CN101160624A - Optical recording control method, optical recording control circuit, optical reproduction control method, optical reproduction control circuit, optical recording medium, tracking control method, track - Google Patents

Abstract

It is possible to increase a transfer rate during data recording or reproduction. A predetermined number of adjacent tracks are combined into one set. Within a set of tracks, an optical beam spot (10) of a predetermined shape moves periodically. During recording, when the optical beam spot (10) moves across the center of respective tracks (11, 12, 13), power of the optical beam is controlled to be an impulse shape of a predetermined intensity so that data is recorded into a set of tracks (11, 12, 13). During reproduction, when the optical beam spot (10) moves across the center of the tracks (11, 12, 13), a reproduction signal generated by receiving a reflected light of the optical beam is sampled so as to reproduce the data recorded in the set of tracks (11, 12, 13).

Description

Optical recording control method, optical recording control circuit, optical reproduction control method, optical regeneration control circuit, optical record medium, tracing control method, Tracing Control circuit, optical recording method, optical recording apparatus, optical reproduction method and optical regeneration device

Technical field

The present invention relates to a kind of optical record medium of record data.In addition, the invention still further relates to and a kind of data are recorded in optical recording control method, optical recording control circuit, optical recording method and optical recording apparatus in the optical record medium.In addition, the invention still further relates to a kind of optical reproduction control method, optical regeneration control circuit, optical reproduction method and optical regeneration device from the optical record medium playback of data.In addition, the invention still further relates to a kind of tracing control method and Tracing Control circuit of controlling tracking.

Background technology

Optical recording media, promptly the high transfer rateization of so-called CD mainly contains two kinds of methods.A kind of is to improve the line density of record by numerical aperture, the shortening optical maser wavelength that increases object lens, thereby will write down the method for transfer rate and the raising of regenerative transmission speed.Promptly, if the linear velocity of CD is fixing value, then the diameter of the optically focused luminous point of laser more little (numerical aperture of object lens is big more or optical maser wavelength is short more) just can improve line recording density more, so just can improve the data number that writes down or regenerate in the unit interval, i.e. transfer rate.

For example, recording capacity is that line recording density, linear velocity and the transfer rate of the DVD-RAM dish of 4.7GB is respectively 3.57bit/ μ m, 8.3m/s and 22.16Mbps, and recording capacity is that line recording density, linear velocity and the transfer rate of the BD (Blu-ray Disc) of 25GB then is respectively 8.95bit/ μ m, 4.917m/s and 35.965Mbps.It is that 2.5 times, linear velocity are 0.6 times that the transfer rate of BD becomes 1.6 times of DVD-RAM dish, line density.This and the transfer rate 2.5 * 0.6=1.5 times basically identical that calculates by line density and linear velocity.

In addition, have by improving the method that linear velocity improves transfer rate as another kind of method.If the line density of record is fixing value, then Zai Sheng transfer rate and linear velocity are just proportional.For example, if the linear velocity of DVD-RAM is about one times 16.3m/s of 8.3m/s, transfer rate is 44.32Mbps just.

In addition, also open the example of flat 11-86295 number (below be called " patent documentation 1 ") just like the open communique spy of Jap.P. as the example beyond above-mentioned.A kind of optical disc apparatus is disclosed in patent documentation 1, make have a plurality of spirals (Multispiral) thus the beam spots that links on the CD of track the intercycle of helical orbit scope more than a group move and write down or regenerate.In the structure of the common optical head in this optical disc apparatus, inspection Electronic Speculum (Galvano mirror) partly is set, the beam spots on the CD is vibrated by vibration inspection Electronic Speculum at upright reflective mirror.And, the reproduced light of usually certain power is irradiated on the CD, record is to become record data to carry out by the power modulation with laser when trace signals zero crossing (Zero Cross), and regeneration is to be undertaken by sampling (Sampling) detection signal when the reflected light that detects reproduced light and trace signals are zero crossing.

And, as the method that makes the beam spots vibration on the CD, except make the method for its vibration by the inspection Electronic Speculum, also disclose by piezoelectric element and make the method for object lens vibration or the method that the light polarization element makes its vibration is set before object lens.

But, there are the following problems in aforesaid method.

At first, to improve the method that recording density improves transfer rate, that is, diminishing by the spot diameter that makes laser beam makes the method for the high transfer rateization that recording density improves, and has reached the limit.For example, to use wavelength be 0.85 object lens as the laser of 405nm and numerical aperture to BD.The words that optical maser wavelength shortened again in order to increase recording density just need ultraviolet laser, and practical application is had any problem.And will make numerical aperture also will very much not be to make difficulty than 0.85, and the installation accuracy of lens also becomes strict.And, just can not use common object lens if numerical aperture surpasses 1, but must use immersion lens (Immersion Lens) etc. to carry out near-field recording.Want to realize very difficulty.Therefore, improve recording density, that is, reached its limit by the luminous point that the makes laser beam method that improves transfer rate that diminishes.

Secondly, accelerate the method that linear velocity improves transfer rate in addition, but, this method has also reached its limit.Usually, the revolution of CD just is called as the limit about 10000rpm.For example, be example with the situation of carrying out high transfer rateization at DVD-RAM, this revolution is applied to looks at its result on the DVD-RAM.At this moment because the revolution of the DVD-RAM of 1 times of speed dish is about 3300rpm (inner periphery, the position of radius 24mm), so its transfer rate be 10000/3300=3 doubly, be 67.2Mbps.When being applied to BD, because the revolution of 1 times of fast BD is about 1956rpm, so its transfer rate is 10000/1956=5.1 times, is 183.9Mbps.Therefore, the transfer rate with the BD of limit recording density that is considered to become CD during with the 10000rpm rotation that is considered to become the limit be we can say the limit transfer rate that is almost CD.With this transfer rate with existing HDD (hard disk drive) is to compare more than the 500Mbps, the limit transfer rate of CD be its below 1/2, this is a very big problem to CD.

For such problem, former just understanding to some extent has patent documentation 1 disclosed optical disc apparatus as its a solution.Yet owing to following reason, there is the problem on realization property and the effect in patent documentation 1 disclosed CD.The first, what degree is transfer rate brought up to does not particularly have quantitative explanation.Usually, in recording medium, not record data to be kept intact carry out record, but its symbol that is transformed to the record symbol that is called as the communication line characteristic that meets recording medium is carried out record.The record symbol of CD is called as the limited symbol of length of stroke (run-length limitedencoding), is the symbol that length of stroke (on the symbol 0 continuous number) has been limited, and its frequency content is lower than original record data.This is that the communication line of record symbol and the CD big or small limited low-pass characteristic that produces because of beam spots is being matched.In BD, record symbol uses the 17pp symbol.Usually, the record of CD and regeneration are that the clock-unit with this record symbol carries out, and still, in patent documentation 1, how to carry out the processing of the clock-unit of record symbol, do not have specific description.

And even under the situation that the clock-unit that has carried out record symbol handles, the operating frequency of inspection Electronic Speculum is at most also just below 100KHz, and the clock of the record symbol of BD is 66MHz, so raising that can't look for transmissions speed.For this reason, make beam spots become problem to be solved with the method that high-frequency periodically moves.

In addition, even suppose also not reach under the situation of the bottleneck (Bottle Neck) that improves transfer rate in the frequency that above-mentioned beam spots periodically moves, as the reason of decision transfer rate, the length of recording reacting time becomes problem.DVD-RAM dish or BD adopt the phase change recording mode.This recording mode has the feature of the record data that directly record is new on the data that can formerly write down, that is, and and the rewriting of record data (Overwrite).The record reaction of this moment can be divided into elimination (crystallization) and record (decrystallized (Amorphous)) two kinds of reactions.The part of crystallization and decrystallized part are called as mark or blank, and be corresponding with the continuous part in " 1 " continuous part and " 0 " on the limited symbol of length of stroke that PWM (Pulse Width Modulation) has encoded respectively.

As previously mentioned, the record of CD is that the clock-unit with record symbol carries out, and needs at this moment clock to finish within the cycle and eliminate (crystallization) and record (decrystallized).Particularly eliminate the time, that is, the crystallization time becomes bottleneck.The ability of eliminating is represented with crystallization rate or elimination factor.Generally speaking, elimination factor is just passable about 30dB, but, the rate 30dB that wants to be eliminated when linear velocity is the 50m/s left and right sides is considered to the limit (Optical Data StorageTopical Meeting, 1997.ODS Conference Digest, 7-9 April 1997 pp98-99).

In the situation of patent documentation 1, though be to carry out record with the interval of track space, but, for example establishing parameter by BD, to make track space be 4.3 times of length on the CD of clock of record symbol, elimination factor can remain under the situation of 30dB till the 215m/s of the relative velocity to 4.3 of beam spots and CD times, want to make beam spots to be in three tracks that triangle is wavy to be moved and carry out record with the clock-unit of record symbol, the linear velocity of CD need be 12.4m/s.The displacement of the one-period of the beam spots of this moment is that 17.228 record symbol clocks are long, and the time cycle is 5.97nsec.Transfer rate is 3/ (1.5 * 5.97nsec)=335Mbps.Even it is move, still low than the transfer rate 500Mbps of present HDD at three tracks.

The second, though in patent documentation 1, regenerating unit is illustrated,, the not open specific embodiment relevant with pen recorder.Usually, just the BD equiphase does not change CD, even used one-time write (Write-Once) CD of magneto-optic disk or organic pigment etc., all belongs to the recording mode of using heat yet.In this case, the record compensation deals of hot diffusion must have been considered.Shown in patent documentation 1 allow the beam spots two dimension move forward into line item the time the record compensation deals, with common record compensation deals when allowing the beam spots one dimension move very big-difference is arranged, and it is more complicated that expectation can become, but be not specifically described in the document.

The 3rd, in patent documentation 1, there is not explanation about the position control of beam spots.That is to say, do not put down in writing the method for the position of the control bundle luminous point when writing down in a plurality of tracks that a branch of beam spots is radiated at appointment successively.And when record does not make a branch of beam spots move the data of regenerative recording in a plurality of tracks of appointment, the method for the position of control bundle luminous point.That is, during the data of regenerative recording, the track that beam spots moves during record with when regeneration the track that moves of beam spots must be identical.To compare position control more difficult for the situation of mobile beam luminous point and the situation of mobile beam luminous point one-dimensionally two-dimensionally.

Therefore, structure according to patent documentation 1 disclosed optical disc apparatus, just substantially do not improve very difficulty of transfer rate, and this installs the position control method of necessary record compensation deals or beam spots because do not relate to realization, so think that shortage realizes property.

Summary of the invention

The present invention does in order to address the above problem, its purpose is to provide the optical recording control method that can improve transfer rate, optical recording control circuit, optical reproduction control method, optical regeneration control circuit, optical record medium, tracing control method, Tracing Control circuit, optical recording method, optical recording apparatus, optical reproduction method and optical regeneration device.

Optical recording control method provided by the invention comprises, the mobile indication step that the indication light beam periodically moves with the track of appointment in the track that specifies number with adjacency is above-mentioned one group of track of one group; Indication is controlled the intensity that makes this power be pulse type when above-mentioned light beam crosses above-mentioned each track central and reach appointment to the power of above-mentioned light beam, and data are recorded in record indication step in above-mentioned one group of track.

Optical recording control circuit provided by the invention comprises, the mobile instruction unit that the indication light beam periodically moves with the track of appointment in the track that specifies number with adjacency is above-mentioned one group of track of one group; Indication is controlled the intensity that makes this power be pulse type when above-mentioned light beam crosses above-mentioned each track central and reach appointment to the power of above-mentioned light beam, and data are recorded in record instruction unit in above-mentioned one group of track.

Optical recording method provided by the invention comprises, the mobile step that light beam is periodically moved with the track of appointment in the track that specifies number with adjacency is above-mentioned one group of track of one group; The power of above-mentioned light beam is controlled the intensity that makes this power when above-mentioned light beam crosses above-mentioned each track central, be pulse type and reach appointment, and data are recorded in recording step in above-mentioned one group of track, wherein, the moving period of the above-mentioned light beam that moves in above-mentioned one group of track is consistent with 1 channel bit period of record symbol on being recorded in orbital direction.

Optical recording apparatus provided by the invention comprises, the moving part that light beam is periodically moved with the track of appointment in the track that specifies number with adjacency is above-mentioned one group of track of one group; The power of above-mentioned light beam is controlled the intensity that makes this power be pulse type when above-mentioned light beam crosses above-mentioned each track central and reach appointment, and data are recorded in recording portion in above-mentioned one group of track.

Optical reproduction control method provided by the invention comprises, the mobile indication step that the indication light beam periodically moves with the track of appointment in the track that specifies number with adjacency is above-mentioned one group of track of one group; Indication receives the regenerated signal that the reflected light of above-mentioned light beam generates when crossing above-mentioned track central at above-mentioned light beam and samples, and the regeneration of the data of regenerative recording in above-mentioned one group of track indication step, wherein, consistent in cycle of the above-mentioned light beam that moves on above-mentioned one group of track with 1 channel bit period of record symbol on being recorded in orbital direction.

Optical regeneration control circuit provided by the invention comprises, the mobile instruction unit that the indication light beam periodically moves with the track of appointment in the track that specifies number with adjacency is above-mentioned one group of track of one group; Indication receives the regenerated signal that the reflected light of above-mentioned light beam generates when crossing above-mentioned track central at above-mentioned light beam and samples, and the regeneration instruction unit of the data of regenerative recording in above-mentioned one group of track, wherein, consistent in cycle of the above-mentioned light beam that moves on above-mentioned one group of track with 1 channel bit period of record symbol on being recorded in orbital direction.

Optical reproduction method provided by the invention comprises, the mobile indication step that light beam is periodically moved with the track of appointment in the track that specifies number with adjacency is above-mentioned one group of track of one group; Receiving the regenerated signal that the reflected light of above-mentioned light beam generates when crossing above-mentioned track central at above-mentioned light beam samples, and the regeneration of the data of regenerative recording in above-mentioned one group of track indication step, wherein, consistent in cycle of the above-mentioned light beam that moves on above-mentioned one group of track with 1 channel bit period of record symbol on being recorded in orbital direction.

Optical regeneration device provided by the invention comprises, the mobile instruction unit that light beam is periodically moved with the track of appointment in the track that specifies number with adjacency is above-mentioned one group of track of one group; Receiving the regenerated signal that the reflected light of above-mentioned light beam generates when crossing above-mentioned track central at above-mentioned light beam samples, and the regeneration instruction unit of the data of regenerative recording in above-mentioned one group of track, wherein, consistent in cycle of the above-mentioned light beam that moves on above-mentioned one group of track with 1 channel bit period of record symbol on being recorded in orbital direction.

Optical record medium provided by the invention comprises, track and recording layer, and wherein, with the above-mentioned track formation group that specifies number of adjacency, two tracks of central orbit in above-mentioned one group of track or central authorities are with the amplitude and the fibrillation cycle of appointment.

Another kind of optical record medium provided by the invention comprises, track and recording layer, and wherein, with the above-mentioned track formation group that specifies number of adjacency, above-mentioned group interval of adjacency is wideer than the orbital spacing in above-mentioned group.

Another optical record medium provided by the invention comprises, track and a plurality of recording layer, and above-mentioned track has and the identical structure of above-mentioned each described optical record medium apart from the plane of incidence layer farthest of above-mentioned light beam.

Tracing control method provided by the invention comprises, is one group with the track that specifies number of adjacency, the central orbit in above-mentioned one group of track carried out the first step of Tracing Control; Central authorities with the central orbit in above-mentioned one group of track are the center, the mobile amplitude of periodically mobile above-mentioned light beam are controlled at second step of appointment size; Will above-mentioned one group of track intercycle the moving period of the above-mentioned light beam that moves be controlled at the third step of designated period; Will above-mentioned one group of track intercycle the travel(l)ing phase of the above-mentioned light beam that moves be controlled to be the 4th step of the designated phase of the assigned address in above-mentioned one group of track.

Tracing Control circuit provided by the invention comprises, is the Tracing Control portion that central orbit in above-mentioned one group of track of one group carries out Tracing Control to the track that specifies number with adjacency; Central authorities with the central orbit in above-mentioned one group of track are the center, the mobile amplitude of periodically mobile above-mentioned light beam are controlled to be the amplitude control part of appointment size; Will above-mentioned one group of track intercycle the moving period of the above-mentioned light beam that moves be controlled at the periodic Control portion of designated period; Will above-mentioned one group of track intercycle the travel(l)ing phase of the above-mentioned light beam that moves be controlled at the phase control division of the designated phase of the assigned address in above-mentioned one group of track.

Another kind of optical recording apparatus provided by the invention comprises laser instrument; With record data and track centre signal is input, the luminous power of above-mentioned laser instrument is controlled to be the laser power control circuit of pulse type; The laser beam transformation that will be penetrated by above-mentioned laser instrument is the collimation lens of directional light; Based on the refractive index control signal that is used to make laser in the track that specifies number of adjacency, periodically to move, make via the directional light of above-mentioned collimation lens conversion EO diffraction element to the radial direction refraction of optical record medium with the track of appointment; The directional light optically focused that will be reflected by above-mentioned EO diffraction element, and in optical record medium, have the object lens that form the optically focused luminous point on the track of recording layer; Reception is from the reflected light of above-mentioned optically focused luminous point, and with the tracking error testing circuit of the above-mentioned track centre signal output of the central authorities of tracking error signal and the above-mentioned track of expression; With above-mentioned tracking error signal is input, and above-mentioned refractive index control signal is outputed to the refraction control circuit of above-mentioned EO diffraction element; With above-mentioned tracking error signal is input, with the amplitude central authorities error-detector circuit of the central authorities of the amplitude after the above-mentioned tracking error signal averaging of input within the fixed period error signal output; Actuator based on the above-mentioned object lens of above-mentioned amplitude central authorities' error signal drives.

Another kind of optical regeneration device provided by the invention comprises laser instrument; The luminous power of above-mentioned laser instrument is controlled to be the laser power control circuit of designated value; The laser beam transformation that will be penetrated by above-mentioned laser instrument is the collimation lens of directional light; Based on being used to laser track with appointment in the track that specifies number of adjacency is periodically moved, and moving period that makes laser and the corresponding to refractive index control signal of 1 channel bit period that is recorded in the record symbol of orbital direction make via the directional light of the above-mentioned collimation lens conversion EO diffraction element to the radial direction refraction of optical record medium; The directional light optically focused that will be reflected by above-mentioned EO diffraction element, and in optical record medium, have the object lens that form the optically focused luminous point on the track of recording layer; Reception is from the reflected light of above-mentioned optically focused luminous point, and with the above-mentioned track centre signal of the central authorities of tracking error signal and the above-mentioned track of expression and the tracking error testing circuit of regenerated signal output; With above-mentioned tracking error signal, and above-mentioned refractive index control signal is outputed to the refraction control circuit of above-mentioned EO diffraction element; With above-mentioned tracking error signal is input, with the amplitude central authorities error-detector circuit of the central authorities of the amplitude after the above-mentioned tracking error signal averaging of input within the fixed period error signal output; Actuator based on the above-mentioned object lens of above-mentioned amplitude central authorities' error signal drives; Import above-mentioned track centre signal and above-mentioned regenerated signal, when above-mentioned track centre signal is asserted (assert), to the sampling of above-mentioned regenerated signal and with the analog-digital converter of playback of data output.

