JPS62256231A - Information recording medium disk and its recording device - Google Patents

Abstract

PURPOSE:To make the interval of recorded and formed traces constant, by providing an area which contains recorded trace patterns of prescribed intervals and address signals formed at every three recorded trace patterns and another area which indicates reference rotary phases at the inside of a recording area. CONSTITUTION:The disk D of this invention is constituted of a recording area RD which contains recorded traces by the 1st optical spot modulated in intensity by information signals and signals recorded by the non-modulated 2nd optical spot in land section, recorded area PGD at the inside of the recording area RD, and another recorded area SPD at the inside of the recorded area PGD. Recorded trace patterns of a state which holds prescribed intervals TP are formed in the area PGD and prescribed address signals Sa are respectively recorded in advance at every three recorded traces of the patterns in the vicinity of the specific radius X of the disk D. Moreover, signals SP indicating the reference rotary phase of the disk D are previously recorded in the area SPD. When such constitution is used, the recorded traces which are successively formed by the 1st optical spot are maintained at the regular intervals TP in accordance with the recorded traces of the area PGD.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to an information recording medium disc and a recording device thereof.

(Prior Art) As the demand for recording various information signals at high recording densities has increased, in recent years, information recording media created based on various structural and operating principles have been used to record information signals at high recording densities. It is well known that high-density recording and reproduction of information has become possible. For example, information signals are recorded by forming irregularities on the signal surface of an information recording medium according to the information signal, Recording and reproducing devices that reproduce signals by optical means or by detecting changes in capacitance are already in practical use for recording and reproducing video and audio signals, and In order to meet the demands for high-density recording and reproduction in various technical fields, by irradiating the recording layer of the information recording medium with a beam whose intensity is modulated by the information signal, the recording layer of the information recording medium can be made to respond to the information signal. Research has also begun on information recording media that record information signals by causing physical or chemical changes, but in recent years, it has become easier to obtain semiconductor lasers that operate stably. It is well known that various types of optical discs that use laser light for high-density recording and playback have already been put into practical use, or that research and development is currently underway to put them into practical use. That's right.

In other words, recorded optical discs (playback-only optical discs) that have been copied in large numbers from master discs on which information signals are recorded using bits formed as geometrical concave or convex parts are, for example, video discs, compact discs, etc. In addition, optical discs that can be added and recorded only once by the user (write-once optical discs) and erasable optical discs are being put into practical use for office file memory and other uses. Active research and development is being carried out for this purpose, and up until now, even write-once optical discs and erasable optical discs have had their recording layers exposed to various physical phenomena due to the heating action of the laser beam spot. When classified based on whether the information signal is recorded by a change in Various formats have been proposed, such as thermal transformation type (which causes changes in rate, etc.), as well as information recording media in which recording and reproducing operations are performed using energy outside the tip. Among the various types of information recording media mentioned above, information recording media that belong to the phase change type are:
It has attracted attention because of the possibility of erasing previously recorded information, and to date, phase-change information recording media have been made using chalcogenide-based materials (for example, as recording materials used in their recording layers). compositions consisting of various combinations of germanium, tellurium, antimony, silicon, arsenic, bismuth, indium, gallium, thallium, selenium, and sulfur), and those using lower oxides (for example, mixtures of Ta and TeO2, etc.) Research is progressing on various types of materials, such as those using , or alloys.

The various formats of information recording media mentioned above are -'/
- When the recording layer is irradiated with intensity-modulated light or other recording beam, the reflectance of light in the portion of the recording layer irradiated by the recording beam is the same as that of the portion not irradiated with the recording beam. Most of them are equipped with a recording layer that has a property that the reflectance of light is higher than the reflectance of light.

By the way, when reproducing information signals from an information recording medium on which information signals are recorded at high density, tracking control is used to ensure that the reproducing element or the reproducing beam always accurately follows the recording trace where the information signals are recorded. For example, a spot of light with a minute diameter is projected onto the signal surface of an information recording medium,
As a tracking error detection method used for tracking control in an optical information signal reproducing device that reproduces an information signal based on reflected light whose intensity is modulated by bits formed on the signal surface, The 1-racking error detection method using the so-called push-pull method detects the tracking error by utilizing the fact that the intensity distribution of the reflected light is biased due to the tracking error. In addition to being widely used because it is advantageous in terms of cost, it also projects a first light spot for signal reading onto the signal surface of an information recording medium. Second and third optical spots for tracking are projected onto symmetrical positions with the first optical spot as the center of symmetry on a straight line including the second optical spot. It is well known that a tracking error detection method that detects a tracking error based on the reflected light generated on the signal surface of the information recording medium by the third light spot has also been used. When reproducing information signals recorded at high density on various types of information recording media, the reproduction operation is normally performed under tracking control operation, and the information signals from the information recording medium are When the reproduction is performed optically, the tracking control operation is performed using a tracking control signal generated based on a tracking error signal detected by, for example, the various tracking error detection methods described above.

Now, a compact disc, which is known as an information recording medium in which information signals are recorded at high density by an arrangement of bits corresponding to the information signals on the signal surface of the information recording medium, has a size of 780 nm and 780 nm. Information signals are recorded on the signal surface by an array of bits with a depth set in a specific relationship to the wavelength of light, and the entire surface of the signal surface is covered with a thin film of aluminum. It is specified that the reflectance of the land portion on the signal surface is 70% to 90% for light with a wavelength of 780 nm, and the readout of information signals from the signal surface of an information recording medium is This is done using a spot of light with a wavelength of 780 nm.

When reading an information signal from the compact disc described above, the amount of light reflected from the bit portion on the signal surface of the compact disk is greater than the amount of reflected light from the land portion as a result of light interference occurring at the bit portion. Tracking error information is also obtained by using the difference between the amount of reflected light from the recorded trace area and the amount of reflected light from the land area. It is being done.

A compact disc has an information signal recorded on the signal surface of the information recording medium by the arrangement of bits according to the information signal, and an aluminum reflective film is coated on the entire surface of the signal surface. The reflectance of light is the highest in the part of the information signal, and the reflectance of light is the lowest in the part of the bit due to the information signal, and most of the write-once information recording media and erasable information recording media are When the recording layer is irradiated with intensity-modulated light or other recording beam, the light reflectance of the portion of the recording layer irradiated by the recording beam is the same as that of the portion not irradiated by the recording beam. As mentioned above, the compact disc, the write-once information recording medium, and the erasable information recording medium are equipped with a recording layer that has a property that increases the reflectance of light. For most information recording media, the light reflectance of the land portions of the media is the highest in the former, while it is the lowest in the latter, so they have an opposite relationship. There is.

Therefore, when reproducing most of the above-mentioned write-once information recording media and erasable recording media, it is not possible to use the commonly used compact 1 to disc reproducing apparatuses as they are.

In order to solve the above-mentioned problems, the applicant company first developed a method that, when the recording layer is irradiated with intensity-modulated light or other recording beam, the area of the recording layer irradiated by the recording beam is Generally speaking, it is a special method of recording on an information recording medium that has a recording layer that has a property that the reflectance of light is higher than the reflectance of light in the area that is not irradiated with the recording beam. An information signal recording method that can obtain a recorded information recording medium in a state in which the information signal can be reproduced by using a popular compact disc reproduction device as is, that is, an information signal recording method that can be used to reproduce information signals using a widely used compact disc reproduction device. A recording beam whose intensity is modulated by an information signal is used to form a recording trace of the information signal on the information recording medium, and also to form a recording trace of the information signal on the information recording medium between adjacent recording traces of the information signal. We also proposed a method for recording information signals by irradiating a recording beam in an unmodulated state.

