TW200822088A - Optical drive and integrated calibration method - Google Patents

Abstract

A method off calibrating an optical drive (1) is described here. The method comprises performing calibration of a focus offset and a tilt offset simultaneously after a record carrier (2) is inserted in the optical drive (1). The above technique generally improves the optical drive's overall recording and reading performance and is useful for all optical disc recording and playing devices.

Description

200822088 IX. Description of the invention: [Technical field to which the invention pertains] The present invention (4) relates to an optical disk drive'. More specifically, it relates to a focus offset and tilt offset correction method of the (four) machine. [Prior Art] US 20_31060 discloses a method of correcting the movement, focus shift and radial offset of an optical disc device, wherein the poly = Ο is performed independently.

G m... 疋 “疋 Different tilt correction points and measurement of jitter, 进行 to perform tilt offset correction. Similar to positive. This method does not produce the best correction result, and the correction holds the second shift weight. This usually increases the disc player. The startup time and the most = greater than 1 then affect the response time of the CD player to the user command. On the X-day, the correction method for the time gate required to reduce the focus offset and tilt offset of the optical disk drive is advantageous. The light-spinning time required for the time between the old and the new (four) _. The material reduction offset [invention] The method of the correction-disc drive is described here. The financial record carrier is inserted in the optical disk drive. - Correction of the tilt offset. The phase in the middle performs a pair-focus shift and in the optical disc drive described herein, the optical system is used for scanning - first T2, ..., τη). The magnetic track (Tl, -beam...the objective lens is used to generate the beam generator). The optical disk drive is included in the optical fiber to focus on the record carrier. Detector for detecting a 123904.doc 200822088 reflected light a controllable focusing actuator for aligning the objective lens, 6 the record carrier, recording the reference plane and shifting the handle; and a controllable tilt actuator for making the objective lens Rotating on the record carrier. The optical disk drive further includes a first memory, the first memory is configured to store a corrected data point. The optical machine further includes a second memory, the second memory is configured to Storing—the best focus offset value is a good tilt offset value. The optical machine further includes: a control circuit for receiving the input end of the signal from the material (four) 11 and having a facet to the focus actuation The control input and one of the tilt actuators control the output of the input. The control circuit further includes an integrated correction unit configured to simultaneously insert the record carrier into the optical disk drive Correction of a focus offset and a tilt offset is performed. Further, the method of correcting the optical disc drive can be implemented by using a computer program. [Embodiment] FIG. 1 succinctly illustrates one An example of a disc drive 1 (for example, a dvd machine), which is suitable for writing information to a record carrier 2 (usually a DVD) and/or reading information from a record carrier 2. For rotating the record carrier 2, a disc The machine comprises a motor 4. The motor 4 is usually fixed to a frame defining a rotating shaft 5 = the holding record carrier 2, the optical disc (1) may comprise - a rotating or clamping bushing /, in the case of the spindle motor 4, mounted to the motor 4 on the spindle 7.