Another kind of optical recording control circuit provided by the invention comprises, is input with record data and track centre signal, the luminous power of laser instrument is controlled to be the laser power control circuit of pulse type; Reception is from the reflected light of the optically focused luminous point on the track that will have recording layer by object lens by the laser focusing that above-mentioned EO diffraction element is reflected in optical record medium, and with the tracking error testing circuit of the above-mentioned track centre signal output of the central authorities of tracking error signal and the above-mentioned track of expression; With above-mentioned tracking error signal is input, will be used to make laser to output to the refraction control circuit of above-mentioned EO diffraction element with the periodically mobile refractive index control signal of the track of appointment in the track that specifies number of adjacency; With above-mentioned tracking error signal is input, the central authorities of the amplitude after the above-mentioned tracking error signal averaging of input within the fixed period error signal is outputed to the amplitude central authorities error-detector circuit of the actuator that drives above-mentioned object lens.

Another kind of optical regeneration control circuit provided by the invention comprises, the luminous power of laser instrument is controlled to be the laser power control circuit of designated value; Reception is from the reflected light of the optically focused luminous point on the track that will have recording layer by object lens by the laser focusing that above-mentioned EO diffraction element is reflected in optical record medium, and with the above-mentioned track centre signal of tracking error signal and the above-mentioned track centre of expression and the tracking error testing circuit of regenerated signal output; With above-mentioned tracking error signal is input, to be used to make laser track with appointment in the track that specifies number of adjacency periodically to move, and the moving period that makes laser and the corresponding to refractive index control signal of 1 channel bit period that is recorded in the record symbol of orbital direction output to the refraction control circuit of above-mentioned EO diffraction element; With above-mentioned tracking error signal is input, the central authorities of the amplitude after the above-mentioned tracking error signal averaging of input within the fixed period error signal is outputed to the amplitude central authorities error-detector circuit of the actuator that drives above-mentioned object lens; With above-mentioned track centre signal and above-mentioned regenerated signal is input, when above-mentioned track centre signal is asserted, to the sampling of above-mentioned regenerated signal and with the analog-digital converter of playback of data output.

According to the present invention, the power with light beam during each track centre of the track that specifies number by crossing adjacency at light beam is controlled to be pulse type, can shorten the needed time of record data, can improve transfer rate.

Purpose of the present invention, feature and advantage will be more obvious by following detailed description and accompanying drawing.

Description of drawings

Fig. 1 is the figure that is used to illustrate optical recording method of the present invention.

Fig. 2 is the figure that is used to be described more specifically the optical recording method of Fig. 1.

Fig. 3 is the figure that is used to illustrate another kind of optical recording method of the present invention.

Fig. 4 is the figure that is used to be described more specifically the optical recording method of Fig. 3.

Fig. 5 is the figure that is used to illustrate optical reproduction method of the present invention.

Fig. 6 is the figure that is used to illustrate tracing control method of the present invention.

Fig. 7 is the figure that is used to illustrate the center control of the beam trajectory of light beam when one group of track moves.

Fig. 8 is used to illustrate that the track of light beam when a track groups moves moves the figure of the control of amplitude

Fig. 9 is the figure that is used to illustrate the control of the track moving period of light beam when a track groups moves

Figure 10 is the figure that is used to illustrate the phase control of the beam trajectory of light beam when a track groups moves.

Figure 11 is provided with pit (pit) in the central orbit that is used to illustrate in a track groups, the figure of the phase control of the beam trajectory of light beam when a track groups moves.

Figure 12 is the figure of trade shape that is used to illustrate the optical record medium of present embodiment.

Figure 13 is the figure of trade shape of optical record medium of the 3rd variation of expression present embodiment.

Figure 14 is the block scheme of structure of the optical recording/reproducing apparatus of expression present embodiment.

Figure 15 is the figure that is used to illustrate the action of EO diffraction element shown in Figure 14.

Figure 16 is the figure that is used to illustrate amplitude detecting circuit shown in Figure 14.

Figure 17 is the block scheme of the structure of expression pit phase detecting circuit shown in Figure 14.

Figure 18 is the figure of configuration of the benchmark pit of expression optical record medium.

Embodiment

Below, describe implementing most preferred embodiment of the present invention with reference to accompanying drawing.

Optical recording method involved in the present invention be the odd number track with adjacency be one group (after, this group is also referred to as track groups), one light beams this group of track intercycle move, when light beam crosses track centre, improve by the output pulses shape ground that makes light beam, data are recorded in a plurality of tracks.At this moment, in orbit moving period of light beam (after, be called track moving period) to be set to 1 channel bit (1 channel bit) of the record symbol that direction along ng a path writes down long.

Fig. 1 is the figure that is used to illustrate optical recording method of the present invention.In the example of Fig. 1, three tracks are made as one group (track groups), thereby light beam three track intercycles move data be recorded in three tracks.What the first half figure of Fig. 1 was illustrated in light beam on the recording medium moves the variation of the laser power when the latter half figure represents to write down.

In addition, thus four footmarks of Fig. 1 know 15 expressions and the power of light beam is controlled to pulse type comes the moment of record data or the moment that reproduced light is sampled.And the dot-and-dash line of Fig. 1 is represented the central authorities 11,12,13 of each track 1,2,3, and dotted line is represented the border 14 of each track 1,2,3.

Beam spots 10 is shown on the periodic track as beam spots track 16 and moves, to move along three tracks 1, track 2 and the track 3 of adjacency.In addition, as shown in Figure 1, beam spots track 16 is sinusoidal wave.

Beam spots track 16 is the center with the center 12 of track 2 to be moved between the central authorities 13 of the central authorities 11 of track 1 and track 3.At this moment, the central authorities 13 of the central authorities 11 of track 1 and track 3 become the controlled target of the position control of beam spots 10.Beam spots 10 when the central authorities 13 of the central authorities 12 of the central authorities 11 of crossing track 1 and track 2 and track 3, increases the luminous power of beam spots 10 by pulse type ground, carries out the record of data with this.Shown in second partial graph, beyond the central authorities of each track, light beam is with 17 irradiations of more weak reproducing laser power, and still, in the just in time centre of each track, light beam is with strong recording laser power 18 irradiations of very short pulse type.

The pulse height of the light beam during record is below half of value (time) after will allowing tracking error divided by the relative velocity of light beam relative orbit.That is, as establish that to allow tracking error be that the relative velocity of T, light beam and track is V, then the pulse height I of light beam can represent with following formula (1).

I≤T/2V (1)

At this, the permission distance error of the center deorbit central authorities of the light beam when allowing tracking error T for record.If the departure of light beam can be suppressed in this permission distance error, then can be used on allowed band and carry out record with interior time base error (Jitter).This value is distributed different according to the border (margin) of system, for example, be that the relative velocity V of 10nm, light beam and track is 100m/sec if allow tracking error T, and then pulse height I is 50psec just.

The data that this is recorded, be in track separately independently the record symbol with appointment be recorded.Therefore, the cycle of beam spots track 16 is 1 channel bit of record symbol, and the cycle that the luminous power of beam spots 10 is become pulse type also is 1 channel bit.

As shown in Figure 1, when going up at odd number track (among Fig. 1 being three) when mobile, it is central consistent that the track of central authorities and light beam move, and can easily detect the skew that light beam moves like this and revise, and can carry out the less record of time base error.

In addition, in Fig. 1, for convenience of description, establish the cycle that light beam moves very long, but in fact very short.Fig. 2 is the figure that is used to be described more specifically the optical recording method of Fig. 1.In Fig. 2, for example the radius of beam spots 10 is 474nm, and track space is 0.52 μ m, and 1 channel bit (T) is 121.4nm.Therefore, beam spots 10 is overlapped, and its center is near each other.

Like this, the track that specifies number of adjacency is made as one group, periodically moves with the track of appointment, when light beam crosses each track central at one group of track inner light beam, be controlled to pulse type and reach specified intensity by power, record data in one group of track light beam.

Therefore, the power with light beam during each track of the track that specifies number by crossing adjacency at light beam central is controlled to the record that pulse type carries out data, can shorten the needed time of record data, can improve transfer rate.

And, because the moving period of the light beam that in one group of track, moves, consistent with the cycle of 1 channel bit of the record symbol that is recorded in orbital direction, so by allow light beam 1 channel bit intercycle move, power with light beam when light beam crosses track centre is controlled to the record that pulse type carries out data, record data to high-density.

Further, because the beam trajectory that moves in one group of track is a sine wave shape, so amplitude, frequency and phase place by control bundle track mobile beam at an easy rate.In addition, in the present embodiment, though be that beam trajectory is controlled to be sine wave shape,, the present invention is not particularly limited in this, also beam trajectory can be controlled to be the triangular wave shape.

Below, with Fig. 1 optical reproduction method of the present invention is described.Also the same during regeneration with when record, beam spots 10 one group of track intercycle move.And when beam spots 10 was crossed track centre, the regenerated signal that the reflected light with beam spots 10 is transformed to electric signal was sampled.In view of the above, the data that independently record symbol with appointment write down in track are separately regenerated.The cycle of beam spots track 16 is 1 channel bit of record symbol, and also be 1 channel bit the sampling period of the regenerated signal that generates based on the reflected light of beam spots 10.With with above-mentioned optical recording method the luminous power pulse type ground of beam spots 10 is increased to come the just in time identical moment of record data, the regenerated signal that produces based on the reflected light of beam spots 10 is sampled.

Like this, with the contiguous track that specifies number is one group, light beam is periodically moved with the track of appointment in one group of track, and the regenerated signal that the reflected light of receiving beam when light beam crosses track centre is generated is sampled, and comes the data of regenerative recording in one group of track with this.And the cycle of the light beam that moves in one group of track is consistent with 1 channel bit period of the record symbol that is recorded in orbital direction.

Therefore, by allow light beam 1 channel bit intercycle move, the regenerating power of control bundle carries out the regeneration of data when light beam crosses track centre, can regenerative high-density ground the data of record.

And, because one group of track is to be made of the odd number track, when light beam was mobile in the odd number track, it is central consistent that central orbit and light beam move, can easily detect the skew that light beam moves like this and revise, can realize the regeneration that time base error is less.

Further, the regenerated signal that the reflected light of receiving beam generates during to the track centre beyond the two ends of crossing one group of track when light beam is sampled, the data of the track of regenerative recording beyond the two ends of one group of track.Therefore, the straight line portion that can move with light beam is promptly regenerated with the most stable part of the track of light beam, therefore can reduce the regeneration time base error.

Below, another kind of optical recording method of the present invention is described.Fig. 3 is the figure that is used to illustrate another kind of optical recording method of the present invention.In the example of Fig. 3, be one group with five tracks, light beam five track intercycles move, in three tracks record data or from three tracks playback of data.What the first half figure among Fig. 3 was illustrated in light beam on the recording medium moves the variation of the laser power when the latter half figure represents to write down.

In addition, four footmarks of Fig. 3 are known 15 expressions and the power of light beam is controlled to be pulse type is carried out the moment of data recording or the moment that reproduced light is sampled.The moment of the triangle sign 20 expression sampling reproduced lights of Fig. 3.The dot-and-dash line of Fig. 3 is represented the central authorities 11,12,13,21,22 of each track 1,2,3,4,5, and dotted line is represented the border 14 of each track 1,2,3,4,5.

Beam spots 10 shown in beam spots track 16, moves on periodic track, moves in track 1, track 2, track 3, track 4 and track 5 these five tracks of adjacency.In addition, as shown in Figure 3, beam spots track 16 is sinusoidal wave.

To be the center with the center 12 of track 2 move between the central authorities 22 of the central authorities 21 of track 4 and track 5 beam spots track 16.At this moment, the central authorities 22 of the central authorities 21 of track 4 and track 5 become the controlled target of the position control of beam spots 10.Beam spots 10 increases the record that carries out data by the luminous power pulse type ground that makes beam spots 10 when the central authorities 13 of the central authorities 12 of the central authorities 11 of crossing track 1 and track 2 and track 3.Shown in second partial graph, beyond the central authorities of track 1,2,3, light beam is with 17 irradiations of more weak reproducing laser power, and still, in the just in time centre of track 1,2,3, light beam is with strong recording laser power 18 irradiations of very short pulse type.In addition, the pulse height of the light beam during record is same as described above.

The data that this is recorded, be in track separately independently the record symbol with appointment be recorded.Therefore, the cycle of beam spots track 16 is 1 channel bit of record symbol, and the cycle that makes the luminous power of beam spots 10 become pulse type also is 1 channel bit.

In addition, in the example of Fig. 3, in 90 degree phase places to the 270 degree phase range in cycle of beam spots track 16, carry out record, and in 270 degree phase places to 90 degree phase range, regenerate.That is, in 270 degree phase place to 90 degree phase range, the power of beam spots 10 is controlled as regenerating power, is transformed to regenerated signal after the reflected light of beam spots 10 is received.And, during the central authorities 13 of the central authorities 11 by crossing track 1 in beam spots 10 and the central authorities 12 of track 2 and track 3 regenerated signal is sampled, can the data of regenerative recording in 90 degree phase places to 270 degree phase range.

Therefore, by the signal of in 270 degree phase places to 90 degree phase range of the moving period of light beam, regenerating, be recorded in the data in 90 degree phase place to the 270 degree phase range, handle by the balanced appropriate signals such as (Partial Response Equalization) of part response and can confirm that it has the track of appointment.Like this, by in one-period, writing down and regenerate, calibration tails data in real time (mark and blank), thus can improve the confidence level of record.

In addition, in Fig. 3, for convenience of description, establish the cycle that light beam moves long, but in fact very short.Fig. 4 is the figure that is used to be described more specifically the optical recording method of Fig. 3.In Fig. 4, for example the radius of beam spots 10 is that 474nm, track space are that 0.52 μ m, 1 channel bit (T) are 121.4nm.Therefore, beam spots 10 is overlapped, and its center is approaching.Therefore, recorded data in 90 degree phase place to 270 degree phase range can be regenerated in 270 degree phase place to 90 degree phase range.

In addition, be with the difference of the optical recording method of Fig. 1, the track of the peak valley part of beam spots track 16, i.e. record data not in the track at two ends in one group of track, but in the track except two ends record data.Can write down and regenerate at one-period thus.And the linear velocity the when beam spots 10 on track 4 and the track 5 and the linear velocity of recording layer are crossed the central authorities 13 of the central authorities 12 of the central authorities 11 of track 1 and track 2 and track 3 than beam spots 10 is slow significantly.Therefore, the influence that the record in track 4 and the track 5 is subjected to the linear velocity change is very big, realizes the difficulty height of stable record.Yet, because the linear velocity of beam spots 10 when crossing the central authorities 13 of the central authorities 12 of the central authorities 11 of track 1 and track 2 and track 3 is roughly the same, so can easily carry out stable record.

In addition, it is also passable to carry out twice record in the scope of 90 degree phase places to 270 degree phase places and in the scope of 270 degree phase places to 90 degree phase places.By in one-period (in the record symbol bit) carry out record twice, can carry out more accurate record.

In addition, in the present embodiment, when record data, in 90 degree phase place to 270 degree phase range, carry out the record of data, in 270 degree phase place to 90 degree phase range, carry out the regeneration of data, still, the present invention is not defined in this especially, when playback of data, in 90 degree phase place to 270 degree phase range, carry out the regeneration of data, the regeneration of carrying out a secondary data in 270 degree phase place to 90 degree phase range again is also passable.

Fig. 5 is the figure that is used to illustrate another optical reproduction method of the present invention.In Fig. 5, expression is one group with five tracks, and light beam moves the example that data are regenerated from three tracks on five track intercycles ground.

Beam spots 10 shown in beam spots track 16, moves on periodic track, moves with regenerating power in track 1, track 2, track 3, track 4 and track 5 these five tracks of adjacency.In addition, as shown in Figure 5, beam spots track 16 is sinusoidal wave.

Beam spots track 16 is the center with the center 12 of track 2 to be moved between the central authorities 22 of the central authorities 21 of track 4 and track 5, and the central authorities 21 of track 4 and the central authorities 22 of track 5 become the controlled target of the position control of beam spots 10.And the cycle of beam spots track 16 is 1 channel bit of record symbol.Reflected light from beam spots 10 is transformed to regenerated signal by the sensor reception.

Triangle among Fig. 5 sign X1 and inverse trigonometric sign X2 represent moment that regenerated signal is sampled.When beam spots 10 is crossed the central authorities 13 of the central authorities 12 of the central authorities 11 of track 1 and track 2 and track 3, by the data of regenerative recording in track 1 and track 2 and track 3 that regenerated signal is sampled.

And, in the example of Fig. 5, in the scope of 90 degree phase places to the 270 degree phase places in cycle of beam spots track 16, the regenerated signal of track 1 and track 2 and track 3 is sampled, in the scope of 270 degree phase places to 90 degree phase places, the regenerated signal of track 1 and track 2 and track 3 is sampled again.That is, the regenerated signal of each track has been carried out twice sampling in 90 degree to the scope of the phase range of 270 degree and 270 degree phase places to 90 degree phase places.Like this, by in 1 channel bit, regenerated signal being carried out multiple sampling, can improve the confidence level of regeneration.

Below, tracing control method of the present invention is described.Fig. 6 is the figure of explanation tracing control method of the present invention, Fig. 6 (a) is the figure of the first step of expression tracing control method, Fig. 6 (b) is the figure of second step of expression tracing control method, Fig. 6 (c) is the figure of the third step of expression tracing control method, and Fig. 6 (d) is the figure of the 4th step of expression tracing control method.In addition, in (d), same as in figure 1 at Fig. 6 (a), be one group with three tracks.

In the first step shown in Fig. 6 (a), beam spots 10 is static on the vertical direction of track, and the central orbit 2 of one group of track is carried out the Tracing Control the same with common CD.If at first step, departure is converged in the designated value, then carries out the amplitude control of second step in the Tracing Control of carrying out first step.

In second step shown in Fig. 6 (b), the amplitude of fluctuation of control bundle luminous point 10 (after, be called track and move amplitude), beam spots 10 is periodically moved on track 1, track 2 and track 3, that is, carry out amplitude control.In this example, carry out amplitude control, the track that makes beam spots 10 is a sine wave shape.The controlled target of this moment is the central authorities 11 of track 1 and the central authorities 14 of track 3.The track of control bundle luminous point 10 makes its crest by the central authorities of track 1, the central authorities that trough passes through track 3.And, because the Tracing Control of first step also carrying out simultaneously, thus beam spots 10 with central orbit 2 be the center three track intercycles move.

In the third step shown in Fig. 6 (c), be controlled at the cycle (frequency) of moving in one group of track (in the example of figure being three).In optical recording method of the present invention, data are recorded in respectively in separately the track independently by the record symbol with appointment.In the cycle that beam spots 10 moves in one group of track, the length that is controlled so as to 1 channel bit on the record symbol therewith is identical.

