second sample hold (S / H) unit 6
Is the sampling signal S input from the controller 7
Based on smp2, the light receiving signal Srf from the light receiving unit 4 is sampled and held to detect the space level Vs, and the detected signal Ss is output to the controller 7.

The controller 7 outputs the sampling signal Ssmp1 to the first S / H unit 5 and the sampling signal Ssmp2 to the second S / H unit 6,
The optimum recording power is calculated based on the detection signal Sm from the H section 5 and the detection signal Ss from the second S / H section 6, and the LD power control signal Spw corresponding to the optimum recording power is set to L.
It includes a function of outputting to the D control unit 2, a function of normalizing the recording mark level Vm with the recording power, and the like.

That is, the optical information recording apparatus modulates the output light of the LD 1 as a light source on the basis of predetermined information and irradiates the recording medium 10 with the light. Is a device for recording information depending on whether or not to form a changeable recording mark, and the above-described units perform the following functions. The PU 3 and the light receiving unit 4 are the recording medium 1
It functions as a light receiving means for receiving the reflected light with respect to the light irradiated to 0 and converting it into a light receiving signal. The first S / H unit 5 and the controller 7 function as first detecting means for detecting the level of the light receiving signal at a predetermined timing during the formation of the recording mark.

The second S / H unit 6 and the controller 7
While the output light from the light source LD1 is being irradiated with the recording power that does not form a recording mark on the recording surface of the recording medium 10, it functions as a second detection unit that detects the level of the received light signal at a predetermined timing. LD controller 2 and controller 7
When modulating the output light of the LD 1 as a light source based on predetermined information, recording on the light source is performed based on the level detected by the first detecting means and the level detected by the second detecting means. It functions as light source control means for controlling power. In addition, the controller 7
Functions as a normalizing means for normalizing the level detected by the first detecting means with the recording power of the light source.

The optical information recording apparatus modulates the output light of the light source based on predetermined information and irradiates the modulated light on a recording medium.
Information is recorded depending on whether or not a recording mark whose light reflectivity changes on the recording surface based on the intensity of the irradiating light is received, and the reflected light corresponding to the irradiating light on the recording medium is received and converted into a light receiving signal. Detecting the recording mark level of the received light signal during the formation of the recording mark, detecting the variation and variation of the received light signal with respect to the recording medium, correcting the recording mark level based on the variation and variation of the received light signal, The recording power for the light source is controlled based on the corrected recording mark level.

The light reflected from the recording medium 10 is reflected and converted into a light reception signal. During formation of a recording mark, the recording mark level of the light reception signal is detected, and the light source L is detected.
It is preferable to detect the space level of the received light signal while irradiating D1 with a recording power that does not form a recording mark, and control the recording power for the light source based on the recording mark level and the space level. Further, the recording mark level may be normalized by the recording power for the light source.

Although not shown in the drawings, the optical information recording apparatus naturally includes a servo mechanism for controlling the light spot irradiating the recording medium 10 to irradiate an arbitrary position. These may be performed using a conventionally well-known technique, and are not directly related to the main gist of this embodiment, and thus detailed description is omitted.

Next, the control of the optical information recording apparatus to the optimum recording power by the first sample hold unit 5, the second sample hold unit 6, and the controller 7 will be described. FIG. 2 is a waveform diagram of the light receiving signal Srf during the recording operation. In FIG. 2A, (i) is a period during which the LD 1 is irradiating with the recording power Pw, and (ii) is a period during which the LD 1 is irradiating with the recording power Ps at which a recording mark is not formed.
Since the recording medium 10 assumed in the optical information recording apparatus of the first embodiment has a characteristic that the reflectance decreases when a recording mark is formed, the light receiving signal varies depending on the recording mark formation state in the period (i). It decreases as shown in FIG.

The first sample hold unit 5 detects a recording mark level Vm, which is a level of a light receiving signal after a predetermined time T from the start of recording power irradiation. The recording mark level Vm varies depending on the recording mark formation state. That is, when recording is performed on the recording medium 10 with a recording power higher than the optimum recording power, a mark larger than the ideal state is formed on the recording mark. The mark level Vm also decreases. Conversely, when recording is performed with a recording power that is lower than the optimum recording power, the recording mark level Vm increases.

Factors that deviate from the optimum power include a case where the recording power Pw itself deviates from the optimum recording power, a case where the optimum recording power is not constant in the plane due to a variation in the recording sensitivity of the recording medium 10, and a case where the recording medium 10 There is a case where the laser beam irradiated on the recording medium 10 is distorted due to a tilt or a shift (defocus) of the light spot from the focal position, and the power effective for forming the recording mark is insufficient. The second sample-and-hold unit 6 samples the light receiving signal during the period (ii) during irradiation with the recording power Ps at which the recording mark is not formed,
The space level Vs is detected. This space level V
s does not depend on the recording mark formation state.

