CN1207821A - Optical disk apparatus - Google Patents
Optical disk apparatus Download PDFInfo
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- CN1207821A CN1207821A CN 96199655 CN96199655A CN1207821A CN 1207821 A CN1207821 A CN 1207821A CN 96199655 CN96199655 CN 96199655 CN 96199655 A CN96199655 A CN 96199655A CN 1207821 A CN1207821 A CN 1207821A
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Abstract
An optical disk apparatus for reproducing a signal (Sd) from a recording track formed in an optical disk by focusing a light spot on said recording track includes a calibration data generator. The calibration data generator having a plurality of a ROMs storing various calibration patterns (SP and SR) for causing said reproduced signal (Sd) to jitter. A calibration data recording controller controls the calibration data generator to selectively output a specific calibration pattern (SP) to the optical pickup unit (OS) to record said specific pattern (SP) to a calibration data track area of the optical disk.
Description
Technical field
The present invention relates to a kind of optical disc apparatus that information is recorded CD and reads from CD of being used for, particularly relate to and a kind ofly can correctly visit the optical disc apparatus that is formed at the recording channel on the described CD and is not subjected to the influence of CD tracker electricity distortion.
Background of invention
In recent years, CD has obtained developing as a kind of instrument of jumbo access data flourishingly.For the raising capacity, developed the method for many raising recording densitys now.And, just require to reduce to write down the interference between the indentation in order to reach high record density, improve signal to noise ratio (S/N ratio), and compensation is because the unstable caused distorted signals of CD media and optical disc apparatus.Especially, this wild effect mainly is because the physical deformation of CD and to be used for the circuit performance of optical disc apparatus caused.
Referring now to the first kind situation of Figure 44 explanation about the CD physical deformation.First-selection, it is plane to require CD D to remain when CD D is put on the cd-rom motor Md, and optical readout device Os can keep the record surface of its optical axis perpendicular to dish D in accessing operation like this.This optical readout device Os radially with the straight line LR of its line of CD radius on move (shown in arrow Dr among the figure) with the sweep record road.
But the outer that is positioned over the CD D on the cd-rom motor Md can be sagging because of its deadweight.In other words, CD D can form one coniform rather than keep plane.Strictly speaking, CD D radially reaches tangential direction and can bend.Therefore, because such deformation can take place CD D, then optical readout device Os just can not keep its optical axis vertical with the record surface of CD D when the sweep record road.And, the angle of cut of optical axis and card along with optical readout device Os with respect to the diverse location (on straight line LR) of CD D and change.
In this case, formed angle θ r is called " radial rake " between optical axis Ax and the CD D record surface.Formed angle θ t is called " tangential tilt " between the tangent line of optical axis Ax and the CD D recording channel straight line of radius (or the perpendicular to) LD.One dish, the radial rake θ r size of CD (as CD) is between-0.5 ° to 0.5 °.
Second kind of situation about circuit performance is such, even focusing on and tracking signal when showing that laser spots correctly focuses on and follows the tracks of, laser beam can not correctly focus on and follow the tracks of on the target record road.Therefore except resembling the such physical deformation of radial rake or tangential tilt, also to compensate this focusing error and tracking error.
Because above-mentioned unstable situation, when readout device can not make laser spots focus on the recording channel of being aimed at or follows the tracks of this recording channel.Especially, laser spots can focus between the two-phase neighboring trace, and the angle of the crossing sweep record road to change, and just scans the sub-fraction on the recording channel that is aligned.And then laser spots can not be followed the tracks of this recording channel, and may be with losing the recording channel that is aligned.Therefore, signal read be faced with crosstalk, amplitude deficiency, noise, waveform disturb and shake problems such as (asynchronous with original signal).The tracer signal of being read will be shaken like this.When this shake became big, the quality of read output signal will descend greatly.And the read error of optical readout device is misunderstood increase thereupon.
In Figure 45, showed by the amount of jitter (%) of experiment acquisition and the relation between the radial rake (θ r).In the scope with respect to zero radial tilt position+0.1 to-0.1 degree, amount of jitter has minimum value.When radial rake θ r became big, shake will become big with the step that increases significantly.In other words, to be made as hour shake also minimum as radial rake θ r.
Therefore, will rooting adjust optical disc apparatus in order under this labile factor, from recording channel, to read original signal according to the fluctuating (as focusing error and tracking error) aspect the change (as radial skew and tangential tilt) of physics and the electricity.
Illustrate that below with reference to Figure 46 a kind of traditional being used to compensates the optical disc apparatus of radial skew.Comprise a CD 8101, shaven head 8102, inclination sensor 8103, prime amplifier 8104, a radial skew controller 8105 and a radial skew adjuster 8106 in this conventional optical disc device.
In the operation of the conventional optical disc device of this structure, inclination sensor 8,103 one of output have corresponding to the tilt signals Sr of CD 8101 with respect to the voltage of the tilt quantity of shaven head 8102.Prime amplifier 8104 amplifies this tilt signals Sr.Radial skew controller 8105 drives radial skew adjusters 8106 and makes tilt signals vanishing after this amplification.Like this, shaven head 8102 just can remain on the position parallel with CD 8101, thereby just can carry out the access of high-quality signal to CD.
But in above-mentioned structure, inclination sensor (8103) is basic parts, and it can make production cost increase, and since it will to be placed on shaven head (8103) other, like this with regard to overslaugh the miniaturization of optical disc apparatus.In addition, inclination sensor should be parallel to shaven head exactly, otherwise the parallel relation between shaven head and the CD just can not correctly be regulated.
Disclosure of the Invention
One of purpose of the present invention is to provide a kind of optical disc apparatus that can address the above problem.
The present invention be directed to and solve above-mentioned shortcoming and make improvements, its basic purpose provides a kind of improved optical disc apparatus.
To achieve these goals, this provide a kind of by the recording channel that luminous point is focused on CD on and read the optical disc apparatus of signal from this recording channel, comprise in this device that is used to produce first pattern generator that causes first pattern of described read output signal shake, and a writing station that is used for described first pattern is write one first recording channel of described CD.
The accompanying drawing summary
In following most preferred embodiment in conjunction with the accompanying drawings, it is clear that above and other objects of the present invention and characteristics will become.In each accompanying drawing, similar part is marked with identical reference number, wherein:
Figure 1A is that schematic representation is according to a kind of vertical view that has the CD in a correction data district of the present invention;
Figure 1B is the vertical view of a kind of modification of the CD shown in schematic representation Figure 1A;
Fig. 1 C is that schematic representation is according to a kind of vertical view that has the CD in two correction data districts of the present invention;
Fig. 2 schematically shows the figure of the CD of a kind of wiping (can rewrite);
Fig. 3 is for enclosing the enlarged drawing in the part correction data district that comes with circle R among Figure 1A;
Fig. 4 is the view that schematically shows first example of the signal in the correction data district that is recorded among Figure 1A, 1B and the 1C.
Fig. 5 A is the synoptic diagram of the record indentation distribution situation of specific pattern signal in the presentation graphs 3;
Fig. 5 B is the synoptic diagram of the special case that indentation distributes among the presentation graphs 5A;
The specific pattern signal sector strucre in Fig. 6 presentation graphs 4;
Fig. 7 is the synoptic diagram that concerns between the figure of expression record indentation and the signal read from this record indentation;
Fig. 8 is the block scheme of the optical disc apparatus in the expression first embodiment of the invention;
Fig. 9 is for representing the amount of jitter measuring appliance shown in Figure 8 and the block scheme of phase-locked loop circuit unit (PLL);
Figure 10 is the synoptic diagram of the structure of expression radial skew adjuster shown in Figure 8;
Figure 11 has the process flow diagram of the main operating process of the optical disc apparatus among the Fig. 8 of the CD among Figure 1A for expression;
Figure 12 is the figure of aid illustration according to radial skew method of adjustment of the present invention;
Figure 13 is the process flow diagram of the radial tilt estimation flow process of the piece # 15 of the expression piece # 5 of Figure 11 and Figure 14 and #23;
Figure 14 has the process flow diagram of the main operating process of optical disc apparatus among Fig. 8 of CD of Fig. 1 C for expression;
Figure 15 is the view that presentation address and best radial skew are adjusted the relation between the position;
Figure 16 schematic representation is recorded in second example of the signal in the correction data district of Figure 1A, 1B and 1C;
Figure 17 is the figure of the sector strucre of 11T signal of expression Figure 16;
Figure 18 is recorded in the synoptic diagram of the 3rd example of the signal in the correction data district of Figure 1A, 1B and 1C for expression;
Figure 19 is the figure of a kind of modification in correction data district in the presentation graphs 3;
Figure 20 is recorded in the synoptic diagram of first example of the signal in correction data district among Figure 19 for expression;
Figure 21 is recorded in the synoptic diagram of second example of the signal in correction data district among Figure 19 for expression;
Figure 22 is recorded in the synoptic diagram of the 3rd example of the signal in correction data district among Figure 19 for expression;
Figure 23 is the synoptic diagram of the another kind of modification in correction data district in the presentation graphs 3;
Figure 24 is recorded in the synoptic diagram of first example of the signal in correction data district among Figure 23 for expression;
Figure 25 is the synoptic diagram of second example that expression is recorded in the signal in correction data district among Figure 23;
Figure 26 is the synoptic diagram of the 3rd example that expression is recorded in the signal in correction data district among Figure 23;
Figure 27 is the figure of the third modification in correction data district among Fig. 3;
Figure 28 is the synoptic diagram that expression is recorded in first example of the signal in correction data district among Figure 27;
Figure 29 is the synoptic diagram of second example that expression is recorded in the signal in correction data district among Figure 27;
Figure 30 is the synoptic diagram of the 3rd example that expression is recorded in the signal in correction data district among Figure 27;
Figure 31 is the block scheme of a kind of optical disc apparatus in the expression second embodiment of the invention;
Figure 32 is the synoptic diagram of the structure of tangential tilt adjuster among expression Figure 31;
Figure 33 aid illustration is according to the figure of tangential tilt method of adjustment of the present invention;
Figure 34 is the block scheme of a kind of optical disc apparatus in the expression third embodiment of the invention;
Figure 35 is the block scheme of a kind of optical disc apparatus in the expression fourth embodiment of the invention;
Figure 36 is the figure of first example in the correction data district of the used CD of optical disc apparatus among expression Figure 37;
Figure 37 is the block scheme of a kind of optical disc apparatus in the expression fifth embodiment of the invention;
Figure 38 is the process flow diagram of the radial skew adjustment operation of optical disc apparatus among expression Figure 37;
Figure 39 is for representing the figure according to the CD after a kind of change the of the present invention;
Figure 40 A and 40B are the figures of the example in the correction data district of CD among expression Figure 39;
Figure 41 is the block scheme of a kind of optical disc apparatus in the expression sixth embodiment of the invention;
Figure 42 is the process flow diagram of the radial skew adjustment operation of optical disc apparatus among expression Figure 41;
Figure 43 is the block scheme of a kind of optical disc apparatus in the expression eighth embodiment of the invention;
Figure 44 is the figure of the radial skew of aid illustration CD;
Figure 45 is the figure of the relation between aid illustration radial skew and the amount of jitter;
Figure 46 is the block scheme of expression conventional optical disc device.