The T-disc machine 1 includes an optical system 30 for scanning the magnetic carrier (T1, human one, ..., Τη) of the record carrier 2. More specifically, the optical system 30 encloses a light generator 31 (e.g., a laser diode) of the beam 32a. The light a passes through the beam splitter 33 and the objective lens 34. The objective lens 34 focuses the light 123904.doc 200822088 bundle 32b (on a focus F) onto the record carrier 2. The light beam 32b is reflected from the recording medium 2 (reflected light beam 32c) and passes through the objective lens 34 and the beam splitter 3 3 (light beam 32d) to reach the optical detector 35. Use the Cartesian coordinate system XYZ. The rotating shaft 5 is a Z axis. The radial direction is the χ axis (perpendicular to the Z axis such that the focus F lies in the XZ plane). The tangent direction is the γ axis (perpendicular to the X and Z axes). The polar coordinate system (r, φ) is also used to define the coordinates of the record carrier 2. To achieve and maintain accurate focus of the beam 32b at the desired location (on the record carrier 2), the objective lens 34 is mounted for axial (Z-direction) displacement. Further, the actuator system 40 of the optical disk drive 1 includes a focus actuator 42 that is configured to axially displace the objective lens 34 relative to the recording reference plane of the record carrier 2. Due to the spherical aberration (refractive index of the substrate), the focus F of the light beam on the record carrier 2 changes by an offset value. To eliminate these effects, focus offset correction is performed to restore the focus offset to the appropriate condition. The record carrier 2 can also be subjected to tilting. The inclination of the record carrier 2 is defined as the case where the recording reference plane of the record carrier 2 is not perpendicular to the rotation axis. The record carrier 2, which is tilted as a whole with respect to the laser beam (e.g., because the motor shaft is tilted relative to the frame and therefore the amount of tilt depends on the position of the record carrier) can cause tilting. In particular, DVD systems with relatively large numerical apertures (NA) are easy to tilt. Generally, in a disc player 1 having tilt correction, the objective lens 34 is rotatable, and the optical disc drive 1 includes a tilt actuator that controls the tilt position of the objective lens 34. To this end, the objective lens 34 is mounted for rotation about a rotational axis oriented parallel to the gamma axis such that the optical axis 36 of an objective lens 34 lies in the XZ plane. Preferably, the rotational axis is coupled to the optical center of the objective lens 34 by 123904.doc 200822088. The angle of rotation Φ is defined as the angle between the Z-axis and the optical axis % of the objective lens 34. Furthermore, the actuator system 40 of the optical disk drive 1 includes a tilt actuator 43, which is configured to rotate the objective lens 34 relative to the record carrier 2. In general, the angle Φ should be zero, however, the record carrier 2 is generally not flat due to manufacturing process changes. The record carrier 2 is curved in the radial direction and the ring direction. Therefore, the optical system 3 cannot scan the recording track with its optical axis perpendicular to the recording surface of the recording carrier 2. The deviation of the rotational angle Φ from the optical axis 36 of the objective lens 34 is referred to as a tilt offset. To eliminate these effects, tilt offset correction is performed to restore the tilt offset to the appropriate condition. The optical disc drive 1 further includes a control circuit 90 having a first output end 92 coupled to a control input of a motor 4, a second output end 93 coupled to a control input of a radial actuator 41, and a A third output terminal 94 coupled to the control input of a focus actuator 42 and a fourth output terminal coupled to the control input of a tilt actuator 43 are coupled. The control circuit is designed to produce: at its first output 92, a control signal ScM for controlling the motor 4 is generated, and at its second output 93, a control signal for controlling the radial actuator 41 is generated The SCR, at the eight first output 94, generates a control signal SCF for controlling the focus actuator, and at its fourth output 95, generates a control signal SCT for controlling the tilt actuator 43. 123904.doc 200822088 The control circuit 90 is additionally and rightly cooled from the optical detector 々 reading input 91, which is used to receive the == record carrier 2 (see figure) to read the data or to write the data. In order to achieve this figure, a good focus and tracking effectiveness is achieved: take I, focus offset correction and tilt offset correction. == Offset correction and tilt offset correction are usually based on jitter. The correction and tilt offset correction is usually based on a radial calibration method in which focus offset correction and tilt offset correction are performed independently. By setting the slope punctuality and measuring the jitter signal Tilt offset correction. Similar-number: Π focus offset correction. Since the tilt offset and focus offset are not independent, this method takes more time and is usually inaccurate. The tilt offset correction U will affect the focus offset correction result, and Fig. 2 and Fig. 2b schematically illustrate the correction result obtained by performing the focus offset correction and the tilt offset correction independently in the dvd machine (refer to Fig. 2 first. Perform tilt offset correction first) and then Perform focus offset Correction. The port is shown in Figure 2a and Figure 2b. 