By the way, as described above, the reflected light from the recording medium whose birefringence characteristic varies depending on the position in the plane is
When light is received via an optical pickup using an optical isolator, the return path efficiency changes and the light receiving signal Srf fluctuates.
FIG. 2B is a waveform diagram of the light receiving signal Srf during the recording operation in such an area (for example, the arrow (b) in FIG. 11). As in (a) of the figure, (i) is a period during which the LD irradiates with the recording power Pw, and (ii) is a period during which the LD irradiates with the recording power Ps at which no mark is formed. The recording medium 10 has the same recording power Pw as in FIG.
And Ps.

In this area, the return path efficiency changes, so that even if the reflected light from the recording medium 10 is equal as shown in FIG. 3A, the received light signal fluctuates as shown in FIG. If it decreases, the detected recording mark level V
m ′ and the space level Vs ′ also fluctuate. Here, the fluctuation of each level is caused by the fluctuation of the return path efficiency and occurs at the same ratio. If this fluctuation component is α, the recording mark level Vm ′ and the space level Vs ′ are expressed as the following equation 1. Can be.

[0038]

Vm ′ = α · Vm Vs ′ = α · Vs Vm ′ / Vs ′ = Vm / Vs

That is, the ratio Vm / Vs of each level does not depend on the return path efficiency. Therefore, the recording mark level V corresponding to the optimum recording power obtained in advance by trial writing or the like is obtained.
m0 and the space level Vs0 are determined, and the ratio Vm0 / Vs0 of the two levels is set as a control target value during the recording operation, and the ratio Vm between the recording mark level Vm and the space level Vs during recording is determined.
By controlling the recording power so that / Vs coincides, it is possible to always maintain the optimum recording power even when various fluctuations occur during recording. Further, since the fluctuation component of the recording mark level Vm due to the recording power Pw is corrected, if the recording power is normalized by the recording power Pw, the optimum recording power control can be performed more accurately.

Further, the optimum recording power can be obtained by trial writing as follows. A test writing pattern is recorded in a predetermined test writing area while sequentially changing the recording power. After the test writing, the recording power at which the symmetry (asymmetry) of the reproduction signal with respect to the long mark of the short mark is determined as the optimum recording power. I get it. At the time of test writing, the correspondence between the recording power and the detected recording mark level and space level is held, and if the optimum recording power is obtained, the ratio between the corresponding recording mark level and space level is set to the control target value Vm0. / Vs0.

According to the optical information recording apparatus of the first embodiment, even when the light receiving signal fluctuates due to the change of the return path efficiency due to the in-plane variation of the birefringence characteristic, the recording is performed without erroneous control. Recording can be performed while maintaining the optimum recording power even when various fluctuations such as output fluctuation of the light source, defocus, tilt, and sensitivity variation of the recording medium occur during the recording.

Further, the level of the received light signal during the formation of the recording mark is detected as the recording mark level, and the level of the received light signal during the irradiation with the power at which the light source does not form the recording mark is detected as the space level. Since the output power of the light source is controlled according to the level, the return path efficiency changes due to the in-plane variation of the birefringence characteristics, etc. Even if various fluctuations such as fluctuations in the output of the light source, defocus and tilt, and variations in the sensitivity of the recording medium occur, recording can be performed while maintaining the optimum recording power. Further, since the recording mark level is normalized by the recording power of the light source, it is possible to correct the fluctuation component of the recording mark level due to the recording power, and to perform the optimum recording power control with higher accuracy.

Next, a second embodiment of the present invention will be described. FIG. 3 is a block diagram showing the configuration of the optical information recording apparatus according to the second embodiment of the present invention. The same reference numerals are given to the parts common to FIG. 1 and the description is omitted. This second
In the optical information recording apparatus according to the embodiment, the first S / H section 5 and the second S / H section 6 of the optical information recording apparatus according to the first embodiment are replaced with one sample / hold (S / H) section 9, and The / H unit 9 detects the recording mark level Vm and the space level Vs based on the sampling signal Ssmp from the controller 7, and outputs the respective detection signals Sd to the controller 7. FIG. 4 shows the sampling signal S of the controller 7.
It is a waveform diagram which shows the timing of sm.