Most preferred embodiment
An a kind of example that is used for the CD on the optical disc apparatus of the present invention of schematic representation in Figure 1A.CD 1 has a data recording areas 2 and correction data district 3 that is formed on the boot section.In this correction data district 3, writing down predetermined correction data.
Representation class is similar to a special case of the CD 1 of CD shown in Figure 1A in Figure 1B.In this example, have in addition on this CD 1 and be positioned at 3 one the pseudo-data field Dd in correction data district, and the control data zone Dc between correction data district 3 and recording areas 2.Dd, 3 and these zones of Dc all be formed in the boot section of CD 1.
Pseudo-data field Dd extends to the position that the optical readout device of certain optical disc apparatus can be visited to the center of CD 1.Writing down pseudo-data in pseudo-data field Dd, these puppet data only are used for making this optical readout device place correction data district 3 with interior zone by the optical readout device visit.
Writing down correction data in the correction data district 3, this zone best (but being not limited to) is greater than quadrant.In control data zone Dc, writing down various information, as the address in correction data district 3 about CD 1.
In Fig. 2, showed be formed among Figure 1A a kind of wipe or rewritable CD on and enclose the correction data district 3 that comes by circle R.Has a correction data road district 23 that is writing down correction data in the correction data district 3 at least.This correction data road district 23 preferably is made up of three recording channels.
A plurality of recorded informations that are used for are arranged on every road, and with independently a plurality of indentations of neighboring trace mutually.For the ease of identification, with dashed lines 24 expressions on the border of phase neighboring trace in Fig. 2.Recording channel is determined by platform shape part PL and intaglio trace part PG.
The line L1 of top represents the surface profile line of CD, and wherein information only is recorded among the intaglio trace part PG.Here, intaglio trace part PG is determined by boundary line 24.When information only is recorded in intaglio trace part PG (not showing in Fig. 2), platform shape part is determined by boundary line 24.
The line L2 of below also is the surface profile line of expression CD, and wherein information is recorded in platform shape part and the intaglio trace part.Here, adjacent forward position and back along between the zone corresponding to the recording areas of intaglio trace part PG or platform shape part PL.
The enlarged drawing of in Fig. 3, having showed correction data district 3.Data field 3 has three roads 32,33 and 34.In the present embodiment, first, second is arranged from interior on CD 1 in order outwardly with the 3rd road 32,33 and 34.Provide 20 and 21 two roads respectively in 23 both sides, correction data road district.Be useful on a plurality of indentations 22 of recorded information in every road.
Boundary line by dotted line 24 expressions can be determined by suitable indicating mode (as intaglio trace or figure) is actual.Hereinafter indentation and in a road spacing of adjacent two indentations be called " intaglio trace " and " indentation at interval ".In addition, the spacing corresponding to adjacent two roads of the spacing in adjacent two edges boundary line 24 is called " road is wide " in this manual.Note that all roads 32,33 and 34 have with form CD 1 recording areas 2 on the identical wide T in road of recording channel
1(as shown in Figure 3).
Note that " intaglio trace " in this manual is illustrated on the matrix of CD and has the privileged site of the reflective character that is different from other positions, and be used for digital-information recording.For example, in the compact disc system, by being carved into or the counterpart of the CD matrix of pruning forms the intaglio trace.In addition, in phase change disc,, the counterpart on the CD matrix forms indentation, other matrix that make the indentation position be different to be in crystalline texture by being carried out amorphous material.Also have in magneto-optical disk, the direction of the lattice plane by linking corresponding position forms indentation.Like this, obviously, any suitable structure or material have the characteristic different with the light reflective properties at other positions of matrix.
Showed that in Fig. 4 expression is recorded in first example of the signal in zone, correction data road 23 (3) among Fig. 3.Please note for brevity and indentation is not showed among the figure.Article one, road 32 is writing down random signal SR.Second road 33 is writing down specific pattern signal SP.Article three, road 34 is writing down random signal SR.
Random signal SR produces according to a kind of (2,10) limited distance of swimming code, comprising 3T signal S3T to 11T signal S11T.Please note that " T " representative is according to the bit length of the channel of ISO/IEC13963 here.
According to intaglio trace on the CD 1 and indentation this situation is described at interval below.This random signal is a plurality of intaglio traces and indentation set at interval.This intaglio trace is real predetermined number (such as 9), and the length difference of each intaglio trace corresponds respectively to the different length of 3T signal S3T to 11T signal S11T.This indentation also has predetermined number (such as 9) at interval, and each indentation length difference at interval corresponds respectively to the different length of signal S3T to signal S11T.Hereinafter with reference to Fig. 5 A declare record first concrete indentation pattern in second road 33.
A kind of device that is used for correction signal (as signal SR and SP) is recorded in correction data road district 23 will be described below.By utilizing this correction data pen recorder (Figure 43), seller or user can be before or after CD be sold to the user in this CD recording correction data.
The recording areas 2 that note that CD 1 is writing down one (2,10) limited Run-Length Coding signal (being called " 2-10 modulation " hereinafter).Also can be for the present invention with removing 2-10 any other modulator approach modulating.For example, according to the 3T signal S3T of 2-10 modulator approach corresponding to 2T signal S2T according to (1,7) limited Run-Length Coding (being called " 1-7 modulation " hereinafter).According to the 11T signal S11T of 2-10 modulation corresponding to 8T signal S8T according to the 1-7 modulation.According to other modulator approaches 3T signal S3T and 11T signal S11T corresponding minimal tour of difference and maximum run.
An example in Fig. 5 A, having showed the indentation pattern of specific pattern signal SP briefly.This specific pattern signal SP forms by the combination that repeats between the first and second indentation patterns 3207 and 3208.In other words, the first and second indentation patterns 3207 and 3208 alternately are recorded on the recording channel that is aligned, for example second recording channel 33 in correction data district 23.
Comprise in the second indentation pattern 3,208 one than snick at interval 3205 and two be distributed in this respectively than the snick big intaglio traces 3204 and 3206 of 3205 front and back at interval.This than snick at interval 3205 less than laser spots Ls, and can be corresponding to minimal tour. Big intaglio trace 3204 and 3206 is all greater than laser spots Ls, and can be corresponding to the distance of swimming of maximum.
The diameter that note that laser spots Ls is to determine like this, makes that the light intensity of this laser spots Ls is the 1/e of center intensity
2Doubly (wherein e represents the end of natural logarithm).Also can be added to address date and error correcting code (calling ECC hereinafter) in single sector among the specific pattern signal SP.
An example having showed specific pattern SP in single sector among Fig. 6.Wherein address date and error correcting code are added to the two ends of this specific pattern signal SP respectively.
The signal of having showed a reduction from the data track 33 of indentation pattern with Fig. 5 A among Fig. 7 briefly.Solid line Wc represents the signal of reduction from the indentation pattern 3207 of Fig. 5 A, and wherein little than laser spots Ls intaglio trace 3202 is clipped in than between two big indentations intervals 3201 and 3203 of laser spots Ls.Dotted line Ws represents the signal that reduces from the intaglio trace 3202L greater than laser spots Ls.But intaglio trace 3202L is with the shape of intaglio trace 3202 extends and form to indentation interval 3201 directions.
Horizontal center line S1 is a tangent line of cutting apart the amplitude of this recovering signal.Because the laser light reflected bundle changes according to the area of indentation from the recording channel 33, then from the amplitude variations amount of the recovering signal of intaglio trace 3202L greater than amplitude variations amount from the recovering signal of intaglio trace 3002.At this, the amplitude that reduces the signal Ws that speed reflected than intaglio trace 3202 of the amplitude of the signal Wc that intaglio trace 3202L is reflected to reduce speed fast.
As a result, recovering signal Ws intersects (as shown in Figure 7) than Zao amount of jitter Δ j of signal Wc and tangent line S1.Shake in the distance representative recovering signal of the presently claimed invention between the intersection point.In order to form these intaglio traces, can use any method that the intaglio trace partly is different from matrix part such as waved surface (from the matrix part raised or sunken), direction of magnetization and crystalline state (crystalline state or noncrystalline attitude) of making.
Except the pattern shown in Fig. 5 A, also can form specific pattern signal SP with relatively less than the intaglio trace of laser spots or indentation regenerative amplifier at interval and intaglio trace or indentation regenerative amplifier at interval greater than laser spots.This pattern is being that effectively this will have detailed description hereinafter aspect the optimization (as the adjusting of equalizer coefficients) of signal processing circuit.Please note road of 23 needs, correction data district, promptly writing down the specific pattern signal SP that is used in signal reduction generation shake.
The exemplary of indentation pattern of having showed the specific pattern signal SP of Fig. 5 A among Fig. 5 B.Wherein the first indentation pattern 3207 is to form like this, makes the big indentation interval 3201 of winning, less intaglio trace 3202 and the second big indentation 3203 length of extending 6T, 3T and 7T respectively along the longitudinal direction of recording channel at interval.In other words, separated by the interval of 6T and 7T respectively between big intaglio trace 3202 and the adjacent intaglio trace, shown in Fig. 5 B, the length of the first indentation pattern is 16T.
The second indentation pattern is to form like this, though the big intaglio trace 3204 of winning, than snick at interval 3205 the and second big intaglio trace 3206 respectively along longitudinal extension 6T, the 3T in road and the length of 7T.In other words, two big intaglio traces 3204 and 3206 are by length 3205 being separated at interval than snick by 3T.The length of the second indentation pattern 3208 is 16T.
In this example, form specific pattern signal SP and be recorded on the recording channel 33 by repeating the long indentation patterns 3207 of these two 16T by name and 3208.But, obviously to the explanation of Fig. 7 as can be seen, the specific pattern signal SP that forms as long as repeat one of these two indentation patterns 3207 and 3208 is enough shakes in the generation recovering signal just.If much less these two indentation patterns 3207 and 3208 are just combined certainly and can produce shake more effectively.First embodiment
In Fig. 8, showed a kind of optical disc apparatus according to the first embodiment of the present invention.Comprise among the optical disc apparatus P1 that one is used for laser beam is got to CD 1 with the recorded information and the optical readout device 122 of restore information thereon from it.For this purpose, comprise a laser diode 123 that is used to get laser beam in this optical readout device 122, be used to focus the laser beam on the recording channel of CD 1 and optical instrument, one that the laser beam that reflects from CD 1 focuses on a certain position are used to receive the laser beam that is reflected and beat the pin photodiode of the situation on recording channel to produce indication laser.