(Problems to be Solved by the Invention) According to the previously proposed information signal recording method, it is possible to reproduce and register information signals by using a generally popular compact disc reproduction device as is. However, in order to record information signals at a high density on the information recording medium disk, it is necessary to use a transfer mechanism with extremely high mechanical precision when recording the information signal. Therefore, it is necessary to transport the recording element in the radial direction of the information recording medium disc, but a recording apparatus using such a transport mechanism is large and extremely expensive.

In order to solve the above-mentioned problems, the applicant company records an information signal on the recording layer of an information recording medium disk using a first light spot of a laser beam whose intensity is modulated according to the information signal to be recorded. At the same time, a second laser beam of unmodulated laser light is applied to land portions between adjacent recording traces of the information signal in the recording layer of the information recording medium disk. As an information recording medium disc on which an information signal is to be recorded by an information signal recording method in which a light spot is irradiated and an unmodulated signal is recorded thereon, the above-mentioned 1. In the outer part or the inner part adjacent to the recording area set to be recorded by the second light spot,
Using a pattern in which a plurality of record traces maintaining a predetermined accurate record trace interval is formed in advance by changing the geometric shape, the pattern is formed in advance by changing the geometric shape described above. A recording trace that is continuous with the recording trace pattern is recorded and formed by the first light spot of the laser light, and the second light spot of the laser light is formed by the first light of the laser light. The tracking error information is obtained from the light reflected from the recording layer of the information recording medium disk by the second light spot of the laser light. Then, the first laser beam. An information signal recording method has been proposed in which tracking control is performed on the second light spot, thereby making it possible to solve the above-mentioned problems.

However, when the information recording medium disc is configured to be removably attached to the recording device, the first
．． Geometrically, a predetermined accurate recording trace interval is maintained in the outer part or inner part adjacent to the recording area set on the information recording medium disc to be recorded by the second light spot. The positions of the plurality of record trace patterns provided as changes in shape do not necessarily always have a constant relative position with respect to the center position of the rotational drive shaft of the information recording medium disk in the recording device. The information recording medium disc is not necessarily attached to the recording device in this state.

In other words, the diameter of the center hole provided in the information recording medium disk is slightly larger than the diameter of the rotating shaft in order to allow the information recording medium disk to be attached to and freely move around the rotating shaft provided in the recording device. When the information recording medium disk is mounted on the rotating shaft of the recording device, it is inevitable that the information recording medium disk will be eccentric, and the center hole provided in the information recording medium disk itself This is because the position of each information recording medium disk has some deviation.

Due to the above-mentioned variations in the information recording medium disk and variations in mechanical accuracy of individual recording devices, the home position of the recording element in each recording device is different for all recording devices. When the recording apparatus is placed in a recording standby state due to reasons such as irregularity, the first . V! by the second light spot! As a change in the geometrical shape while maintaining a predetermined accurate recording trace interval in the outer part or inner part adjacent to the recording area set on the information recording medium disk where recording is to be performed. The spots of the first and second laser beams are not always projected onto specific positions of a plurality of record trace patterns provided in advance.

Therefore, even if there are variations due to the various causes mentioned above, when the recording element of the recording device is at the home position, the first . The second light spot is always projected onto the recording traces in the area where the plurality of recording trace patterns provided in advance on the information recording medium disc exist as described above. In order to do this, it is necessary that the area in which the above-mentioned recording traces are set has a width that can cover the variations due to the various causes mentioned above, for example, about 200 to 500 microns. be done.

However, in a high-density recording information recording@medium disk, many recording traces are formed in the area having 11 as described above, so V! The recording device is set to recording mode and the first laser beam is emitted. After the second light spot is projected onto any recording trace in the above-mentioned area, the first and second light spots of the laser light are projected onto the final trace in the above-mentioned area. A situation may occur in which it takes a considerable amount of time until the end of the recording trace is reached and the recording operation can actually be started.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention assigns addresses to recording traces in the above-mentioned areas, and when the recording device is in a recording standby state, Then, based on the address mentioned above, the first . The configuration of the recording device can be simplified by providing the information necessary to operate the recording device so that the second light spot can be kept on standby at the final recording trace in the aforementioned area. An information recording medium disk having a configuration in which information is recorded in advance on the recording medium disk, that is, a first laser beam whose intensity is modulated by the information signal to be recorded.
The light spot forms a recording trace of the information signal on the recording layer of the information recording medium disk, and also creates a gap between adjacent recording traces of the information signal on the recording layer of the information recording medium disk. The information signal is recorded by an information signal recording method in which an unmodulated laser beam is irradiated onto the second light spot on the land portion of the land, and an unmodulated signal is recorded there. A predetermined area is provided in the inner part of the information recording medium disc on which recording is to be performed, adjacent to the recording area where recording is to be performed by the aforementioned first and second light spots. A record trace pattern that maintains accurate record trace intervals is formed in advance by changing the geometric shape, and every third record trace in the record trace pattern has a specific mark on the information recording medium disc. A predetermined address signal is recorded in advance in the vicinity of each radius, and furthermore, in an area adjacent to the inner side of the area where the above-mentioned record trace pattern is recorded as a change in geometric shape, an area of the information recording medium disk is recorded in advance. An information recording medium disk on which a signal indicating a reference rotational phase is recorded in advance, and a recording device that records information signals on the information recording medium disk having the above configuration, that is, a recording device that is targeted for recording. The first light spot of the laser beam whose intensity is modulated by the information signal in the information recording medium disk forms a recording trace of the information signal on the recording layer of the information recording medium disk, and also causes the information signal to form in the recording layer of the information recording medium disk. An information signal in which a second light spot of an unmodulated laser beam is irradiated also onto a land portion between adjacent recording marks to record an unmodulated signal thereon. As an information recording medium disk on which information signals are to be recorded by the recording method described above, an information recording medium disk is provided in an inner portion adjacent to a recording area where recording is to be performed by the first and second light spots described above. A record trace pattern with a predetermined accurate record trace interval is formed in the area in advance by changing the geometric shape, and every third record trace in the record trace pattern has information. Predetermined address signals are recorded in advance in the vicinity of specific radii on the recording medium disc, and furthermore, 120 addresses adjacent to the inside of the area where the above-mentioned recording trace pattern is recorded as a change in geometric shape are recorded in advance. - By using a region in which a signal indicating the reference rotational phase of the information recording medium disk is recorded in advance, adjacent recording trace patterns formed in advance by changes in the geometrical shape of the information recording medium disk are used. a first signal detection means for detecting tracking error information from the light reflected by the second light spot of the laser light projected between the two recording traces; and a second signal detection means for detecting the address signal. , a photosensor for detecting a signal indicating a reference rotational phase of the information recording medium disc recorded on the information recording medium disc, an arithmetic and control circuit, a tracking control circuit, an optical system, and an actuator. In addition, when the recording apparatus is in the recording standby mode, the tracking control signal obtained based on the tracking error information detected by the first signal detection means causes the first laser beam to be detected. The first light spot of the laser beam and the second light spot of the laser beam are arranged so that the light spot is correctly positioned on the recording trace in the recording trace pattern previously formed by the change in the geometrical shape described above. based on information regarding the address signal detected by the second signal detection means to which the gate signal generated based on the output signal from the photosensor is supplied. a means for detecting an accurate address position of each record trace by using a means for detecting an accurate address position of each record; and a record in which a first light spot of the laser beam is formed in advance by changing the geometrical shape described above based on the detection result of the address position. When reaching near the final end of the recorded trace in the trace pattern, a kick pulse generated based on the output from the photo sensor described above is supplied to the actuator of the condensing lens, and the first light spot of the laser beam is means for displacing and driving the recording trace to a recording trace immediately before the last recording trace in the recording trace pattern previously formed by the change in the geometrical shape described above, and a state in which the recording device is in an information signal recording mode. In this step, the first light spot of the laser beam is projected onto the middle of two adjacent records in the record formed by the first light spot of the laser beam, following the record trace pattern previously formed by the change in the geometrical shape described above. The tracking control signal obtained based on the tracking error information detected by the first signal detecting means detects the tracking error information from the light reflected by the second light spot of the laser light. The present invention provides an information signal recording device comprising means for performing tracking control on a first light spot and a second light spot of a laser beam.