That is, the S / H unit 9 adjusts the first level of the received light signal at a predetermined timing during the formation of the recording mark while irradiating the output light from the light source with the recording power that does not form the recording mark on the recording surface. It functions as a detecting means for detecting the second level of the light receiving signal at a predetermined timing. With this configuration, since only one S / H unit is required, the device configuration can be simplified, and the cost during device manufacturing can be reduced.

Next, a third embodiment of the present invention will be described. FIG. 5 is a block diagram showing a configuration of an optical information recording apparatus according to a third embodiment of the present invention. In FIG. This third
In the optical information recording device of the embodiment, the reproduction level detecting unit 2 is used instead of the second S / H unit 6 of the optical information recording device of the first embodiment.
0 and the holding unit 21 are provided. Reproduction level detector 20
Is configured by a circuit such as an A / D converter, detects the level Vr of the light receiving signal Srf during reproduction, and inputs the detection signal Sr to the holding unit 21.

The holding unit 21 holds the value of the detected level Vr based on the detection signal Sr in association with the area n from the area instruction signal Sn input from the controller 22. And outputs the level Vr corresponding to the region n to the controller 22 as the detection signal Sr (n) based on the read signal Sn. The controller 22 calculates the optimum recording power based on the detection signals Sm and Sr (n), and outputs the corresponding LD power control signal Spw to the LD controller 2.

That is, the reproduction level detecting section 20
It functions as a second detecting means for detecting the level of the light receiving signal while irradiating the recording surface with the output light from the light source at a predetermined reproducing power. The holding unit 21 is used for the recording medium 10
Is held in association with the level detected by the second detection means for each area divided into a plurality of areas, and performs the function of a level holding means for outputting the level corresponding to the recording area during recording. LD control unit 2 and controller 22
Controlling the recording power for the light source based on the level detected by the first detection unit and the level output from the level holding unit when modulating the output light of the light source based on predetermined information. It fulfills the function of light source control means. Further, the controller 22 functions as a normalizing means for normalizing the level detected by the first detecting means with the recording power of the light source.

The optical information recording apparatus modulates the output light of the light source based on predetermined information and irradiates the modulated light with a recording medium.
Information is recorded depending on whether or not a recording mark whose light reflectance changes on the recording surface based on the intensity of the irradiating light is received, and the reflected light corresponding to the irradiating light to the recording medium is received to form a light receiving signal. Convert and detect the reproduction level of the received light signal when the output light from the light source is irradiated at a predetermined reproduction power to each area where recording is performed before recording on the recording medium, and hold the detected reproduction level for each area. During recording on the recording medium, the recording mark level of the received light signal is detected during the formation of the recording mark, and the recording power for the light source is determined based on the recording mark level and the reproduction level corresponding to the recording area. Control. The recording mark level may be normalized by the recording power for the light source.

The level Vr at the time of reproduction is determined by the recording medium 10
If the recording power applied to the recording medium is constant, the recording medium 1
The value corresponds to the reflectance of 0 and the return path efficiency. That is, the recording mark level Vm during recording and the level Vr at the time of reproduction of the recorded area n are similarly affected by the return path efficiency, and the ratio Vm / Vr does not depend on the return path efficiency. Therefore, before test writing and recording, the reproduction level Vr0 of the test writing area and the recording area are divided into a plurality of areas, and the reproduction level Vr (n) of each area n is detected and held.
At the time of recording, Vm0 / Vr0 is set as a control target value,
If the recording power is controlled so that / Vr (n) coincides, it is possible to always maintain the optimum recording power even when various fluctuations occur during recording.

According to the optical information recording apparatus of the third embodiment, the second detecting means can be constituted without using a high-speed sample and hold circuit or the like. The same effect can be obtained. Further, the band of the second light receiving signal may be low.

Next, a fourth embodiment of the present invention will be described. FIG. 6 is a block diagram showing a configuration of an optical information recording apparatus according to a fourth embodiment of the present invention. The same reference numerals as in FIG. 1 denote the same parts, and a description thereof will be omitted. This fourth
In the optical information recording apparatus of the embodiment, the first S / H section 5 and the second S / H section 6 of the optical information recording apparatus of the first embodiment are replaced with one sample / hold (S / H) section 23, A digital conversion unit (A / D) 24 and a holding unit 21 are provided, and the processing of the controller 22 is slightly different from that described above.