The transporter 58 that is provided is used for moving optical readout device 122 along the radial direction of CD 1, and scans the recording channel that is formed on the CD on the CD by laser beam is got to.Like this, optical readout device 122 and wheelwork 58 have just constituted optical read-out system Os.This transporter 58 places on the tilting gearing 60 that can radially tilt with respect to CD 1.
In Figure 10, showed this tilting gearing 60.A base plate Pr and a fulcrum part Fr who is used to support the wheelwork 58 on it is arranged in this tilting gearing 60.The end of base plate Pr couples together with cantilevered fashion and fulcrum part Fr bently, and its other end places on the end of vertical shuttle piece Tr.Be slidingly connected between the other end of this vertical shuttle piece Tr and the radial skew adjuster 67.In this example, this vertical shuttle piece Tr can be made by the screw rod that radial skew adjuster 67 is rotated by one, and can be along the up-and-down motion shown in the arrow DZ.
When making that by rotation shuttle piece Tr base plate tilts, all to measure by the amount of jitter of optical readout device 122 from the signals of zone, correction data road 23 reduction at every turn.Corresponding to the change at base plate Pr inclination angle, the optical axis Ax of readout device 122 has also changed with respect to the angle of CD 1 recording surface.As a result, come from crosstalking of the first and the 3rd adjacent recording channel 32 of second recording channel 33 and 34 variation has taken place, and variation has also taken place from the shake of the recovering signal in these correction data roads 33.Note that and make that the amount of jitter of recovering signal is that the position of minimum value is the optimum position of radial skew.
Be connected to optical readout device 122 with reference to 8, one prime amplifiers 125 of figure again, be used to increase the amplitude of the signal that comes from pin photodiode 124, and produce recovering signal.This recovering signal changes according to the length that is formed at the indentation on CD 1 recording channel.
A balanced device 126 is connected to prime amplifier 125 and is used to receive recovering signal, and reduces the wave interference of recovering signal.A binary circuit 127 is connected to balanced device 126 and is used for this recovering signal is converted to digitized recovering signal Sd.Note that this digitized recovering signal Sd can be subjected to above-mentioned crosstalking, amplitude deficiency, noise, waveform is interfered and the influence of shake.
A phase locked-loop unit (PLL) 129 is connected to binarization circuit 127, is used to receive the reduction of data signal Sd from this binarization circuit, and produces synchronizing signal S510.The production process of this synchronizing signal is described with reference to Fig. 9 hereinafter.
A sample circuit 1210 is connected to binarization circuit 127 and phase locked-loop unit 129, is respectively applied for to receive digitizing recovering signal Sd and synchronizing signal S510.Like this, this sample circuit 1210 is sampled to produce channel data S511 to this digitizing recovering signal Sd is progressive according to synchronizing signal S510.
A demoder 1211 is connected to sample circuit 1210, is used to receive channel data S511 wherein, and decodes with reduction original signal Srp by using error correction.Then this decoded signal Srp further is transferred to the next stage of operation.
An amount of jitter measuring appliance 41 is connected to binarization circuit 127 and phase locked-loop unit 129, is used for receiving respectively wherein signal Sd and S510.Amount of jitter measuring appliance 41 is measured the amount of jitter of the signal of 23 reduction from correction data road district according to these two signal Sd and S510, and produces dither signal Sj.
In Fig. 9, describe the composition of phase locked-loop unit 129 and amount of jitter measuring appliance 41 in detail.Comprise one first phase comparator interconnecting 131, low-pass filter 132,133, frequency divider of voltage-controlled oscillator (VCO) 134, a gate circuit 135 and D type trigger circuit 138 (as shown in Figure 9) in this phase locked-loop unit 129.Comprise interconnective one second phase comparator 53, Hi-pass filter 51, a wave detector 54 and an A/D converter 52 (as shown in Figure 9) in this amount of jitter measuring appliance 41.First phase comparator 131 is connected to binarization circuit 127, is used to receive digital recovering signal Sd wherein; And be connected to gate circuit 135, with the signal S141 that receives wherein.Second phase comparator 53 is connected to binarization circuit 127 and D flip-flop 138, is used for receiving respectively wherein signal Sd and S510.
In operation, first phase comparator 131 detect recovering signal Sd and from the phase differential between the signal S141 of gate circuit 135 to produce phase differential between these two signal Sd of expression and the S141 and the first phase signal S139 of difference on the frequency.132 of low-pass filters extract low-frequency component to produce a VCO control signal with voltage of control voltage-controlled oscillator (VCO) 133 from phase signal S139.VCO133 produces a clock signal S137 according to this VCO control signal.Frequency divider 134 is divided into predetermined frequency to this clock signal S137.Gate circuit 135 is according to the signal of input recovering signal Sd conducting wherein from frequency divider 134 outputs.
In other words, have only when recovering signal exists, just be transferred to phase comparator 131 and D type trigger circuit 138 as signal S139 by the signal S141 of frequency division.At this moment, the operation of VCO133 makes two input signal Sd and S141 (S139) homophase.The result has just obtained and synchronous synchronizing signal S510 of the basic cycle of digitized recovering signal Sd.
Phase differential between second phase comparator, 53 detection signal Sd and the S510, and produce the second phase signal S140 of the phase differential that detected of expression.
Hi-pass filter 51 extracts radio-frequency component and it is transferred to wave detector 54 from the second phase signal S140.
As shown in Figure 8, comprise first and second storeies 51 and 52 that are connected to amount of jitter measuring appliance 41 in the radial tilt estimator 50, be used to receive dither signal Sj to detect radial skew amount θ r.Radial tilt estimator 50 produces a radial skew adjustment control signal St1 who is used to control radial skew adjuster 67, so that adjust tilting gearing 60 with predetermined pitch angle.Estimator 50 is connected to radial skew adjuster 67 by a circuit Lr1 who is used for transmission signals St1.
A radial skew controller 54 that has the 3rd storer 55 is connected on the radial tilt estimator 50 by circuit Lr2 and Lr3.This controller 54 also is connected to radial skew adjuster 67 by circuit Lr4, and is connected to wheelwork 58 by circuit Lr5 and Lr6.
When the radial tilt correction operation start, radial skew controller 54 produces an enabled instruction and passes through circuit Lr2 to radially tilt estimator 50 transmission.When received signal Sc, radial tilt estimator 50 produces radial skew and adjusts control signal St1.Then, optical read-out system Os begins to scan the correction data district and with above-mentioned mode recovering signal Sj.Radial tilt estimator 50 is detecting current amount of jitter according to signal Sj and St1 under top rake.Like this, detected address and amount of jitter are stored in respectively in storer 51 and 52, and upgrade when tilting gearing 60 is according to current demand signal Sj and St1 change inclination angle at every turn.
According to institute's data updated, radial tilt estimator 50 determines to make the optimum angle of incidence of radial skew θ r minimum, and produces an optimum angle of incidence signal S θ a.This signal S θ a is transferred to radial skew controller 54 by circuit Lr3, and is stored in the storer 55.
Radial skew adjustment operation below with reference to the optical disc apparatus P1 that has the CD 1 among Figure 1A in Figure 11 key diagram 8.Each piece in the process flow diagram is represented a process step.
In piece # 1, when the operation beginning, controller 54 control transporters 58 move to the shaven head of optical readout device 122 boot section of CD 1.Optical readout device 122 is read the address that correction data road district 23 is obtained in the boot section earlier.Radial skew controller 54 is further according to this address date, and control transporter 58 is 23 belows, correction data road district of shaven head (optical readout device 122) mobile lan CD 1.Optical readout device 122 is read correction data from data track district 23.In this example, correction data road district 23 is positioned on a certain inner periphery, but is not limited in this circumference.Any suitable position can be used as correction data road district 23 on CD 1.Then, program enters next flow path block # 3.
In piece # 3, radial skew controller 54 produces start command signal Sc, and it is transferred to radial tilt estimator 50, to start the radial tilt estimation operation.Then, the operation of execution block # 5.
In piece # 5, radial tilt estimator 50 is carried out the radial tilt estimation operation to obtain best radial skew θ r.To be elaborated with reference to Figure 13 hereinafter for this flow path block operation.After this, the operation of execution block # 7.
In piece # 7, the optimum angle of incidence signal S θ a that radial skew controller 54 obtains in the 3rd storer 3 storage block #5.Then, this radial skew controller 54 further drives radial skew adjuster 67 according to optimum angle of incidence signal S θ the base plate Pr of tilting gearing 60 is arranged at the optimum position.After this, the shaven head of optical readout device 122 on the low plate of tilting gearing 60 with best radial skew amount θ r radially Dr move, to carry out accessing operation.
Mind you has the radial skew adjustment operation operation in piece # 1 of device P1 of the CD 1 among Figure 1B basically with above-mentioned with reference to Figure 11, and the operation described is identical.In piece # 1, optical readout device 122 is at first read the control data zone Dc of boot section to obtain the address in correction data road 23.Then, optical readout device 122 moves to null data area Dd according to the address date that is read, can travel all over correction data district 3 to guarantee this shaven head.
In Figure 12, show the relation between the radial skew of the base plate Pr of tilting gearing 60 and CD 1 briefly.When CD 1 does not have radial skew (shown in solid line), then base plate Pr is set to be parallel to the surface of CD 1, makes laser beam Lb vertically beat on CD 1 along axle.But when CD 1 had radial skew θ r shown in dotted line, this optical disc surface had the inclination of radial rake size with respect to optical axis Ax.In order to compensate this inclination angle [theta] r, the screw rod motor M S of radial skew adjuster 67 is drop-down the free end of base plate Pr, makes the predetermined angle of base plate inclination according to radial rake θ r.
In Figure 13, showed the operating process of radial tilt correction piece # 5 among Figure 11.
In step S100, from radial skew controller 54 reception start command signal Sc the time, radial tilt estimator 50 driving radial skew adjusters 67 make and are set in initial position.This initial position is that such position makes the base plate Pr of tilting gearing 60 become a right angle basically with the rotating shaft of cd-rom motor Md.In other words, preferably pedestal 60 is arranged on the middle position between top and the bottom position.This top and bottom position determine according to Figure 45, like this pedestal 60 can tilt in the radial rake scope of maximum (being preferably+0.5 ° to-0.5 °).Then, carry out next step S102.
