JPH11283280A - Optical disk, device and method for recording and reproducing optical disk, and device for producing master disk of optical disk - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an optical disk capable of recording and reproducing data with high density and high accuracy. SOLUTION: In this optical disk 1 having a track to be radially wobbled at a fixed frequency at the time of rotation at constant linear velocity(CLV) while forming group width and land width constant, the presence/absence of wobble on one of the left and right side walls of the track is made correspondent to the data bit of address information and by continuously wobbling the other side wall, the address information can be stably provided while being synchronously demodulated even on a land 3L or group 2G. Therefore, since CLV control is enabled as well, data can be recorded and reproduced with high density.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recordable optical disk in which pre-grooves are wobbled and spindle rotation control information and address information are recorded. The present invention relates to an optical disk recording / reproducing apparatus for recording and reproducing data at high density, an optical disk recording / reproducing method, and an optical disk master manufacturing apparatus for manufacturing a master of the optical disk.

[0002]

2. Description of the Related Art When data is recorded on a disc, it is necessary to record address information on the disc in advance so that the data can be recorded at a predetermined position. This address information is stored in the CD-R's ATIP (Absolute Time).
In some cases, a track is wobbled and recorded in correspondence with frequency-modulated address information as in In Pregroove.

That is, as shown in FIG. 10, a track for recording data is formed in advance as a pre-groove g, and a side wall w of the pre-groove g is wobbled in accordance with frequency-modulated address information (meandering). Let it do). In this way, the address information can be read from the wobbling, and data can be recorded at a desired track position on the disk D.

[0004]

However, when an address is recorded by wobbling by frequency modulation as described above, it is possible to accurately read the address when recording data on this pre-groove track. , Data can be recorded at an accurate position. However, when the land track is scanned, the wobbling signals of the left and right groove tracks adjacent to the land track are combined, so that there is a problem that it is difficult to correctly reproduce the wobbling corresponding to the scanning of the land track. . As a result, rotation control information and address information for rotating the disk D cannot be read, and there is a problem that it is difficult to record data on a land track.

As one method for solving this problem, Japanese Unexamined Patent Publication No. Hei 9-231580 discloses a method in which a synchronization signal serving as a reference for a rotation control signal is recorded by wobbling, and address information is formed by prepits. The information recording area is divided into a plurality of zones in the radial direction, and the groove wobbles in the radial direction at a predetermined frequency according to each zone when the recording medium is rotated at a constant angular velocity in each of the plurality of zones. By setting the spatial frequency of the wobble to be substantially constant for each zone, a single frequency wobble can be correctly reproduced even on a land track. The address information can be obtained from both the land and the groove if the address information is previously carved as a pre-pit on the boundary between the land and the groove.

However, in this method, as shown in FIG. 11 which is an enlarged view of a main part conceptually showing a disk form,
The dedicated area ID of the address pit is required, and the recording data is further divided.
VFO (Variable Frequency Oscillate) is placed after the address pit area (at the beginning of data) so that L can be easily synchronized.
An area VFO for inserting r) is required, and the substantial recording capacity of the disc is reduced.

Therefore, in a disk for recording data on both lands and grooves, it is necessary to physically separate the address area and the data area, and there is a problem that it is difficult to perform high-density recording.

SUMMARY OF THE INVENTION The present invention has been made in view of such circumstances, and enables a high-density recording by using both an address area and a data area on a disk for recording data on both lands and grooves. It is to be.

[0009]

As means for achieving the above object, the present invention provides an optical disk, an optical disk recording / reproducing apparatus, an optical disk recording / reproducing method, and an optical disk master having the following constitutions (1) to (7). Provide a manufacturing device.

(1) As shown in FIG. 1, an optical disk formed by wobbled a track for recording data, wherein the groove width and the inter-groove width of the track are substantially constant, and the wobble is When the optical disk is rotated at a constant linear velocity, the first track is formed at both ends of the track so that a substantially constant frequency is obtained from the inner circumference to the outer circumference, and is formed continuously at one end of the track. And a second wobble formed at the other end with a displacement corresponding to the address information.

(2) As shown in FIG. 8, the optical disk is formed with wobbled tracks for recording data, and the groove width and the inter-groove width of the tracks are substantially constant. An optical disc formed at both ends of the track so that a substantially constant frequency is obtained from the inner circumference to the outer circumference when the optical disc is rotated at a constant linear velocity, and corresponding to the address information. .