(Example) Hereinafter, detailed contents of the information recording medium disk and its recording device of the present invention will be specifically explained with reference to the accompanying drawings. FIG. 1 is a plan view of an example configuration of an information recording medium disk of the present invention, and FIG. 2 is an information recording medium illustrating the manner in which information signals are recorded on the information recording medium disk shown in FIG. 1. It is an enlarged plan view of a part of the disk, and the third
Figures 4 and 5 are side views of a part of the recording device used when recording information signals on the information recording medium disk of the present invention.
The figure is a side view showing an example of the configuration of an optical system unit used when recording information signals on the information recording medium disc of the present invention, and FIG. 6 is a block diagram of one embodiment of the recording apparatus of the present invention.

In the information recording medium disc of the present invention shown in the first diagram, an information signal is recorded on the recording layer of the information recording medium disc by a first light spot of a laser beam whose intensity is modulated by an information signal to be recorded. A second light spot of a laser beam in an unmodulated state that forms a trace and also applies to land portions between adjacent recording traces of recording traces caused by information signals in the recording layer of the information recording medium disk. A recording area RD is set to record an information signal using an information signal recording method in which an unmodulated signal is recorded thereon by irradiating the recording area RD.
The first recorded area P set in the inner part adjacent to
GD, and a second recorded area SPD set in an inner portion adjacent to the above-mentioned area PGD, and a predetermined accurate recording trace interval is maintained in the above-mentioned first recorded area POD. A record trace pattern of the state is formed in advance by a change in geometrical shape, and a predetermined address is placed in the vicinity of a specific radius of the information recording medium disk in every third record trace in the record trace pattern. A signal is also recorded in advance, and furthermore, a signal indicating the reference rotational phase of the information recording medium disk is recorded in advance in the second recorded area SPD.

Note that the x-X ray position in FIG. 1 corresponds to the recording start position of the address signal recorded in every third record trace recorded in the first recorded area PGD. This is a line that includes the radius of the information recording medium disk. Also, instead of setting the second recorded area SPD indicated by a dotted line in FIG. 1 to the part indicated by a solid line in FIG. This is to indicate that it may be set at any position.

FIG. 2 shows enlarged views of a part of the first recorded area PGD and a part of the second recorded area SPD shown in FIG. ,SP
2 is a diagram schematically showing the recording mode of information signals in FIG. 2, and the line XX in FIG. 2 corresponds to the line XX in FIG.

In FIG. 2, Sa is the first recorded area PG mentioned above.
The vicinity of a specific radius of the information recording medium disk in every third record trace in a record trace pattern that has been formed in advance by a change in geometric shape, with a predetermined accurate record trace interval maintained in D. , respectively, are predetermined address signals recorded in advance, and Sp is a signal indicating the reference rotational phase of the information recording medium disk, which is recorded in advance in the second recorded area SPD.

The address signal Sa to be recorded in every third recording trace in the first recorded area POD is, for example,
It is recorded as an address signal such that the address of the last recorded trace in the recorded area PGD is set to zero address. Second
In the figure, R is the rotation direction of the information recording medium disk, and Sl is the first light spot of the laser beam whose intensity is modulated by the information signal being recorded.
is a second light spot for land irradiation. Note that the hatched areas in FIG. 2 are areas with low light reflectance, and the white areas are areas with high light reflectance.

A plurality of recording traces are provided in advance in a first recorded area P G D set in an outer part or an inner part adjacent to the recording area RD on the information recording medium disk, with a predetermined accurate recording trace interval maintained. The record trace pattern of a book should be such that the recording layer of the information recording medium disk is cursed with a change in a predetermined geometric shape that has a lower light reflectance than the land portion. The above-mentioned change in the geometrical shape can be achieved, for example, by mechanically forming continuous spiral grooves on the substrate of the information recording medium disk, or by forming intermittent spiral grooves on the substrate of the information recording medium disk. What is necessary is just to mechanically construct the shaped groove.

In addition, as mentioned above, the reflectance of the light of the recording trace recorded in advance in the first recorded area PGD is the average of the recording trace recorded and formed in the area RD by the first light spot of the laser beam. It is a desirable embodiment to make the reflectance approximately equal to the light reflectance of .

The grooves as described above can also be formed on the substrate of the information recording medium disc by transferring the grooves onto the substrate using a stamper using means well known in the disk manufacturing technology.

Further, the signal Sp indicating the reference rotational phase of the information recording medium disc, which is recorded in advance in the second recorded area SPD of the information recording medium disc, can be obtained as long as the information at the time of the start of the signal is obtained. , the length may be any suitable length as long as it does not cover one circumference of the information recording medium disk, and the reference rotation of the information recording medium disk is recorded in advance in the second recorded area SPD of the information recording medium disk. The signal Sp indicating the phase is also
As in the case of forming the recording trace pattern in the first recorded area PGD described above, for example, grooves of a predetermined shape may be mechanically formed on the substrate of the information recording medium disc.
In order to form the grooves as described above on the substrate of the information recording medium disk, means known in the disk manufacturing technology can be applied, and the grooves can be transferred onto the substrate using a stamper 28-.

Here, the first. How each signal pre-recorded in each second recorded area' is used for the recording operation when recording the information signal on the information recording medium disk. Explain the outline.

The information recording medium disc having the above-mentioned configuration uses the first light spot of the laser beam whose intensity is modulated by the information signal to be recorded in the recording area RD of the information recording medium disc. information signal in the recording layer′
A second beam of laser light in an unmodulated state is used to form a recording trace and also to land portions between adjacent recording traces caused by information signals in the recording layer of the information recording medium disc. Information signals are recorded using an information signal recording method in which a spot is irradiated and an unmodulated signal is recorded there. During the recording standby mode prior to the start of
The first recorded area P GD of the laser beam projected onto the first recorded area PG D provided in the inner part adjacent to PG D. The first light spot among the second light spots is moved to the first recorded area PGD by the operation of the tracking control system while maintaining a predetermined accurate recording trace interval by changing the geometrical shape. The recording traces in the recording trace pattern recorded in advance are correctly traced, and the second optical spoiler I- of the laser beam is directed to the first recorded area PGD by the operation of the tracking control system. By changing the geometric shape, the land between two traces in a prerecorded trace pattern is correctly traced while maintaining a predetermined accurate trace interval.