In the 4th step shown in Fig. 6 (d), though the cycle that beam spots 10 moves in one group of track is identical with third step,, the designated phase of the assigned address shown in being controlled in orbit in advance.

Like this, with the track that specifies number of adjacency as one group, track to the central authorities in one group of track carries out Tracing Control, and is the center with the central authorities of the track of the central authorities in one group of track, the mobile amplitude of the light beam that periodically moves is controlled to the size of appointment.And, one group of track intercycle the moving period of the light beam that moves be controlled as cycle of appointment, one group of track intercycle the travel(l)ing phase of the light beam that moves be controlled in the designated phase of one group of assigned address in the track.

Therefore, owing at first allow light beam in the central orbit of one group of track, follow the trail of, secondly, the amplitude of control bundle, then, in the cycle that control bundle moves, then, therefore the phase place of control bundle, can make light beam be sinusoidal wave shape and move.

Below, the processing of first step to the four steps is described in more details.

In second step, the center of light beam beam trajectory when mobile in one group of track is controlled.When light beam is positioned at centre position (neutral position), promptly, by the tracking error signal under 0 degree phase place identical with the control position of first step and the 180 degree phase places is sampled, detect light beam one group of track intercycle the error between the track (below, be called central orbit) of the center of the track that moves and the central authorities in one group of track.Then, control bundle make its one group of track intercycle the center of the track that moves consistent with central orbit.

In addition, in second step, also can be by the tracking error signal is carried out integration with the time constant of appointment, the position of the light beam after detecting on average, promptly, light beam one group of track intercycle the center of the track that moves and the error between central orbit, and control make light beam one group of track intercycle the center of the track that moves consistent with central orbit.

Fig. 7 is the figure that is used to illustrate the center control of the beam trajectory when mobile in one group of track of relevant light beam.The track and the tracking error signal of the light beam when depart from the center that Fig. 7 is illustrated in the beam trajectory when mobile on the track groups.Fig. 7 (a) is that expression is as the figure of light beam when depart from the top of figure, Fig. 7 (b) is the figure of expression when track center that light beam moves is just in time in central orbit, Fig. 7 (c) is that expression is as the figure of light beam when depart from the below of figure, the first half of each figure is represented beam trajectory, and the latter half is represented the tracking error signal.

Shown in Fig. 7 (b), beam trajectory 40 is center when moving with central orbit 43, and the preceding semiperiod of beam trajectory 40 and the tracking error signal in later half cycle are that the center is symmetrical with 0V.And, as Fig. 7 (a) and (c), when the center of beam trajectory 40 when central orbit 43 departs from, the preceding semiperiod of beam trajectory 40 is identical with the tracking error signal in later half cycle.

Therefore, if the tracking error signal of the one-period of beam trajectory 40 is carried out integration, beam trajectory 40 is that the integrated value of center when moving then is 0 with central orbit 43, and its integrated value then is the value except that 0 when beam trajectory 40 and central orbit 43 depart from.The tracking error signal of proper period is carried out signal behind the integration, can be used as with the corresponding side-play amount in center of light beam beam trajectory 40 when mobile and be detected, thereby the center that can be controlled to beam trajectory 40 is consistent with central orbit 43 on one group of track intercycle ground.And, the 0 degree phase place of beam trajectory 40 and the tracking error signals of 180 degree phase places also can be used as with the corresponding side-play amount in center of light beam beam trajectory 40 when periodically mobile on a track groups and are detected, thereby the center that can be controlled to beam trajectory 40 is consistent with central orbit 43.

Like this, with one group of track intercycle the tracking error signal of the 0 degree phase place of moving period of the light beam that moves and 180 degree phase places detect with the skew at the center of periodically moving of light beam as the central authorities of the central orbit in one group of track, thereby the center of moving of carrying out light beam is controlled.

Therefore, the 0 degree phase place and the 180 degree phase places of the moving period by detecting light beam, promptly, tracking error signal when light beam passes through central orbit, can detect the skew at the center of periodically moving of central orbit and light beam, can be the center of the moving control that light beam is carried out on the basis with this tracking error signal.

And, carried out the tracking error signal of integration with the reasonable time constant, be detected as the skew at the center of periodically moving of the central authorities of the central orbit in one group of track and light beam, thereby carry out the center of the moving control of light beam.Therefore, by the tracking error signal is carried out integration with the reasonable time constant, the position of the light beam after can detecting on average, promptly, light beam one group of track intercycle the center of the track that moves and the error of central orbit, thereby can be controlled to light beam one group of track intercycle the center of the track that moves consistent with central orbit.

Further, in second step, light beam track when mobile on a track groups is moved amplitude control.That is, light beam one group of track intercycle in the one-period that moves, the crest value number on the tracking error signal is counted, and the control amplitude to make the crest value number of meter be the number of appointment.With the target amplitude is the center, if in the amplitude of appointment, then the crest value number of tracking error signal is just fixing.For this reason, in the stage of rough amplitude control, control increases amplitude if the crest value number just lacks than designation number, and control reduces amplitude if the crest value number just manys than designation number, can control amplitude roughly like this.

And, light beam one group of track intercycle in the one-period that moves, by carrying out amplitude control, make when amplitude is maximum, promptly, tracking error aligned phase signal when tracking error signal during 90 degree phase places and 270 degree phase places, thus may be controlled to the central authorities that light beam crosses the outermost track.

Fig. 8 is used to illustrate that light beam track when mobile on a track groups moves the figure of the control of amplitude.In Fig. 8, the oscillation amplitude change of the beam trajectory of expression light beam when to be the center with the central orbit on track intercycle ground up and down mobile and the relation of tracking error signal.Fig. 8 (a) is the figure of the tracking error signal of expression amplitude penlight track when not arriving the state of outer side track, Fig. 8 (b) is the figure of the tracking error signal of expression beam trajectory when just in time arriving the state of outer side track, and Fig. 8 (c) is the figure of the tracking error signal of the big beam trajectory of expression amplitude when having surpassed the state of outer side track.

Shown in Fig. 8 (a), when amplitude ratio outer side track 44 hours, the crest of the tracking error signal in the one-period and the number of trough were 6.And shown in Fig. 8 (b), when amplitude equated just with outer side track 44, the crest of the tracking error signal in the one-period and the number of trough were 10.And shown in Fig. 8 (c), when amplitude ratio outer side track 44 was big, the crest of the tracking error signal in the one-period and the number of trough were 10.Therefore, make the crest of tracking error signal and the number of trough become 10 by carrying out amplitude control, can be with Beam Control for crossing the central authorities of outermost track.

And, shown in Fig. 8 (b), light beam one group of track intercycle in the one-period that moves, the level (Level) of the tracking error signal the when level (Level) of the tracking error signal when making 90 degree phase places by carrying out amplitude control is spent phase places with 270 is consistent at the 0V place, can be with Beam Control for crossing the central authorities of outermost track.

Further, also carry out the control of light beam mobile track moving period on a track groups at third step.Light beam one group of track intercycle of the central orbit of vibration in the one-period that moves, tracking error signal when tracking error signal during for example to 0 degree phase place and 180 degree phase places is sampled, detect the vibration and the generation dither signal of the central orbit of a track groups, by multiplication dither signal generator orbital moving reference signal.And, when crest that at every turn detects the tracking error signal and trough, generate the peak valley detection signal that overturns, by peak valley detection signal frequency division is generated fractional frequency signal.Then, compare by cycle and to detect error, carry out the periodic Control of the track of light beam cycle of track moving reference signal and fractional frequency signal.

And, also can be by light beam tracking error signal when mobile in one group of track is carried out integration with the time constant of appointment, detect the vibration and the generation dither signal of the central orbit of a track groups, by multiplication dither signal generator orbital moving reference signal.At this moment, also be the peak valley detection signal that when crest that at every turn detects the tracking error signal and trough, generates upset, by peak valley detection signal frequency division is generated fractional frequency signal.Then, compare by cycle and to detect error, carry out the periodic Control of beam trajectory cycle of track moving reference signal and fractional frequency signal.

In addition, the cycle of light beam mobile appointment in one group of track is consistent with 1 channel bit period of the record symbol that is recorded in each orbital direction.Therefore, by the frequency of comparison track moving reference signal and the frequency of fractional frequency signal, the periodic Control that light beam can be moved in one group of track be 1 channel bit period that is recorded in the record symbol of each orbital direction.

Fig. 9 is the figure that is used to illustrate light beam control of the track moving period when mobile on a track groups.In Fig. 9, the expression light beam with the central orbit 60 of vibration be the center about outer side track 44 on the control method of track moving period when periodically mobile.In Fig. 9 (a), be one group with three tracks, light beam is sinusoidal wave shape and moves in three tracks.And the central orbit 60 in three tracks is with the fibrillation cycle of appointment.Control method to track moving period at this moment describes below.

Fig. 9 (b) is the figure of expression light beam tracking error signal of mobile time acquisition the track shown in Fig. 9 (a) in.At first, the crest of tracking error signal 41 and trough are detected.Fig. 9 (c) produces the detection pulse of designated length when being illustrated in the crest that at every turn detects tracking error signal 41 or trough and the figure of the peak valley detection signal 61 that generates.By with this peak valley detection signal 61 with designation number frequency division (this moment be 5 frequency divisions), can obtain the fractional frequency signal 62 of Fig. 9 (d).This fractional frequency signal 62 is equivalent to the periodic signal of light beam.

And, by the tracking error signal 41 shown in Fig. 9 (b) being sampled, can obtain the degree of 0 shown in Fig. 9 (f) 180 degree sampled signals 65 in the 0 degree phase place of the track moving period of light beam and the moment of 180 degree phase places.The vibration cycle of the central orbit 60 of these 0 degree, 180 degree sampled signals, 65 expression vibrations.At this moment, the vibration cycle is 3 times of track moving period.Therefore, by 0 degree, 180 degree sampled signals 65 are increased by 3 times, can generate the track moving reference signal 66 shown in Fig. 9 (e).

By the frequency of this track moving reference signal 66 of comparison and the frequency of fractional frequency signal 62, the periodic Control that light beam can be moved on a track groups be 1 channel bit period that is recorded in the record symbol of each orbital direction.

In addition, even tracking error signal 41 is not sampled in the phase place of appointment, the integrating circuit that has the reasonable time constant by utilization carries out integration, also can generate same track moving reference signal, the track moving period that utilizes this track moving reference signal also can control bundle on a track groups, to move.

In the 4th step, carry out phase control to light beam beam trajectory when mobile on a track groups.Promptly, the phase place of the appointment of the track moving period of light beam, for example during phase place and during 180 degree phase places the tracking error signal is sampled at 0 degree, detect a track groups central orbit vibration and generate dither signal, by multiplication dither signal generator orbital moving reference signal.And, when detecting the crest value of tracking error signal, generate the peak valley detection signal that overturns, by peak valley detection signal frequency division is generated fractional frequency signal at every turn.Go out error by the phase place of comparison track moving reference signal and the phase-detection of fractional frequency signal, carry out the phase control of the track of light beam.Therefore, compare, suitably the phase place that in one group of track, moves of control bundle by phase place and fractional frequency signal phase place to track moving reference signal.

And, also can be by light beam tracking error signal when mobile on a track groups is carried out integration with the time constant of appointment, detect the vibration and the generation dither signal of the central orbit of track groups, by multiplication dither signal generator orbital moving reference signal.At this moment, when detecting the crest value of tracking error signal, generate the peak valley detection signal of upset, by peak valley detection signal frequency division is generated fractional frequency signal at every turn.Go out error by the phase place of comparison track moving reference signal and the phase-detection of fractional frequency signal, carry out the phase control of the track of light beam.Therefore, even the tracking error signal is not sampled in the phase place of appointment, by carrying out integration, also can generate same track moving reference signal, the phase place of utilizing this track moving reference signal also can control bundle in one group of track, to move with the reasonable time constant.

In addition, in the track separately of two tracks in the outside of one group of track, in the N+0.5 of the channel bit period that the staggers position of (N is an integer) doubly, utilize PPM (Pit Position Modulation) coding to be pre-formed the reference phase pit, the crest value of the regenerated signal when crossing two reference phase pits by allowing and track move amplitude to become the maximum moment consistent, and the phase control of carrying out beam trajectory is also passable.

Figure 10 is the figure that is used to illustrate light beam phase control of the track of the light beam when mobile on a track groups.In Figure 10, illustrated to detect on outer side track 44 pit 70,71 with the PPM encoded recording, thus the method for the phase place that control bundle periodically moves on a track groups.

The figure of Figure 10 (a) the first half is the figure of the phase place of the phase place that moves in orbit of expression light beam and pit 70 and pit 71 when matching.Light beam 10 is the center with central orbit 43, periodically moves at central orbit 43 and 44 of outer side tracks with the amplitude and the specified frequency of appointment.When light beam arrived on outer side track 44 in advance with the pit 70 of the phase recording of appointment or pit 71, the amplitude on the regenerated signal (second figure of Figure 10 (a) the first half) increased.These two phase places that are recorded in the pit 70,71 in the outer side track 44 stagger the N+0.5 cycle mutually with track moving period.That is, because the track moving period of light beam is consistent with the cycle of the channel bit of orbital direction, so also we can say the phase place of pit 70, the 71 N+0.5 channel bit that staggers mutually.

The crest value of regenerated signal (the 3rd figure of Figure 10 (a) the first half) is detected, and the track moving period of light beam and the crest value of regenerated signal are carried out bit comparison mutually.In Figure 10 (a), the crest periodic signal (the 4th and the 5th figure of Figure 10 (a) the first half) in the cycle of the trough periodic signal in the cycle of the trough part of the track that the expression light beam moves in orbit and expression crest part is generated, carried out bit comparison mutually from the crest value of the regenerated signal of detected pit 70 parts of regenerated signal with the crest periodic signal, the crest value of the regenerated signal of pit 71 parts is carried out bit comparison mutually with the trough periodic signal, and mobile in orbit phase place is controlled thereby phase error is detected light beam.

Situation when Figure 10 (b) is the position deviation of the phase place that moves in orbit of expression light beam and pit 70, pit 71.In Figure 10 (b), the phase place of the crest value on the regenerated signal staggers mutually with the phase place of trough periodic signal and the phase place of crest periodic signal.Therefore, can detect the amount of staggering, the phase place that control bundle moves in orbit is controlled so as to the phase place of the control signal that light beam moves in orbit and phase deviation do not occur.

Therefore, the moment of the crest value by 70,71 o'clock the regenerated signal of outside reference phase pit that light beam is transverse in form in the two ends track of one group of track and the peak swing of light beam is consistent, and can carry out suitable control to the phase place that light beam moves.

And, can also be in the appointed positions of the central orbit in one group of track, for example be pre-formed the reference phase pit in the centre position of above-mentioned two reference phase pits with the PPM coding, periodically the moment of the zero amplitude of mobile track is consistent and carries out phase control for the crest value of the regenerated signal when making the reference phase pit that crosses central orbit and light beam.

Figure 11 is provided with pit in the central orbit that is used to illustrate in a track groups, the figure of light beam phase control of the track of the light beam when mobile on a track groups.In Figure 11, expression detect on central orbit 43 with the pit 80 of PPM encoded recording and to light beam one group of track intercycle the phase place that moves carry out the method for phase control.

Figure when the figure of Figure 11 (a) the first half is consistent with the phase place of pit 80.Light beam 10 is the center with central orbit 43, and is periodically mobile at central orbit 43 and 44 of outer side tracks with amplitude, the specified frequency of appointment.When light beam arrived on central orbit 43 in advance pit 80 with the phase recording of appointment, the amplitude on the regenerated signal (second figure of Figure 11 (a) the first half) increased.This phase place that is recorded in the pit 80 on this central orbit 43 becomes the benchmark of the 180 degree phase places in the cycle of moving in orbit.And the phase place of pit 80 also becomes the reference phase of the channel bit of orbital direction.

The crest value of regenerated signal (the 3rd figure of Figure 11 (a) the first half) is detected, and the track moving period of light beam and the crest value of regenerated signal are carried out bit comparison mutually.In Figure 11 (a), 180 degree phase cycling signals (the 4th figure of Figure 11 (a) the first half) of 180 degree phase bit positions of the track that the expression light beam moves in orbit are generated, carried out bit comparison mutually from the crest value of the regenerated signal of detected pit 80 parts of regenerated signal with 180 phase cycling signals, phase error is detected, the phase place Be Controlled of track moving period.

Figure 11 (b) is the situation of the phase place of track moving period of expression light beam when departing from mutually with the position of pit 80.In Figure 11 (b), the phase place of the crest value on the regenerated signal departs from mutually with the phase place of 180 degree phase cycling signals.Therefore, can detect bias, the phase place of the track moving period of control bundle is controlled so as to the phase place of the control signal that light beam moves in orbit and phase deviation do not occur.

Therefore, the 0 degree phase place of the crest value of the regenerated signal when making light beam be transverse in the central reference phase pit 80 that forms in one group of central orbit in the track and the moving period of light beam or the moment of 180 degree phase places are consistent, and can carry out suitable control to the phase place that moves of light beam.

In addition, in first step, also can be, central orbit in one group of track is carried out Tracing Control, under departure is converged in state in the scope in appointment, detect vibration cycle and phase place or be recorded in the cycle and the phase place of the central reference phase pit 80 of central orbit, based on the cycle and the phase place of detected vibration cycle and phase place or central reference phase pit 80, the track that generates the initial stage of step 2 moves control signal.

At this moment, when central orbit 43 is trembleing or, when in the central orbit 43 shown in Figure 11 (a), writing down central reference phase pit 80, the track of phase place that generation is used for the track moving period of control bundle moves control signal, this track is moved the frequency of control signal and phase place and vibration or central reference phase pit 80 to align, initial stage signal when it is controlled as the amplitude in second step uses, and can seek the shortening in control time.

Below, the structure of the optical record medium of present embodiment is described.Figure 12 (a) is the figure of trade shape of the optical record medium of expression present embodiment.These tracks have photon mode (Photon Mode) recording layer, be converted to the phase transformation one-time write recording layer (Write OnceRecording Layer) of noncrystalline (Crystalline-to-Amorphous), perhaps pigment one-time write recording layer by crystallization.It is different that photon mode recording layer and photomagneto disk or phase transformation can rewrite heat record such as (Rewritable) dish, the variable quantity of the optical constant of recording materials is almost the function of the intensity of writing light beam, if use the light beam of very strong intensity to carry out record, record will finish in the very short time.The time of the record reaction of photon mode recording layer itself is called as picosecond (Picosecond Order) (Japanese optics meeting magazine " optics ", No. 7,26 volumes, 1997,356pp, the optical memory of use photochromic molecule (Photochromic Molecule) material).For example, if use high output picosecond laser etc., also be possible with the record of a light pulse, so can carry out the record of picosecond.Phase transformation one-time write recording layer too, the time that is converted to amorphous by crystallization is below the picosecond, can replace the photon mode recording layer with phase transformation one-time write recording layer in following embodiment.And, because pigment one-time write recording layer also has same high speed reaction, so also can replace.