In step S102, radial tilt estimator 50 is according to the shake of dither signal Sj detection corresponding to current tiltangle a.Then, the currency of expression tiltangle a and amount of jitter Sj is stored in respectively in the address " 0 " of second memory 52 and first memory 51.Hereinafter, for the ease of adding " address digit " suffix, for example θ a0 and Sj0 after the inclination angle of the address that is identified in each corresponding storer and the amount of jitter.Follow execution in step S104.
In step S104, radial tilt estimator 40 drives radial skew adjusters 67 and moves down (or clockwise) predetermined Δ t angle, makes the pedestal 60 θ a angle that has a down dip.Δ t determines according to its resolution, is preferably 0.1 degree according to Δ t shown in Figure 45.This is that the outer of this CD is remaining hangs down because CD 1 is placed in cd-rom motor Mb when going up (as top according to described in the explanation of Figure 44).Therefore, by being moved down, pedestal 60 can improve radial skew θ r.Hereinafter, downward direction is passed through prefixing "-" expression before amount of movement, as-Δ t; And for upward to (or counterclockwise) with prefix "+" expression, as+Δ t.Then, execution in step S106.
In step S106, when pedestal when rotating resolution angle-Δ t (Figure 44) clockwise, the current amount of jitter that radial tilt estimator 50 detects corresponding to current radial skew.Then, detected current amount of jitter Sj1 and cant angle theta a1 are stored in respectively in the address " 1 " of first memory 51 and second memory 52.Note that when pedestal 60 is moved up or down resolution angle Δ t and all will detect amount of jitter Sj.Therefore, the time interval of hereinafter pedestal 60 being moved Δ t is defined as a radial tilt estimation cycle.Then, carry out next step S108.
In step S108, judge whether the amount of jitter Sj1 of current cycle estimator is equal to or less than the amount of jitter Sj0 of previous cycle estimator.When radial skew has improved, then amount of jitter Sj diminishes, and is judged as "Yes".Then, carry out next step S110.
In step S110, in last cycle estimator, be stored in the amount of jitter Sj0 in storer 1 and 2 respectively.Replaced by current amount of jitter Sj1 and current inclination angle [theta] a1 respectively with tiltangle a0.Then, turn back to step S104.The operation that note that step S110, S104, S106 and S108 repeat up to step S108 be judged as "No" the time till.So just can make the optimum position of amount of jitter Sj minimum (this means radial skew also minimum) along finding clockwise.
But, when in step S108, being judged as "No", this means that a pedestal 60 downward-sloping back radial skews become poorer than the last cycle.Therefore, this operation that pedestal 60 is tilted is abandoned, and then, enters next step S112.
In step S112, radial tilt estimator 50 drives the radial skew adjusters 67 minimum resolution amount+Δ t that moves up, so that detect the optimum position on this direction.Then enter next step S114.
In step S114, current amount of jitter Sj1 and cant angle theta a1 are stored in respectively in the address " 1 " of first memory 51 and second memory 52 in the mode that is similar to step S106.Then enter next step S116.
At step S116, judge whether the amount of jitter Sj1 of current cycle estimator is equal to or less than the amount of jitter Sj0 of last cycle estimator.When being judged as "Yes", this means that radial skew is improved, and enter step S118.
In step S118, the amount of jitter Sj0 and the inclination angle [theta] a0 that are stored in respectively in storer 51 and the storer 52 are replaced in the mode that is similar to step S110 by current amount of jitter Sj1 and inclination angle [theta] a1 respectively.Then program turns back to step S112.Please note operation among step S118, S112, S114 and the S116 repeat up in step S116 be judged as "No" the time till, this process is identical with step S108.So just can make the optimum position of radial skew minimum along counterclockwise search.
When step S116 be judged as "No" the time, this means that the pitch angle in last cycle estimator is to make the optimum position of radial skew minimum as the result along the search of clockwise and inverse clock both direction.Then enter step S120.
In step S120, the current tiltangle a0 that is stored in the storer 2 is transferred in the radial skew controller 54 as optimum tilt angle signal S θ a.Terminator then.
Another example of in Fig. 1 C, having showed the CD among Figure 1A.In this example, the correction data district 3 on the CD 1 in having Figure 1A, also has a correction data recording areas 4.Although these two zones 3 and 4 are formed at respectively on the inner periphery and excircle of CD in Fig. 1 C, and are as indicated above, these two zones 3 and 4 also can be formed at other positions on the CD 1.
Showed that in Figure 14 the radial skew of optical disc apparatus among a Fig. 8 who has a CD 1 among Fig. 1 C adjusts operating process.Except about the operation to second record area 4, other operations among Figure 14 are basic identical with the operation among Figure 11.
For example, piece # 11, #13 and #15 correspond respectively to piece #1, #3 and #5.
But in piece # 17, radial skew controller 54 is stored in the optimum tilt angle signal S θ a that obtains as the first optimum tilt angle signal S1 in the storer 55 in piece # 5.
In piece # 27, radial skew controller 54 is released and is enclosed district (3) and cylindrical at interior circle and enclose optimum incline angle between the district (4).Then, controller 54 control radial skew adjusters 67 are set to the pitch angle that each inserts in position in the radial direction according to optical readout device 122 like this to optical readout device Os (122 and 58).
Showed briefly that in Figure 15 piece # 27 inserts the principle at pitch angle.In general, enclose (L3) at interior circle and go up optimum angle of incidence S θ (to for radial skew) minimum value (S1) is arranged, this optimum angle of incidence outwards increases gradually and reach maximal value (S2) on excircle (L4).Based on this fact, the optimum angle of incidence (Sx) on any position (X) between the inner periphery of CD 1 can be determined by the digital interpolative method.
In Figure 15, the Z-axis representative is used for minimum optimum angle of incidence (θ) at radial skew, and transverse axis is represented the address of optical readout device (shaven head) corresponding to direction of scanning Dr.Detect first optimum angle of incidence S1 and S2 according to first and second correction datas 3 and 4 respectively now, and they are marked on address 3 and the address 4 with round dot.Can couple together with a curve 7301 between these two round dots, this curve can be defined as the function between position and the inclination angle.The actual radial skew that can simulate the recording areas 2 between first and second data fields 3 and 4 by the function coefficients of determining this curve.The function coefficients of this artificial line 7301 can be determined with theoretical and experimental technique.
Further, can be recorded in zone suitable on the CD 1 to 7301 the function coefficients of determining like this of being modeled to.Even optical disc apparatus of the present invention also can be rapidly when changing CD dynamic calibration radial skew easily.
In addition, by according to the radial skew that is formed at the correction data road district calculating CD 1 on the CD 1, reduced crosstalking during the tracer signal of the recording channel of aiming at reading like this from the recording channel adjacent with the aligning recording channel.Therefore, further improved the reliability of read operation.
In addition, because optimum angle of incidence θ a is used as optimum angle of incidence signal S θ a and is stored in the 3rd storer 55 of radial skew controller 54, like this, might compare the radial skew amount of this optical disc apparatus and optical disc apparatus in the past, for example this device carried out Function detection to this optical disc apparatus before the terminal user provides.
The radial tilt correction of the present invention critical path of can in officely what is the need for carries out in the time of slant correction.For example, when CD was subjected to strong vibration, CD can change its position with respect to optical readout device or shaven head.
When balanced device 126 reduces to the degree that can not detect to the shake of recovering signal, can from the optical disc apparatus of Fig. 8, remove this balanced device 126.Like this, the signal of prime amplifier 125 outputs is directly inputted to binarization circuit 127.
For amount of jitter measuring appliance 11, can adopt any other can detect the device of the amount of jitter of recovering signal Sd.When there is scale error in CD in the scope of permission, also may show as different numerical value at the inner periphery of CD and the radial skew of excircle.This error may be because reflecting surface out-of-flatness, distortion or forming process is improper causes.In this case, preferably pass through to adjust the whole recording areas compensation radial skew of the inclination angle of optical readout device Os (122 and 58) to CD.For this purpose, inner periphery and excircle according to the present invention at CD provide two correction data districts respectively, and be described to the explanation of Fig. 1 C in as mentioned.
Second example in Figure 16, having showed the correction data road district of Fig. 4.In this example, all writing down 11T signal S11T in first and second roads.Writing down random signal SR in second road 33.
Modulation produces this random signal SR according to 2-10, comprising 3T signal S3T to 11T signal S11T.Below with reference to intaglio trace on the CD 1 and indentation this situation is described at interval.This random signal SR is a plurality of intaglio traces and indentation combination at interval.This intaglio trace has predetermined number (for example nine), and its length has nothing in common with each other, and corresponds respectively to the length of 3T signal S3T to 11T signal S11T.Indentation also has predetermined number (for example nine) at interval, and its length has nothing in common with each other and corresponds respectively to the length of signal S3T to signal S11T.
Only writing down 11T signal S11T in the first and the 3rd road 32 and 34, this signal be one by length corresponding to intaglio trace of 11T signal S11T and length a continuous pattern that indentation is formed at interval corresponding to 11T signal S11T.As long as comprised abundant 11T signal composition, also can in the single sector of 11T signal, be added to address and ECC in the 11T signal.
An example in Figure 17, having showed the 11T signal S11T in single sector.Wherein address date and error correcting code are added to the two ends of 11T signal S11T respectively.
In Figure 18, showed the 3rd example that is similar to the correction data road district 23 of Figure 15.In this example, writing down specific pattern signal SP in second road 33.The formation of the pattern signal SP that this is specific is described with reference to the explanation of Fig. 5 A and 5B in as mentioned.
In Figure 19, showed the correction data road district 23 shown in another kind of Fig. 3.Although in the data in Fig. 3, it is wide down that all roads 32,33 and 34 have identical road, and the wide T2 in the road in second road 33 is less than the wide T1 in road of other roads 32 and 34 in this example.
First example of in Figure 20, having showed the correction data road district 23 of Figure 19.The first and the 3rd road 32 and 34 is writing down random signal SR.Second road 33 is writing down specific pattern signal SP.
In this example, because the wide road width than other roads 32 and 34 in road in second road 33 is then big than the situation among Fig. 4 from crosstalking of adjacent road 32 and 34 for second road 33.Therefore, because the caused amount of jitter of radial skew is also bigger, so just further improved the precision that detects radial skew.In addition, because correction data road district 23 has occupied less space, then there is more space to be used for recorded information.
Second example of in Figure 21, having showed the correction data road district 23 that is similar to shown in Figure 19, in this example, the first and the 3rd road 32 and 34 is writing down 11T signal S11T, and second road 33 is writing down random signal SR.
The 3rd example of in Figure 22, having showed the correction data district that is similar to shown in Figure 18.In this example, the first and the 3rd road 32 and 34 is writing down 11T signal S11T, and second road 33 is writing down specific pattern signal SP.