Then, as described above, the spot of the second light of the laser beam projected onto the land portion in the first recorded area PGD has a geometrical shape change with respect to the first recorded area PGD. A predetermined address signal Sa recorded in the vicinity of a specific radius on the information recording medium disk in every third record trace recorded with a predetermined accurate record trace interval maintained by In addition to reading, the first laser beam is also used to detect tracking error information, and the tracking control system operates based on the detected tracking error information. The spot of the second light is tracked and controlled. The first laser beam mentioned above. The displacement drive of the second light spot is
This is performed by displacement-driving the condensing lens by an actuator to which an output signal from the tracking control system is supplied.

The address signal Sa read by the second light spot of the laser beam as described above is information pre-recorded in the second recorded area SPD area adjacent to the inside of the first recorded area PGD. The first and second light spots of the laser light are extracted by a gate signal generated based on the output signal of a photosensor that detects a signal Sp indicating the reference rotational phase of the recording medium disk, and the first and second light spots of the laser light are The spot is moved to the last recording trace formed in the first recorded area PGD in a short time.

The first light spot of the laser beam is the first recorded area PG
A signal indicating the reference rotational phase of the information recording medium disc previously recorded in the second recorded area SPD area when the end of the final recording trace in the recording traces formed in D is reached. The first kick pulse of the laser beam is supplied to the actuator, which is generated based on the output signal of the photosensor that detects Sp. The second light spot is located one recording trace interval before the end of the last recording trace in the recording traces in which the first light spot is formed in the first recorded area PGD. is rapidly displaced to the terminal part of the recorded trace. This state continues as long as the recording device is in a standby state.

Next, a recording apparatus that records information signals using an information recording medium disc having the above-described configuration will be described. FIG. 3 is a side view of a part of the mechanical part of the recording apparatus, and in this FIG. 3, D=32- is an information recording medium disc, 1 is a driving motor,
2 is a rotating shaft, 3 is a turntable, and 4 is a clamper. It is fixed and driven and rotated by a drive motor 1 at a predetermined number of rotations. The drive motor 1 described above is always driven and rotated at a predetermined rotation speed by a speed control circuit (not shown).

Further, in FIG. 3, 5 is a condenser lens, 6 is an actuator unit, 7 is an optical system unit, 8 is a rail for guiding the optical system unit 7 in the radial direction of the information recording medium disc, 9, 10 is a support for the rail 8 described above.

In FIG. 3, F is a transfer mechanism for the optical system unit 7, and in the illustrated example, the transfer mechanism F is composed of a transfer motor 11, spur gears 12 to 17, a pinion 18, and a rack 19. The rotational force of the transfer motor 11 is reduced in speed by spur gears 12 to 17 and transmitted to the pinion 18 meshing with the rack 19 fixed to the optical system unit 7, so that the optical The system unit 7 is transported along the rail 8.

Note that 20 is a photosensor for detecting a reference rotational phase signal from the information recording medium disc.

Next, FIGS. 4 and 5 show the optical system 7 used in the recording device.
21 and 22 are a side view showing an example of the configuration of the container, in each case 21 and 22 are the first container. second semiconductor laser, 23
．． 24 is a collimating lens, 25 is a polarizing prism, 26
．． 28 is a 174 wavelength plate, 27 is a dichroic mirror,
29 is a detection system for focus error, tracking error and address signal, 30 is a focus control and tracking control system, 6 is an actuator unit, 32 is a signal detection system, 5 is a condenser lens, and in FIG. The polarizing prism 33 is a dichroic mirror.

First, in the optical system unit 7 shown in FIG. 4, the first semiconductor laser 21 is a semiconductor laser used as a semiconductor laser that emits laser light whose intensity is modulated by the information signal to be recorded. The first semiconductor laser 21 emits a signal whose wavelength is, for example, 780, which is intensity-modulated by the information signal to be recorded.
Emit laser light of nm.

The laser light emitted from the first semiconductor laser 21, which emits laser light whose intensity is modulated by the information signal to be recorded as described above, is transmitted through the collimating lens 23→polarizing prism 31→polarizing prism 25→ The first light passes through the optical path of 1/4 wavelength plate 28 → condensing lens 5 → recording layer of the information recording medium disc and reaches the recording layer of the information recording medium disc.
By forming an image of the light spot S1, an information signal is recorded on the recording layer of the information recording medium disk.

The reflected light from the first light spot S1 described above is transmitted through the condenser lens 5→1/4 wavelength plate 28→polarizing prism 25-+1
/4 wavelength plate 26 → dichroic mirror 3 that transmits light with a wavelength of 780 nm and reflects light with a wavelength of 830 nm
The signal is supplied to the signal detection system 32 along the optical path 3→, and a monitoring signal is obtained from the signal detection system.

Further, in the optical system unit 7 shown in FIG. 4, the second semiconductor laser 22 is a semiconductor laser used as a semiconductor laser that emits laser light in an unmodulated state, and this second semiconductor laser 22 A laser beam for land irradiation with a constant intensity and a wavelength of, for example, 830 nm is emitted from the laser beam.

The laser beam with a wavelength of 830 nm and a constant intensity emitted from the second semiconductor laser 22 described above is transmitted through the collimating lens 24 → polarizing prism 25 → 1/4 wavelength plate 26 → the wavelength is 7
The information recording medium disk passes through the optical path of dichroic mirror 33 that transmits light with a wavelength of 80 nm and reflects light with a wavelength of 830 nm → 1/4 wavelength plate 26 → polarizing prism 25 → 1/4 wavelength plate 28 → condensing lens 5 → The image is formed on the recording layer of the information recording medium as a second light spot S2, but this second light spot S2 is recorded by the first light spot S1 on the recording layer of the information recording medium disk. The land portion between adjacent recording traces of information signals is brought into a state of uniformly high reflectance by irradiating the land portion between adjacent recording traces with the above-mentioned laser beam having a constant light intensity. The second light spot S2 of the land laser light and the first light spot S1 are designed to have substantially the same energy density.

Further, the reflected light from the second light spot S2 described above is transmitted from the condenser lens 5 to the quarter wavelength plate 28 to the polarizing prism 25.
After passing through the optical path →polarizing prism 31→, the light enters a detection system 29 for focusing errors, tracking errors, and address signals. A detection system 29 for focus error, tracking error, and address signal generates a tracking error signal by, for example, a push-pull method using the reflected light from the spot S2 of the second light incident thereon, and also detects, for example, astigmatism. A focus error signal is generated by a method, and the generated tracking error signal and focus error signal are supplied to a focus control and tracking control system 30, and the focus control and tracking control system 30 supplies a drive signal to an actuator unit. to drive and displace the condensing lens 5, and the first beam projected onto the recording layer of the information recording medium disc is
The second light spot SL, 82 is always in focus, and the sequential recording traces formed by the first light spot S1 are recorded on the recording layer while maintaining a predetermined interval between recording traces. In addition, when the recording apparatus is operated in standby mode, the focus error, tracking error, and address signal detection system 29 described above is
is incident on the The focus error, tracking error, and address signal detected by the address signal detection system 29 are sent to the address signal signal processing system in the recording apparatus.

Further, in the optical system unit 7 shown in FIG. 5, the first semiconductor laser 21 is a semiconductor laser used as a semiconductor laser that emits laser light whose intensity is modulated by the information signal to be recorded. The first semiconductor laser 21 emits a signal whose wavelength is, for example, 78, which is intensity-modulated by the information signal to be recorded.
Emit 0 nm laser light.