And, may have the recording materials that are linear function or quadratic function with the intensity of writing light beam in the photon mode record.The variable quantity of the optical constant of recording materials is that the record of linear function of the intensity of writing light beam is called as 1 photonic absorption record, and the variable quantity of the optical constant of recording materials is that the record of quadratic function of the intensity of writing light beam is called as 2 photonic absorption records.As the example of such recording materials, fulgide (Fulgide) is arranged, diarylethene (Diarylethene) and PAP (Photoaddresable Polymers) etc., they can carry out 1 photonic absorption record also can carry out 2 photonic absorption records.These all are to write down by a kind of change of refractive as optical constant.

Shown in the A-A ' cut-open view of Figure 12 (a), be formed with the rail groove that is used to follow the trail of at the center of track.And adjacent odd number (in this example being three) track becomes one group, the groove vibration of central orbit 90, and the groove of the track 91 at two ends is linearly.After, the group of these tracks is called track groups.In addition, in Figure 12, though the amplitude of vibration is expressed as about half of track space,, this just increases it for convenience of explanation, is actually 1/10 below of track space (after, represent equally).This vibration cycle 92 is the integral multiple in beam spots cycle of periodically moving on track groups.And beam spots is identical with 1 channel bit on the record symbol in orbital direction in the cycle of periodically moving on the track groups.For this reason, we can say that also the vibration cycle 92 is the integral multiple of channel bit.Even also be the same in this relation example afterwards.In addition, though expression has three track groups in Figure 12 (a), beat frequency and phase place are all identical on three track groups, and the present invention is not particularly limited in this, and the beat frequency of each group and phase place also can be different.

Like this, because the integral multiple in the cycle that the vibration cycle of groove track is a light beam moves in one group of groove track, so the cycle that can utilize vibration cycle control bundle to move.

And, because the vibration cycle of groove track be the integral multiple of 1 channel bit of the record symbol of light beam record in groove track, so, by the cycle that makes light beam be 1 channel bit, can utilize the moving period of vibration cycle control bundle.

Figure 12 (b) is the figure of trade shape of optical record medium of first variation of expression present embodiment.Shown in the A-A ' cut-open view of Figure 12 (b), be formed with the rail groove that is used to follow the trail of at the center of track.And adjacent even number (be four this moment) track becomes one group, the groove vibration of two central orbits 90 of central authorities, and the track 91 at two ends is linearly.The beat frequency and the phase place of these two rail grooves are identical.In addition, though expression has three track groups in Figure 12 (b), beat frequency and phase place are all identical three track groups,, the present invention is not particularly limited in this, and the beat frequency of each group and phase place also can be different.

Like this, with the groove track formation group that specifies number of adjacency, because two tracks of central orbit in one group of groove track or central authorities are with the amplitude and the fibrillation cycle of appointment, so can utilize moving of dither signal control bundle.

And, because the groove track at one group of groove track two ends is linearly, groove track vibration beyond one group of groove track two ends so the groove track at one group of groove track two ends can be used as the controlled target of light beam, is used the groove track beyond the two ends as the center that the periodicity of light beam moves.

Figure 12 (c) is the figure of trade shape of optical record medium of second variation of expression present embodiment.Shown in the A-A ' cut-open view of Figure 12 (c), be formed with the rail groove that is used to follow the trail of at the center of track.And adjacent odd number (be three this moment) track becomes one group, the groove vibration of a central orbit 90 of central authorities, and two ends track 91 is linearly.The beat frequency of this rail groove and phase place are the same.And the interval of the track groups of adjacency is configured to wideer than the orbital spacing in the track groups.In addition, though expression has three track groups in Figure 12 (c), beat frequency and phase place are all identical three track groups, and the present invention is not particularly limited in this, and the beat frequency of each group and phase place also can be different.

Like this,,, move in the track of adjacent set, can make light beam moving reliably in one group of track so can prevent the light beam mistake because the orbital spacing in the ratio group of the interval of contiguous set is wide with the groove track formation group that specifies number of adjacency.

Figure 13 is the figure of trade shape of optical record medium of the 3rd variation of expression present embodiment.Shown in the A-A ' cut-open view of Figure 13, be formed with the rail groove that is used to follow the trail of at the center of track.Adjacent a plurality of (be three this moment) track is one group, the groove vibration of the central orbit 90 of central authorities, and the groove of the track 91 at two ends is formed linearity.In the outer side track 91 at the two ends of one group of track, record pit 70 and pit 71 in advance.That is, in one of them track of the track 91 at two ends, form pit 70, and in another track, form pit 71.These pit 70,71 also available embossments (Emboss) carry out record.Distance between these two pits 70 and the pit 71 is N+0.5 a times of channel bit.And simultaneously, N+0.5 times of this distance also be light beam on this track groups cycle when periodically mobile.The beat frequency of this central orbit groove and phase place are the same.

Like this, because the N+0.5 cycle (N is an integer) with the channel bit period that staggers mutually in the track at the two ends of one group of groove track forms the reference phase pit, so when light beam is sine wave shape and moves, partly be controlled to be by peak valley beam trajectory consistent with the reference phase pit, the phase place of control bundle easily just.

In addition, the optical record medium of present embodiment also can be for having a plurality of recording layers and a multiplayer optical disk of following the trail of layer, plane of incidence layer farthest apart from light beam is to follow the trail of layer, and the structure of following the trail of the groove of layer also can be Figure 12 (a)-(c) and groove structure shown in Figure 13.At this moment, in having the optical record medium of a plurality of recording layers, also can adopt the structure of above-mentioned groove track.

Figure 14 is the block scheme of structure of the optical recording/reproducing apparatus of expression present embodiment.In Figure 14, the box indicating of representing with round rectangle constitutes the square frame that reflects control circuit.

Be imported into laser power control circuit 111 from the record data of outside input.Laser power control circuit 111 is according to the luminous power of the record data control laser instrument 110 of input.When record, laser power control circuit 111, the power of control bundle make it be pulse type when light beam crosses each track centre and are the intensity of appointment, and indication is recorded in data in one group of track.In addition, in when regeneration, the reflected light of 111 pairs of receiving beams when light beam crosses track centre of laser power control circuit and the regenerated signal that generates is sampled, and the data of indication regenerative recording in one group of track.

In addition, the optical recording/reproducing apparatus of present embodiment comprises that the Laser Driven portion of drive laser 110 is also passable.At this moment, laser power control circuit 111 is to Laser Driven portion the output indication of record data or the indication of the data of regenerative recording in one group of track in one group of track, and Laser Driven portion is based on the luminous moment or the power of being regulated laser instrument 110 by the indication of laser power control circuit 111 outputs.

The laser that penetrates from laser instrument 110 is transformed to directional light via collimation lens 112.Be transformed to the laser of directional light, inject EO (electric-optics) refracting element 114 by beam splitter 113.

EO diffraction element 114 for example can consider to use the lithium niobate (LiNbO of Pockels effect (Pockels Effect) ₃) crystallization or KTN crystallization (KTa _1-XNb _XO ₃) etc.The effect that its refractive index changed when Pockels effect was meant on electric field being added to oxide crystallizations such as KTN crystallization.Figure 15 is the figure that is used to illustrate the action of EO diffraction element 114 shown in Figure 14.To shown in Figure 15 (a), carry out with two triangular prisms, the oxidizing and crystallizing triangular prism 120 that oxide crystallizations such as KTN crystallization make bonding, thereon below setting can apply the plane electrode 121 of electric field to prism.When not applying voltage, the light of incident advances straight in EO diffraction element 114 and directly penetrates from EO diffraction element 114.Shown in Figure 15 (a), if apply the identical and mutually different voltage of polarity of voltage in the plane electrode 121 of two prisms, the refractive index of two prisms will change to mutually opposite direction.Its result, incident light reflects at the boundary of two prisms, and, also, penetrate from outgoing plane in the outgoing plane refraction.Shown in Figure 15 (b), when not applying electric field, incident light does not reflect and straight by EO diffraction element 114, when applying electric field, can control refraction angle by the polarity and the size that apply electric field.

By EO diffraction element 114, penetrate the angle Be Controlled laser via the photon mode recording layer of object lens 115 optically focused to CD 116.CD 116 for example is the CD with the rail groove shown in Figure 12 (a).Light in the reflection of the photon mode recording layer of CD 116 is injected beam splitter 113 via object lens 115 and EO diffraction element 114.The reflected light that is injected into beam splitter 113 is to the direction reflection different with the outlet and inject semi-permeable mirror 117.Semi-permeable mirror 117 is two with the optical branch of injecting.

1 branched optical cable in the incident light, see through semi-permeable mirror 117, through cylindrical lens 118, inject 4 and cut apart wave detector (Detector) 119.4 cut apart wave detector 119, are divided into four zones, the light quantity at the light that each zone received can be converted to corresponding electric signal A, B, C, D.Focus error signal is that the computing of electric signal by (A+D)-(B+C) drawn.This computing, 11A carries out at the focus error detection circuit, and it is exported as focus error signal.Therefore, inject the light time of identical light quantity in each zone, then the state that matches for focus.In addition, in this example, in focus error detection circuit 11A, also carry out the computing of the electric signal A that each is regional, B, C, D addition (A+B+C+D) simultaneously, it is exported as regenerated signal.Certainly, regenerated signal can generate in tracking error testing circuit 11D too.

In addition, other branched optical cable is injected 4 by collector lens 11B and is cut apart wave detector 11C via semi-permeable mirror 117 reflections.4 cut apart wave detector 11C is divided into four fields, is converted to electric signal A, B, C, D corresponding to the light quantity of the light that receives in each zone.The tracking error signal draws by electric signal (A+C)-(B+D) computing.This computing is carried out at focus error detection circuit 11D, exports as focus error signal.Therefore, inject the light of same light quantity in the zone that detects electric signal A, C and the zone that detects electric signal B, D, electric signal A, C sum just are in the state of ON track with electric signal B, when the D sum is identical.In addition, tracking error testing circuit 11D output pulse signal when the tracking error signal crosses zero level.With this pulse signal as the track centre signal.

Focus error signal is imported into to focus on follows the trail of actuator control circuit 11F.Focus on tracking actuator control circuit 11F and carry out focus control by focus error signal control actuator 11G.

The tracking error signal is imported into error-detector circuit 11E of amplitude central authorities and refraction control circuit.In optical recording/reproducing apparatus shown in Figure 14, the square frame of fillet is the square frame that constitutes the refraction control circuit.When record and regeneration, the refraction control circuit is one group with the track that specifies number of adjacency, and indication light beam track with appointment in one group of track periodically moves.

The error-detector circuit 11E of amplitude central authorities is with time constant integration and the output of tracking error signal with appointment.Therefore, light beam is not between track when periodically mobile, and promptly identical with common tracking error signal when light beam mediates, the error-detector circuit 11E of amplitude central authorities output is with the signal of the tracking error signal averaging of designated duration.The output of the error-detector circuit 11E of amplitude central authorities is imported into to focus on follows the trail of actuator control circuit 11F.Focusing tracking actuator control circuit 11F carries out Tracing Control by the signal controlling actuator 11G of the average tracking error of the expression of input.

The refraction control circuit comprises amplitude detecting circuit 11H, vibration testing circuit 11I, frequency comparison circuit 11J, phase-comparison circuit 11K, pit phase detecting circuit 11L, selects circuit 11M, selects control circuit 11N and VCO (voltage-controlled oscillator) 11O.The action of refraction control circuit is divided into following four steps.

In first step, make under the state of beam stationary, track central in the track groups is carried out Tracing Control.This Tracing Control with common CD is identical.That is, focus on to follow the trail of actuator control circuit 11F, based on from the error-detector circuit 11E of amplitude central authorities output, with the signal of tracking error signal after with the period average of appointment, control tracking.

In second step, be the center with the track centre of central authorities in the track groups, the track of light beam is moved the size that amplitude is controlled to be appointment.At this moment, amplitude detecting circuit 11H is transfused to the track moving period signal of expression tracking error signal and track moving period.Amplitude detecting circuit 11H detects the amplitude that light beam moves at track, compares with target amplitude, and amplitude control signal is outputed to VCO11O.VCO11O outputs to the amplitude of the refraction control signal of EO diffraction element 114 according to amplitude control signal control.When record and regeneration, EO diffraction element 114 makes the refraction of optical beam based on the refraction control signal by the VCO11O input, with light beam with the track of appointment one group of track intercycle move.

At this, the structure of amplitude detecting circuit 11H is described in detail.Figure 16 is the figure that is used to illustrate amplitude detecting circuit shown in Figure 14, and Figure 16 (a) is the block scheme of the detailed structure of expression amplitude detecting circuit shown in Figure 14, and Figure 16 (b) is the figure that is illustrated in signal processed among the amplitude detecting circuit 11H.Amplitude detecting circuit 11H comprises that peak valley detects counting/sequence (Sequence) control circuit 11P and ripple end level (level) comparator circuit 11Q.

Peak valley detects counting/sequence control circuit 11P and comprises peak valley testing circuit 130, peak valley detection counter 132 and code translator 133.The tracking error signal is imported into peak valley testing circuit 130 and ripple end level comparison circuit 131.In peak valley testing circuit 130, detect peak (the peak value)/paddy (valley) of tracking error signal, output detects pulse.Detect pulse and be imported into peak valley counter 132.

Peak valley counter 132 whenever has a pulse just to count once.And input is by the track moving period signal of VCO11O output in peak valley counter 132.Peak valley counter 132, the peak valley counter 132 of when input has the pulse of track moving period signal, just resetting.Therefore, peak valley counter 132 is that the peak valley of one-period is counted.Carry out rough amplitude control by this count value.And this peak valley count value is represented the phase place that track moves.Code translator 133 is deciphered by the counting output to peak valley counter 132, and output pit phase-detection selects signal or fractional frequency signal to carry out sequence control.

And two ripple end level ratio of code translator 133 outputs allow (Enable) signal.Code translator 133 allows signal to output to peak value ripple end level ratio with the phase place of the middle body of the crest of track moving period to keep (Hold) circuit 134, allows signal to output to valley hold circuit 135 ripple end level ratio with the phase place of the middle body of the trough of track moving period.The crest voltage of the tracking error signal when peak holding circuit 134 keeps ripple end level ratio to allow the signal input, and output to comparator circuit 136.And, the valley point voltage of the tracking error signal when valley hold circuit 135 keeps ripple end level ratio to allow the signal input, and output to comparator circuit 136.Comparator circuit 136 is exported the difference of the valley point voltage that the crest voltage and the valley hold circuit 135 of peak holding circuit 134 outputs are exported as amplitude control signal.

Amplitude control signal is output to and selects control circuit 11N, and when amplitude control signal is designated value when following, switching selecting circuit 11M makes frequency comparison circuit 11J be connected with VCO11O, to carry out the state of amplitude control, transfers to third step.

In third step, the periodic Control that light beam is moved a track groups is a channel bit.The vibration that vibration testing circuit 11I detects the central orbit of a track groups forms dither signal, forms track moving reference signal by the multiplication dither signal.Frequency comparison circuit 11J compares the frequency of the track moving reference signal of the frequency of the fractional frequency signal of amplitude control circuit 11H output and vibration testing circuit 11I output and detects error, and detected error is exported as frequency error signal.

Frequency error signal is output to and selects control circuit 11N, and when frequency error signal is designated value when following, switching selecting circuit 11M makes phase-comparison circuit 11K be connected with VCO11O, and transfers to the 4th step.

In the 4th step, the phase control that light beam is moved a track groups has designated phase for specified location in orbit.At first, track travel(l)ing phase and vibration phase place are aligned.Phase-comparison circuit 11K compares the phase place of the track moving reference signal of the phase place of the fractional frequency signal of amplitude control circuit 11H output and vibration testing circuit 11I output and detects error, and detected error is exported as phase error signal.

Phase error signal is output to and selects control circuit 11N, and when phase error signal is designated value when following, switching selecting circuit 11M makes pit phase detecting circuit 11L be connected with VCO11O, and transfers to pit phase-locking pattern.

Pit phase-locking pattern by detecting the pit that is recorded in advance on the CD, is accurately aimed at this detected phase place with the phase place that track moves, and controls the long following phase place of pit.Figure 17 is the block scheme of the structure of expression pit phase detecting circuit 11L shown in Figure 14.Input pit phase-detection is selected signal, regenerated signal, trough periodic signal, crest periodic signal and the fractional frequency signal that separates peak valley among the pit phase detecting circuit 11L, output pit phase error signal.The general moment that the benchmark pit that the pit phase-detection selects signal indication to be recorded in the outer side track of track groups is detected.

Peak detection circuit 140 detects the pit phase-detection and selects crest value output pit phase impulse on the regenerated signal during signal is asserted (assert).The pit phase impulse is imported into phase-comparison circuit 141 and phase-comparison circuit 142.Phase-comparison circuit 141 will be input to the pit phase impulse of trough part by fractional frequency signal and the phase place of trough periodic signal compares output error signal.Phase-comparison circuit 142 will be input to the pit phase impulse of crest part by fractional frequency signal and the phase place of crest periodic signal compares output error signal.Two error signal additions are output as the pit phase error signal.

Figure 18 is the figure of configuration of the benchmark pit of expression optical record medium.Wherein, outside benchmark pit 70, outside benchmark pit 71 and central reference pit 80 were recorded with certain cycle, like this, detected and became easy.And, also the benchmark pit can be also used as physical address.

More than, if the pit phase error is in the designated value, input record data in laser power control circuit 111 just, laser power control circuit 111, if the track centre signal is asserted, laser power pulse type ground is increased, carry out record at the track of appointment.

And when regeneration, laser power control circuit 111 is controlled to be the power of laser instrument 110 regenerating power of appointment.When the track centre signal of track designation is asserted, the regenerated signal of focus error detection circuit 11A output (with 4 four sensor signal added signal cutting apart wave detector 119) is sampled in AD (analog digital) converter 11R, can obtain playback of data.

In addition, in the present embodiment, optical recording/reproducing apparatus is equivalent to optical recording control circuit, optical recording apparatus, the optical regeneration control circuit, an example of optical regeneration device and Tracing Control circuit, the refraction control circuit is equivalent to an example of mobile instruction unit, laser power control circuit 111 is equivalent to write down an example of instruction unit and regeneration instruction unit, EO diffraction element 114 is equivalent to an example of moving part, laser power control circuit 111 and laser instrument 110 are equivalent to an example of recording portion, laser power control circuit 111, laser instrument 110, focus error detection circuit 11A and AD converter 11R are equivalent to an example of reproducing unit.

In addition, the example that actuator control circuit 11F is equivalent to Tracing Control portion is followed the trail of in amplitude error-detector circuit 11E of central authorities and focusing, amplitude detecting circuit 11H and VCO11O are equivalent to an example of amplitude control part, vibration testing circuit 11I, amplitude detecting circuit 11H, frequency comparison circuit 11J and VCO11O are equivalent to an example of periodic Control portion, and amplitude detecting circuit 11H, pit phase detecting circuit 11L and VCO11O are equivalent to an example of phase control division.