The S / H section 23 detects the recording mark level Vm and the space level Vs based on the sampling signal Ssmp from the controller 22, sends the respective detection signals Sm to the A / D 24, and converts the digitally converted recording mark level. Vm is sent to the controller 22. On the other hand, the detection signal Sr obtained by digitally converting the level Vr of the light receiving signal Srf at the time of reproduction is input to the holding unit 21 and held, and during the recording operation, the level Vr corresponding to the area n is determined based on the read signal Sn from the controller 22. To the controller 22 as the detection signal Sr (n). The controller 22 calculates the optimum recording power based on the detection signals Sm and Sr (n), and sets the corresponding LD power control signal Spw to L.
Output to D control unit 2. Controller 2 at this time
The timing of the sampling signal Ssmp of No. 2 is the timing described for the sampling signal Ssmp1 of FIG. 2 during recording, and the sampling operation is always performed during reproduction.

That is, the S / H unit 23 and A / D2
4 is a detection method for detecting a first level of a light reception signal at a predetermined timing during formation of a recording mark, and detecting a second level of the light reception signal during irradiation of output light from a light source on a recording surface with a predetermined reproduction power. Acts as a means. With this configuration, since only one detection unit is required, the device configuration can be simplified, and the cost during device manufacturing can be reduced.

Next, for example, in an optical disk apparatus, a recording medium is irradiated with a plurality of beams, and a differential push-pull method is given as an example. As is well known, the differential push-pull method uses three light beams to irradiate an optical disk, and a pair of sub-beam spots on the optical disk with respect to a main beam spot in the disk radial direction by (N + 1/2) · Tp (N Is an integer, T
(p is the track pitch), and the push-pull signal is detected for each of the main and sub spots.
These differential signals are taken to detect a track error signal.

According to this differential push-pull method, both the push-pull signal of the main beam and the push-pull signal of the sub-beam have optical axis deviation (displacement of the objective lens in the disk radial direction) and tilt (tilt with respect to the irradiation beam of the optical disk). ), The differential push-pull signal, which is the difference signal between them, has the advantage of canceling the DC offset, and is widely used.

Next, a fifth embodiment of the present invention utilizing the above-described differential push-pull method will be described. FIG. 7 is a block diagram showing a configuration of an optical information recording apparatus according to a fifth embodiment of the present invention. The same parts as those in FIG. FIG. 8 is a block diagram showing an internal configuration of the light receiving section 30 shown in FIG. FIG.
As shown in FIG. 3, the light receiving unit 30 receives the reflected lights of the three beams from the recording medium 10 via the PU 3, and receives a light receiving signal Srf and a sub light beam (sub beam) corresponding to the amount of received main light beam (main beam). ) Is converted into a sub-beam light receiving signal Srf2 corresponding to the light receiving amount.

As shown in FIG. 8, the light receiving section 30 has three divided light receiving sections 31 to 33 for receiving a main beam and a pair of sub beams. Each of the divided light receiving units 31 to 33 is divided into a plurality of parts, and a servo error signal is generated by calculating the output of each of the divided elements. However, since this is not related to the gist of the present invention, the illustration of the arithmetic circuit and the Description is omitted. The light receiving signal generation unit 34 generates the light receiving signal Srf by adding the outputs of the respective divided elements of the divided light receiving unit 31 that receives the main beam. In addition, the light receiving signal generation unit 35 generates the sub beam light receiving signal Srf2 by adding the outputs of the divided elements of the divided light receiving unit 32 that receives one of the sub beams.

The recording medium 10 assumed in the fifth embodiment is a write-once recording medium such as a CD-R disc, and one sub-beam is used for recording unrecorded tracks during recording.
The other sub-beams respectively irradiate unrecorded tracks. The sub beam received by the divided light receiving unit 32 is a sub beam irradiated to the unrecorded track side. Also, the first
The sample hold (S / H) unit 40 and the second sample hold (S / H) unit 41 sample and hold the light receiving signals Srf and Srf2 based on the sampling signal Ssmp1 input from the controller 42, respectively.
It detects the recording mark level Vm and the sub beam level Vsub, and inputs the detection signals Sm and Ssub to the controller 42. The controller 42 calculates the optimum recording power based on the detection signals Sm and Ssub, and outputs the corresponding LD power control signal Spw to the LD.
Output to the control unit 2.

That is, this optical information recording apparatus splits the output light of the LD 1 as a light source into a main light beam and a sub light beam, modulates the light based on predetermined information, and irradiates the recording medium with the main light beam. Is a device for recording information depending on whether or not to form a recording mark whose light reflectance changes on the recording surface based on the intensity of the irradiation light of the above. The divided light receiving unit 31 and the light receiving signal generating unit 34
It functions as a first light receiving unit that receives reflected light of the main light beam irradiated on the recording medium 10 and converts the reflected light into a first light reception signal. The divided light receiving section 32 and the light receiving signal generating section 35
Functions as a second light receiving unit that receives reflected light with respect to the irradiation light of the sub light beam onto the recording medium 10 and converts the reflected light into a second light receiving signal.