(3) The optical disk according to claim 1 or 2, wherein the address information of the wobble is at least an address indicating a sector number or a block number, and a cycle of the address extends in a radial direction. An optical disc characterized by being substantially constant.

(4) As shown in FIGS. 12 and 13, an optical disk is formed by wobbled a track for recording data, and the groove width and the groove width of the track are substantially constant. The wobble is formed such that a substantially constant frequency is obtained from the inner circumference to the outer circumference when the optical disk is rotated at a constant linear velocity, and the track is radially adjacent at least once for one rotation of the optical disk. An optical disc characterized in that the wobble start phases are aligned.

(5) As shown in FIG. 5, there is provided an optical disk recording / reproducing apparatus for recording / reproducing data on / from the optical disk according to claim 1, which is obtained by performing recording / reproducing scanning on an optical disk rotated at a constant linear velocity. Detecting means for detecting a wobbling signal corresponding to the wobble from the recorded / reproduced signal, and extracting a first wobble signal corresponding to the first wobble from the wobbling signal and using the extracted first wobble signal. Wobbling signal extracting means for extracting a second wobble signal corresponding to the second wobble from the wobbling signal, and address information reading means for reading the address information based on the second wobble signal. An optical disk recording / reproducing apparatus for rotating an optical disk based on address information.

(6) An optical disk recording / reproducing method for recording / reproducing data on / from the optical disk according to claim 1,
A detection procedure for detecting a wobbling signal corresponding to the wobble from a recording / reproducing signal obtained by recording / reproducing scanning on an optical disc rotated at a constant linear velocity, and a first wobble signal corresponding to the first wobble is detected from the wobbling signal. By extracting a wobble signal and using the extracted first wobble signal,
A wobbling signal extraction procedure for extracting a second wobble signal corresponding to the second wobble from the wobbling signal; and an address information reading procedure for reading the address information based on the second wobble signal. An optical disk recording / reproducing method, comprising: rotating an optical disk based on information.

(7) As shown in FIG. 3, an optical disk master manufacturing apparatus for manufacturing an optical disk master according to claim 1, wherein a clock having a substantially constant frequency corresponding to the first wobble is provided. A first optical deflecting means for optically deflecting the exposure laser light with a synchronous wobble signal obtained by shaping the waveform;
A second optical deflecting unit for optically deflecting the exposure laser light with an address information wobble signal obtained by modulating the address information with the clock corresponding to the second wobble; and the first and second optical deflections First output from each means
And a wobble corresponding to the first and second wobbles is formed on the master using the second laser beam for light deflection exposure.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an optical disk, an optical disk recording / reproducing apparatus, an optical disk recording / reproducing method, and an optical disk master manufacturing apparatus of the present invention will be described with reference to FIGS.
3 will be described. FIG. 1 shows the configuration of the optical disk of the present invention. As shown in FIG. 1A, a pre-groove 2 which is a track for recording data is previously formed on the optical disc 1 in a spiral manner from the inner circumference to the outer circumference. The direction of the spiral may be formed from the outer periphery toward the inner periphery, or may be concentric. The width of the groove (guide groove) 2 is constant, and the width of the land (between the guide grooves) 3 is also constant.

As a recording method used for an optical disk having such a configuration, it is possible to record data on both the groove G and the land L by using both a groove and a land as tracks on which data is to be recorded. Alternatively, data can be recorded using only the groove G as a recording track. As shown in FIG. 1B, the groove pitch (land pitch) is, for example, 1.
The groove G (land L) is wobbled by a small amount in the radial direction. The wobbling amplitude of the groove G (land L) is, for example, about 0.01 μm, and is preferably sufficiently smaller than the groove pitch (land pitch) so as not to affect the original tracking. The repetition frequency of such wobbling is set to be a constant frequency when the optical disc 1 is rotated at a constant angular velocity.

The spatial frequency (the number of times of wobbling per unit line length) is set to be substantially constant. The spatial frequency of the groove G is made equal from the innermost circumference to the outermost circumference. This spatial frequency is preferably set to a frequency sufficiently higher than the tracking servo band (generally several KHz) when actually rotating at the recording rotational speed so as not to affect the original tracking. .