Like this, in when record, laser power control circuit 111 as input, is controlled to be pulse type with the luminous power of laser instrument 110 with record data and track centre signal.The laser beam transformation that collimation lens 112 will penetrate from laser instrument 110 is a directional light.EO diffraction element 114 is based on the refractive index control signal that is used to make laser periodically to move with the track of appointment in the track that specifies number of adjacency, makes via the radial direction refraction to CD 116 of the directional light of collimation lens 112 conversion.Object lens 115 will be by the directional light optically focused of EO diffraction element 114 refraction, has in the track of recording layer to form the optically focused luminous point in CD 116.Tracking error testing circuit 11D will receive from the reflected light of optically focused luminous point, and the track centre signal of output tracking error signal and expression track centre.The refraction control circuit is input with the tracking error signal, will be used to make light beam to output to EO diffraction element 114 with the periodically mobile refractive index control signal of the track of appointment in the track that specifies number of adjacency.The error-detector circuit 11E of amplitude central authorities is input with the tracking error signal, and the central authorities of the amplitude after the tracking error signal averaging of input within the fixed period error signal is outputed to actuator 11G.Actuator 11G is based on amplitude central authorities error signal drives object lens 115.

Therefore, make it be the record that pulse type carries out data, can shorten the needed time of record data, can improve transfer rate thereby the power of light beam controlled during each track of the track that specifies number by crossing adjacency at light beam central.

And when regeneration, laser power control circuit 111 is controlled to be designated value with the luminous power of laser instrument 110.The laser beam transformation that collimation lens 112 will penetrate from laser instrument 110 is a directional light.EO diffraction element 114 periodically moves laser track with appointment in the track that specifies number of adjacency based on being used to, and the refractive index control signal that the moving period that makes laser is consistent with the cycle of a channel bit of the record symbol that is recorded in orbital direction makes the directional light via collimation lens 112 conversion reflect to the radial direction of CD 116.Object lens 115 will be by the directional light optically focused of EO diffraction element 114 refraction, has in the track of recording layer to form the optically focused luminous point in CD 116.Tracking error testing circuit 11D will receive from the reflected light of optically focused luminous point and output tracking error signal and track centre signal and the regenerated signal of representing track centre.The refraction control circuit is input with the tracking error signal, to EO refracting element 114 output refractive index control signals.The error-detector circuit 11E of amplitude central authorities is input with the tracking error signal, and the central authorities of the amplitude after the tracking error signal averaging of input within the fixed period error signal is outputed to actuator 11G.Actuator 11G is based on amplitude central authorities error signal drives object lens 115.AD converter 11R is transfused to track centre signal and regenerated signal, when the track centre signal is asserted to the regenerated signal output playback of data of sampling.

Therefore, laser a channel bit intercycle move, the luminous power of control laser instrument 110 is carried out the regeneration of data when crossing track centre by laser, the data that can regenerative high-density ground write down.

In addition, above-mentioned specific embodiment mainly comprises the invention with following structure.

Optical recording control method provided by the invention comprises, the mobile indication step that the indication light beam periodically moves with the track of appointment in the track that specifies number with adjacency is above-mentioned one group of track of one group; Indication is controlled the power of above-mentioned light beam and is made this power be pulse type and be the intensity of appointment when above-mentioned light beam crosses above-mentioned each track central, and data are recorded in record indication step in above-mentioned one group of track.

Optical recording control circuit provided by the invention comprises, the mobile instruction unit that the indication light beam periodically moves with the track of appointment in the track that specifies number with adjacency is above-mentioned one group of track of one group; Indication is controlled the power of above-mentioned light beam and is made this power be pulse type and be the intensity of appointment when above-mentioned light beam crosses above-mentioned each track central, and data is recorded in the record instruction unit of record data in above-mentioned one group of track.

Optical recording method provided by the invention comprises, the mobile step that light beam is periodically moved with the track of appointment in the track that specifies number with adjacency is above-mentioned one group of track of one group; The power of above-mentioned light beam controlled make this power when above-mentioned light beam crosses above-mentioned each track central, be pulse type and be the intensity of appointment, and data are recorded in recording step in above-mentioned one group of track.

Optical recording apparatus provided by the invention comprises, the moving part that light beam is periodically moved with the track of appointment in the track that specifies number with adjacency is above-mentioned one group of track of one group; The power of above-mentioned light beam controlled make this power when above-mentioned light beam crosses above-mentioned each track central, be pulse type and be the intensity of appointment, and data are recorded in recording portion in above-mentioned one group of track.

According to these structures, the track that specifies number with adjacency is one group, periodically moves at the track of one group of track inner light beam with appointment, the power of control bundle is pulse type and reaches the intensity of appointment when light beam crosses above-mentioned each track central, and data are recorded in one group of track.

Therefore, the power with light beam during each track of the track of the some by crossing adjacency at light beam central is controlled to be the record that pulse type carries out data, can shorten the needed time of record data, can improve transfer rate.

And, in above-mentioned optical recording control method, the moving period that makes in above-mentioned one group of track the above-mentioned light beam that moves be recorded in orbital direction on consistent being advisable of 1 channel bit period of record symbol.

According to this structure, the moving period of the light beam that in one group of track, moves, because it is consistent with a channel bit period of the record symbol that is recorded in orbital direction, so light beam a channel bit intercycle move, carry out the record of data, record data to high-density by the power of pulse type ground control bundle when light beam crosses track centre.

And in above-mentioned optical recording control method, above-mentioned one group of track constitutes suitable by the odd number track.According to this structure, because one group of track is to be made of the odd number track, when light beam was mobile in the odd number track, it is central consistent that central orbit and light beam move, revise thereby can easily detect the skew that light beam moves like this, can realize the regeneration that time base error is less.

And in above-mentioned optical recording control method, the track of the above-mentioned light beam that moves in above-mentioned one group of track is that triangular wave is advisable.According to this structure, because the track of the light beam that moves in one group of track is a triangular wave, so light beam can be striden track and be moved.

And in above-mentioned optical recording control method, the track of the above-mentioned light beam that moves in above-mentioned one group of track is that sine wave is advisable.According to this structure, because the beam trajectory that moves in one group of track is a sine wave shape, so amplitude, frequency and phase place by control bundle track mobile beam easily.

In addition, in above-mentioned optical recording control method, above-mentioned record indication step, indication is controlled the intensity that is pulse type when making the track of this power beyond above-mentioned light beam crosses the two ends of above-mentioned one group of track central and reaches appointment to the power of above-mentioned light beam, and data is recorded in the track beyond the two ends of above-mentioned one group of track and is advisable.

According to this structure, the power with light beam during track centre beyond at the two ends of crossing one group of track is controlled to be pulse type and be the intensity of appointment, and in the track in addition of the two ends of one group of track record data.Therefore, the straight line portion that can move with light beam, promptly the most stable part of the track of light beam is carried out record, therefore can reduce the record time base error.

In addition, also comprising in above-mentioned optical recording control method regenerates indicates step to be advisable, wherein, above-mentioned record indication step, indication is controlled the power of above-mentioned light beam and make that this power is the intensity of the appointment of above-mentioned pulse type the spending in the phase range from 90 degree phase places to 270 of moving period that above-mentioned light beam moves in above-mentioned one group of track, and data are recorded in the two ends track in addition of above-mentioned one group of track or above-mentioned one group of track, above-mentioned regeneration indication step, indication is controlled the power of above-mentioned light beam and is made this power be regenerating power in the phase range the spending from 270 degree phase places to 90 of moving period that above-mentioned light beam moves in above-mentioned one group of track, and the regenerated signal that the reflected light that receives above-mentioned light beam during to the track beyond at the two ends of crossing above-mentioned one group of track or above-mentioned one group of track central generates is sampled the data in the track of regenerative recording beyond the two ends of above-mentioned one group of track or above-mentioned one group of track.

According to this structure, the power from 90 degree phase place to 270 degree phase range inner control light beams of the moving period of the light beam that moves in one group of track is pulse type and is the intensity of appointment, record data in the track beyond the two ends of one group of track or one group of track.Then, the power from 270 degree phase place to 90 degree phase range inner control light beams of the moving period of the light beam that moves in above-mentioned one group of track is regenerating power, and the regenerated signal that the reflected light of receiving beam generates during to the track beyond at the two ends of crossing one group of track or one group of track central is sampled the data in the track of regenerative recording beyond the two ends of one group of track or one group of track.

Therefore, by the signal of regenerating in 270 degree phase places to the 90 degree phase range in the moving period of light beam, be recorded in the data of spending in phase places to the 270 degree phase range from 90, can confirm that by partly responding appropriate signals processing such as equilibrium it has the track of appointment.Like this, by in one-period, writing down and regenerate, calibration tails data in real time (mark and blank), thus can improve the confidence level of record.

Optical reproduction control method provided by the invention comprises, the mobile indication step that the indication light beam periodically moves with the track of appointment in the track that specifies number with adjacency is above-mentioned one group of track of one group; Indication receives the regenerated signal that the reflected light of above-mentioned light beam generates when crossing above-mentioned track central at above-mentioned light beam and samples, and the regeneration of the data of regenerative recording in above-mentioned one group of track indication step, wherein, consistent in cycle of the above-mentioned light beam that moves on above-mentioned one group of track with 1 channel bit period of record symbol on being recorded in orbital direction.

Optical regeneration control circuit provided by the invention comprises, the mobile instruction unit that the indication light beam periodically moves with the track of appointment in the track that specifies number with adjacency is above-mentioned one group of track of one group; Indication receives the regenerated signal that the reflected light of above-mentioned light beam generates when crossing above-mentioned track central at above-mentioned light beam and samples, and the regeneration instruction unit of the data of regenerative recording in above-mentioned one group of track, wherein, consistent in cycle of the above-mentioned light beam that moves on above-mentioned one group of track with 1 channel bit period of record symbol on being recorded in orbital direction.

Optical reproduction method provided by the invention comprises, the mobile indication step that light beam is periodically moved with the track of appointment in the track that specifies number with adjacency is above-mentioned one group of track of one group; Receiving the regenerated signal that the reflected light of above-mentioned light beam generates when crossing above-mentioned track central at above-mentioned light beam samples, and the regeneration of the data of regenerative recording in above-mentioned one group of track indication step, wherein, consistent in cycle of the above-mentioned light beam that moves on above-mentioned one group of track with 1 channel bit period of record symbol on being recorded in orbital direction.

Optical regeneration device provided by the invention comprises, the mobile instruction unit that light beam is periodically moved with the track of appointment in the track that specifies number with adjacency is above-mentioned one group of track of one group; Receiving the regenerated signal that the reflected light of above-mentioned light beam generates when crossing above-mentioned track central at above-mentioned light beam samples, and the regeneration instruction unit of the data of regenerative recording in above-mentioned one group of track, wherein, consistent in cycle of the above-mentioned light beam that moves on above-mentioned one group of track with 1 channel bit period of record symbol on being recorded in orbital direction.

According to these structures, the track that specifies number with adjacency is one group, periodically move with the track of appointment in one group of track, the regenerated signal that the reflected light of receiving beam generates when crossing track central at light beam is sampled, and the data of regenerative recording in one group of track.And, consistent in cycle of the light beam that moves on one group of track with 1 channel bit period of record symbol on being recorded in orbital direction.

Therefore, light beam 1 channel bit intercycle move, when light beam crosses track centre, carry out the regeneration of data by the regenerating power of control bundle, can regenerative high-density ground the data of record.

And in above-mentioned optical reproduction control method, above-mentioned one group of track constitutes suitable by the odd number track.According to this structure, because one group of track is to be made of the odd number track, when light beam was mobile in the odd number track, it is central consistent that central orbit and light beam move, revise thereby can easily detect the skew that light beam moves like this, can realize the regeneration that time base error is less.

And in above-mentioned optical reproduction control method, the track of the above-mentioned light beam that moves in above-mentioned one group of track is that triangular wave is advisable.According to this structure, because the track of the light beam that moves in one group of track is a triangular wave, so light beam can be striden track and be moved.

And in above-mentioned optical reproduction control method, the track of the above-mentioned light beam that moves in above-mentioned one group of track is that sine wave is advisable.According to this structure, because the beam trajectory that moves in one group of track is a sine wave shape, so amplitude, frequency and phase place by control bundle track mobile beam easily.

In addition, in above-mentioned optical reproduction control method, above-mentioned regeneration indication step, indication receives the regenerated signal that the reflected light of above-mentioned light beam generates during to the track beyond the two ends of crossing above-mentioned one group of track at above-mentioned light beam central and samples, and the data in the track of regenerative recording beyond the two ends of above-mentioned one group of track are advisable.

According to this structure, the regenerated signal that the reflected light of receiving beam generates during to the track centre beyond the two ends of crossing one group of track at light beam is sampled, the data of the track of regenerative recording beyond the two ends of one group of track.Therefore, the straight line portion that can move with light beam, promptly the most stable part of track of light beam is regenerated, and therefore can reduce the regeneration time base error.

In addition, in above-mentioned optical reproduction control method, above-mentioned regeneration indication step, indication is controlled the power of above-mentioned light beam and is made this power be regenerating power in the phase range the spending from 90 degree phase places to 270 of moving period that above-mentioned light beam moves in above-mentioned one group of track, and the regenerated signal that the reflected light that receives above-mentioned light beam during to the track beyond at the two ends of crossing above-mentioned one group of track or above-mentioned one group of track central generates is sampled, data in the track of regenerative recording beyond the two ends of above-mentioned one group of track or above-mentioned one group of track, also indicating the power of above-mentioned light beam controlled makes this power be regenerating power in moving period that above-mentioned light beam moves in 270 degree phase places to 90 degree phase range in above-mentioned one group of track, and above-mentioned regenerated signal is sampled during track central beyond at the two ends of crossing above-mentioned one group of track or above-mentioned one group of track, the data in the track of regenerative recording beyond the two ends of above-mentioned one group of track or above-mentioned one group of track are advisable.

According to this structure, the power from 90 degree phase place to 270 degree phase range inner control light beams of the moving period of the light beam that moves in above-mentioned one group of track is regenerating power, and the regenerated signal that the reflected light of receiving beam generates during to the track beyond at the two ends of crossing one group of track or one group of track central is sampled the data in the track of regenerative recording beyond the two ends of one group of track or one group of track.Then, the power from 270 degree phase place to 90 degree phase range inner control light beams of the moving period of the light beam that moves in above-mentioned one group of track is regenerating power, and the regenerated signal during to the track beyond at the two ends of crossing one group of track or one group of track central is sampled the data in the track of regenerative recording beyond the two ends of one group of track or one group of track.

Therefore,, promptly in 1 record symbol bit, the regenerated signal of each track is carried out twice sampling and come playback of data because the moving of the light beam of one-period, thus verification playback of data in real time, thus can improve the confidence level of regeneration.

Optical record medium provided by the invention comprises, track and recording layer, and wherein, with the above-mentioned track formation group that specifies number of adjacency, two tracks of central orbit in above-mentioned one group of track or central authorities are with the amplitude and the fibrillation cycle of appointment.

According to this structure, with the track formation group that specifies number of adjacency because with two tracks of central orbit in one group of track or central authorities with the amplitude and the fibrillation cycle of appointment, so can use moving of dither signal control bundle.

Another kind of optical record medium provided by the invention comprises, track and recording layer, and wherein, with the above-mentioned track formation group that specifies number of adjacency, above-mentioned group interval of adjacency is wideer than the orbital spacing in above-mentioned group.

According to this structure, with the track formation group that specifies number of adjacency,, move in the track of adjacent set so can prevent the light beam mistake because the orbital spacing in the ratio group of the interval of contiguous set is wide, can make the light beam in one group of track mobile reliably.

In addition, in above-mentioned optical record medium, the track at the two ends of above-mentioned one group of track is linearly, and the track vibration beyond the two ends of above-mentioned one group of track is advisable.According to this structure, because the track at the two ends of one group of track is shape linearly, track vibration beyond the two ends of one group of track so the track at one group of track two ends can be used as the controlled target of light beam, is used the track beyond the two ends as the center that the periodicity of light beam moves.

In addition, in above-mentioned optical record medium, the vibration cycle of above-mentioned track is that light beam is advisable at the integral multiple in the cycle that above-mentioned one group of track moves.According to this structure because the vibration cycle of track be light beam at the integral multiple in the cycle that one group of track moves, so the cycle that can use vibration periodic Control light beam to move.

In addition, in above-mentioned optical record medium, the vibration cycle of above-mentioned track is that above-mentioned light beam is advisable at the integral multiple of 1 channel bit of the record symbol that above-mentioned track write down.According to this structure because the vibration cycle of track be the integral multiple of light beam in 1 channel bit of the record symbol that track write down, so, by the cycle that makes light beam be a channel bit, the cycle that can use vibration periodic Control light beam to move.

In addition, in above-mentioned optical record medium, in the track at the two ends of above-mentioned one group of track, the N+0.5 cycle of the above-mentioned channel bit period that staggers mutually, form the reference phase pit and be advisable, wherein, N is an integer.According to this structure, because track at the two ends of one group of track, be formed with the reference phase pit in the N+0.5 cycle of the channel bit period that staggers mutually, wherein, N is an integer, so light beam is sinusoidal wave shape when moving, partly be controlled to be by peak valley the track of light beam consistent with the reference phase pit, can be easily can control bundle phase place.

Another optical record medium provided by the invention comprises, track and a plurality of recording layer, and above-mentioned track has and the identical structure of above-mentioned each described optical record medium apart from the plane of incidence layer farthest of above-mentioned light beam.According to this structure, in having the optical record medium of a plurality of recording layers, also can adopt the structure of above-mentioned track.

Tracing control method provided by the invention comprises, is one group with the track that specifies number of adjacency, the central orbit in above-mentioned one group of track carried out the first step of Tracing Control; Central authorities with the central orbit in above-mentioned one group of track are the center, the mobile amplitude of periodically mobile above-mentioned light beam are controlled at second step of appointment size; Will above-mentioned one group of track intercycle the moving period of the above-mentioned light beam that moves be controlled at the third step of designated period; Will above-mentioned one group of track intercycle the travel(l)ing phase of the above-mentioned light beam that moves be controlled at the 4th step of the designated phase of the assigned address in above-mentioned one group of track.

Tracing Control circuit provided by the invention comprises, is the Tracing Control portion that central orbit in above-mentioned one group of track of one group carries out Tracing Control to the track that specifies number with adjacency; Central authorities with the central orbit in above-mentioned one group of track are the center, the mobile amplitude of periodically mobile above-mentioned light beam are controlled to be the amplitude control part of appointment size; Will above-mentioned one group of track intercycle the moving period of the above-mentioned light beam that moves be controlled at the periodic Control portion of designated period; Will above-mentioned one group of track intercycle the travel(l)ing phase of the above-mentioned light beam that moves be controlled to be the phase control division of the designated phase of the assigned address in above-mentioned one group of track.

According to these structures, with the track that specifies number of adjacency as one group, track to the central authorities in one group of track carries out Tracing Control, and is the center with the central authorities of the track of the central authorities in one group of track, the mobile amplitude of the light beam that periodically moves is controlled to the size of appointment.And, will one group of track intercycle the moving period of the light beam that moves be controlled to be cycle of appointment, will one group of track intercycle the travel(l)ing phase of the light beam that moves be controlled to be the designated phase of the assigned address in one group of track.