The first S / H section 40 functions as a first detecting means for detecting the level of the first light receiving signal at a predetermined timing during the formation of the recording mark. The second
The S / H unit 41 functions as a second detecting unit that detects the level of the second light receiving signal at the predetermined timing. When the LD control unit 2 and the controller 42 modulate the output light of the light source based on predetermined information, the LD control unit 2 and the controller 42 change the level detected by the first detection unit and the level detected by the second detection unit. On the basis of this, it functions as a light source control means for controlling the recording power for the light source. The divided light receiving section 32 and the light receiving signal generating section 35
May be a means for receiving reflected light of a sub-light beam irradiating an unrecorded area of the recording medium 10 and converting the reflected light into a second light-receiving signal.

This optical information recording apparatus splits the output light of the light source into a main light beam and a sub light beam, modulates the light based on predetermined information, and irradiates the recording medium with the light. Information is recorded in accordance with whether or not a recording mark whose light reflectance changes on the recording surface based on the strength of the light is received, and the reflected light with respect to the irradiation light of the main light beam on the recording medium is received. During the formation of the recording mark, the recording mark level of the first light receiving signal is detected, and the reflected light corresponding to the irradiation light of the sub-light beam on the recording medium is received and converted into the second light receiving signal. After the conversion, the sub beam level of the second light receiving signal is detected during the formation of the recording mark, and the recording power for the light source is controlled based on the recording mark level and the sub beam level.

The ratio (spectral ratio) between the irradiation light amount of the main beam and the irradiation light amount of the sub beam is constant, and the light reflected from the recording medium 10 is received by the light receiving section 30 via the same path. Therefore, the return path efficiency is similarly changed due to birefringence, and the recording mark level Vm and the sub-beam level Vsu
b also varies. FIG. 9 shows the light receiving signal S during the recording operation.
It is a wave form diagram of rf and Srf2. (I) and (i) in FIG.
i) shows the period during which the LD irradiates with the recording power Pw and the recording power Ps at which no mark is formed, as in FIG.
Is the irradiation period.

The light receiving signal Srf decreases as shown in the figure depending on the recording mark formation state as described above. On the other hand, the irradiation light amount of the sub-beam is a power at which the recording mark is not formed even during the recording power irradiation period (i). , During that period is at a constant level. The first sample hold unit 40 and the second sample hold unit 41 respectively receive the light receiving signals Srf and Srf2 after a predetermined time T from the start of the recording power irradiation.
Are to detect the respective levels Vm and Vsub. (B) of the figure shows each signal waveform when the return path efficiency fluctuates due to a change in birefringence or the like. Since the main beam and sub-beam irradiation positions are located immediately adjacent to each other, there is almost no difference in birefringence characteristics. , The return-path efficiency variation is the same.

Therefore, the recording mark level Vm0 corresponding to the optimum recording power obtained in advance by trial writing or the like.
And the sub-beam level Vsub0, and the recording power is controlled such that the ratio Vm0 / Vsub0 is the control target value during the recording operation so that the ratio Vm / Vsub between the recording mark level Vm and the sub-beam level Vsub during recording matches. This makes it possible to always maintain the optimum recording power even when there are various fluctuations during recording. Also, since each level can be sampled at the same timing, Vm / Vsub can be detected with high accuracy, and the generation of a sample signal can be simplified.

Further, since the main and sub spectral ratios are constant, the respective levels change at the same ratio with respect to the change of the recording power Pw, so that it is possible to control with high accuracy without normalization by the recording power Pw. it can. When the recording data is a signal having no DC component (so-called DC-free) such as a CD-R or DVD-R, a DC component detection circuit such as a low-pass filter (LPF) is used instead of the second sample-and-hold unit 41. And the sub-beam light receiving signal Sr
A similar effect can be obtained by detecting the DC component Vsub (dc) of f2 and outputting this as the detection signal Ssub.

In this case, the LPF functions as a second detecting means for detecting the DC component of the second light receiving signal, and the LD controller 2 and the controller 42 determine the output light of the light source based on predetermined information. When performing modulation, the light source control section controls the recording power for the light source based on the level detected by the first detection section and the DC component detected by the LPF. With this configuration, it is not necessary to provide a high-speed sample and hold unit, so that the circuit can be simplified, and the band of the sub-beam light receiving signal Srf2 may be low.