One laser beam emitted from the first semiconductor laser 21, which emits a laser beam whose intensity is modulated by the information signal to be recorded as described above, is transmitted through the collimating lens 23 → the polarizing prism 25 → 1/4 Wave plate 26 → dichroic mirror 27 that reflects light with a wavelength of 780 nm and transmits light with a wavelength of 830 nm → 1/4 wavelength plate 26 →
Polarizing prism 25 → 1/4 wavelength plate 28 → Condensing lens 5 →
By passing through the optical path of the recording layer of the information recording medium disk and being imaged as a first light spot Sl on the recording layer of the information recording medium disk, an information signal is transmitted to the recording layer of the information recording medium disk. recorded. The reflected light from the first light spot S1 follows the optical path of the condenser lens 5 → quarter-wave plate 28 → polarizing prism 25 → toward the collimating lens 24, but what is this light used for? is also not used.

Also, in the optical system unit 7 shown in FIG.

The second semiconductor laser 22 is a semiconductor laser used as a semiconductor laser that emits unmodulated laser light, and the second semiconductor laser 22 emits land irradiation with a constant intensity and a wavelength of, for example, 830 nm. Emit laser light for use.

The laser beam with a constant intensity and a wavelength of 830 nm emitted from the second semiconductor laser 22 is collimated by the collimating lens 24 → polarizing prism 25 → 1/4 wavelength plate 28 → condensing lens 5 → recording on the information recording medium disk. By being imaged as a second light spot S2 on the recording layer of the information recording medium disk through the optical path of the layer, recording is performed by the first light spot S1 on the recording layer of the information recording medium disk. Land portions between adjacent recording traces of recorded information signals are uniformly brought into a state of high reflectance by being irradiated with the above-mentioned laser beam having a constant light intensity. Second light spot S2 of the laser light for this land
The above-mentioned first light spot S1 has approximately the same energy density.

The reflected light from the second light spot S2 is transmitted through the condenser lens 5→1/4 wavelength plate 28→polarizing prism 25→1/4 wavelength plate 28→polarizing prism 25→1/4 wavelength plate 28
4-wavelength plate 26 → dichroic mirror 2 that reflects light with a wavelength of 780 nm and passes light with a wavelength of 830 nm
After passing through the optical path 7→, it enters a detection system 29 for focusing errors, tracking errors, and address signals.

A detection system 29 for focus error, tracking error, and address signal generates a tracking error signal by, for example, a push-pull method using the reflected light from the spot S2 of the second light incident thereon, and also detects, for example, astigmatism. A focus error signal is generated by a method, and the generated tracking error signal and focus error signal are supplied to a focus control and tracking control system 30, and the focus control and tracking control system 30 supplies a drive signal to an actuator unit. The condensing lens 5 is driven and displaced, and the first and second light spots 81 are projected onto the recording layer of the information recording medium disk.
．． 82 is always in focus and the first light spot S
The sequential recording traces formed by l are recorded on the recording layer while maintaining predetermined interval between recording traces, and when the recording apparatus is operated in standby mode, the above-mentioned focus error and The address signal detected by the tracking error and address signal detection system 29 is sent to the signal processing system for the AT 1 input signal in the recording apparatus.

FIG. 6 is a block diagram showing an example configuration of a recording device for an information recording medium disk according to the present invention, and in the block diagram shown in FIG. Components corresponding to each component of the apparatus are given the same drawing symbols as those used in FIG. 3.

Further, in FIG. 6, 35 is an input terminal for a signal to be recorded, 36 is an output terminal for a reproduced signal, LDAI, LD
A2 is a laser drive amplifier, MOD is a signal modulation circuit, A
M P is an amplifier, SAC is a signal processing circuit, ASEP is an address signal separation circuit, 0PCC is a control circuit, ○P is an operation unit, wpc is a waveform shaping circuit, MIX is a mixing circuit, TSC
is a tracking control circuit, r'sc is a focus control circuit, and OPC is an arithmetic circuit.

When an information signal is to be recorded on an information recording medium disc by the recording device, the information recording medium disc is placed on the turntable 3, fixed by the clamper 4, and the power switch is turned on.

As a result, the drive motor 1 is rotated at a predetermined number of revolutions by the operation of a speed control circuit (not shown), and the information recording medium disc fixed to the turntable 3 is also driven and rotated at a predetermined number of revolutions.

When the user inputs the recording mode to the operating section OP of the recording device, the condenser lens 5, actuator unit 6, optical system unit 7, etc. are transported in the radial direction of the information recording medium disc by the transport mechanism F. until it reaches the home position and stops. In this state, the control circuit 0P
Drive power is supplied to the semiconductor lasers 21 and 22 provided in the optical system unit 7 by control signals given from the CC to the laser drive amplifiers T, DAI, and LDA2.
Semiconductor laser 21. ．． Laser light is emitted from 22,
The first laser beam. Second light spot S1. ．． 82 is projected onto the first recorded area POD on the information recording medium disc.

The first laser beam mentioned above. The first light spot S1 of the second light spot S1 creates a predetermined accurate recording trace interval in the first recorded area PGD by changing the geometrical shape by the operation of the tracking control system. The recording trace pattern recorded in advance is correctly traced while the laser beam is being held, and the second laser beam is
By the operation of the tracking control system, the light spot is formed in the record trace pattern recorded in advance with a predetermined accurate record trace interval maintained by changing the geometric shape with respect to the first recorded area PGD. The land between the two records is traced correctly.

In other words, the second light spot S2 of the laser beam when the recording apparatus is in the recording standby mode is set to a predetermined accuracy due to a change in the geometrical shape in the first recorded area PGD of the information recording medium disk. The light is projected onto the part of the record trace pattern recorded while maintaining a record trace interval, but the optical system unit 7 having the configuration already described with reference to FIG. 4 is used as the optical system unit 7. In this case, the laser beam for land irradiation with constant intensity and wavelength of 830 nm emitted from the second semiconductor laser 22 in FIG. Plate 26 → Dichroic mirror 33 that transmits light with a wavelength of 780 nm and reflects light with a wavelength of 830 nm → 1/4 wavelength plate 26 → Polarizing prism 2
A second light spot S2 is formed on the recording layer of the information recording medium disc through the optical path of 5 → 1/4 wavelength plate 28 → condensing lens 5 →
The reflected light from the second light spot S2 of the laser beam for the land passed through the optical path of the condenser lens 5 → quarter wavelength plate 28 → polarizing prism 25 → polarizing prism 31 → After that, the reflected light from the second light spot S2 is incident on the focus error, tracking error, and address signal detection system 29, and the focus error, tracking error, and address signal detection system 29 uses the reflected light from the spot S2 of the second light incident thereon. Then, a 1-racking error signal is generated by, for example, a push-pull method, and a focus error signal is generated by, for example, an astigmatism method, and the generated tracking error signal and focus error signal are used for focus control and tracking control system. 3o, and in the focus control and tracking control system 30, a drive signal is supplied to the actuator unit 6 to drive and displace the condenser lens 5, and the first. Second light spot S
L, 82 is always in focus, and the first light spot S1 is directed to the first recorded area PGD on the information recording medium disk in a predetermined and accurate manner by changing the geometrical shape. The recording traces in the recording trace pattern recorded in advance are correctly traced while maintaining the recording trace interval, and the second light spot S2 of the laser beam is set to the first light spot by the operation of the tracking control system. Recorded area PG
By changing the geometric shape with respect to D, it is possible to correctly trace the land between two traces in a prerecorded trace pattern while maintaining a predetermined accurate trace interval. .