Therefore, at first allow light beam in the central orbit of one group of track, follow the trail of, secondly, the amplitude of control bundle, then, in the cycle that control bundle moves, then, the phase place of control bundle can make light beam be sinusoidal wave shape like this and move.

In above-mentioned tracing control method, above-mentioned second step, will above-mentioned one group of track intercycle the tracking error signal of the 0 degree phase place of moving period of the above-mentioned light beam that moves and 180 degree phase places detect with the skew at the center of periodically moving of above-mentioned light beam as the central authorities of the central orbit in above-mentioned one group of track, be controlled to be suitable to the mobile center of above-mentioned light beam.

According to this structure, with one group of track intercycle the tracking error signal of the 0 degree phase place of moving period of the light beam that moves and 180 degree phase places detect with the skew at the center of periodically moving of light beam as the central authorities of the central orbit in one group of track, thereby carry out the center of moving of light beam is controlled.

Therefore, 0 degree phase place of the moving period by detecting light beam and 180 degree phase places, promptly, tracking error signal when light beam passes through central orbit, can detect the skew at the center of periodically moving of central orbit and light beam, can be that the center of the moving control to light beam is carried out on the basis with this tracking error signal.

In above-mentioned tracing control method, above-mentioned second step, the tracking error signal that will carry out integration with the reasonable time constant detects as the skew at the center of periodically moving of the central authorities of the central orbit in above-mentioned one group of track and above-mentioned light beam, carries out being controlled to be of the center of moving of above-mentioned light beam suitable.

According to this structure, carried out the tracking error signal of integration with the reasonable time constant, be detected as the skew at the center of periodically moving of the central authorities of the central orbit in one group of track and light beam, thereby carry out the center of the moving control of light beam.Therefore, by the tracking error signal is carried out integration with the time constant of suitable appointment, the position of the light beam after can detecting on average, promptly, light beam one group of track intercycle the center of the track that moves and the error of central orbit, thereby can control bundle make its one group of track intercycle the center of the track that moves consistent with central orbit.

In above-mentioned tracing control method, above-mentioned second step, the crest number by the tracking error signal in the moving period that makes periodically the above-mentioned light beam that moves is controlled the mobile amplitude of above-mentioned light beam and is advisable for specifying number.

According to this structure, the crest number by the tracking error signal in the moving period that makes periodically the light beam that moves is one to specify number, and comes the amplitude that moves of control bundle.That is, be the center with the target amplitude, as long as at the amplitude of appointment with interior words, the crest value number of tracking error signal is just fixing, so control increases amplitude if the crest value number just lacks than designation number, control reduces amplitude if the crest value number just manys than designation number, can control amplitude roughly like this.

In above-mentioned tracing control method, above-mentioned second step, in the tracking error signal in a moving period of the above-mentioned light beam that periodically moves, control the mobile amplitude of above-mentioned light beam with the differential wave of the tracking error signal in two peak swing parts of above-mentioned light beam in moving and be advisable.

According to this structure, in the tracking error signal in a moving period of the light beam that periodically moves, come the mobile amplitude of control bundle with the differential wave of the tracking error signal in two peak swing parts of light beam in moving.Therefore, in the one-period that between track, moves, when amplitude is maximum, carry out amplitude control, so that the tracking error aligned phase signal of the tracking error signal of 90 degree during phase places when spending phase places with 270 can be the central authorities of crossing the outermost track of one group of track with Beam Control.

In above-mentioned tracing control method, above-mentioned third step, generate the vibration detection signal of above-mentioned one group of track by the tracking error signal that detects the designated phase that periodically moves of above-mentioned light beam in above-mentioned one group of track, and generate the track moving reference signal of frequency of the appointment integral multiple of above-mentioned vibration detection signal, crest part by will detecting above-mentioned tracking error signal and trough peak valley detection signal partly carry out frequency division with designation number and generate fractional frequency signal again, use the value that the frequency of above-mentioned track moving reference signal is compared with the frequency of above-mentioned fractional frequency signal to carry out being controlled to be suitable to the moving period of above-mentioned light beam.

According to this structure, generate the vibration detection signal of one group of track by the tracking error signal that detects the designated phase that periodically moves of light beam in one group of track, and generate the track moving reference signal of the frequency of the appointment integral multiple that trembles detection signal.Then, crest part by will detecting the tracking error signal and trough peak valley detection signal partly carry out frequency division with designation number and generate fractional frequency signal, use the value that the frequency of track moving reference signal is compared with the frequency of fractional frequency signal to carry out the control of the moving period of light beam.Therefore, the comparison of the frequency by track moving reference signal and the frequency of fractional frequency signal can be carried out suitable control in the cycle that one group of track moves to light beam.

In above-mentioned tracing control method, above-mentioned third step, by the tracking error signal when mobile carries out the vibration detection signal that integration generates above-mentioned one group of track with the time constant of appointment on above-mentioned one group of track intercycle ground with above-mentioned light beam, and generate the track moving reference signal of frequency of the appointment integral multiple of above-mentioned vibration detection signal, crest part by will detecting above-mentioned tracking error signal and trough peak valley detection signal partly carry out frequency division with designation number and generate fractional frequency signal again, use the value that the frequency of above-mentioned track moving reference signal is compared with the frequency of above-mentioned fractional frequency signal to carry out being controlled to be suitable to the moving period of above-mentioned light beam.

According to this structure, tracking error signal by with light beam periodically mobile in one group of track the time carries out the vibration detection signal that integration generates one group of track with the time constant of appointment, and generates the track moving reference signal of frequency of the appointment integral multiple of vibration detection signal.Then, the crest part by will detecting the tracking error signal and the peak valley detection signal of trough part carry out frequency division with designation number and generate fractional frequency signal, use the value that the frequency of track moving reference signal is compared with the frequency of fractional frequency signal to carry out the moving period of light beam is controlled.

Therefore, even the tracking error signal is not sampled in the phase place of appointment, by carrying out integration, also can generate same track moving reference signal, the cycle of utilizing this track moving reference signal also can control bundle on a track groups, to move with the reasonable time constant.

In above-mentioned tracing control method, the cycle of above-mentioned track moving reference signal is with consistent being advisable of integral multiple of 1 channel bit period of the record symbol that is recorded in orbital direction.According to this structure, because the cycle of track moving reference signal is consistent with the integral multiple of 1 channel bit period of the record symbol that is recorded in orbital direction, so, by the frequency of comparison track moving reference signal and the frequency of fractional frequency signal, the periodic Control that light beam can be moved in one group of track be 1 channel bit period that is recorded in the record symbol of each orbital direction.

In above-mentioned tracing control method, above-mentioned the 4th step, by detect above-mentioned one group of track intercycle the tracking error signal of the designated phase in the one-period of the above-mentioned light beam that moves generate the vibration detection signal of above-mentioned one group of track, and generate the track moving reference signal of frequency of the appointment integral multiple of above-mentioned vibration detection signal, crest part by will detecting above-mentioned tracking error signal and trough peak valley detection signal partly carry out frequency division with designation number and generate fractional frequency signal again, use the value that the phase place of above-mentioned track moving reference signal is compared with the phase place of above-mentioned fractional frequency signal to carry out being controlled to be suitable to the travel(l)ing phase of above-mentioned light beam.

According to this structure, by detect one group of track intercycle the tracking error signal of the designated phase in the one-period of the light beam that moves generate the vibration detection signal of one group of track, and generate the track moving reference signal of frequency of the appointment integral multiple of vibration detection signal.Then, crest part by will detecting the tracking error signal and trough peak valley detection signal partly carry out frequency division with designation number and generate fractional frequency signal, use the value that the phase place of track moving reference signal is compared with the phase place of fractional frequency signal to carry out the control of the travel(l)ing phase of light beam.Therefore, by the relatively phase place of track moving reference signal and the phase place of fractional frequency signal, the phase place that moves at one group of track of control bundle suitably.

In above-mentioned tracing control method, above-mentioned the 4th step, by the tracking error signal when mobile carries out the vibration detection signal that integration generates above-mentioned one group of track with the time constant of appointment on above-mentioned one group of track intercycle ground with above-mentioned light beam, and generate the track moving reference signal of frequency of the appointment integral multiple of above-mentioned vibration detection signal, crest part by will detecting above-mentioned tracking error signal and trough peak valley detection signal partly carry out frequency division with designation number and generate fractional frequency signal again, and it is suitable to use the value that the phase place of above-mentioned track moving reference signal is compared with the phase place of above-mentioned fractional frequency signal to carry out being controlled to be of the travel(l)ing phase of above-mentioned light beam.

According to this structure, tracking error signal by with light beam periodically mobile in one group of track the time carries out the vibration detection signal that integration generates one group of track with the time constant of appointment, and generates the track moving reference signal of frequency of the appointment integral multiple of vibration detection signal.Then, crest part by will detecting the tracking error signal and trough peak valley detection signal partly carry out frequency division with designation number and generate fractional frequency signal, use the value that the phase place of track moving reference signal is compared with the phase place of fractional frequency signal to carry out the control of the travel(l)ing phase of light beam.

Therefore, even the tracking error signal is not sampled in the phase place of appointment, by carrying out integration, also can generate same track moving reference signal, the phase place of utilizing this track moving reference signal also can control bundle in one group of track, to move with the reasonable time constant.

In above-mentioned tracing control method, the N+0.5 of 1 channel bit of the record symbol that being pre-formed in the track at the two ends of above-mentioned one group of track staggers mutually writes down in orbital direction is the outside reference phase pit of (N is an integer) doubly, above-mentioned the 4th step, carry out the control of the travel(l)ing phase of above-mentioned light beam, make that the crest value of the regenerated signal of above-mentioned light beam when crossing above-mentioned two outside reference phase pits is consistent being advisable of the moment of peak swing with above-mentioned light beam.

According to this structure, the N+0.5 of 1 channel bit of the record symbol that being pre-formed in the track at the two ends in one group of track staggers mutually writes down in orbital direction is the outside reference phase pit of (N is an integer) doubly.Then, carry out the control of the travel(l)ing phase of light beam, the crest value that makes the regenerated signal of light beam when crossing two outside reference phase pits and light beam are that the moment of peak swing is consistent.

Therefore, the crest value of the regenerated signal the during outside reference phase pit that forms by the track that makes light beam be transverse in the two ends of one group of track is constantly consistent with the peak swing of light beam, can carry out suitable control to the mobile phase place of light beam.

In above-mentioned tracing control method, be pre-formed the central reference phase pit in the central orbit in above-mentioned one group of track, above-mentioned the 4th step, carry out the control of the travel(l)ing phase of above-mentioned light beam, make that the crest value of the regenerated signal when crossing above-mentioned central reference phase pit is 0 degree phase place or 180 consistent being advisable of the moment of spending phase places with the moving period of above-mentioned light beam.

According to this structure, be pre-formed the central reference phase pit in the central orbit in one group of track.Then, carry out the control of the travel(l)ing phase of light beam, the crest value that makes the regenerated signal when crossing the central reference phase pit and the moving period of light beam are that the moment of 0 degree phase place or 180 degree phase places is consistent.

Therefore, the crest value of the regenerated signal when making light beam be transverse in the central reference phase pit that forms in one group of central orbit in the track and the moving period of light beam are that the moment of 0 degree phase place or 180 degree phase places is consistent, can carry out suitable control to the travel(l)ing phase of light beam.

In above-mentioned tracing control method, above-mentioned first step, central orbit in above-mentioned one group of track is carried out Tracing Control, under the state in departure is converged in the scope of appointment, detect the cycle and the phase place of vibration cycle and vibration phase place or above-mentioned central reference phase pit, and move control signal based on the track that the cycle and the phase place of detected above-mentioned vibration cycle and above-mentioned vibration phase place or central reference phase pit generates the initial stage in above-mentioned second step and be advisable.

According to this structure, the central orbit in one group of track is carried out Tracing Control, under the state in departure is converged in the scope of appointment, detect the cycle and the phase place of vibration cycle and vibration phase place or central reference phase pit.Then, generate the track at the initial stage in second step based on cycle of detected vibration cycle and vibration phase place or central reference phase pit and phase place and move control signal.

Therefore, when when central orbit trembles or in central orbit, writing down the central reference phase pit, the track that generates the phase place of control bundle track moving period moves control signal, this track is moved frequency and the phase place and the vibration or identical of control signal with the central reference phase pit, initial stage signal when it is controlled as the amplitude in second step uses the shortening of asking in the time of can seeking to control.

Optical recording apparatus provided by the invention comprises: laser instrument; With record data and track centre signal is input, the luminous power of above-mentioned laser instrument is controlled to be the laser power control circuit of pulse type; The laser beam transformation that will be penetrated by above-mentioned laser instrument is the collimation lens of directional light; Based on the refractive index control signal that is used to make laser in the track that specifies number of adjacency, periodically to move, make via the directional light of above-mentioned collimation lens conversion EO diffraction element to the radial direction refraction of optical record medium with the track of appointment; The directional light optically focused that will be reflected by above-mentioned EO diffraction element, and in optical record medium, have the object lens that form the optically focused luminous point on the track of recording layer; Reception is from the reflected light of above-mentioned optically focused luminous point, and with the tracking error testing circuit of the above-mentioned track centre signal output of the central authorities of tracking error signal and the above-mentioned track of expression; With above-mentioned tracking error signal is input, and above-mentioned refractive index control signal is outputed to the refraction control circuit of above-mentioned EO diffraction element; With above-mentioned tracking error signal is input, with the amplitude central authorities error-detector circuit of the central authorities of the amplitude after the above-mentioned tracking error signal averaging of input within the fixed period error signal output; Actuator based on the above-mentioned object lens of above-mentioned amplitude central authorities' error signal drives.

According to this structure, laser power control circuit is input with record data and track centre signal, and the luminous power of laser instrument is controlled to be pulse type.The laser beam transformation that collimation lens will penetrate from laser instrument is a directional light.The EO diffraction element is based on the refractive index control signal that is used to make laser periodically to move with the track of appointment in the track that specifies number of adjacency, makes via the radial direction refraction to optical record medium of the directional light of collimation lens conversion.Object lens will be by the directional light optically focused of EO diffraction element refraction, has on the track of recording layer to form the optically focused luminous point in optical record medium.The tracking error testing circuit will receive from the reflected light of optically focused luminous point, the track centre signal of output tracking error signal and expression track centre.The refraction control circuit is input with the tracking error signal, will be used to make light beam to output to the EO refracting element with the periodically mobile refractive index control signal of the track of appointment in the track that specifies number of adjacency.Amplitude central authorities error-detector circuit is input with the tracking error signal, and the central authorities of the amplitude after the tracking error signal averaging of input within the fixed period error signal is outputed to actuator.Actuator is based on amplitude central authorities error signal drives object lens.

Therefore, during each track of the track that specifies number by crossing adjacency at light beam central the power of light beam controlled and make it be the record that pulse type carries out data, can shorten the needed time of record data, can improve transfer rate.

In addition, in above-mentioned optical recording apparatus, above-mentioned refraction control circuit comprises: the track moving period signal in the cycle that track moves is input with above-mentioned tracking error signal and expression light beam, and output amplitude control signal, fractional frequency signal and pit phase-detection are selected the amplitude detecting circuit of signal; With above-mentioned tracking error signal is input, the vibration testing circuit of output track moving reference signal; With above-mentioned track moving reference signal and above-mentioned fractional frequency signal is input, the frequency comparison circuit of output frequency control signal; With above-mentioned track moving reference signal and above-mentioned fractional frequency signal is input, the phase-comparison circuit of output phase comparison signal; It is input that regenerated signal that generates with the reflected light that receives from above-mentioned optically focused luminous point and above-mentioned pit phase-detection are selected signal and above-mentioned fractional frequency signal, the pit phase detecting circuit of output pit phase error signal; Is input with above-mentioned amplitude ratio than signal, said frequencies comparison signal, above-mentioned comparison of signal phase, above-mentioned pit comparison of signal phase and selection signal, the selection circuit of output VCO control signal; With above-mentioned VCO control signal and above-mentioned amplitude control signal is input, exports the VCO of above-mentioned refraction control signal and above-mentioned track moving period signal; With above-mentioned amplitude control signal, said frequencies comparison signal, above-mentioned comparison of signal phase and above-mentioned pit phase error signal is input, and the selection control circuit that above-mentioned selection signal is outputed to above-mentioned selection circuit is advisable.

In addition, in above-mentioned optical recording apparatus, above-mentioned amplitude detecting circuit comprises: with above-mentioned tracking error signal and above-mentioned track moving period signal is input, the peak valley detection counter that the crest value of the tracking error signal during the above-mentioned track moving period signal indication is counted repeatedly; When the value of above-mentioned peak valley detection counter reached the value of appointment at one-period, the ripple end level ratio of two count values of output expression appointment allowed the sequence control circuit of signal; Allowing signal with above-mentioned tracking error signal and above-mentioned ripple end level ratio is input, output be illustrated in that above-mentioned ripple end level ratio allows that signal is asserted the 1st during the maximal value of above-mentioned tracking error signal be advisable with the ripple end level comparison circuit of the amplitude control signal of the difference of the minimum value of the above-mentioned tracking error signal during the different the 2nd during with the above-mentioned the 1st.

In addition, in above-mentioned optical recording apparatus, above-mentioned amplitude detecting circuit also comprises, output be illustrated in the light beam that track moves track the crest part cycle the crest periodic signal and be illustrated in the peak valley testing circuit of trough periodic signal in cycle of trough part of the track of the light beam that track moves, wherein, above-mentioned pit phase detecting circuit comprises: with above-mentioned crest periodic signal, above-mentioned trough periodic signal, above-mentioned regenerated signal and above-mentioned pit phase-detection select signal to be input, detect the crest value of selecting the regenerated signal during signal is asserted in above-mentioned pit phase-detection, and with the peak detection circuit of peak detection signal output; The phase place of more above-mentioned peak detection signal, above-mentioned crest periodic signal and above-mentioned trough periodic signal is advisable the pit phase-comparison circuit of above-mentioned pit phase error signal output.

In addition, in above-mentioned optical recording apparatus, above-mentioned sequence control circuit will represent that the record during the track of appointment moves allows signal output, it is input that above-mentioned laser power control circuit allows signal, above-mentioned record data and above-mentioned orbit centre signal with above-mentioned record, when above-mentioned record allows signal and above-mentioned track centre signal to be asserted simultaneously, luminous power according to the above-mentioned laser instrument of above-mentioned record data is controlled to be recording power, when above-mentioned record allows signal to be cancelled (Negate) luminous power of above-mentioned laser instrument is controlled to be regenerating power and is advisable.Also have, above-mentioned optical recording apparatus also comprises, allowing signal with above-mentioned track centre signal, above-mentioned regenerated signal and above-mentioned record is input, allows signal to be cancelled and above-mentioned track centre signal when being asserted at above-mentioned record, and the AD converter that regenerated signal is sampled is advisable.