In FIG. 1, the phases of the adjacent groove wobbles and land wobbles coincide, and the width of the land L is formed to be constant. FIG. 2 is a sectional perspective view of the optical disk.

As shown in FIG. 2, the left and right side walls (both ends) of the groove track are wobbled at the frequency of the synchronization signal (for example, a period of 75 μm), and one of the left and right side walls is from the inner circumference to the outer circumference. The meandering is formed continuously, and the other of the left and right side walls is formed by determining the presence or absence of the meandering according to the data bit of the address information. For example, in a section where the data bit of the address information is "1" like a disk track shown in FIG. 6A, one of the left and right side walls of the track is formed so as not to meander for three periods of wobbling, and the data of the address information The section where the bit is “0” is formed in a meandering manner. That is, wobbling is formed with a change amount corresponding to the address information.

By forming the groove 2 as described above, wobbling can be detected stably even when scanning the land track and also on the land 3 as in the case where the groove 2 is scanned. Address information can be obtained stably as on the groove.

FIG. 3 shows an example of the configuration of an optical disk master manufacturing apparatus for manufacturing a master of the optical disk 1 having the pregroove 2. The master clock is frequency-divided by the frequency divider A1 to generate a continuous signal having a period of 3 μs, for example.
The synchronization signal wobbling signal (synchronous wobble signal) shaped into a sine wave by the LPF (Low Pass Filter) A2 drives the first optical deflector A4 via the optical deflector driving amplifier A3.

The modulation circuit A5 is supplied with a signal obtained by dividing the master clock and address information. The modulation circuit A5 modulates the modulation data bits (“1”, “1”) of the address information.
The presence / absence of a wobble is determined in accordance with the address data bit represented by "0", and an address wobbling signal (address information wobble signal) is output. The address wobbling signal is also shaped into a sine wave by the LPFA 6 and the amplifier A7.
The second optical deflector A8 is driven via. Laser light (laser light for master exposure) passing through the first and second optical deflectors A4 and A5 has a radius on the master AD via the objective lens A5 so as to form left and right side walls of the groove 2, respectively. It is arranged adjacent to the direction and exposed. Spindle motor A
Numeral 10 rotates the master disc AD at a predetermined speed. In the figure, AM1 and AM4 are half mirrors, A
M2 and AM3 are total reflection mirrors.

FIG. 4 shows the first and second optical deflectors A4 and A5.
1 shows an embodiment of the drive signal of FIG. A wobble A signal for a synchronous signal of a continuous sine wave having a constant period generated by dividing the master clock is supplied to the first optical deflector A via an amplifier A3.
4 is supplied. The presence / absence of the address wobble signal B is determined according to the bit data of the wobble address signal so that, for example, when the address bit data is “1”, the sine wave signal is not output for three cycles, the amplifier A
7, and is input to the second optical deflector A8.

The master disc AD is developed, a stamper is created from the master disc AD, and a number of replica optical discs 1 are formed from the stamper. As a result, the synchronization signal (wobble A signal) and the address signal (wobble B signal)
Thus, the optical disc 1 on which the pre-groove 2 is formed can be obtained. The left and right side walls of the pregroove 2 of the optical disk 1 are formed (wobbled) in accordance with the synchronization signal and the address signal.

FIG. 5 shows an example of the configuration of an optical disk recording / reproducing apparatus for recording / reproducing data on / from the optical disk 1 thus obtained. The optical head B1 of the optical disk recording / reproducing apparatus B irradiates the optical disk 1 rotated at a constant linear velocity with laser light, records recording data on the optical disk 1, and reproduces reproduction data from the reflected light. I do. The recording / reproducing circuit B2 outputs the recording data to the optical head B1 by modulating the data by a predetermined method. The recording / reproducing circuit B2 appropriately demodulates reproduced data input from the optical head B1 and outputs the demodulated data to the outside.