In Figure 23, showed the correction data road district 23 that is similar among the another kind of Fig. 3 shown in Figure 19.In Figure 19, although wide road less than other roads, the road in second road 33 is wide, the first and the 3rd road 32 and 34 has the wide T3 in identical road in this example, and less than the wide T1 in the road in second road 33.
First example of in Figure 24, having showed the data track district 23 that is similar among the Figure 17 shown in Figure 20.Writing down random signal SR in the first and the 3rd road 32 and 34, second road 33 is writing down specific pattern signal SP.
In this example, because the road width in wide ratio second road 33, road of the first and the 3rd road 32 and 34 is then for second road 33, bigger than the situation among Fig. 4 from crosstalking of phase neighboring trace 32 and 34.Therefore, the amount of jitter that causes owing to radial skew is also bigger, thereby has further improved the degree of accuracy that radial skew detects.In addition, because correction data district 23 has occupied less space, then can there be more space to be used for recorded information.
Second example of in Figure 25, having showed the data track district 23 that is similar among Figure 17 shown in Figure 21.The first and the 3rd road 32 and 34 is writing down 11T signal S11T, and second road 33 is writing down random signal SP.
The 3rd example of in Figure 26, having showed the data track district 23 that is similar among Figure 23 shown in Figure 22, the first and the 3rd road 32 and 34 is writing down 11T signal S11T, and second road 33 is writing down specific pattern signal SP.
In Figure 27, showed the correction data road district 23 that is similar among another kind of Fig. 3 shown in Figure 3.Wherein all roads 32,33 and 34 the wide T4 in road are less than the wide T1 in road in the recording areas 2 of CD 1.
First example of in Figure 28, having showed the data track district 23 that is similar among Figure 27 shown in Figure 20.The first and the 3rd road 32 and 34 is writing down random signal SR, and second road 33 is writing down specific pattern signal SP.
In this example, all correction data roads 32,33 and 34 the wide T4 in road are wide less than the road of the recording channel in the recording areas 2 that is formed at CD 1.Therefore, for second road 33, it is bigger than the situation among Fig. 4 to come from crosstalking of phase neighboring trace 32 and 34.Therefore, because the amount of jitter that radial skew caused is also bigger, so just improved the degree of accuracy that detects radial skew.In addition, because correction data road district 23 has occupied less space, thereby there is more space to be used for recorded information.
Second example of in Figure 29, having showed the data track district 23 that is similar among Figure 27 shown in Figure 21.The first and the 3rd road 32 and 34 is writing down 11T signal S11T, and second road 33 is writing down random signal SR.
The 3rd example of in Figure 30, having showed the data track district 23 that is similar among Figure 27 shown in Figure 22.The first and the 3rd road 32 and 34 is writing down 11T signal S11T, and second road 33 is writing down specific pattern signal SP.Second embodiment
In Figure 31, showed a kind of optical disc apparatus according to second embodiment of the invention.Structure and the structure shown in Fig. 8 of this optical disc apparatus P2 are quite similar, and radial tilt estimator 50 wherein, radial skew controller 54 and radial skew adjuster 67 are replaced by tangential tilt estimator 70, tangential tilt controller 74 and tangential tilt adjuster 82 respectively.
As shown in figure 31, the structure with radial tilt estimator 50 and warp-wise inclination control 54 is identical respectively basically for the structure of tangential tilt estimator 70 and tangential tilt controller 74.The structure of tangential tilt adjuster 73 is similar to the structure of the radial skew adjuster 60 among Figure 10 except tilting gearing 73.
In Figure 32, showed tilting gearing 73.This tilting gearing 73 has the base plate Pt and the supporting point part Fr that are used to support the transporter 58 that is positioned at above it.The end of base plate Pt couples together with cantilevered fashion and fulcrum part Fr bendable with analysing.The other end places on the end of vertical reciprocating part Tt.Be slidingly connected between this vertical reciprocating part Tt and the radial skew adjuster 82.In this example, the vertical parts Tr that lives again is by can being constituted by the screw rod that radial skew adjuster 82 is rotated, and can be reciprocally along the up-and-down motion shown in the arrow Dz.
Along with the to-and-fro movement of screw part Tt, comprise that the base plate Pt of transporter 58 and optical readout device 122 pivots along direction of arrow Dr with respect to supporting point part Ft.In other words, the radial skew of optical read-out system Os can be determined by tangential tilt adjuster 82.Please note that the base plate Pr of radial skew and tangential tilt device 60 and 73 and Pt can be formed in the device of a Ft with two fulcrum Fr.
According to present embodiment, make the position of amount of jitter minimum corresponding to making the optimum angle of incidence of tangential tilt minimum.Based on this fact, tangential tilt can be compensated by the inclination angle adjustment to optical readout device Os.Since present embodiment basically to reference Figure 11,13 similar with the explanation of CD 1 among 14 couples of Figure 1A, 1B and the 1C, thereby omit further instruction at this for simplicity.
In Figure 33, showed the relation between the tangential tilt of the base plate of tilting gearing 73 and CD 1 briefly.When CD 1 did not have tangential tilt, the surface that base plate Pt is set to be parallel to CD 1 made laser beam Lb vertically beat on CD 1 along optical axis.But when CD 1 during along any one direction of arrow tangential tilt θ t, optical disc surface is with respect to this tangential tilt of inclined light shaft.In order to compensate this tangential tilt θ t, the screw rod motor M t of tangential tilt adjuster 73 accurately adjusts the free end of base plate Pt along the direction of correspondence according to this tangential tilt θ t.The 3rd embodiment
In Figure 34, showed optical disc apparatus according to third embodiment of the invention.The device of similar in Fig. 8 of this optical disc apparatus P3, radial tilt estimator 50 wherein, the radial skew adjuster 67 that radially inclines controller 54 and comprise tilting gearing 60 are focused position estimator 90, focus controller 94, focus servo circuit 100 respectively and replace by the focal position adjuster 110 that circuit Lr7 is connected to focus servo circuit 100.Please note the recliner 67 that comprises tilting gearing 60 and comprise that the tangential adjuster 82 of tilting gearing 73 can be used for present embodiment simultaneously, but for simplicity in this omission.
As shown in figure 34, the structure of focal position estimator 90 and focus controller 94 is basic identical with the structure of radial tilt estimator 50 and radial skew controller 54 respectively.Focal position estimator 90 produces a focus servo circuit control signal Sfs replacement radial skew adjustment control signal St1 (this signal is produced by radial tilt estimator 50) who is used to control focus servo circuit 100.
According to present embodiment, make the position of amount of jitter minimum corresponding to making the best focus position of focus error signal minimum.About this fact, focus servo circuit 100 produces the focus-compensating signal Sf that an expression current location is optimum position (error signal should be zero or is minimum value on this position).This focus-compensating signal Sf is by circuit Lr7 transmission focal position adjuster 110, and focal position adjuster 97 is adjusted optical readout device and is zero or minimum value with compensation at the detected focus error signal of current location like this.Just can be compensated by the focusing error that circuit characteristic determined like this.
As indicated above, because focal position can be compensated by the pitch angle of adjusting optical readout device Os, then the operating process of present embodiment is similar with reference Figure 11,13 and 14 explanation basically.The 4th embodiment
In Figure 35, showed a kind of optical disc apparatus according to fourth embodiment of the invention.Quite similar among the structure of this optical disc apparatus P4 and Figure 34, tracked position estimator 120, tracking control unit 124, tracking servo circuit 120 and tracing positional adjuster 140 replace respectively for focal position estimator 90 wherein, focus controller 94, focus servo circuit 100 and focal position adjuster 110.
The structure of tracing positional estimator 120, tracking control unit 124, tracking servo circuit 130 and tracing positional adjuster 140 is quite similar with the structure of focal position estimator 90, focus controller 94, focus servo circuit 100 and focal position adjuster 110 respectively.Just tracing positional estimator 120 produces a tracking servo circuit control signal Sts who is used to control tracking servo circuit 130, rather than radial skew is adjusted control signal St1.
According to present embodiment, make the position of amount of jitter minimum corresponding to best tracing positional, tracking error signal should be zero or be minimum value on this position.Based on this fact, tracking servo circuit 130 produces the tracking compensating signal Str of an expression current location for the optimum position of tracking.This tracking compensating signal is transferred to tracing positional adjuster 140 by circuit Lr7, and tracing positional adjuster 140 is adjusted optical readout device Os (122 and 58) to compensate at the detected tracking error signal of current location like this, makes its vanishing or is minimum value.Thereby, just can be compensated by the tracking error that circuit characteristic determined.
As indicated above, owing to can come tracing positional is compensated, so the operating process of present embodiment is basically with above identical with reference to Figure 11,13 and 14 explanation by the inclination angle of adjusting optical readout device Os.The 5th embodiment
In Figure 36, showed the another kind distortion in the correction data road district 23 among Fig. 3.Note that first, second and the 3rd correction data road 32,33 and 34 in Fig. 3 corresponds respectively to the road 3702,3701 and 3703 among Figure 36.In addition, track pitch Tp (replaces the wide T in road among Fig. 3
1) be defined as the distance between the two-phase neighboring trace center line.The center line in every road is represented by dot-and-dash line.And in the present embodiment, first, second and the 3rd road 3702,3701 and 3703 are arranged laterally from the inboard of CD 1 according to priority.
In this example, do not writing down any intaglio trace in second road 3701.Second road 3702 is writing down by the represented period 1 signal of the 3rd indentation pattern 3704.By repeatedly forming a pair of intaglio trace and indentation in the cycle at interval and on the 3rd indentation pattern 3704 recording channels 3702, wherein " TW " is window width at 22TW.The 3rd road 3703 is writing down signal second round by 3705 expressions of the 4th indentation pattern.By repeatedly in the cycle of 20TW, forming a pair of intaglio trace and indentation at interval, and the 4th indentation pattern 3705 is recorded on 3703.
In other words, the first correction data road 3702 is writing down the indentation pattern of being made up of at interval a pair of intaglio trace and indentation that repeats with the t1=1/22TW cycle.The 3rd correction data road 3703 is writing down the indentation pattern of being made up of at interval a pair of intaglio trace and indentation that repeats with the t2=1/22TW cycle.Note that t2 ≠ t1, t2 ≠ n.t1 and t2 ≠ t1/m, wherein " n " and " m " is positive integer.
For forming these intaglio traces, can use any intaglio trace that makes partly to be different from the method for matrix part, as waved surface (from stromal surface raised or sunken), direction of magnetization and crystalline state (crystalline state or noncrystalline attitude).Also can repeatedly be added to track address information in these signals, will this situation that repeatedly adds track address information of present embodiment be illustrated hereinafter.Note that shown in Figure 1A, 1B and 1C, use CD in the present embodiment respectively with one and two correction data roads district 23.