According to the optical information recording apparatus of the fifth embodiment, the level of the light receiving signal of the main light beam during the formation of the recording mark is the same as the level of the light receiving signal of the sub light beam which is similarly affected by the return path efficiency. , The detection can be performed with high accuracy, and the generation of the sample signal can be simplified. Further, since the main / sub spectral ratio is constant, each level changes at the same ratio with respect to the change of the recording power, so that the control can be performed with high accuracy without normalization by the recording power. Further, since the detection can be performed irrespective of the reflectance of the recorded area, accurate control can be performed.

As shown in FIG. 10, the first S / H section 40 and the second S / H section 4 of the optical information recording apparatus according to the fifth embodiment.
By replacing 1 with a division unit 43 and a sample hold (S / H) unit 44 that perform equivalent functions, the processing load on the controller 45 can be reduced.

Next, a description will be given of a recording medium with which the effects of the optical information recording device of each of the above embodiments can be obtained favorably. First, the recording layer is recorded by causing an optical change due to thermal decomposition due to laser beam irradiation and accompanying substrate deformation, and forming a mark based on the change. When recording is performed on a recording medium on which a mark is formed in such a heat mode, the change in the amount of reflected light during recording is very high, that is, an area (recording mark) having a different reflectivity immediately after the laser beam irradiation. Is formed, the recording mark level V
m can be detected with high sensitivity, and is well suited for controlling the recording power in the optical information recording apparatus of each of the above embodiments.

Typically, organic dyes are used, and examples thereof include polymethine dyes, naphthalocyanine, phthalocyanine, squarylium, croconium, pyrylium, naphthoquinone, anthraquinone (indanthrene), and xanthene. Dyes, triphenylmethane-based, azulene-based, tetrahydrocholine-based, phenanthrene-based, triphenothiazine-based dyes and metal complex compounds. These dyes may be mixed or laminated with other organic dyes, metals, and metal compounds for the purpose of improving optical characteristics, recording sensitivity, signal characteristics, and the like. Examples of metals and metal compounds include In, Te, Bi,
Se, Sb, Ge, Sn, Al, Be, TeO2, Sn
O, As, Cd and the like can be mentioned, and each of them can be used in the form of dispersion mixing or lamination.

The recording layer can be formed by ordinary means such as vapor deposition, sputtering, CVD, or solvent application. On the other hand, when the coating method is used, the above dye or the like can be dissolved in an organic solvent, and the coating can be performed by a conventional coating method such as spraying, roller coating, dipping and spin coating.

In other recording materials on which marks are formed in the heat mode, the change in the amount of reflected light during recording basically shows the same tendency, so that it is used in each optical information recording apparatus of this embodiment. Needless to say, this is effective. According to the recording medium of this embodiment, the sensitivity of the change in the amount of reflected light during the formation of a recording mark is high, and the recording medium can be suitably adapted to the optical information recording apparatus of the embodiment of the present invention.

[0073]

As described above, according to the optical information recording apparatus, the optical information recording method and the recording medium used in the present invention, the return path efficiency varies according to the position of the recording medium due to the influence of birefringence and the like. In such cases, even if the received light amount fluctuates due to variations in reflectance, the state of formation of a recording mark during recording is accurately detected, and LD power fluctuation, tilt, defocus, media Information can be recorded while correcting and controlling the deviation of the optimum recording power due to a variation in sensitivity or the like.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an optical information recording device according to a first embodiment of the present invention.

FIG. 2 is a waveform diagram of a light receiving signal Srf during a recording operation in the optical information recording device of the first embodiment shown in FIG.

FIG. 3 is a block diagram illustrating a configuration of an optical information recording device according to a second embodiment of the present invention.

FIG. 4 is a waveform diagram showing a timing of a sampling signal Ssmp of a controller 7 according to the second embodiment of the present invention shown in FIG.

FIG. 5 is a block diagram showing a configuration of an optical information recording device according to a third embodiment of the present invention.

FIG. 6 is a block diagram showing a configuration of an optical information recording device according to a fourth embodiment of the present invention.

FIG. 7 is a block diagram illustrating a configuration of an optical information recording device according to a fifth embodiment of the present invention.

FIG. 8 is a block diagram showing an internal configuration of the light receiving unit 30 shown in FIG.

FIG. 9 is a waveform diagram of the light receiving signals Srf and Srf2 during the recording operation of the optical information recording apparatus according to the fifth embodiment of the present invention shown in FIG.

FIG. 10 is a block diagram showing a configuration of an optical information recording device according to still another embodiment of the present invention.