The wobble detection circuit B3 detects a wobble signal from the RF signal reproduced and output by the optical head B1. The wobble signal is converted into a stable synchronization signal by a PLL (Phase Locked Loop: phase synchronization) B8, sent to the motor control circuit B9 of the spindle motor B10, and then output to the CLV (CoV).
nstant Linear Velocity: Used for rotation control. On the other hand, both the wobble signal output from the wobble detection circuit B3 and the synchronization signal output from the PLL B8 are also supplied to an AM (Amplitude Modulation) demodulation circuit B4. The AM demodulation circuit B4 demodulates the wobble signal, which is amplitude-modulated and reproduced, using a synchronization signal. The address information reading circuit B5 reads address data bits, which are address information, from the demodulated signal, and sends the read result to control. The signal is output to the circuit B6. The feed control circuit B6 controls the feed motor B7 to control the optical head 1 according to the address information.
And outputs a feed signal in the radial direction. On the other hand, the feed control circuit B6 is supplied with the scanning address information from the recording / reproducing circuit B2 at which the optical head 1 is currently performing the recording / reproducing scanning. Thus, the recording / reproducing circuit B2 detects and confirms the correct position of the sector where the optical head 1 is currently performing recording / reproducing scanning, and outputs the recording data to the optical head 1 and the demodulated reproduced data to the external device. Do. Thus, the wobble signal is reproduced in the land 3 and the groove 2 similarly,
A stable synchronization signal and address signal can always be obtained.

FIG. 6 shows an example of a track to be reproduced and a reproduced signal waveform. In the wobble detection signal (FIG. 8B), the amplitude of the wobble signal is reduced in a section where one of the right and left side walls of the track to be reproduced does not meander, as compared with a portion where both the left and right side walls meander. The section in which the wobble signal amplitude is reduced is a section in which the address data bit corresponds to "1". The synchronization signal may be generated by binarizing the wobble signal, or may be generated by a PLL. The address signal of the wobble signal is easily demodulated by a demodulation circuit using means (not shown) such as synchronous detection.

FIGS. 7 and 8 show another configuration of the optical disk of the present invention. As shown in FIG. 7, a pre-groove 2a, which is a track for recording data, is formed on the optical disc 1a in a spiral shape from the inner circumference to the outer circumference in advance. The direction of the spiral may be formed from the outer periphery toward the inner periphery, or may be concentric. The width of the grooves (guide grooves) 2a and Ga is constant,
The widths of the lands (between the guide grooves) 3a and La are also formed to be constant. The wobbles are formed at both ends of a track (groove track) so that when the optical disc 1a is rotated at a constant linear velocity, a substantially constant spatial frequency is obtained from the inner circumference to the outer circumference and corresponding to the address information. I have.

In the groove 2a, the left and right side walls (both ends) of the groove track are wobbled at the frequency of the synchronization signal wobble S (synchronization signal) (for example, a period of 75 μm), and one of the left and right side walls is from the inner circumference to the outer circumference. A continuous meander is formed, and the other of the left and right side walls is formed by determining whether or not there is meander according to the data bit of the address information. For example, like the disk tracks shown in FIGS. 9A and 9B, the data bits of the address information are "
The section "1" is formed so that the left and right side walls of the track do not meander for three periods of wobbling, and the section where the data bit of the address information is "0" is formed meandering.

FIG. 9 shows an example of a track for reproducing the optical disk 1a and a reproduction signal waveform. In the wobble detection signal ((B) in the figure), the amplitude of the wobble signal is lost in a section where both the right and left side walls of the track to be reproduced have no meandering. The section where there is no wobble signal amplitude is a section where the address data bits correspond to "1". From the burst-like wobble signal (synchronization signal wobble) S, a stable synchronization signal is generated by PLL. The address information (address data bits) of the wobble signal is easily demodulated by a demodulation circuit using means (not shown) such as envelope detection or synchronous detection.

By forming the grooves 2 and 2a as described above, wobbling is stably detected on the groove.

FIG. 12 shows another configuration of the optical disk of the present invention. As shown in the figure, a pregroove, which is a track for recording data, is formed on the optical disc in a spiral shape from the inner circumference to the outer circumference. The direction of the spiral may be formed from the outer periphery toward the inner periphery, or may be concentric. The width of the groove (guide groove) is constant, and the width of the land (between the guide grooves) is also constant. Wobble (track wobbling) occurs when the optical disc is rotated at a constant linear velocity.
It is formed so that a substantially constant spatial frequency can be obtained from the inner circumference to the outer circumference. A track is an optical disk in which the start phases of wobbles adjacent in the radial direction of the disk are aligned at least once per rotation of the optical disk. For example, if the groove pitch of the groove track is 1.2 μm,
The difference in the length of one circumference of adjacent groove tracks is
1.2 μm × 2π = about 7.5 μm. If the wobble period is 75 μm, the phase of the wobble of the adjacent track is 360 ° × 7.5 μm / 75 μm = 36 ° at the maximum.
Is obtained. If the phase difference of the wobble period due to the difference in the length per round of tracks adjacent in the radial direction is about 36 °, the same stable wobble signal can be obtained even when scanning a land track as when scanning a groove track. Is obtained. From this, as shown in FIG. 12, the start phases of the wobbles of the adjacent tracks are aligned at the phase matching point p once per rotation of the optical disc 1 (the phase difference of the wobble period becomes 36 ° at the maximum). I did it.) At the point where the phases are aligned (phase matching point p), the period of the constant wobble signal is disturbed. Not difficult.