In Figure 37, showed a kind of optical disc apparatus according to fifth embodiment of the invention.Comprise in this optical disc apparatus 15 that one is used for laser beam is got on the CD 3800 with the optical readout device 3801 from top access information.In this optical disc apparatus, provide a radial skew adjusting gear 3809 corresponding to the radial skew adjuster 67 of Fig. 8 and tilting gearing 60 to adjust the obliquity of optical readout device 3801.
A radial skew controller 3811 is connected to radial skew device 3809, is used for adjusting control signal St1 to its transmission radial skew.
A radial tilt correction device 3808 is connected to radial skew controller 3811, is used to receive its enabled instruction Sc; Be also connected to radial skew adjusting gear 3809 in addition, be used for to its transmission radial skew compensating signal St2.
A first detector 3805 is connected to this bandpass filter 3803, is used to receive recovering signal by this first bandpass filter 3803 it is changed into first voltage.
An amplifier 3812 is connected to first detector, is used for receiving and amplifying this first voltage.This amplifier 3812 can be replaced by an attenuator.When the intaglio trace of the different length in the third and fourth indentation pattern 3704 and 3705 might make respectively from road 3702 and 3703 signal of reduction amplitude not simultaneously, can use amplifier (attenuator) 3812 to compensate the difference of this amplitude.
A second detector is connected to second bandpass filter 3804, is used to receive the recovering signal by second bandpass filter 3804, it is changed into second voltage.
A comparer 3807 that has two input ends that are connected to amplifier 3812 and second detector 3806 is used for receiving respectively first voltage and second voltage of amplification.This comparer 3807 detects the difference of these two voltages and produces a difference signal Sy.Note that poor from two crosstalk components in the first and the 3rd road 3703 of this difference signal Sy representative.
Therefore, when difference signal be on the occasion of the time, want big from crosstalking recently of first road 3702 from crosstalking of the 3rd road 3703.In this case, this means radial skew towards certain direction deflection, optical readout device 3801 parts and the CD 3800 that are positioned at inner periphery one side on this direction are close.This direction is called " reverse caster direction " hereinafter.
On the other hand, when difference signal Sy is negative value, recently little from crosstalking of the 3rd road 3703 from crosstalking of first road 3702.In this case, this means radial skew towards a certain direction deflection, optical readout device 3801 parts and the CD 3800 that are positioned at excircle one side on this direction are close.This direction is called " anacline direction " hereinafter.
In addition, when difference signal Sy is zero, this means for second road 3701 from adjacent road 3702 with 3703 crosstalk identical.Note that this position is to make the optimum position of radial skew minimum.
For practical purpose, when difference signal Sy is in the scope of permission, judge that then current location is best radial tilt position.
Because the gain of crosstalk components is determined by the frequency that is formed at the indentation pattern on this road.Therefore, have different gains from road 3702 with 3703 crosstalk components, this is because comparer 3807 more improper caused.In order to compensate the gain difference between this two crosstalk components, before comparer 3807, provide amplifier 3812 (as indicated above).The amplification coefficient of this amplifier 3812 can be determined according to the frequency of indentation pattern.
Radial tilt correction device 3808 is connected to comparer 3807, is used to receive the difference signal Sy from this comparer, to produce radial skew compensating signal St2 according to this signal Sy.
An address reader 3810 is connected to prime amplifier 3802, is used to receive its recovering signal, to produce an address signal of representing the address of current estimation radial skew; And be connected to radial skew controller 3811, be used for transmitting this address signal to it.
In Figure 38, showed the operating process of the optical disc apparatus execution radial tilt correction of Figure 37.This operating process that has the optical disc apparatus of the CD with two correction data districts 3800 shown in Fig. 1 C will be described hereinafter.And the operating process of optical disc apparatus that has the CD that has only a correction data district is very simple, and very is similar to the process among Figure 11, is omitted for the sake of simplicity at this.
At first, when being positioned in the optical disc apparatus of Figure 31 for the CD among Figure 37 3800, this radial tilt correction flow startup is as follows.
In step S200, optical readout device 3801 reads the second correction data road 3701 in the first correction data road district 23 that is formed on CD 3800 inner peripherys, with from wherein reading signal.Follow execution in step S202.
In step S202, judge that difference signal Sy is whether in the scope of-ε～ε.Wherein " ε " is a predetermined value of determining the tolerance band of best radial tilt position, and its size is preferably 2Db.If be judged as "No", this means execution in step S204.
In step S204, judge whether difference signal Sy is positive number.If be judged as "Yes", the current radial skew of this expression is partial to negative direction, then, and execution in step S206.
In step S206, optical readout device 3801 inclinations one predetermined amount delta t, then execution in step S202.
Yet when being judged as "No" in step S204, this expression radial skew is offset to positive dirction at present, so execution in step S208.
In step S208,, then return step S202 optical readout device 3801 inclination one scheduled volume-Δ t.Circulation execution in step S202, S204, S206 and S208 when judging that at step S202 current radial skew has been in the tolerance band till.
Step S202 be judged as "Yes" the time, execution in step S210.
In step S210, top rake is worked as in storage and store as the first dip angle signal S θ 1 and the first address signal Sa1 address.Then, execution in step S212.
In step S212, optical readout device 3801 reads the second correction data road 3701 in the second correction data road district 23 that is formed on CD 3800 excircles, with from wherein reading signal.Follow execution in step S214.
In step S214, judge whether difference signal Sy is in-scope of ε～ε in.If be judged as "No", execution in step S216 then.
In step S216, judge difference signal Sy whether be on the occasion of.If be judged as "Yes", then execution in step S218 optical readout device 3801 inclination one scheduled volume-Δ t, then returns step S214 in this step.
Yet, when when step S216 is judged as "No", enter step S220, wherein optical readout device 3801 tilts by one scheduled volume-Δ t, gets back to step S214 then.
As the "Yes" that is judged as at step S214, then execution in step S222 is stored as the second dip angle signal S θ 2 and the second address signal Sa2 working as top rake and address in this step.Terminator then.The 6th embodiment
The another kind of CD of in Figure 39, having showed the CD that is similar among Fig. 1 C.Similarly, in CD 1501, comprise a data recording areas 1502, the first correction data district C3 and second a correction data district C4 who is formed in its boot section.Please note that these zones 1502, C3 and C4 correspond respectively to the zone 2,3 and 4 among Fig. 1 C.Although with reference to Figure 39 this CD 1501 with two correction data districts is described at this, the present invention also can be applied to have only the CD in a correction data district.
Each first and second correction data district C3 and C4 are split into a plurality of sectors.For example, the first correction data district C3 can be divided into four sectors 1507,1508,1509 and 1510 by proper proportion.In other words, this correction data district C3 can five equilibrium or is not divided into two or more sectors five equilibrium.For the ease of identification, be defined as the first, second, third and the 4th inner calibration sector respectively in this sector of cutting apart 1507,1508,1509 and 1510.
Each inner calibration sector is further divided into two parts, and first is the data field that is used for recording correction data, and second portion is the address area that is used to write down the address information as sevtor address and track address.Specifically, comprise one first home address district 1507a and one first internal data field 1507b in this inside calibration sector 1507.Comprise one second home address district 1508a and one second internal data field 1508b, the 3rd home address district 1509a and the 3rd internal data field 1509b and one the 4th internal data field 1510a and one the 4th internal data field 1510b in other inner calibration sectors 1508,1509 and 1510 respectively.
Similarly, the second correction data district C4 also comprises first, second, third and portion's calibration sector 1503,1504,1505 and 1506 all round.In addition, comprise one first external address district 1503a and external data field 1503b, second external address district 1504a and one second external data field 1504b, the 3rd an external address district 1505a and one the 3rd data field 1505b in these external calibration sectors 1503,1504,1505 and 1506, and one portion address area 1506a and one portion data field 1506b all round all round.
As if each dividing sector of the first correction data district C3 aligning with the corresponding dividing sector of the second correction data district C4 in the radial direction.But as indicated above, each correction data district C3 and C4 can be divided into the part of different numbers with any suitable ratio.Therefore, these sectors and not requiring on the precalculated position that is distributed in respect to other sectors.
The correction signal in each internal data field 1507b, 1508b, 1509b and 1510b and external data field 1503b, 1504b, 1505b and 1506b with reference to Figure 40 A and 40B declare record below.Two different signal recording are in different sectors.
An example in Figure 40 A, having showed the first and the 3rd internal data sector 1507b and 1509b (1503b and 1505b).Road 5102,5101 and 5103 is corresponding to the 3rd data track 32,33 and 34 among Fig. 4.First road 5102 is writing down the period 1 signal that has corresponding to an indentation pattern 5104 of the 3rd indentation pattern 3704 of Figure 36.The second and the 3rd road 5101 and 5103 is not recorded shown in Figure 40 A.
An example in Figure 40 B, having showed the second and the 4th internal data sector 1508b and 1510b (1504b and 1506b).Road 5106,5105 and 5107 is corresponding to first, second and the 3rd data track 32,33 and 34 among Fig. 4.There is not record in first and second data tracks 5106 and 5105.But the 3rd road 5107 is writing down the period 1 signal that has corresponding to an indentation pattern 5108 of the 3rd indentation pattern 3704 among Figure 36.
In Figure 41, showed a kind of optical disc apparatus according to sixth embodiment of the invention.Comprise among this optical disc apparatus P6 that one is used for laser beam is got on the CD 1501 with the optical readout device 5201 of access information thereon.A radial skew adjusting gear 5211 that is used to adjust the obliquity of optical readout device 5201 is provided in optical disc apparatus, and it is corresponding to radial skew adjuster 67 among Fig. 8 and tilting gearing 60.
A radial skew controller 5212 is connected to radial skew adjusting gear 5211, is used for to its transmission radial skew control signal St1.
A radial tilt estimator 5210 is connected to radial skew controller 5212, is used to receive its start command signal Sc; And be connected to radial skew adjusting gear 5211, use to its transmission radial skew compensating signal St2.
A prime amplifier 5202 is connected to optical readout device 5201, is used to increase the amplitude from the signal of CD 1501 reduction, and produces recovering signal.This recovering signal changes along with the difference that is formed at the slot length of recording channel on the CD 1501.
The bandpass filter 5204 that frequency filtering is f1 is connected to prime amplifier 5202, is used to receive recovering signal wherein.When the turn-on frequency of bandpass filter 5202 is set to f1=1/22TW, then pass through with principal ingredient from the recovering signal of second road 5101 (Figure 40 A) or 5105 (Figure 40 B) from the crosstalk components in the 3rd road 5107 (Figure 40 B) of first road 5102 (Figure 40 A) of the first and the 3rd data sector 1507b and 1509b or the second and the 4th data sector 1508b and 1510b.