'The best focus offset and optimal tilt offset obtained using this method are not the actual best focus offset and the actual optimal tilt offset. In addition, this method usually occupies Less. This method usually requires more time to start and execute the best power correction (〇pc) program for recording. This usually affects the response time of the CD player to user commands. For example, during the (4) program, execution is based on Focus offset correction of the radial tracking error signal and = skew offset correction to obtain the best compliance performance during recording. After recording, to improve the readback performance on the OPC area, perform jitter-based: Poly123904. Doc 200822088 == tilt offset correction. Focus offset correction and tilt-over-hanging total leaves take more than 2 seconds, which increases the time spent on coffee. This usually affects the overall continuity of playback and recording. The method of performing small line shift correction and tilt offset correction:: This method simultaneously performs focus offset and tilt offset correction. This method performs focus offset correction and offset simultaneously in 3D space. Positive. Set the convergence offset and the tilt offset correction point in the first dimension and the second dimension, respectively, and measure the positive signal in the r-th only quantity and point you on the glitch. To replace the two separation corrections, and thus the reduction of the positive timing, for the 0PC, instead of performing 4 calibrations during the 〇pc, the unexamined method performs only 2 corrections (one for reading and one for each). And the total correction time is reduced to be less than (four) less. The overall read and record performance of the CD player is substantially improved. In addition, the playback and recording response time of the commander/good CD player is schematically shown using FIG. Selected to perform the focus correction and tilt offset correction correction points U at the same time (see also the actuators to move the objective lens and adjust the focus offset, tilt offset and radial offset) shift. The correction point is selected based on the maximum allowable shift of the actuator. These correction points are stored in the memory of the CD player. Figure 3 shows 17 correction points, but when the feng ya 丨 逋 而 要 要 要 要 最少 最少 最少 最少 最少 最少 最少 最少 最少 最少 最少 最少 最少 最少 最少 最少 最少 最少 最少 最少 最少 最少If the number of stable measurement points is less than 6, the correction method cannot be performed. In order to obtain a good and accurate correction of the surname, usually more than 6 points are used' and this is one of the basis for selecting 17 correction points. If all 17 points are stable, then all 17 points are used for surface pseudo-123904.doc 10-200822088 to obtain a parabolic surface. After that, the correction signal (jitter, here means that the offset value is set. The 6 stable points can be stabilized in the measurement system. Point. Any of the 17 points of the release point and the rain show. Between the fields and the fields, but these stable points can be determined around the phase and the optical pickup unit and the ^ ^ ^ , . . . , moving mechanism 进行 进行 进行 进行 进行 进行 进行 进行 进行 进行 进行 进行 = = = = = = If there is no f μ point too far during the measurement of the error signal, then setting the focus offset and tilt offset to a distance of Γ, " will result in poor compliance, and thus result in reading ^ 贝 or 二白The bad sway signal of the disc is the same. This causes the HF phase-locked loop to lock the # M ^ ^. The other factor to be considered is the dithering ^ early crossing the river (that is, south of 16% (which is the current decoding ^ ^ The guilty detection limit h, shell, J correction point will be regarded as unstable point. 2 work: the case of the disc T 'set the focus offset and tilt offset to the best point from the view There is a possibility of pinching off the track at a long time. In one possible embodiment, a 3-dimensional relationship between focus offset, tilt offset and jitter > A is obtained. The jitter signal is substantially minimized to obtain the optimum focus offset value and the optimal read tilt offset value. The step of obtaining a 3-dimensional relationship between the focus offset: the tilt offset and the jitter signal includes the following inner valley. The focus shift step size, the tilt offset step size, the maximum allowable focus offset value, and the minimum allowable focus offset value are selected. The optical pickup unit is selected for the focus offset adjustable range and the tilt offset adjustable range. The focus S-curve (the focus offset adjustable range) is determined by the focus offset correction range. The oblique offset weight range is the adjustable tilt angle of the optical pickup unit (the currency is d: 12 to 15 mrad). ^. The maximum step size for correction is then borrowed from 123904.doc 200822088. The adjustment range is calculated by the point (ie, 6 points) as described in Figure 3. "There is no effective stable point sufficient to perform surface fitting." , using a J step. (ie, in the case where the number of effective stabilization points is less than 6.) This procedure is also referred to as the adaptive correction step size. In the example disclosed herein, 2 is used previously. The reason for the ten step is '' - some discs and / or,: disc player * tongue, oblique offset and focus 35 shift stable adjustable range is very small compared to the range allowed by the optical pickup unit. In some cases, r first The adjustable tilt range of the pickup unit is at the lower limit, and the disc playing or tracking is poor. The minimum jitter is very high, such as coffee. In this case, the 'focus offset and/or tilt offset are larger. Shift will result in jitter up to 16%. To achieve the minimum of the effective correction point, use a smaller offset step size. In other words, reduce the correction coverage. Select 17 corrections to cover the typical tilt according to the product entity adjustable range gauge And the focus offset can adjust the cost. In order to obtain 6 effective stable points and obtain the best focus offset and the optimal tilt offset, the correction step size is usually not = large. Therefore, if the number of correction points is less than 6, the adaptive step size is introduced by reducing the step size by half (or more than half). Determine the jitter signal at different focus offset values and tilt offset values. The procedure for performing read correction and obtaining the best read focus offset value and the best read tilt offset value is described below. The possible results of this procedure are illustratively illustrated in Figure 4 and involve the following steps: 1. Start with phase Ν = ι. 2. Set the focus shift mode and tilt offset mode to the on-slope mode. 123904.doc -12- 200822088 3. Set the ramp mode for phase N. 4. Set the focus offset and tilt offset to the preset values. 5. Set focus offset = focus offset + focus _ step size; ± tilt offset = tilt offset + tilt - step size; 6 · take the jitter signal. 7. Check that all calibration points in phase ^^ are complete. If the correction points are complete, go to step 8, otherwise repeat steps 5 through 7.