FIG. 13 shows another embodiment in which the track wobbling of the optical disk is performed once per rotation, and the phases of the wobbles adjacent in the radial direction of the disk are aligned at the phase matching point p. An example is shown in which the start phases of wobbles are gradually changed when they are aligned.

The track wobbling of the optical disc 1 is
When the start phases of the wobbling of tracks adjacent in the radial direction of the disk at equal angular intervals at least once per rotation of the optical disk are made uniform, as shown in FIG. 12 or FIG. For example, when the start phases of wobbles are aligned at 10 locations during one round of the track, for example, the wobble cycle is 75
If it is μm, the phase of the wobble of the adjacent track is a phase difference of 360 ° × 7.5 μm / 75 μm / 10 = 3.6 ° at the maximum. In this manner, the wobbling start phases of tracks adjacent in the radial direction of the disk at equal angular (36 °) intervals are almost aligned from the inner circumference to the outer circumference (aligned at a wobble cycle phase difference of 3.6 °). Here, the address information of the wobble is an address indicating at least a sector number or a block number, and the cycle of the address is substantially constant in the radial direction.

As described above, the address area and the data area can be used in common, and the CLV (constant linear velocity) rotation control information and the address information can be stably obtained on both the land and the groove, so that high-density recording can be performed. .

[0038]

As described above, the optical disk of the present invention
The wobbles formed on the track are formed at both ends of the track so that a substantially constant frequency can be obtained from the inner circumference to the outer circumference when the optical disc is rotated at a constant linear velocity, and are continuously connected to one end of the track. The first formed
And a second wobble formed at the other end with a displacement amount corresponding to the address information. Therefore, when recording / reproducing data using the optical disk, the data of the optical disk is read out based on the read address information. Since the rotation control and the track position can be accurately read, data can be recorded and reproduced at a high density. Also, since the wobbles are formed at both ends of the track corresponding to the address information, when recording and reproducing data using this optical disk, the rotation control information and the address information are extremely determined from the read address information. Since data can be obtained stably, data can be recorded and reproduced at high density. Furthermore, since the tracks have the same start phase of the wobbles radially adjacent once per rotation of the optical disc, rotation control based on the wobbling frequency can be stably performed, and the Thus, precise and high-speed CLV can be performed without expensive components, and CLV rotation control can be reliably performed in both groove scanning and land scanning. Furthermore, according to the optical disk recording / reproducing apparatus and the optical disk recording / reproducing method of the present invention, data can be stably recorded at a high density on the optical disk, while data recorded at a high density on the optical disk can be stably reproduced. Further, according to the optical disk master manufacturing apparatus of the present invention, it is possible to create an optical disk master for duplicating an optical disk having the above-described effects.

[Brief description of the drawings]

FIG. 1 is a diagram for explaining a configuration of an optical disc of the present invention.

FIG. 2 is a diagram for explaining a cross section of the optical disc of the present invention.

FIG. 3 is a diagram for explaining an optical disk master manufacturing apparatus of the present invention.

FIG. 4 is a diagram for explaining operations of first and second optical deflection circuits.

FIG. 5 is a diagram for explaining an optical disk reproducing device of the present invention.

FIG. 6 is a diagram for explaining a relationship between a reproduction position of an optical disc and a reproduction waveform.

FIG. 7 is a diagram for explaining another cross section of the optical disc of the present invention.

FIG. 8 is a diagram for explaining the configuration of the optical disc of the present invention.

FIG. 9 is a diagram for explaining a relationship between a reproduction point of an optical disc and a reproduction waveform.

FIG. 10 is an enlarged view of a main part conceptually showing a conventional disk configuration.