FIG. 11 is a diagram for explaining a change in return trip efficiency in the related art.

[Explanation of symbols]

 1: LD 2: LD control unit 3: PU 3a: polarization beam splitter 3b: quarter-wave plate 4, 30: light receiving unit 5, 40: first S / H unit 6, 41: second S / H unit 7, 22 , 42, 45: controller 9, 23, 44: S / H section 10: recording medium 20: reproduction level detection section 21: holding section 24: A / D 31-33: divided light receiving section 34, 35: light receiving signal generating section 43: Division unit

Claims (15)

[Claims] 1. A method of modulating output light from a light source based on predetermined information and irradiating the modulated light onto a recording medium, and determining whether to form a recording mark whose light reflectance changes on a recording surface based on the intensity of the irradiated light. An optical information recording apparatus that records information by using a light receiving unit that receives reflected light with respect to the irradiation light onto the recording medium and converts the reflected light into a light reception signal; and a level of the light reception signal at a predetermined timing during formation of the recording mark. First detecting means for detecting the level of the light receiving signal at a predetermined timing while irradiating the output light from the light source with a recording power that does not form a recording mark on the recording surface; and When modulating the output light of the light source based on predetermined information,
An optical information recording device comprising: light source control means for controlling recording power for the light source based on a level detected by the first detection means and a level detected by the second detection means. apparatus. 2. A method of modulating output light of a light source based on predetermined information and irradiating the modulated light on a recording medium, and determining whether or not to form a recording mark whose light reflectance changes on a recording surface based on the intensity of the irradiated light. An optical information recording apparatus that records information by using a light receiving unit that receives reflected light with respect to the irradiation light onto the recording medium and converts the reflected light into a light reception signal; and a level of the light reception signal at a predetermined timing during formation of the recording mark. First detecting means for detecting the level of the received light signal while irradiating the recording surface with the output light from the light source at a predetermined reproducing power; and detecting the recording medium in a plurality of areas. Level holding means for associating and holding the level detected by the second detection means for each area divided into sections, and outputting a level corresponding to the recording area at the time of recording; When modulation on the basis of,
An optical information recording apparatus, comprising: light source control means for controlling recording power for the light source based on the level detected by the first detection means and the level output from the level holding means. 3. The optical information recording apparatus according to claim 1, further comprising a normalizing means for normalizing a level detected by said first detecting means with a recording power of said light source. Optical information recording device. 4. A method for modulating output light of a light source based on predetermined information and irradiating the modulated light on a recording medium, and forming a recording mark whose light reflectance changes on a recording surface based on the intensity of the irradiated light. An optical information recording device that records information by receiving light reflected by the irradiation light onto the recording medium and converting the reflected light into a light reception signal; and Detecting means for detecting a second level of the light receiving signal at a predetermined timing while irradiating the output light from the light source with a recording power that does not form a recording mark on the recording surface; and an output light from the light source. When modulating based on predetermined information,
An optical information recording apparatus, comprising: light source control means for controlling recording power for the light source based on the first level and the second level detected by the detection means. 5. A method for modulating output light from a light source based on predetermined information and irradiating the modulated light on a recording medium, and forming a recording mark whose light reflectance changes on a recording surface based on the intensity of the irradiated light. An optical information recording device that records information by receiving light reflected by the irradiation light onto the recording medium and converting the reflected light into a light reception signal; and Detecting means for detecting a second level of the light receiving signal while irradiating the recording surface with the output light from the light source at a predetermined reproduction power; and an area obtained by dividing the recording medium into a plurality of areas. A second level holding unit that holds a second level detected by the detection unit in association with each other, and outputs a second level corresponding to a recording area at the time of recording; When modulation on the basis of,
Light source control means for controlling the recording power for the light source based on the first level detected by the detection means and the second level output from the second level holding means. Optical information recording device. 6. The optical information recording apparatus according to claim 4, further comprising a normalizing means for normalizing a first level detected by said detecting means with a recording power of said light source. Optical information recording device. 7. An output light of a light source is split into a main light beam and a sub light beam, and is modulated based on predetermined information to irradiate a recording medium, and a recording surface is determined based on the intensity of the irradiation light of the main light beam. An optical information recording apparatus for recording information by forming a recording mark whose light reflectance changes in the optical recording medium, comprising: a first light receiving unit that receives reflected light with respect to the irradiation of the main light beam onto the recording medium; A first light receiving unit for converting the signal into a signal, a second light receiving unit for receiving a reflected light with respect to the irradiation light of the sub light beam onto the recording medium and converting the reflected light into a second light receiving signal, and forming the recording mark. First detecting means for detecting the level of the first light receiving signal at a predetermined timing therein; second detecting means for detecting the level of the second light receiving signal at the predetermined timing; output light of the light source Is changed based on the specified information. When you,