8. Check N疋No>4. If N>4, go to step 1〇, then go to step phase N N+1 and check if N is > 4, if N>4, go to step 10' otherwise repeat steps 3 to 8.夕 〇· Form a vector for reading the jitter signal. 11 · Calculate the first-order surface model coefficients. 12. Curve fitting focus offset value Obtain a 3-dimensional relationship. Tilt offset value and jitter signal value and

- Forbearance of focus offset and tilt offset are slope upshift = slope focus offset is ramp down mode and tilt bias means focus offset and tilt offset are both skewed:::式' and N=4 The focus offset is the ramp-up mode and the square tr-slope down mode. The parameters and slopes to be corrected are changed as appropriate. Time: Master 2, the measurement time is roughly equal to the execution - the rotation of the disc is required: the measurement result of the jitter signal value is the value of the rotation of the disc. Figure W is intended to (iv) an example of the results obtained by using the above materials to read the household 123904.doc -13- 200822088. This program is executed for 0¥0 machine 1 (see Fig. 。). The DVD player used is a DVD recorder with a ±86〇 nm focus shift adjustable range and a tilt angle of ±9 mrad. The coded focus offset value and the coded tilt offset value are plotted against the jitter signal value. The reason for using the encoded values is to make the implementation more general (so that the implementation can be applied to different types of optical recording devices). Since it should be clear to those skilled in the art, the second-order model can be expressed as z = ax + a2x + a3y + a4x2 + a5y2 + a6xy.... (1) Using the coding variable, matrix based on jitter correction And the vector Z should be (see Table 1) x = 123904.doc -2.6 0 6.76 0 (Γ "22.87" 0 a 3 0 9 0 12.1 -2 0 4 0 0 17.14 0 - 2 0 4 0 10.72 2 - 2 4 4 - 4 10.78 -2 - 2 4 4 4 18.50 1 -1 1 1 -1 9.94 1 1 ~ 1 1 1 1 11.07 0 0 0 0 0 ζ = 9.50 1 1 1 1 1 1 10.02 1 1 1 1 1 9.21 ~ 2 2 4 4 - 4 15.59 2 2 4 4 4 10.00 0 2 0 4 0 9.35 2 0 4 0 0 9.76 0 3 0 9 0 11.42 2.6 0 6.76 0 0 _ 9.72 _ The estimated/predicted coefficient can be calculated as Αζζ{Χτχγλχτζ.............(2) -14- 200822088 where χΤ is the inverse matrix of the matrix χ transposed matrix (XX) is (χτχ), and A=[aj a2 a3 A4 a5 a6] 实际 In actual implementation, the component is determined by a predefined correction point and is called matrix Β. This matrix value is stored in the memory of the CD player i. The measured jitter value is completed. After all measurements, perform 5 Multiplying the surface model to calculate a single coefficient of second order.

Figure 4 illustrates an example of a second order surface relationship. Using the correction data 编码 (coded focus offset value), Υ (coded skew offset value) and 2: (measurement jitter signal), calculate the coefficients illusion, heart, heart, ~, illusion and ~. The best read focus offset value and the best read tilt offset value are then calculated as: ^ opt {ieoptimumreadfocusoffset) = (2α2α5 -α3α6)/(α62 -4α4α5).......... (3) Y〇pt(Jeoptimumreadtiltoffset, - - /^^4^5 )...........(4) Optimal reading focus offset value and optimal read tilt offset The value is the encoded value and will be decoded before being used to read data from the DVD. Table 1 A -------------—— ________1 _ 聚焦 Focus offset tilt (mrad) X Υ —--- ζ 1 -743 0.0 22 87 2 0 -4.922 - ^^0 9% J i -1? 1 3 -572 0.0 -2 a __ 丄i _ 17 14 4 0 -3.281 0 ___^ 10 72 5 572 -3.281 2 ------ ΊΓ —一 _ -2 10.78 6 572 - 3.281 -2 ----- 18 5 7 286 -1.640 1 1 丄^ _ 9 94 8 -286 -1.640 7\ ^ yy^__ 11 07 9 0 0.0 ____ Scythe '-- 〇5 10 - 286 1.640 -1 y, J__ 10.02" 123904.doc -15- 200822088