FIG. 11 is an enlarged view of a main part conceptually showing a conventional disk configuration.

FIG. 12 is a diagram illustrating the phase adjustment of wobbles.

FIG. 13 is a diagram for explaining phase adjustment of wobbles.

[Explanation of symbols]

 1, 1a, D optical disk 2, 2a, G, Ga groove 3, 3a, L, La land A optical disk master production apparatus A4 first optical deflector (first optical deflector) A8 second optical deflector ( AD master B Optical disk reproducing device B3 Wobble detecting circuit (detecting means) B4 AM demodulating circuit (wobbling signal extracting means) B5 Address information reading circuit (address information reading means) p Phase matching point

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yasuhiro Ueki 3-12-12 Moriyacho, Kanagawa-ku, Yokohama-shi, Kanagawa Prefecture Inside of Victor Company of Japan, Ltd. (72) Inventor Hiroyuki Kurihara 3-12 Moriyacho, Kanagawa-ku, Yokohama-shi, Kanagawa Address Inside Victor Company of Japan, Ltd.

Claims (7)

[Claims] 1. An optical disk in which a track for recording data is formed by wobbling, wherein a groove width and an inter-groove width of the track are substantially constant, and the wobble rotates the optical disk at a constant linear velocity. Is formed at both ends of the track so that a substantially constant frequency is obtained from the inner circumference to the outer circumference, and
An optical disc comprising: a first wobble formed continuously at one end thereof; and a second wobble formed at the other end with a displacement corresponding to address information. 2. An optical disc in which a track for recording data is formed by wobbling, wherein a groove width and an inter-groove width of the track are substantially constant, and the wobble rotates the optical disc at a constant linear velocity. An optical disc, which is formed at both ends of the track so that a substantially constant frequency is obtained from the inner circumference to the outer circumference when corresponding to the address information. 3. The optical disk according to claim 1, wherein the address information of the wobble is at least an address indicating a sector number or a block number, and a cycle of the address is substantially equal in a radial direction. An optical disc characterized by being constant. 4. An optical disk in which a track for recording data is formed by wobbles, wherein a groove width and an inter-groove width of the track are substantially constant, and the wobble rotates the optical disk at a constant linear velocity. In this case, the track is formed so that a substantially constant frequency can be obtained from the inner circumference to the outer circumference.
An optical disc characterized in that the start phases of the wobbles adjacent in the radial direction are aligned. 5. An optical disk recording / reproducing apparatus for recording / reproducing data on / from an optical disk according to claim 1, wherein said wobble is converted from a recording / reproducing signal obtained by performing recording / reproducing scanning on an optical disk rotated at a constant linear velocity. Detecting means for detecting a corresponding wobbling signal; extracting a first wobble signal corresponding to the first wobble from the wobbling signal; and extracting the second wobbling signal from the wobbling signal using the extracted first wobble signal. Wobbling signal extracting means for extracting a second wobble signal corresponding to the wobble, and address information reading means for reading the address information based on the second wobble signal. An optical disk recording / reproducing apparatus characterized by performing: 6. An optical disk recording / reproducing method for recording / reproducing data on / from an optical disk according to claim 1, wherein the wobble is converted from a recording / reproducing signal obtained by performing recording / reproducing scanning on an optical disk rotated at a constant linear velocity. Detecting a corresponding wobbling signal, extracting a first wobble signal corresponding to the first wobble from the wobbling signal, and extracting the second wobbling signal from the wobbling signal using the extracted first wobble signal. A wobbling signal extraction procedure for extracting a second wobble signal corresponding to the wobble, and an address information reading procedure for reading the address information based on the second wobble signal. An optical disk recording / reproducing method, comprising: 7. An optical disk master manufacturing apparatus for manufacturing an optical disk master according to claim 1, wherein a synchronous wobble signal obtained by shaping a clock having a substantially constant frequency into a waveform corresponding to the first wobble. First light deflecting means for optically deflecting the laser light for exposure, and a light deflecting means for optically deflecting the laser light for exposure with an address information wobble signal obtained by modulating the address information with the clock corresponding to the second wobble. The first wobble and the second wobble on the master using the first and second light deflection exposure laser beams respectively output from the first and second light deflection means. An optical disc master manufacturing apparatus, which forms a wobble corresponding to the above.