Optical regeneration device provided by the invention comprises: laser instrument; The luminous power of above-mentioned laser instrument is controlled to be the laser power control circuit of designated value; The laser beam transformation that will be penetrated by above-mentioned laser instrument is the collimation lens of directional light; Based on being used to laser track with appointment in the track that specifies number of adjacency is periodically moved, and moving period that makes laser and the corresponding to refractive index control signal of 1 channel bit period that is recorded in the record symbol of orbital direction make via the directional light of the above-mentioned collimation lens conversion EO diffraction element to the radial direction refraction of optical record medium; The directional light optically focused that will be reflected by above-mentioned EO diffraction element, and in optical record medium, have the object lens that form the optically focused luminous point on the track of recording layer; Reception is from the reflected light of above-mentioned optically focused luminous point, and with the above-mentioned track centre signal of the central authorities of tracking error signal and the above-mentioned track of expression and the tracking error testing circuit of regenerated signal output; With above-mentioned tracking error signal is input, and above-mentioned refractive index control signal is outputed to the refraction control circuit of above-mentioned EO diffraction element; With above-mentioned tracking error signal is input, with the amplitude central authorities error-detector circuit of the central authorities of the amplitude after the above-mentioned tracking error signal averaging of input within the fixed period error signal output; Actuator based on the above-mentioned object lens of above-mentioned amplitude central authorities' error signal drives; With above-mentioned track centre signal and above-mentioned regenerated signal is input, when above-mentioned track centre signal is asserted, to the sampling of above-mentioned regenerated signal and with the analog-digital converter of playback of data output.

According to this structure, laser power control circuit is controlled to be designated value with the luminous power of laser instrument.The laser beam transformation that collimation lens will penetrate from laser instrument is a directional light.The EO diffraction element periodically moves laser track with appointment in the track that specifies number of adjacency based on being used to, and make the moving period of laser and the refractive index control signal of the cycle basically identical of a channel bit of the record symbol that is recorded in orbital direction, the directional light via the collimation lens conversion is reflected to the radial direction of optical record medium.The directional light optically focused that object lens will be reflected by the EO diffraction element, and in optical record medium, have on the track of recording layer and form the optically focused luminous point.The tracking error testing circuit will receive from the reflected light of optically focused luminous point, the track centre signal and the regenerated signal of output tracking error signal and expression track centre.The refraction control circuit is input with the tracking error signal, to EO diffraction element output refractive index control signal.Amplitude central authorities error-detector circuit is input with the tracking error signal, and the central authorities of the amplitude after the tracking error signal averaging that will import within the fixed period error signal outputs to actuator.Actuator is based on amplitude central authorities error signal drives object lens.Analog-digital converter is input with track centre signal and regenerated signal, when the track centre signal is asserted, to the regenerated signal output playback of data of sampling.

Therefore, laser a channel bit intercycle move, the luminous power of control laser instrument is carried out the regeneration of data when crossing track centre by laser, the data that can regenerative high-density ground write down.

In addition, in above-mentioned optical regeneration device, above-mentioned refraction control circuit comprises: with above-mentioned tracking error signal and track moving period signal is input, and output amplitude control signal, fractional frequency signal and pit phase-detection are selected the amplitude detecting circuit of signal; With above-mentioned tracking error signal is input, the vibration testing circuit of output track moving reference signal; With above-mentioned track moving reference signal and above-mentioned fractional frequency signal is input, the frequency comparison circuit of output frequency control signal; With above-mentioned track moving reference signal and above-mentioned fractional frequency signal is input, the phase-comparison circuit of output phase comparison signal; Selecting signal and above-mentioned fractional frequency signal with above-mentioned regenerated signal, above-mentioned pit phase-detection is input, the pit phase detecting circuit of output pit phase error signal; Is input with above-mentioned amplitude ratio than signal, said frequencies comparison signal, above-mentioned comparison of signal phase, above-mentioned pit comparison of signal phase and selection signal, the selection circuit of output VCO control signal; With above-mentioned VCO control signal and above-mentioned amplitude control signal is input, exports the VCO of above-mentioned refraction control signal and above-mentioned track moving period signal; With above-mentioned amplitude control signal, said frequencies comparison signal, above-mentioned comparison of signal phase and above-mentioned pit phase error signal is input, and the selection control circuit that above-mentioned selection signal is outputed to above-mentioned selection circuit is advisable.

In addition, in above-mentioned optical regeneration device, above-mentioned amplitude detecting circuit comprises, with above-mentioned tracking error signal and above-mentioned track moving period signal is input, the peak valley detection counter that the crest value of the tracking error signal during the above-mentioned track moving period signal indication is counted repeatedly; When the value of above-mentioned peak valley detection counter reached the value of appointment at one-period, the ripple end level ratio of two count values of output expression appointment allowed the sequence control circuit of signal; Allowing signal with above-mentioned tracking error signal and above-mentioned ripple end level ratio is input, output be illustrated in that above-mentioned ripple end level ratio allows that signal is asserted the 1st during the maximal value of above-mentioned tracking error signal be advisable with the ripple end level comparison circuit of the amplitude control signal of the difference of the minimum value of the above-mentioned tracking error signal during the different the 2nd during with the above-mentioned the 1st.

In addition, in above-mentioned optical regeneration device, above-mentioned amplitude detecting circuit also comprises, output be illustrated in the light beam that track moves track the crest part cycle the crest periodic signal and be illustrated in the peak valley testing circuit of trough periodic signal in cycle of trough part of the track of the light beam that track moves, wherein, above-mentioned pit phase detecting circuit comprises, with above-mentioned crest periodic signal, above-mentioned trough periodic signal, above-mentioned regenerated signal and above-mentioned pit phase-detection select signal to be input, detect the crest value of selecting the regenerated signal during signal is asserted in above-mentioned pit phase-detection, and with the peak detection circuit of peak detection signal output; The phase place of more above-mentioned peak detection signal, above-mentioned crest periodic signal and above-mentioned trough periodic signal is advisable the pit phase-comparison circuit of above-mentioned pit phase error signal output.

Optical recording control circuit provided by the invention comprises: with record data and track centre signal is input, the luminous power of laser instrument is controlled to be the laser power control circuit of pulse type; Reception is from the reflected light of the optically focused luminous point on the track that will have recording layer by object lens by the laser focusing that above-mentioned EO diffraction element is reflected in optical record medium, and with the tracking error testing circuit of the above-mentioned track centre signal output of the central authorities of tracking error signal and the above-mentioned track of expression; With above-mentioned tracking error signal is input, will be used to make laser to output to the refraction control circuit of above-mentioned EO diffraction element with the periodically mobile refractive index control signal of the track of appointment in the track that specifies number of adjacency; With above-mentioned tracking error signal is input, the central authorities of the amplitude after the above-mentioned tracking error signal averaging of input within the fixed period error signal is outputed to the amplitude central authorities error-detector circuit of the actuator that drives above-mentioned object lens.

According to this structure, laser power control circuit is input with record data and track centre signal, and the luminous power of laser instrument is controlled to be pulse type.The tracking error testing circuit, reception has the reflected light of optically focused luminous point of the track of recording layer, the track centre signal of output tracking error signal and expression track centre in the optical record medium from the laser focusing that will be reflected by the EO diffraction element by object lens.The refraction control circuit is input with the tracking error signal, will be used to make laser to output to the EO refracting element with the periodically mobile refractive index control signal of the track of appointment in the track that specifies number of adjacency.Amplitude central authorities error-detector circuit is input with the tracking error signal, and the central authorities of the amplitude after the tracking error signal averaging of input within the fixed period error signal is outputed to the actuator that drives object lens.

Therefore, during each track of the track that specifies number by crossing adjacency at light beam central the power of light beam controlled and make it be the record that pulse type carries out data, can shorten the needed time of record data, can improve transfer rate.

In addition, in above-mentioned optical recording control circuit, above-mentioned refraction control circuit comprises: with above-mentioned tracking error signal and track moving period signal is input, and output amplitude control signal, fractional frequency signal and pit phase-detection are selected the amplitude detecting circuit of signal; With above-mentioned tracking error signal is input, the vibration testing circuit of output track moving reference signal; With above-mentioned track moving reference signal and above-mentioned fractional frequency signal is input, the frequency comparison circuit of output frequency control signal; With above-mentioned track moving reference signal and above-mentioned fractional frequency signal is input, the phase-comparison circuit of output phase comparison signal; The regenerated signal, above-mentioned pit phase-detection selection signal and the above-mentioned fractional frequency signal that generate with the reflected light that receives above-mentioned optically focused luminous point are input, the pit phase detecting circuit of output pit phase error signal; Is input with above-mentioned amplitude ratio than signal, said frequencies comparison signal, above-mentioned comparison of signal phase, above-mentioned pit comparison of signal phase and selection signal, the selection circuit of output VCO control signal; With above-mentioned VCO control signal and above-mentioned amplitude control signal is input, exports the VCO of above-mentioned refraction control signal and above-mentioned track moving period signal; With above-mentioned amplitude control signal, said frequencies comparison signal, above-mentioned comparison of signal phase and above-mentioned pit phase error signal is input, and the selection control circuit that above-mentioned selection signal is outputed to above-mentioned selection circuit is advisable.

In addition, in above-mentioned optical recording control circuit, above-mentioned amplitude detecting circuit comprises, with above-mentioned tracking error signal and above-mentioned track moving period signal is input, the peak valley detection counter that the crest value of the tracking error signal during the above-mentioned track moving period signal indication is counted repeatedly; When one-period reached the value of appointment, the ripple end level ratio of two count values of output expression appointment allowed the sequence control circuit of signal in the value of above-mentioned peak valley detection counter; Allowing signal with above-mentioned tracking error signal and above-mentioned ripple end level ratio is input, output be illustrated in that above-mentioned ripple end level ratio allows that signal is asserted the 1st during the maximal value of above-mentioned tracking error signal be advisable with the ripple end level comparison circuit of the amplitude control signal of the difference of the minimum value of the above-mentioned tracking error signal during the different the 2nd during with the above-mentioned the 1st.

In addition, in above-mentioned optical recording control circuit, above-mentioned amplitude detecting circuit also comprises, output be illustrated in the light beam that track moves track the crest part cycle the crest periodic signal and be illustrated in the peak valley testing circuit of trough periodic signal in cycle of trough part of the track of the light beam that track moves, wherein, above-mentioned pit phase detecting circuit comprises, with above-mentioned crest periodic signal, above-mentioned trough periodic signal, above-mentioned regenerated signal and above-mentioned pit phase-detection select signal to be input, detect the crest value of selecting the regenerated signal during signal is asserted in above-mentioned pit phase-detection, and with the peak detection circuit of peak value output; The phase place of more above-mentioned peak detection signal, above-mentioned crest periodic signal and above-mentioned trough periodic signal is advisable the pit phase-comparison circuit of above-mentioned pit phase error signal output.

In addition, in above-mentioned optical recording control circuit, above-mentioned sequence control circuit will represent that the record during the track of appointment moves allows signal output, it is input that above-mentioned laser power control circuit allows signal, above-mentioned record data and above-mentioned orbit centre signal with above-mentioned record, when above-mentioned record allows signal and above-mentioned track centre signal to be asserted simultaneously, according to above-mentioned record data the luminous power of above-mentioned laser instrument is controlled to be recording power, when above-mentioned record allows signal to be cancelled the luminous power of above-mentioned laser instrument is controlled to be regenerating power and is advisable.Also have, above-mentioned optical recording control circuit also comprises, allowing signal with above-mentioned track centre signal, above-mentioned regenerated signal and above-mentioned record is input, allows signal to be cancelled and above-mentioned track centre signal is advisable to the analog-digital converter that regenerated signal is sampled when being asserted at above-mentioned record.

Optical regeneration control circuit provided by the invention comprises: the laser power control circuit that the luminous power of laser instrument is controlled to be designated value; Reception is from the reflected light of the optically focused luminous point on the track that will have recording layer by object lens by the laser focusing that above-mentioned EO diffraction element is reflected in optical record medium, and with the above-mentioned track centre signal of tracking error signal and the above-mentioned track centre of expression and the tracking error testing circuit of regenerated signal output; With above-mentioned tracking error signal is input, to be used to make laser track with appointment in the track that specifies number of adjacency periodically to move, and the moving period that makes laser and the corresponding to refractive index control signal of 1 channel bit period that is recorded in the record symbol of orbital direction output to the refraction control circuit of above-mentioned EO diffraction element; With above-mentioned tracking error signal is input, the central authorities of the amplitude after the above-mentioned tracking error signal averaging of input within the fixed period error signal is outputed to the amplitude central authorities error-detector circuit of the actuator that drives above-mentioned object lens; With above-mentioned track centre signal and above-mentioned regenerated signal is input, when above-mentioned track centre signal is asserted, to the sampling of above-mentioned regenerated signal and with the analog-digital converter of playback of data output.

According to this structure, laser power control circuit is controlled to be designated value with the luminous power of laser instrument.The tracking error testing circuit, reception has the reflected light of optically focused luminous point of the track of recording layer, the track centre signal and the regenerated signal of output tracking error signal and expression track centre in the optical record medium from the laser focusing that will be reflected by the EO diffraction element by object lens.The refraction control circuit, with the tracking error signal is input, to be used to make laser track with appointment in the track that specifies number of adjacency periodically to move, and make the moving period of laser and the corresponding to refractive index control signal of 1 channel bit period that is recorded in the record symbol of orbital direction output to the EO diffraction element.Amplitude central authorities error-detector circuit is input with the tracking error signal, and the central authorities of the amplitude after the tracking error signal averaging of input within the fixed period error signal is outputed to the actuator that drives object lens.Analog-digital converter is at input track centre signal and regenerated signal, when the track centre signal is asserted to the regenerated signal output playback of data of sampling.

Therefore, laser a channel bit intercycle move, the luminous power of control laser instrument is carried out the regeneration of data when crossing track centre by laser, the data that can regenerative high-density ground write down.

In addition, in above-mentioned optical regeneration control circuit, above-mentioned refraction control circuit comprises: with above-mentioned tracking error signal and track moving period signal is input, and output amplitude control signal, fractional frequency signal and pit phase-detection are selected the amplitude detecting circuit of signal; With above-mentioned tracking error signal is input, the vibration testing circuit of output track moving reference signal; With above-mentioned track moving reference signal and above-mentioned fractional frequency signal is input, the frequency comparison circuit of output frequency control signal; With above-mentioned track moving reference signal and above-mentioned fractional frequency signal is input, the phase-comparison circuit of output phase comparison signal; Selecting signal and above-mentioned fractional frequency signal with above-mentioned regenerated signal, above-mentioned pit phase-detection is input, the pit phase detecting circuit of output pit phase error signal; Is input with above-mentioned amplitude ratio than signal, said frequencies comparison signal, above-mentioned comparison of signal phase, above-mentioned pit comparison of signal phase and selection signal, the selection circuit of output VCO control signal; With above-mentioned VCO control signal and above-mentioned amplitude control signal is input, exports the VCO of above-mentioned refraction control signal and above-mentioned track moving period signal; With above-mentioned amplitude control signal, said frequencies comparison signal, above-mentioned comparison of signal phase and above-mentioned pit phase error signal is input, and the selection control circuit that above-mentioned selection signal is outputed to above-mentioned selection circuit is advisable.

In addition, in above-mentioned optical regeneration control circuit, above-mentioned amplitude detecting circuit comprises, with above-mentioned tracking error signal and above-mentioned track moving period signal is input, the peak valley detection counter that the crest value of the tracking error signal during the above-mentioned track moving period signal indication is counted repeatedly; When the value of above-mentioned peak valley detection counter reached the value of appointment at one-period, the ripple end level ratio of two count values of output expression appointment allowed the sequence control circuit of signal; Allowing signal with above-mentioned tracking error signal and above-mentioned ripple end level ratio is input, output be illustrated in that above-mentioned ripple end level ratio allows that signal is asserted the 1st during the maximal value of above-mentioned tracking error signal be advisable with the ripple end level comparison circuit of the amplitude control signal of the difference of the minimum value of the above-mentioned tracking error signal during the different the 2nd during with the above-mentioned the 1st.

In addition, in above-mentioned optical regeneration control circuit, above-mentioned amplitude detecting circuit also comprises, output be illustrated in the light beam that track moves track the crest part cycle the crest periodic signal and be illustrated in the peak valley testing circuit of trough periodic signal in cycle of trough part of the track of the light beam that track moves, wherein, above-mentioned pit phase detecting circuit comprises, with above-mentioned crest periodic signal, above-mentioned trough periodic signal, above-mentioned regenerated signal and above-mentioned pit phase-detection select signal to be input, detect the crest value of selecting the regenerated signal during signal is asserted in above-mentioned pit phase-detection, and with the peak detection circuit of peak detection signal output; The phase place of more above-mentioned peak detection signal, above-mentioned crest periodic signal and above-mentioned trough periodic signal is advisable the pit phase-comparison circuit of above-mentioned pit phase error signal output.

Utilizability on the industry

Optical recording control method involved in the present invention, optical recording control circuit, optical reproduction control method, optics are again Give birth to control circuit, optical record medium, tracing control method, Tracing Control circuit, optical recording method, optical recording dress The record that put, optical reproduction method, optical regeneration device can be used for numerical data and regeneration etc.

Claims (44)

1. optical recording control method is characterized in that comprising:

The mobile indication step that the indication light beam periodically moves with the track of appointment in the track that specifies number with adjacency is above-mentioned one group of track of one group;

Indication is controlled the intensity that makes this power be pulse type when above-mentioned light beam crosses above-mentioned each track central and reach appointment to the power of above-mentioned light beam, and data are recorded in record indication step in above-mentioned one group of track.

2. optical recording control method according to claim 1 is characterized in that: the moving period of the above-mentioned light beam that moves in above-mentioned one group of track is consistent with 1 channel bit period of record symbol on being recorded in orbital direction.

3. optical recording control method according to claim 1 and 2 is characterized in that: above-mentioned one group of track is made of the odd number track.

4. according to each described optical recording control method in the claim 1 to 3, it is characterized in that: the track of the above-mentioned light beam that moves in above-mentioned one group of track is a triangular wave.

5. according to each described optical recording control method in the claim 1 to 3, it is characterized in that: the track of the above-mentioned light beam that moves in above-mentioned one group of track is sinusoidal wave.

6. optical recording control method according to claim 3 is characterized in that:

Above-mentioned record indication step, indication is controlled the intensity that is pulse type when making the track of this power beyond above-mentioned light beam crosses the two ends of above-mentioned one group of track central and reaches appointment to the power of above-mentioned light beam, and data is recorded in the track beyond the two ends of above-mentioned one group of track.