In the block diagram shown in FIG. 6, the arithmetic functions of the focus error, tracking error, and address signal detection system 29 blocks shown in the optical system unit 7 shown in FIG. 4 are separated as a block OPC. The focus control and tracking control system 3 displayed in the optical system unit 7 shown in FIG.
The functions of the focus control system and the tracking control system of 0 are independently displayed as a block of the focus control circuit FSC and a block of the tracking control circuit TSC. The same applies to the relationship between the configuration of the optical system unit 7 and the block diagram shown in FIG. 6).

Further, as described above, when the recording apparatus is in the recording standby mode, the optical system unit 7 having the configuration already described with reference to FIG. 5 is used as the optical system unit 7. In this case, the wavelength of the light emitted from the second semiconductor laser 22 in FIG.
The 30 nm laser beam passes through the optical path of the collimating lens 24 -> polarizing prism 25 -> 1/4 wavelength plate 28 -> condensing lens 5 -> the recording layer of the information recording medium disc, and enters the second recording layer of the information recording medium disc. The image is formed as a light spot S2, and the reflected light from this second light spot S2 is transmitted through the condenser lens 5 → quarter wavelength plate 28 → polarizing prism 25 → quarter wavelength plate 26 → with a wavelength of 780 nm. Reflects light and has a wavelength of 83
After passing through the optical path of the dichroic mirror 27→ which allows light of 0 nm to pass through, the light enters a detection system 29 for focusing errors, tracking errors, and address signals, and
A detection system 29 for focus error, tracking error, and address signal generates a tracking error signal by, for example, a push-pull method using the reflected light from the spot S2 of the second light incident thereon, and also detects, for example, astigmatism. A focus error signal is generated by the method, and the generated tracking error signal and focus error signal are supplied to the focus control and tracking control system 30, and the focus control and l-racking control system 30 sends a drive signal to the actuator unit 6. is supplied to drive and displace the condensing lens 5, and the first . The second light spots SL and S2 are always in focus, and the first light spot S1 is brought into contact with the first recorded area PGD on the information recording medium disk (■) due to a change in geometric shape. Correctly tracing the traces in a pre-recorded trace pattern while maintaining a predetermined accurate trace interval,
Further, the spot S2 of the second laser beam is moved to the first recorded area PG by the operation of the tracking control system.
By changing the geometric shape with respect to D, it is possible to correctly trace the land between two traces in a prerecorded trace pattern while maintaining a predetermined accurate trace interval. .

FIG. 7 shows that due to the operation of the tracking control system described above,
The first light spot S1 of the laser light correctly traces the recording trace in the recording trace pattern recorded in advance in the first recorded area PGD, and the second light spot S2 of the laser light correctly traces the recording trace in the recording trace pattern recorded in advance in the first recorded area PGD. FIG. 3 is a partially enlarged plan view showing a state in which a land between two traces in a trace pattern recorded in advance in a finished area PGD is correctly traced;

Now, as described above, the information recording medium disc used for recording information signals in the present invention has a first recorded area PGD.
In every third record trace that is recorded while maintaining a predetermined accurate record trace interval by changing the geometrical shape, a Since a predetermined address signal Sa is recorded in each case, as is clear from FIG. When there is a land laser beam, the address signal Sal recorded in advance on the recording trace t2 is read, and the second light spot S2 of the laser beam for the land is read.
However, when tracing the land Q4 and when tracing the land Q5, the address signal Sa2 recorded in advance on the recording trace t5 is read, but the spot S2 of the second beam of the laser beam for the land is When tracing land Ω3, there are traces t3. on both sides of land Ω3. Since no address signal is recorded during t4, the address signal is not read when the second light spot S2 of the laser beam for the land is tracing the land Q3.

That is, the second light spot S of the laser light for the land
2 traces successive lands, the second light spot S2 of the laser beam for the land sequentially traces the lands on both sides of the recording trace in which a specific address signal is recorded. Sometimes, the address signal appears in the reflected light from the lands on both sides of the recorded trace, and when the second light spot S2 of the laser beam for the land traces the next land, the address signal appears in the reflected light from the next land. No address signal appears on the land, and another specific and identical address signal appears in the reflected light from the two lands subsequent to the land from which the reflected light on which no address signal appeared as described above was obtained. This situation is repeated in a certain repeating pattern.

Therefore, the second light spot S2 of the laser light for the land
Since the address of each recording trace can be determined based on the address signal that appeared in the reflected light from the land next to the land where no address signal appeared in the reflected light from the land, the 1 recorded area P
Recording every third track without recording an address signal for all the tracks recorded while maintaining a predetermined accurate track interval by changing the geometrical shape in GD. The addresses of all recorded traces can be known by simply recording predetermined address signals Sa in the vicinity of specific radii of the information recording medium disc in the traces.

Then, as described above, a predetermined address signal Sa is recorded in advance in the vicinity of a specific radius of the information recording medium disk only for every third recording trace in the first recorded area PGD of the information recording medium disk. By doing so, it becomes possible to use the second light spot S2 of the laser beam for the land for both the detection of tracking error information and the reading of the address signal, and the detection of the tracking error information. and address signal reading can be performed with a single detection system, thereby simplifying the optical system.

Suppose that the first recorded area P on the information recording medium disc
If address signals are recorded for all the recording traces in Gr), the second light spot S2 of the laser beam projected onto the land part is traced by the address signal. Since the two address signals recorded on the recording traces on both sides of the land are read simultaneously, it is impossible to read the address signal using the reflected light from the second light spot of the laser beam for the land. It is possible.

Now, as mentioned above, the second light spot S2 of the laser beam projected onto the land portion in the first recorded area POD of the information recording medium disc is located in the first recorded area POD.
A certain radius on the information recording medium disc is detected in every third record trace recorded while maintaining a predetermined accurate record trace interval TP by changing the geometric shape with respect to GD. In addition to reading predetermined address signals Sa recorded nearby, they are also used to detect tracking error information, and the detected tracking error information is converted into a tracking error signal in the arithmetic circuit OPC and sent to the tracking control circuit TSC. The focus error signal that is supplied and output from the arithmetic circuit OPC described above is also supplied to the focus control circuit FSC.

The tracking control signal generated by the tracking control circuit TSC is supplied to the actuator unit 6 via the mixing circuit MIX, and the focus control signal generated by the focus control circuit FSC described above is supplied to the actuator unit 6. As a result, the first laser beam. The second light spots Sl and S2 are subjected to focus control and tracking control.

Further, the address signal Sa read by the second light spot S2 of the laser light and the signal read by the first light spot S1 of the laser light are amplified by the amplifier AMP, and then the address signal separation circuit ASEP and signal processing circuit S
The signal that is supplied to the AC and processed by the signal processing circuits S A and C is sent to the output terminal 36 .

In the address signal separation circuit ASEP described above, the waveform shaping circuit W is based on the signal Sp indicating the reference rotational phase of the information signal recording medium disc detected by the photosensor 20.
Separate the address signal using a gate pulse that corresponds to the time position of the address signal Sa generated by the PC,
The separated address signal Sa is supplied to the control circuit opcc. The ffi control circuit OPCC checks whether the address signal Sa supplied to it is the address signal recorded in the record trace next to the record trace in which no address signal Sa is recorded, and then checks whether or not the address signal Sa supplied to it is the address signal recorded in the record trace after the record trace where no address signal Sa is recorded. The address is determined, and the first address of the laser beam is emitted. second light spot 81,
The address where 82 is located is the first recorded area P
Calculate how far ahead the address of the last recorded trace is in the recorded trace pattern recorded in advance in GD, generate the necessary kick pulse based on the result, and send it to the mixing circuit MIX. supply to.