A wave detector 5205 is connected to bandpass filter 5204, is used for the recovering signal by bandpass filter 3803 is changed into voltage.
An address reader 5203 is connected to prime amplifier 5202, is used to read address information from the recovering signal that amplifies to produce switching signal SW.
This radial skew controller 5212 is also connected to this address reader 5203, is used to receive this switching signal Sw.
A selector switch 5206 that has an input port and two output ports is provided in this optical disc apparatus, and this selector switch is operated selectively one of them output port and this input port are coupled together by control signal.This input port is connected to wave detector 5205, is used to receive changing voltage wherein.One of them output port is connected to one first sampling holder 5207, and another is connected to one second sampling holder 5208.
One has the comparer 5209 that two input ends are connected to first sampling holder 5207 and second sampling holder 5208, is used to receive the crosstalk components from phase neighboring trace 5101 and 5107 that is kept.Comparer 5209 detects the difference of this two voltage and produces difference signal Sy.Note that the difference of this difference signal Sy representative from two crosstalk components of the first or the 3rd and second or the 4th sector.
This radial tilt estimator 5210 is also connected to comparer 5209, is used to receive this difference signal Sy.
The operating process of in Figure 42, having showed above-mentioned optical disc apparatus P6.Below just introduce this operating process briefly.
At first, second road of CD readout device 5301 visits first sector 1507 is for example from wherein reading information.Then, the recovering signal that prime amplifier 5202 amplifies from optical readout device 5301, and the recovering signal after the amplification is transferred to address reader 5203 and bandpass filter 5204.
Address reader 5203 reads the address information of the middle address area (1507a), sector (1507) of optical readout device current accessed.Based on detected current sevtor address, address reader 1507 further produces one of two switching signal Sw1 and Sw2.Specifically, when detecting odd number of sectors, the sector that then shows current accessed is first sector 1707 or the 3rd sector 1709, at this moment produces the first switching signal Sw1.When detecting the even number sector, the sector that then shows current accessed is second sector 1708 or the 4th sector 1710, at this moment produces second switch signal Sw2.
The turn-on frequency of bandpass filter is set to f1=1/22TW, like this from first road 5102 of the first and the 3rd sector 1507 and 1509 and from the crosstalk components conducting in the 3rd road 5107 of the second and the 4th sector 1508 and 1510 and pass to wave detector 5205.Wave detector changes each crosstalk components into voltage respectively.
After receiving the first signal Sw1, selector switch is connected to first sampling holder 5207 to wave detector 5205, and feasible crosstalk voltage from odd number (first and second) sector (1507 and 1509) is transferred to first sampling holder 5207.After receiving the first signal Sw2, selector switch is connected to sampling holder 5208 to wave detector 5205, and feasible crosstalk voltage from even number (the second and the 4th) sector (1508 and 1510) is transferred to second sampling holder 5210.
As a result, 5207 maintenances of first sampling holder are from the crosstalk components on thoughtful corresponding to the inner circular in the first correction data road 32 of Fig. 4.5208 maintenances of second sampling holder are from the crosstalk components on thoughtful corresponding to the outer circle in the 3rd correction data road 33 of Fig. 4.
Like this, the crosstalk components that comparer 5209 compares from the first and the 3rd correction data road 32 and 34, and produce difference signal Sy.Quite similar in this later operating process with the operating process of the optical disc apparatus P5 that above describes with reference to Figure 37 and 38, omitted for simplicity at this.
As indicated above, because the indentation pattern is being write down at the first and the 3rd road 32 and 34 middle parts, can read correction data from second road 33 with the three beams tracking.
In addition, second road 34 is writing down the correction data signal that frequency is t0, and the first and the 3rd road 32 and 34 is writing down the correction data signal of frequency t2, wherein t0 ≠ 1, t0 ≠ n.t1 (n is an integer).Like this, can clearly from first and second roads (32) and (34), detect crosstalk components, and not be subjected to the effect of signals of from second road (33), reading.
In addition, because in this data system, have preset frequency, in second road (32), then can form this correction data district (23) with simple form corresponding to the signal record of a byte unit.Note that 68TW is corresponding to 4 bytes in the data coefficient with 2-10 modulated process.The 7th embodiment
In Figure 43, showed a kind ofly, be used on CD 1 forming the optical disc apparatus in correction data road district according to seventh embodiment of the invention.The structure of the optical disc apparatus of similar in Fig. 8,31,34,35 of the optical disc apparatus P7 in the present embodiment, but following some relate to different aspect each data track of predetermined correction data recording in correction data road district 23.Hereinafter only explanation for forming part that correction data road 23 plays a crucial role other with Fig. 8,31,34 and 35 in identical or similar part for for simplicity, in this omission.
Comprise optical readout device 122 among the optical disc apparatus P7, comprise the laser diode 123 and the pin photodiode 1241 that are used for from CD 1 access information in this optical readout device again.In this optical disc apparatus, be provided for mobile optical readout device 122 is formed at the recording channel on the CD 1 with scanning transporter 58.Like this, optical readout device 122 and transporter 58 have just constituted optical read-out system Os.Focus error signal Sfe is transferred to focus servo circuit 200 from the prime amplifier 125 that is connected to optical readout device 122.Focus servo circuit 200 produces a focus drive signal Sfd who is used to drive the focus control system (not showing) that is contained in the optical readout device Os.Note that this focus servo circuit 200 is corresponding to the focus servo circuit among Figure 34 100.
A correction data controller 210 produces a transporter drive signal Std who is used to control the optical readout device motion, and this signal is transferred to coupled transporter 58.This correction data recording controller 210 also produces the correction data of the correction data that an expression will be recorded in correction data road district 23 and selects signal Src.
Have a plurality of storeies that are used for storing corresponding to the indentation pattern data (this mentions with reference to the description of the drawings hereinbefore) of correction data in the correction data generator 220, for example ROM.Note that for simplicity, in Figure 43, only showed three ROM300,310 and 320, but be not only limited to three ROM.
A laser diode driver circuit 240 is connected to correction data generator 220, be used for the indentation pattern data read from each corresponding ROM, and produce laser two utmost point drive signal Sld that are used to control the laser diode 123 of optical readout device Os (122).This laser diode driver circuit 240 is also connected to laser diode 123 so that laser diode drive signal Sld is transferred to this laser diode.
Optical readout device Os is recorded in each recording channel 32,33 and 34 in correction data district 223 by the represented predetermined correction data of predetermined indentation pattern according to the control handle of signal Std and Src.As indicated above, intaglio trace and indentation size is at interval determined by the spot size Ls that beats laser beam in the above for recovering signal.Certainly, intaglio trace and indentation size at interval also can be by being determined by the spot size of beating the laser beam on CD at record intaglio trace on the CD.
Though above the present invention having been done detailed explanation with embodiment in conjunction with the drawings, for the professional and technical personnel, also can make various improvement, but these changes and version are also in the determined scope of claims of the present invention.
Commercial Application
Even the CD in storing digital information takes place in the situation of physical imperfection or deformation because of gravity And have when not being to be set in the different size of this optical disc apparatus when this CD, also can use this Invention is read digital information from this CD. In addition, used the special of circuit in this optical disc apparatus Electrical characteristics.
Therefore, the CD with the correction entries district that is recording correcting pattern can be sold by manufacturer. The user can comprise by use the optical disc apparatus compensation impact numeral letter of aligning gear of the present invention Number reproducibility, the distortion that produces because of radial skew, tangential tilt and characteristic electron.
In addition, the user is using this CD with the writable type in the application of the invention optical disc apparatus The very first time correcting pattern is write in the compact disc rocordable.
Claims (37)
1, a kind of being used for comprises in the described device by luminous point (Ls) being focused on the recording channel on the CD (1) from the optical disc apparatus (P7) of this recording channel recovering signal (Sd):
One is used to produce one and causes that the first pattern generator device (ROM) of first pattern (SP) of shake takes place recovering signal;
A writing station (122) that is used for described first pattern (SP) is write first recording channel (33) of described CD (1).
2, optical disc apparatus as claimed in claim 1 (P7), described first pattern (SP) that it is characterized in that being written in described first recording channel (33) comprising:
One is positioned at along first indentation (3204) greater than described luminous point (Ls) on the line of collimation of described recording channel (33) extension;
Second indentation (3206) greater than described luminous point (Ls) that is positioned on the described recording channel line of collimation, itself and described first indentation (3204) are separated by less than first preset distance (3205) of described luminous point (Ls) size.
3, optical disc apparatus as claimed in claim 2 (P7) is characterized in that described first and second indentations (3204 and 3206) alternately distribute on described first recording channel (33).
4, optical disc apparatus as claimed in claim 2 (P7), first pattern (SP) that it is characterized in that being written in described first recording channel (33) comprising:
A plurality of being positioned on the line of collimation that extends along described recording channel (33), less than described luminous point (Ls), and be separated by the 3rd indentation (3202) of second preset distance (3201 and 3203) of other any the 3rd indentations (3202).
5, optical disc apparatus as claimed in claim 1 (P7), it is characterized in that also comprising second a pattern generator device (ROM) that is used to produce second predetermined pattern (SR), said write device (122) writes the second and the 3rd recording channel (32 and 34) that is arranged in described first recording channel (33) both sides to described second pattern (SR), is used for by crosstalking causing from the signal (Sd) of described first recording channel (33) reduction from the signal (Sd) of the described second and the 3rd recording channel (32 and 34) reduction.
6, optical disc apparatus as claimed in claim 5 (P7) is characterized in that comprising in the described second and the 3rd road (32 and 34) indentation of a plurality of stochastic distribution.
7, optical disc apparatus as claimed in claim 5 (P7) is characterized in that described first, second has predetermined first, second and the 3rd road wide (TP) respectively with the 3rd road (33,32 and 34).
8, optical disc apparatus as claimed in claim 7 (P7), it is characterized in that described first, second be identical (T1) with the 3rd predetermined road wide (Tp).
9, optical disc apparatus as claimed in claim 7 (P7) is characterized in that the described first predetermined road wide (T2) is less than the described second and the 3rd predetermined road wide (T1).
10, optical disc apparatus as claimed in claim 7 (P7) is characterized in that the described first predetermined road wide (T1) is greater than the described second and the 3rd predetermined road wide (T3).
11, optical disc apparatus as claimed in claim 11 (P4) is characterized in that wherein also comprising:
One is used for described luminous point (Ls) is got on the described recording channel to reduce the optical readout device (Os) of described signal (Sd) from it;
A tracing positional control device (140) that is used for changing the focal position of described optical readout device (Os) by predetermined spacing;
One is used at the amount of jitter measurement mechanism (41) of measuring amount of jitter from the signal (Sd) of described first recording channel (33) reduction;
One is used to detect and makes the minimum jitter position detecting device (120) of the described amount of jitter that measures (Sj) for minimum minimum jitter tracing positional;
One is used to control described tracing positional control device (140) and goes described optical readout device (Os) is arranged at follow-up control apparatus (130) on the described detected minimum jitter tracing positional.