7. according to each described optical recording control method in the claim 1 to 6, it is characterized in that also comprising: regeneration indication step, wherein,

Above-mentioned record indication step, being above-mentioned pulse type in 90 degree phase places to the 270 degree phase range and reaching the intensity of appointment of moving period of the above-mentioned light beam that makes that this power moves in above-mentioned one group of track controlled in indication to the power of above-mentioned light beam, and data are recorded in the two ends track in addition of above-mentioned one group of track or above-mentioned one group of track

Above-mentioned regeneration indication step, the above-mentioned light beam that makes that this power moves in above-mentioned one group of track is controlled in indication to the power of above-mentioned light beam spending from 270 degree phase places to 90 of moving period is regenerating power in the phase range, and the regenerated signal that the reflected light that receives above-mentioned light beam during to the track beyond at the two ends of crossing above-mentioned one group of track or above-mentioned one group of track central generates is sampled the data in the track of regenerative recording beyond the two ends of above-mentioned one group of track or above-mentioned one group of track.

8. optical reproduction control method is characterized in that comprising:

The mobile indication step that the indication light beam periodically moves with the track of appointment in the track that specifies number with adjacency is above-mentioned one group of track of one group;

Indication receives the regenerated signal that the reflected light of above-mentioned light beam generates when crossing above-mentioned track central at above-mentioned light beam and samples, and the regeneration of the data of regenerative recording in above-mentioned one group of track indication step, wherein,

Consistent in cycle of the above-mentioned light beam that moves on above-mentioned one group of track with 1 channel bit period of record symbol on being recorded in orbital direction.

9. optical reproduction control method according to claim 8 is characterized in that: above-mentioned one group of track is made of the odd number track.

10. it is characterized in that according to Claim 8 or 9 described optical reproduction control methods: the track of the above-mentioned light beam that moves in above-mentioned one group of track is a triangular wave.

11. according to Claim 8 or 9 described optical reproduction control methods, it is characterized in that: the track of the above-mentioned light beam that moves in above-mentioned one group of track is sinusoidal wave.

12. each described optical reproduction control method in 11 according to Claim 8 is characterized in that:

Above-mentioned regeneration indication step, indication receives the regenerated signal that the reflected light of above-mentioned light beam generates during to the track beyond the two ends of crossing above-mentioned one group of track at above-mentioned light beam central and samples, and the data in the track of regenerative recording beyond the two ends of above-mentioned one group of track.

13. each described optical reproduction control method in 12 according to Claim 8 is characterized in that: above-mentioned regeneration indication step,

The above-mentioned light beam that makes that this power moves in above-mentioned one group of track is controlled in indication to the power of above-mentioned light beam spending from 90 degree phase places to 270 of moving period is regenerating power in the phase range, and the regenerated signal that the reflected light that receives above-mentioned light beam during to the track beyond at the two ends of crossing above-mentioned one group of track or above-mentioned one group of track central generates is sampled the data in the track of regenerative recording beyond the two ends of above-mentioned one group of track or above-mentioned one group of track;

The above-mentioned light beam that makes that this power moves in above-mentioned one group of track is controlled in indication to the power of above-mentioned light beam spending from 270 degree phase places to 90 of moving period is regenerating power in the phase range, and above-mentioned regenerated signal is sampled the data in the track of regenerative recording beyond the two ends of above-mentioned one group of track or above-mentioned one group of track during track central beyond at the two ends of crossing above-mentioned one group of track or above-mentioned one group of track.

14. an optical record medium is characterized in that comprising: track and recording layer, wherein,

With the above-mentioned track formation group that specifies number of adjacency, two tracks of central orbit in above-mentioned one group of track or central authorities are with the amplitude and the fibrillation cycle of appointment.

15. an optical record medium is characterized in that comprising: track and recording layer, wherein,

With the above-mentioned track formation group that specifies number of adjacency, above-mentioned group interval of adjacency is wideer than the orbital spacing in above-mentioned group.

16., it is characterized in that according to claim 14 or 15 described optical record mediums:

The track at the two ends of above-mentioned one group of track is linearly,

Track vibration beyond the two ends of above-mentioned one group of track.

17., it is characterized in that according to each described optical record medium in the claim 14 to 16:

The vibration cycle of above-mentioned track is the integral multiple of light beam in the cycle that above-mentioned one group of track moves.

18. optical record medium according to claim 17 is characterized in that:

The vibration cycle of above-mentioned track is the integral multiple of above-mentioned light beam in 1 channel bit of the record symbol that above-mentioned track write down.

19. optical record medium according to claim 18 is characterized in that:

In the track at the two ends of above-mentioned one group of track, stagger mutually the above-mentioned channel bit period N+0.5 cycle, form the reference phase pit, wherein, N is an integer.

20. an optical record medium is characterized in that comprising: track and a plurality of recording layer, wherein,

Above-mentioned track has as the identical structure of each described optical record medium in the claim 14 to 19 apart from the plane of incidence layer farthest of above-mentioned light beam.

21. a tracing control method is characterized in that comprising:

The track that specifies number with adjacency is one group, the central orbit in above-mentioned one group of track is carried out the first step of Tracing Control;

Central authorities with the central orbit in above-mentioned one group of track are the center, the mobile amplitude of periodically mobile above-mentioned light beam are controlled at second step of appointment size;

Will above-mentioned one group of track intercycle the moving period of the above-mentioned light beam that moves be controlled at the third step of designated period;

Will above-mentioned one group of track intercycle the travel(l)ing phase of the above-mentioned light beam that moves be controlled to be the 4th step of the designated phase of the assigned address in above-mentioned one group of track.

22. tracing control method according to claim 21, it is characterized in that: above-mentioned second step, will above-mentioned one group of track intercycle the tracking error signal of the 0 degree phase place of moving period of the above-mentioned light beam that moves and 180 degree phase places detect with the skew at the center of periodically moving of above-mentioned light beam as the central authorities of the central orbit in above-mentioned one group of track, and carry out the center of moving of above-mentioned light beam is controlled.

23. tracing control method according to claim 21, it is characterized in that: above-mentioned second step, the tracking error signal that will carry out integration with the reasonable time constant detects as the skew at the center of periodically moving of the central authorities of the central orbit in above-mentioned one group of track and above-mentioned light beam, and carries out the center of the moving control to above-mentioned light beam.

24. tracing control method according to claim 21, it is characterized in that: above-mentioned second step, crest number by the tracking error signal in the moving period that makes periodically the above-mentioned light beam that moves is controlled the mobile amplitude of above-mentioned light beam for specifying number.

25. tracing control method according to claim 21, it is characterized in that: above-mentioned second step, in the tracking error signal in a moving period of the above-mentioned light beam that periodically moves, control the amplitude that moves of above-mentioned light beam with the differential wave of the tracking error signal of two peak swings parts in the moving of above-mentioned light beam.

26., it is characterized in that according to each described tracing control method in the claim 22 to 25: above-mentioned third step,

By detecting the vibration detection signal that the tracking error signal in designated phase that periodically move of above-mentioned light beam in above-mentioned one group of track generates above-mentioned one group of track;

Generate the track moving reference signal of frequency of the appointment integral multiple of above-mentioned vibration detection signal;

Crest part by will detecting above-mentioned tracking error signal and trough peak valley detection signal partly carry out frequency division with designation number and generate fractional frequency signal;

Carry out the moving period of above-mentioned light beam is controlled with the value that the frequency of above-mentioned track moving reference signal is compared with the frequency of above-mentioned fractional frequency signal.

27., it is characterized in that according to each described tracing control method in the claim 22 to 25: above-mentioned third step,

By the tracking error signal when mobile carries out the vibration detection signal that integration generates above-mentioned one group of track with the time constant of appointment on above-mentioned one group of track intercycle ground with above-mentioned light beam;

Generate the track moving reference signal of frequency of the appointment integral multiple of above-mentioned vibration detection signal;

Crest part by will detecting above-mentioned tracking error signal and trough peak valley detection signal partly carry out frequency division with designation number and generate fractional frequency signal;

Carry out the moving period of above-mentioned light beam is controlled with the value that the frequency of above-mentioned track moving reference signal is compared with the frequency of above-mentioned fractional frequency signal.

28., it is characterized in that according to claim 26 or 27 described tracing control methods:

The cycle of above-mentioned track moving reference signal, consistent with the integral multiple of 1 channel bit period of the record symbol that is recorded in orbital direction.

29., it is characterized in that according to each described tracing control method in the claim 26 to 28: above-mentioned the 4th step,

By detect above-mentioned one group of track intercycle the tracking error signal of the designated phase in the one-period of the above-mentioned light beam that moves generate the vibration detection signal of above-mentioned one group of track;

Generate the track moving reference signal of frequency of the appointment integral multiple of above-mentioned vibration detection signal;

Crest part by will detecting above-mentioned tracking error signal and trough peak valley detection signal partly carry out frequency division with designation number and generate fractional frequency signal;

Carry out the travel(l)ing phase of above-mentioned light beam is controlled with the value that the phase place of above-mentioned track moving reference signal is compared with the phase place of above-mentioned fractional frequency signal.

30., it is characterized in that according to each described tracing control method in the claim 26 to 28: above-mentioned the 4th step,

By the tracking error signal when mobile carries out the vibration detection signal that integration generates above-mentioned one group of track with the time constant of appointment on above-mentioned one group of track intercycle ground with above-mentioned light beam;

Generate the track moving reference signal of frequency of the appointment integral multiple of above-mentioned vibration detection signal;

Crest part by will detecting above-mentioned tracking error signal and trough peak valley detection signal partly carry out frequency division with designation number and generate fractional frequency signal;

Carry out the travel(l)ing phase of above-mentioned light beam is controlled with the value that the phase place of above-mentioned track moving reference signal is compared with the phase place of above-mentioned fractional frequency signal.

31., it is characterized in that according to each described tracing control method in the claim 26 to 28:

In the track at the two ends of above-mentioned one group of track, be pre-formed mutually the outside reference phase pit that doubly staggers with N+0.5 in 1 channel bit of the record symbol that orbital direction was write down, wherein, N is an integer,

Above-mentioned the 4th step is carried out the phase control that moves to above-mentioned light beam, makes that crest value and the above-mentioned light beam of the regenerated signal of above-mentioned light beam when crossing above-mentioned two outside reference phase pits are that moment of peak swing is consistent.

32., it is characterized in that according to each described tracing control method in the claim 26 to 28:

Be pre-formed the central reference phase pit in the central orbit in above-mentioned one group of track,

Above-mentioned the 4th step is carried out the phase control that moves to above-mentioned light beam, and it is consistent to make that crest value and the moving period of above-mentioned light beam of the regenerated signal when crossing above-mentioned central reference phase pit are that 0 degree phase place or 180 is spent moment of phase places.

33., it is characterized in that according to each described tracing control method in the claim 29 to 32:

Above-mentioned first step, central orbit in above-mentioned one group of track is carried out Tracing Control, under the state in departure is converged in the scope of appointment, detect the cycle and the phase place of vibration cycle and vibration phase place or above-mentioned central reference phase pit, and generate the track at the initial stage in above-mentioned second step based on cycle of detected above-mentioned vibration cycle and above-mentioned vibration phase place or central reference phase pit and phase place and move control signal.

34. an optical recording control circuit is characterized in that comprising:

The mobile instruction unit that the indication light beam periodically moves with the track of appointment in the track that specifies number with adjacency is above-mentioned one group of track of one group;

Indication is controlled the intensity that makes this power be pulse type when above-mentioned light beam crosses above-mentioned each track central and reach appointment to the power of above-mentioned light beam, and data are recorded in record instruction unit in above-mentioned one group of track.

35. an optical recording method is characterized in that comprising:

The mobile step that light beam is periodically moved with the track of appointment in the track that specifies number with adjacency is above-mentioned one group of track of one group;

The power of above-mentioned light beam is controlled the intensity that makes this power be pulse type when above-mentioned light beam crosses above-mentioned each track central and reach appointment, and data are recorded in the recording step of record data in above-mentioned one group of track.

36. an optical recording apparatus is characterized in that comprising:

The moving part that light beam is periodically moved with the track of appointment in the track that specifies number with adjacency is above-mentioned one group of track of one group;

The power of above-mentioned light beam is controlled the intensity that makes this power be pulse type when above-mentioned light beam crosses above-mentioned each track central and reach appointment, and data are recorded in the recording portion of record data in above-mentioned one group of track.

37. an optical regeneration control circuit is characterized in that:

The mobile instruction unit that the indication light beam periodically moves with the track of appointment in the track that specifies number with adjacency is above-mentioned one group of track of one group;

Indication receives the regenerated signal that the reflected light of above-mentioned light beam generates when crossing above-mentioned track central at above-mentioned light beam and samples, and the regeneration instruction unit of the data of regenerative recording in above-mentioned one group of track, wherein,

The cycle of the above-mentioned light beam that moves at above-mentioned one group of track, consistent with 1 channel bit period of the record symbol that is recorded in orbital direction.

38. an optical reproduction method is characterized in that comprising:

The mobile step that light beam is periodically moved with the track of appointment in the track that specifies number with adjacency is above-mentioned one group of track of one group;

Receive the regenerated signal that the reflected light of above-mentioned light beam generates when crossing above-mentioned track central at above-mentioned light beam and sample, and the regeneration step of the data of regenerative recording in above-mentioned one group of track, wherein,

The cycle of the above-mentioned light beam that moves at above-mentioned one group of track, consistent with 1 channel bit period of the record symbol that is recorded in orbital direction.

39. an optical regeneration device is characterized in that comprising:

The moving part that light beam is periodically moved with the track of appointment in the track that specifies number with adjacency is above-mentioned one group of track of one group;

The regenerated signal that the reflected light that receives above-mentioned light beam when above-mentioned light beam crosses above-mentioned track centre generates is sampled, and the reproducing unit of the data of regenerative recording in above-mentioned one group of track, wherein,

The cycle of the above-mentioned light beam that moves at above-mentioned one group of track, consistent with 1 channel bit period of the record symbol that is recorded in orbital direction.

40. a Tracing Control circuit is characterized in that comprising:

It to the track that specifies number the Tracing Control portion that central orbit in above-mentioned one group of track of one group carries out Tracing Control with adjacency;

Central authorities with the central orbit in above-mentioned one group of track are the center, the mobile amplitude of periodically mobile above-mentioned light beam are controlled to be the amplitude control part of appointment size;

Will above-mentioned one group of track intercycle the moving period of the above-mentioned light beam that moves be controlled at the periodic Control portion of designated period;

Will above-mentioned one group of track intercycle the travel(l)ing phase of the above-mentioned light beam that moves be controlled at the phase control division of the designated phase of the assigned address in above-mentioned one group of track.

41. an optical recording apparatus is characterized in that comprising:

Laser instrument;

With record data and track centre signal is input, the luminous power of above-mentioned laser instrument is controlled to be the laser power control circuit of pulse type;

The laser beam transformation that will be penetrated by above-mentioned laser instrument is the collimation lens of directional light;

Based on the refractive index control signal that is used to make laser in the track that specifies number of adjacency, periodically to move, make via the directional light of above-mentioned collimation lens conversion EO diffraction element to the radial direction refraction of optical record medium with the track of appointment;

The directional light optically focused that will be reflected by above-mentioned EO diffraction element, and in optical record medium, have the object lens that form the optically focused luminous point on the track of recording layer;

Reception is from the reflected light of above-mentioned optically focused luminous point, and with the tracking error testing circuit of the above-mentioned track centre signal output of the central authorities of tracking error signal and the above-mentioned track of expression;

Import above-mentioned tracking error signal, and above-mentioned refractive index control signal is outputed to the refraction control circuit of above-mentioned EO diffraction element;

Import above-mentioned tracking error signal, with the amplitude central authorities error-detector circuit of the central authorities of the amplitude after the above-mentioned tracking error signal averaging of input within the fixed period error signal output;

Actuator based on the above-mentioned object lens of above-mentioned amplitude central authorities' error signal drives.

42. an optical regeneration device is characterized in that comprising:

Laser instrument;

The luminous power of above-mentioned laser instrument is controlled to be the laser power control circuit of designated value;

The laser beam transformation that will be penetrated by above-mentioned laser instrument is the collimation lens of directional light;

Based on being used to laser track with appointment in the track that specifies number of adjacency is periodically moved, and moving period that makes laser and the corresponding to refractive index control signal of 1 channel bit period that is recorded in the record symbol of orbital direction make via the directional light of the above-mentioned collimation lens conversion EO diffraction element to the radial direction refraction of optical record medium;

The directional light optically focused that will be reflected by above-mentioned EO diffraction element, and in optical record medium, have the object lens that form the optically focused luminous point on the track of recording layer;

Drive the actuator of above-mentioned object lens;

Reception is from the reflected light of above-mentioned optically focused luminous point, and with the above-mentioned track centre signal of the central authorities of tracking error signal and the above-mentioned track of expression and the tracking error testing circuit of regenerated signal output;

With above-mentioned tracking error signal is input, and above-mentioned refractive index control signal is outputed to the refraction control circuit of above-mentioned EO diffraction element;

With above-mentioned tracking error signal is input, with the amplitude central authorities error-detector circuit of the central authorities of the amplitude after the above-mentioned tracking error signal averaging of input within the fixed period error signal output;

Actuator based on the above-mentioned object lens of above-mentioned amplitude central authorities' error signal drives;

With above-mentioned track centre signal and above-mentioned regenerated signal is input, when above-mentioned track centre signal is asserted, to the sampling of above-mentioned regenerated signal and with the analog-digital converter of playback of data output.

43. an optical recording control circuit is characterized in that comprising:

With record data and track centre signal is input, the luminous power of laser instrument is controlled to be the laser power control circuit of pulse type;

Reception is from the reflected light of the optically focused luminous point on the track that will have recording layer by object lens by the laser focusing that the EO diffraction element is reflected in optical record medium, and with the tracking error testing circuit of the above-mentioned track centre signal output of the central authorities of tracking error signal and the above-mentioned track of expression;

With above-mentioned tracking error signal is input, will be used to make laser to output to the refraction control circuit of above-mentioned EO diffraction element with the periodically mobile refractive index control signal of the track of appointment in the track that specifies number of adjacency;

With above-mentioned tracking error signal is input, the central authorities of the amplitude after the above-mentioned tracking error signal averaging of input within the fixed period error signal is outputed to the amplitude central authorities error-detector circuit of the actuator that drives above-mentioned object lens.

44. an optical regeneration control circuit is characterized in that comprising:

The luminous power of laser instrument is controlled to be the laser power control circuit of designated value;

Reception is from the reflected light of the optically focused luminous point on the track that will have recording layer by object lens by the laser focusing that the EO diffraction element is reflected in optical record medium, and with the track centre signal of tracking error signal and the above-mentioned track centre of expression and the tracking error testing circuit of regenerated signal output;

With above-mentioned tracking error signal is input, to be used to make laser track with appointment in the track that specifies number of adjacency periodically to move, and the moving period that makes laser and the corresponding to refractive index control signal of 1 channel bit period that is recorded in the record symbol of orbital direction output to the refraction control circuit of above-mentioned EO diffraction element;

With above-mentioned tracking error signal is input, the central authorities of the amplitude after the above-mentioned tracking error signal averaging of input within the fixed period error signal is outputed to the amplitude central authorities error-detector circuit of the actuator that drives above-mentioned object lens;

With above-mentioned track centre signal and above-mentioned regenerated signal is input, when above-mentioned track centre signal is asserted, to the sampling of above-mentioned regenerated signal and with the analog-digital converter of playback of data output.

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