In the mixing circuit MIX described above, the tracking control circuit T
The tracking control signal sent from the SC and the kick pulse sent from the control circuit OPCC are mixed and supplied to the actuator unit 6, and the actuator unit 6 displaces and drives the condensing lens 5 to generate a laser beam. 1st. The second light spots 81 and 82 are caused to rapidly approach the final trace in the trace pattern previously recorded in the first recorded area PGD.

Then, the control circuit opcc outputs the first laser beam according to the address signal supplied thereto. The number of kick pulses is decreased as the position of the second light spots St and S2 approaches the final recording trace in the recording trace pattern previously recorded in the first recorded area PGD, and the laser The first and second light spots Sl and S2 smoothly move to the final recording trace in the recording trace pattern pre-recorded in the first recorded area - PG D to complete the final recording. Be located on the trace.

In the control circuit 0PCC, when the recording apparatus is in the recording standby mode, the first . Second light spot Sl, S
2 reaches the end of the final recording trace in the recording trace pattern recorded in advance in the first recorded area PQD, from the control circuit 0PCC to the mixing circuit MTX,
The first laser beam. Second light spot 81. S2 first
A kick pulse that is driven by a variable f is supplied from the end of the last record trace in the record trace pattern previously recorded in the recorded area hiPGD to the end of the previous record trace.

By supplying the kick pulse described above to the actuator, the first . The second light spot is located in the first recorded area P G D
It is rapidly displaced from the end of the last record in the record traces formed in , to the end of the previous record by one record interval. This state continues while the recording device is in a standby state, and the first light spot S of the laser light is
1, while the recording apparatus is in standby mode, the last recorded trace in the first recorded area PGD is repeatedly traced.

The first light spot S1 of the laser beam is the first recorded area P
When a command to start recording is input to the operation unit OP while the last record trace formed on the GD is being repeatedly traced, the control circuit OPCC stops supplying the above kick pulse, and The recording trace formed by the first light spot S1 of the laser beam whose intensity is modulated by the information signal targeted for recording is previously provided in the first recorded area PGD. Recording traces that are continuous with the end portion of the recording trace pattern and are always separated by a predetermined recording trace interval TP are recorded and formed on the recording layer by the first light spot S1 of the laser beam.

Recording traces that are sequentially recorded on the recording layer of the information recording medium disk by the first light spot S1 of the laser beam whose intensity is modulated by the information signal to be recorded. It goes without saying that the interval is always the predetermined trace interval TP.

That is, the recording traces that are sequentially recorded and formed on the recording layer of the information recording medium disk by the first light spot S1 of the laser beam whose intensity is modulated by the information signal to be recorded are Due to the recorded information signals, areas with high light reflectance and areas with low light reflectance are arranged alternately, so the average light reflectance of the recorded trace is Since the light reflectance is lower than the light reflectance at the land portion, the second light spot s2 of the laser light is different from the two spots that have been recorded and formed by the first light spot S1 of the laser light. By projecting the laser beam in the middle of the recorded trace, the second beam spot S of the laser beam described above
Tracking error information is obtained by the reflected light from the recording layer of the information recording medium disc according to the first .2 of the laser beam. Second light spot S1. S
Tracking control for 2 is performed, and the recording traces that are sequentially recorded and formed by the first light spot S1 of the laser beam whose intensity is modulated by the information signal targeted for recording are recorded in advance in the area PGD. This is because the recording traces are always made at the predetermined interval TP by following the records formed at the predetermined interval TP in the provided record trace pattern.

(Effects) As is clear from the detailed explanation above, the information recording medium disk and its recording device of the present invention are capable of generating the first laser beam whose intensity is modulated by the information signal to be recorded. The light spot forms a recording trace of the information signal on the recording layer of the information recording medium disk, and also forms a recording trace of the information signal on the land portion between adjacent recording traces of the recording layer of the information recording medium disk. Information recording in which an information signal is recorded using an information signal recording method in which a second light spot of an unmodulated laser beam is irradiated onto the object, and an unmodulated signal is recorded there. A medium disk comprising the above-mentioned first. A recording trace pattern with a predetermined accurate recording trace interval is preliminarily set in a geometric shape in an area provided in the inner part adjacent to the recording area set to be recorded by the second light spot. Each of the three recording traces in the recording trace pattern has a predetermined address signal pre-recorded in the vicinity of a specific radius on the information recording medium disk, and further, An information recording medium disk in which a signal indicating a reference rotational phase of the information recording medium disk is prerecorded in an area adjacent to the inside of the area where the above-mentioned marking pattern is recorded as a change in geometric shape. , and the first light spot of the laser beam whose intensity is modulated by the information signal to be recorded, forms a recording trace of the information signal on the recording layer of the information recording medium disk, and the information recording medium described above. A second light spot of an unmodulated laser beam is also irradiated onto the land between adjacent recording traces of information signals in the recording layer of the disk, and an unmodulated signal is applied thereto. As an information recording medium disc on which an information signal is to be recorded using an information signal recording method that records an information signal, the above-mentioned 1. A recording trace pattern with a predetermined accurate recording trace interval is geometrically formed in an area provided in the inner part adjacent to the recording area set to be recorded by the second light spot. It is formed in advance by a change in shape, and a predetermined address signal is prerecorded in every third record trace in the aforementioned record trace pattern in the vicinity of a specific radius on the information recording medium disk, and further, A signal indicating the reference rotational phase of the information recording medium disk is prerecorded in an area adjacent to the inside of the area where the above-mentioned record trace pattern is recorded as a change in geometric shape, and the above-mentioned Tracking is performed from the light reflected by the second light spot of the laser beam that is projected between two adjacent recording traces in the recording trace pattern that has been formed in advance by changing the geometrical shape of the information recording medium disk. A first signal detecting means for detecting error information, a second signal detecting means for detecting an address signal, and detecting a signal indicating a reference rotational phase of the information recording medium disk recorded on the information recording medium disk. The first signal detecting means includes a photo sensor, an arithmetic and control circuit, a tracking control circuit, an optical system, and an actuator. A tracking control signal obtained based on the detected tracking error information causes the first light spot of the laser beam to be correctly positioned on the recording trace in the recording trace pattern previously formed by the change in the geometrical shape. means for tracking control of the first light spot of the laser light and the second light spot of the laser light, and a gate created based on the output signal from the photo sensor. means for detecting an accurate address position of each recording trace based on information regarding the address signal detected by the second signal detecting means described above to which the signal is supplied; When the first light spot reaches the vicinity of the final end of the recording trace in the recording trace pattern previously formed by the change in the geometrical shape, the first light spot is created based on the output from the photo sensor. A kick pulse is applied to the actuator of the focusing lens to make the first light spot of the laser beam one of the last of the marks in the mark pattern previously formed by the above-mentioned geometric change. A means for displacing the previous recording trace, and a means for driving the displacement of the previous recording trace, and a means for driving the displacement of the previous recording trace, and when the recording apparatus is in the information signal recording mode, the laser beam is applied continuously to the recording trace pattern previously formed by the change in the geometrical shape described above. a first signal for detecting tracking error information from light reflected by a second light spot of the laser beam projected between two adjacent recording traces in a record formed by one light spot; Means for performing tracking control on the first light spot of the laser light and the second light spot of the laser light using a tracking control signal obtained based on tracking error information detected by the detection means. Therefore, in the information recording medium disk and its recording device of the present invention, the standby of the recording operation performed prior to the start of the recording operation of the information signal on the information recording medium disk. mode, the second laser beam beam is projected at a position spaced apart from the first laser beam spot by 1-/2 of the recording trace interval TP in the width direction of the recording trace. The second light spot S2 is set so that the light spot S2 is located between two adjacent recording traces in the recording traces provided in advance in the first recorded area PGD. A 1-racking control operation is performed using the reflected light from the
The first image projected onto the recording layer of the information recording medium disk. The spot of the second light is always in focus, and the sequential recording traces formed by the spot of the first light are also the same as when the spot of the second light of the laser light is the same as that of the first laser light. The reflected light from the recording layer of the information recording medium disc by the second light spot of the laser light is The tracking error information obtained from the first . Tracking control is performed on the second light spot, and recording traces are formed sequentially by the first light spot of the laser light whose intensity is modulated by the information signal to be recorded. Predetermined recording trace interval TP in the recording trace pattern provided in advance in the first recorded area PGD
Since the recording traces are always formed at a predetermined interval TP by imitating the recording traces that are formed with a distance between Recording traces having intervals TP can be sequentially formed. Further, in the present invention, a predetermined address signal is recorded in advance in the vicinity of a specific radius of the information recording medium disk only for every third recording trace in the first recorded area PGD on the information recording medium disk. , the address signal is read by tracing the second light spot of the laser beam to successive lands, and the read address signal is transferred to the second recorded area SPD of the information recording medium disk.
The address of each recording trace is determined by extracting it using a signal indicating the reference rotational phase of the information recording medium disc recorded in The first light spot of the laser beam is rapidly moved to the final recorded trace of the trace pattern, and the reference of the information recording medium disk is recorded in the second recorded area SPD of the information recording medium disk described above. While the recording apparatus is in a recording standby state, the first light spot of the laser beam is moved to the first spot on the information recording medium disk using a kick pulse generated based on a signal indicating the rotational phase of the information recording medium disk. Since the last recorded trace of the recorded trace pattern in the first recorded area PGD can be repeatedly traced, the width of the first recorded area PGD recorded in advance on the information recording medium disk can be widened, At the start of the recording operation, the first laser beam is emitted. Even if the second light spot is always projected onto the recording trace in the first recorded area POD, it is possible to set the recording device to the recording standby state in a short time and also to prevent recording. Tracking can be started in a short time, and the second light spot of the laser beam projected onto the land can be used both for detecting tracking error information and for reading address signals. Detection of error information and readout of address signals can be performed with a single detection system, which makes it possible to simplify the optical system. According to the invention, the above-mentioned conventional problems can be satisfactorily solved.