12, a kind of optical disc apparatus (P1) that is used for restoring signal (S) from the recording channel (2 and 33) of the CD (1) that writing down the predetermined pattern (SP) that makes recovering signal (Sd) that shake take place, comprising:
One is used for coming up therefrom to reduce the optical readout device (Os) of described signal (Sd) by luminous point (Ls) being got to described recording channel (2 and 33);
One is used in a predetermined direction the tilting gearing (60) of the predetermined angle (Δ t) of described optical readout device inclination;
An amount of jitter measurement mechanism (41) that is used for from the signal (Sd) of described recording channel (33) reduction, measuring amount of jitter (Sj);
One is used to detect and makes the described amount of jitter that measures (Sj) be minimum minimum jitter angle (θ minimum jitter angle detecting device (50) a);
One is used to control the incline controller (54 and 67) that described tilting gearing (60) tilts to described optical readout device (Os) at described detected minimum jitter angle (Qa).
13, optical disc apparatus as claimed in claim 12 (P1) is characterized in that described predetermined direction is a radial direction with respect to described CD (1).
14, optical disc apparatus as claimed in claim 12 (P2) is characterized in that described predetermined direction is the tangential direction with respect to described CD (1) radius.
15, a kind of optical disc apparatus (P3) that is used for restoring signal (Sd) from the recording channel (2 and 33) of the CD (1) that writing down the predetermined pattern (SP) that makes recovering signal (Sd) that shake take place, comprising:
One is used for coming up therefrom to reduce the optical readout device (Os) of described signal (Sd) by luminous point (Ls) being got to described recording channel (2 and 33);
A focal position control device (110) that is used for changing the focal position of described optical readout device (Os) by predetermined spacing;
One is used at the amount of jitter measurement mechanism (41) of measuring amount of jitter (Sj) from the signal (Sd) of described first recording channel (33) reduction;
One is used to detect and makes the amount of jitter (Sj) of described measurement be the minimum jitter position detecting device (90) of minimum minimum jitter focal position;
One is used to control described focal position control device (110) described optical readout device (OS) is located at the focus control device (100) of described detected minimum jitter focal position.
16, a kind of optical disc apparatus (P4) that is used for restoring signal (Sd) from the recording channel (2 and 33) of the CD (1) that writing down the predetermined pattern (SP) that makes recovering signal (Sd) that shake take place, comprising:
One is used for by luminous point (Ls) being got to described recording channel with from wherein reducing the optical readout device (Os) of described signal (Sd);
A tracing positional control device that is used for changing the focal position of described optical readout device (Os) by predetermined spacing;
One is used at the amount of jitter measurement mechanism (41) of measuring amount of jitter (Sj) from the signal (Sd) of described first recording channel (33) reduction;
One is used to detect and makes the amount of jitter (Sj) of described measurement be the minimum jitter position detecting device (120) of minimum minimum jitter tracing positional;
One is used to control described tracing positional control device (140) described optical readout device (Os) is arranged at the follow-up control apparatus (130) of the described minimum jitter tracing positional that measures.
17, a kind of by luminous point (Ls) being focused on the recording channel that forms on the CD (1), be used to make signal (Sd) to be recorded in optical disc apparatus (P7) on the recording channel of described CD (1), comprising:
A first pattern generator device (ROM) that is used for producing first pattern (SP) that causes that described recovering signal (Sd) takes place to shake;
A writing station (122) that is used for writing described first pattern (SP) at first recording channel (33) of described CD (1).
18, optical disc apparatus as claimed in claim 17 (P7) is characterized in that being written in described first pattern (SP) of described first recording channel 33 and comprises:
One is positioned at along on the line of collimation of described recording channel (33) extension, greater than first indentation (3204) of described luminous point (Ls);
One is positioned on the described recording channel line of collimation, and be separated by second indentation (3206) greater than described luminous point (Ls) of a preset distance (3205) of the described first record indentation (3204) less than described luminous point (Ls).
19, optical disc apparatus as claimed in claim 18 (P7) is characterized in that described first and second indentations (3204 and 3206) alternately are distributed on described first recording channel (33).
20, optical disc apparatus as claimed in claim 17 (P7) is characterized in that comprising in described first pattern (SP) that is written in described first recording channel (33):
A plurality of being positioned on the line of collimation that extends along described recording channel (33), and be separated by the 3rd indentation (3202) less than described luminous point (Ls) of one second preset distance (3201 and 3203) of other the 3rd indentations (3202).
21, optical disc apparatus as claimed in claim 17 (P7), it is characterized in that wherein also comprising second a pattern generator device (ROM) that is used to produce second predetermined pattern (SR), said write device (122) writes described second pattern (SR) in the second and the 3rd recording channel (32 and 34) that lays respectively at described first recording channel (33) both sides, be used for making the signal from described first recording channel (33) reduction cause with the described second and the 3rd recording channel the signal cross-talk that reduces.
22, a kind of optical disc apparatus (P1) that is used for, by luminous point (Ls) being focused on the described recording channel on the CD, from being formed on the CD (1) of a plurality of recording channel recovering signals on the CD (1), comprising:
First recording channel (2) that is used to write down described signal;
One is used to write down second recording channel (33: 3,23) that first predetermined pattern (SP) of shake takes place the signal that can make therefrom reduction.
23, CD as claimed in claim 22 (1) is characterized in that comprising in described first pattern (SP) that writes second recording channel (33):
One is positioned on the line of collimation that extends along described recording channel (33), and greater than first indentation (3204) of described luminous point (Ls);
One is positioned on the described line of collimation and greater than second indentation (3206) of described luminous point (Ls), and itself and described first indentation are at interval less than first preset distance (3205) of described luminous point (Ls).
24, CD as claimed in claim 23 (1) is characterized in that described first and second indentations (3204 and 3206) alternately are distributed in described second recording channel (33).
25, CD as claimed in claim 22 (1) is characterized in that being written in described first pattern (SP) of described second recording channel (33) and comprises:
A plurality of the 3rd indentations (3202) that are positioned on the line of collimation that extends along described recording channel (23) less than described luminous point (Ls), and itself and any other the 3rd indentation second preset distance (3201 and 3203) of being separated by greater than described luminous point (Ls).
26, CD as claimed in claim 23 (1), it is characterized in that described first indentation (3204) extends one first predetermined length 6T along described line of collimation direction, described first indentation (3206) extends to the second predetermined length 7T along described line of collimation direction, described first preset distance (3205) is length 3T, and described T is that the position of this passage is long.
27, CD as claimed in claim 25 (1), it is characterized in that described the 3rd indentation (3202) extends to the 3rd predetermined length 3T along described line of collimation direction, and three indentation (3202) adjacent, one the 3rd preset distance 7T of being separated by with one of them, and three indentation (3202) adjacent with another, one the 4th preset distance 6T of being separated by, described T is that the position of this passage is long.
28, CD as claimed in claim 22 (1) is characterized in that being written in described first pattern (SP) of described second recording channel (33) and comprises:
Described first indentation (3204) is one first predetermined length greater than described luminous point (Ls) along described second recording channel (33) longitudinal direction development length;
One second indentation (3206) is one second predetermined length greater than described luminous point along described second recording channel (33) longitudinal direction development length, and is positioned at one first side of described first indentation (3204) and one first preset space length (3205) less than described luminous point (Ls) of being separated by with it;
One the 3rd indentation (3202) is being surveyed described second recording channel (33) longitudinal direction development length and is being one the 3rd predetermined length less than described luminous point (Ls), and be positioned at the opposite side of described first indentation (3204), and with described second indentation (3206) one second preset space length of being separated by greater than described luminous point (Ls).
29, CD as claimed in claim 28 (1), it is characterized in that described first pattern (SP) repeatedly is formed on described second recording channel (33), the spacing between described like this 3rd indentation (3202) and next described first indentation (3206) is one the 3rd preset space length (3201) greater than described luminous point (Ls).
30, CD as claimed in claim 28 (1) is characterized in that described first predetermined length is 6T; Described second predetermined length is 7T; Described first preset space length is 3T; Described the 3rd predetermined length is 3T; Described second preset space length is 7T, and described T is that the position of passage is long.
31, CD as claimed in claim 29 (1) is characterized in that described the 3rd preset space length (3201) is 6T, and described T is that the position of passage is long.
32, CD as claimed in claim 29 (1), it is characterized in that wherein also comprising the 3rd and the 4th recording channel (32 and 34) that is positioned at described second recording channel (33) both sides, this recording channel is used for crosstalking by producing the signal (Sd) that reduces from described second recording channel (33) from the signal that wherein reduces.
33, CD as claimed in claim 32 (1) is characterized in that comprising in described third and fourth recording channel (32 and 34) indentation of a plurality of random alignment.
34, CD as claimed in claim 32 (1) is characterized in that described second, third has first, second and the 3rd predetermined road wide (TP) respectively with the 4th recording channel (33,32 and 34).
35, CD as claimed in claim 34 (1), it is characterized in that described first, second be identical (T1) with the 3rd predetermined road wide (TP).
36, CD as claimed in claim 34 (1) is characterized in that the described first predetermined road wide (T2) is less than the described second and the 3rd predetermined road wide (T1).
37, CD as claimed in claim 34 (1) is characterized in that the described first predetermined road wide (T1) is greater than the described second and the 3rd predetermined road wide (T3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB961996552A CN1139922C (en) | 1996-01-16 | 1996-01-16 | Optical disk apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB961996552A CN1139922C (en) | 1996-01-16 | 1996-01-16 | Optical disk apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1207821A true CN1207821A (en) | 1999-02-10 |
| CN1139922C CN1139922C (en) | 2004-02-25 |
Family
ID=5129560
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB961996552A Expired - Lifetime CN1139922C (en) | 1996-01-16 | 1996-01-16 | Optical disk apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1139922C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109968378A (en) * | 2017-12-28 | 2019-07-05 | 深圳市优必选科技有限公司 | Robot and its distance measuring method, storage device |
-
1996
- 1996-01-16 CN CNB961996552A patent/CN1139922C/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109968378A (en) * | 2017-12-28 | 2019-07-05 | 深圳市优必选科技有限公司 | Robot and its distance measuring method, storage device |
| CN109968378B (en) * | 2017-12-28 | 2021-09-17 | 深圳市优必选科技有限公司 | Robot and distance measuring method and storage device thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1139922C (en) | 2004-02-25 |
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