An optical information recording device comprising: light source control means for controlling recording power for the light source based on a level detected by the first detection means and a level detected by the second detection means. apparatus. 8. An output light from a light source is split into a main light beam and a sub light beam, and is modulated based on predetermined information to irradiate a recording medium, and a recording surface is determined based on the intensity of the irradiation light of the main light beam. An optical information recording apparatus for recording information by forming a recording mark whose light reflectance changes in the optical recording medium, comprising: a first light receiving unit that receives reflected light with respect to the irradiation of the main light beam onto the recording medium; A first light receiving unit for converting the signal into a signal, a second light receiving unit for receiving a reflected light with respect to the irradiation light of the sub light beam onto the recording medium and converting the reflected light into a second light receiving signal, and forming the recording mark. A first detection unit that detects a level of the first light reception signal at a predetermined timing, a second detection unit that detects a DC component of the second light reception signal, and outputs the output light of the light source to predetermined information. When modulating based on
Optical information comprising: light source control means for controlling recording power for the light source based on a level detected by the first detection means and a DC component detected by the second detection means. Recording device. 9. The optical information recording apparatus according to claim 7, wherein the second light receiving means receives reflected light of a sub-light beam irradiating an unrecorded area of the recording medium, and receives the second light. An optical information recording device, characterized in that the optical information recording device converts the received light signal into a light receiving signal. 10. A method for modulating output light from a light source based on predetermined information and irradiating the modulated light on a recording medium, and forming a recording mark whose light reflectance changes on a recording surface based on the intensity of the irradiated light. An optical information recording method of recording information by receiving reflected light with respect to the irradiation light on the recording medium, converting the reflected light into a light receiving signal, detecting a recording mark level of the light receiving signal during formation of the recording mark, Detecting a variation and variation of the light receiving signal with respect to the recording medium, correcting the recording mark level based on the variation and variation of the light receiving signal, and determining a recording power for the light source based on the corrected recording mark level. An optical information recording method, comprising: 11. A method for modulating output light from a light source based on predetermined information and irradiating the modulated light on a recording medium, and forming a recording mark whose light reflectance changes on a recording surface based on the intensity of the irradiated light. An optical information recording method of recording information by receiving reflected light with respect to the irradiation light on the recording medium, converting the reflected light into a light receiving signal, detecting a recording mark level of the light receiving signal during formation of the recording mark, Detecting a space level of the light receiving signal while irradiating the light source with a recording power that does not form a recording mark, and controlling a recording power for the light source based on the recording mark level and the space level. Information recording method. 12. A method for modulating output light of a light source based on predetermined information and irradiating the modulated light on a recording medium, and forming a recording mark whose light reflectance changes on a recording surface based on the intensity of the irradiated light. An optical information recording method for recording information by receiving reflected light with respect to the irradiation light on the recording medium, converting the reflected light into a light reception signal, and outputting light from the light source to each area of the recording medium where recording is performed before recording. Is detected at a predetermined reproduction power, the reproduction level of the received light signal is detected, the detected reproduction level of each area is held, and when recording on the recording medium, during the formation of the recording mark, Detecting a recording mark level of the light receiving signal, and controlling a recording power for the light source based on the recording mark level and the reproduction level corresponding to a recording area. Recording method. 13. The optical information recording method according to claim 10, wherein the recording mark level is normalized by a recording power for the light source. 14. An output light from a light source is split into a main light beam and a sub light beam, and modulated based on predetermined information to irradiate a recording medium, and a recording surface is determined based on the intensity of the irradiation light of the main light beam. An optical information recording method for recording information according to whether or not to form a recording mark whose light reflectance changes, comprising: receiving reflected light with respect to irradiation light of the main light beam onto the recording medium; During the formation of the recording mark, detects the recording mark level of the first light receiving signal, receives the reflected light with respect to the irradiation light of the sub-light beam to the recording medium, the second Converting the received light signal into a received light signal, detecting a sub-beam level of the second received light signal during formation of the recording mark, and controlling a recording power for the light source based on the recording mark level and the sub-beam level. Optical information recording method. 15. A recording medium used for the optical information recording apparatus according to claim 1 or the optical information recording apparatus according to claim 10, wherein the recording medium is a heat medium. A recording medium comprising a recording layer made of a recording material on which a recording mark is formed by a mode.