[Brief explanation of drawings]

FIG. 1 is a plan view of an example configuration of the information recording medium disc of the present invention, and FIGS. 2 and 7 illustrate the manner in which information signals are recorded on the information recording medium disc shown in FIG. 1. FIG. 3 is an enlarged plan view of a part of the information recording medium disk according to the present invention; FIG. 5 and 5 are side views showing a configuration example of an optical system unit used when recording information signals on the information recording medium disk of the present invention, and FIG.
The figure is a block diagram of an embodiment of the recording apparatus of the present invention.

Claims (1)

[Claims] 1. Forming a recording trace of the information signal on the recording layer of the information recording medium disc by a first light spot of a laser beam whose intensity is modulated by the information signal to be recorded; , irradiating a second light spot of an unmodulated laser beam also onto a land portion between adjacent recording traces caused by the information signal in the recording layer of the information recording medium disc; An information recording medium disc on which an information signal is to be recorded using an information signal recording method in which an unmodulated signal is recorded, and the recording is performed using the first and second light spots described above. A record trace pattern with a predetermined accurate record trace interval is formed in advance by changing the geometric shape in an area provided in an inner part adjacent to the recording area set as the desired recording area, In addition, a predetermined address signal is prerecorded in every third record trace in the aforementioned record trace pattern in the vicinity of a specific radius on the information recording medium disc, and furthermore, the record trace pattern described above is geometrically shaped. An information recording medium disc 2 in which a signal indicating a reference rotational phase of the information recording medium disc is prerecorded in an area adjacent to the inside of the area where the change in shape is recorded, and an information signal to be recorded. The first light spot of the laser beam whose intensity is modulated by the information recording medium disk forms a recording trace of the information signal on the recording layer of the information recording medium disk, and at the same time forms a recording trace of the information signal on the recording layer of the information recording medium disk. An information signal recording method in which a second light spot of an unmodulated laser beam is irradiated onto land portions between adjacent recording traces to record an unmodulated signal thereon. As an information recording medium disk on which information signals are to be recorded, an area provided in an inner part adjacent to the recording area where recording is to be performed by the first and second light spots, A record trace pattern that maintains a predetermined accurate record trace interval is formed in advance by changing the geometric shape, and the three
In the recording traces of each book, a predetermined address signal is prerecorded in the vicinity of a specific radius on the information recording medium disc, and furthermore, the recording trace pattern described above is recorded as a change in geometric shape in an area. In the area adjacent to the inside of
A signal indicating the reference rotational phase of the information recording medium disk is recorded in advance, and two adjacent records in the record trace pattern previously formed on the information recording medium disk by changes in the geometrical shape are used. a first signal detection means for detecting tracking error information from the light reflected by the second light spot of the laser beam projected between the tracks; and a second signal detection means for detecting the address signal; It includes a photosensor that detects a signal indicating a reference rotational phase of the information recording medium disc recorded on the information recording medium disc, an arithmetic and control circuit, a tracking control circuit, an optical system, and an actuator. , when the recording apparatus is in the recording standby mode, the first light spot of the laser beam is adjusted to the position indicated by the tracking control signal obtained based on the tracking error information detected by the first signal detection means. The first light spot of the laser light and the second light spot of the laser light are arranged so that the spots of the first light of the laser light and the second light of the laser light are correctly positioned on the recording marks in the record trace pattern formed in advance by the change in the geometrical shape. and means for tracking control of each record trace based on information regarding the address signal detected by the second signal detection means described above to which a gate signal generated based on the output signal from the photosensor is supplied. means for detecting an accurate address position of the address position; and recording in a record trace pattern in which a first light spot of the laser beam is formed in advance by changing the geometric shape described above based on the detection result of the address position. When reaching near the final end of the trace, a kick pulse generated based on the output from the photosensor described above is supplied to the actuator of the condensing lens, and the first light spot of the laser beam is shaped into the shape described above. a means for driving the displacement to a record trace immediately before the last record trace in a record trace pattern formed in advance by a change in the physical shape; The above-mentioned laser beam is projected onto the middle of two adjacent recording traces in the recorded trace formed by the first light spot of the laser beam, continuously on the recorded trace pattern previously formed by the change in the geometrical shape. The first light of the laser light is detected by a tracking control signal obtained based on the tracking error information detected by the first signal detection means that detects tracking error information from the light reflected by the second light spot of the laser light. An information signal recording device comprising means for performing tracking control on the spot and the second light spot of the laser beam.