Table 1 shows an example of the read correction result obtained by the DVD player 1 (refer to Fig. 1). The total correction point (in the DVD player) is set to a total of 17 points as shown in Fig. 3 so that the system is throughout The 稳定 correction point, the focus offset step size, and the tilt offset step size are determined in a substantially stable manner during the calibration process. This is performed to ensure accurate surface fitting and prediction of the jitter to the focus offset surface and the tilt offset surface, such that The optimum setting can be accurately obtained. Due to the sensitivity of the focus offset and tilt offset to the influence of the CD player system (affecting the tracking performance), the range of the allowable focus offset adjustable range and the tilt offset adjustable range is used. An unstable state can be reached when the focus offset and/or tilt offset are set too far from the optimal point, in which case the radial circumstance or ^^# can be adversely affected (eg, when the disc When the quality is very poor, such as in the case where the thickness of the disc substrate layer c is substantially different from the disc standard.) To eliminate this situation: If i·measured HF jitter level > 13% ii · Exist due to poor HF Some phase lockbacks due to signal quality Locking the early ones will reduce the focus offset step by half (even if half a step still cannot collect enough stable correction points), the step size can be repeated repeatedly. The phase-locked loop fault is usually at the system clock. This can only occur when a bad HF signal cannot be locked. This usually occurs when the HF signal is bad (bad eye diagram, bad hf signal is not correct for 123904.doc •16- 200822088 private, modulation or when the focus offset value and tilt offset value are far from the most Good focus offset value and tilt offset value) : In the data shown in Table 1, 'the best focus offset is 255 18 _ and the optimal tilt offset is 丨.21 mrad. The minimum jitter is 8 2 %. Under similar conditions, when using the separate calibration method, the following values are obtained: 277 73 nm best focus offset ' _9 〇 4 job ^ optimal tilt offset. Minimum jitter is 9.2%. Observe, Using the disclosed 3D read correction method, the HF^ jitter performance is increased by 1%. 聚焦In the manufacture of the optical disk drive 1 (see Figure (10), the focus offset correction and tilt offset correction are performed depending on the disc type and the rotational speed. The correction value is stored in the optical disk drive 1. Stored in the light This value in the disc drive is used as a preset value. During the subsequent start-up, the 3-dimensional read correction is performed. The best read focus offset value and the best read tilt offset value obtained are based on the area. Stored in the memory in the CD player! The stored value is used to read the data. Essentially, the disclosed read correction procedure is based on simultaneous execution of focus offset correction and tilt offset correction. The 3-dimensional relationship between the tilt offset and the jitter signal. The optimal read focus offset value and the optimal read tilt offset value are obtained from the 3-dimensional relationship. The 3-dimensional read correction method is usually improved, accurate ( • It is known that the system reads the tilt offset and reads the focus offset, which can generally improve the overall read performance of the optical disc drive. : Again: In the embodiment, a 3-dimensional relationship between the focus offset, the tilt offset, and the radial tracking & difference k is obtained. The optimum write focus offset value and the optimum write tilt offset value are obtained at a radial = substantially large error signal. " The convergence between the "," offset, tilt offset, and radial tracking error signals. 123 123.doc • 17- 200822088 The steps of the dimensional relationship include the following: · Obtain the focus offset step, tilt offset step The long, maximum allowable focus offset value and the maximum allowable tilt offset value are as described above. The possible results of this procedure are schematically illustrated in Figure 4 and relate to the following steps, where phase N = i. 2 Mode Presets the focus shift mode and tilt shift mode to ramp up Set the ramp mode to phase N. 4 Set the focus offset and tilt offset to the preset value. Set focus offset = focus offset + focus - Step tilt offset = tilt offset + tilt _ step length 6. Measure peak to peak radial tracking error signal. If the corrections 7 check whether all the correction points in phase N are complete points, Then go to step 8, otherwise repeat steps 5 to 7. Otherwise go to step 8. Check if N > 4. If N > 4, go to step 1 step 9. 9 · Set phase N = N + 1; Check if N is > 4, if N > 4, go to step 10, otherwise repeat steps 3 to 8. 10. Form a vector for measuring the radial tracking error signal. 11 · ef ^ - order surface model coefficient. 12 · Curve fitting focus offset value, tilt resistance top offset value and heading error signal value and Obtain a 3-dimensional relationship. It should be noted that the measurement time is substantially equal to the time required to perform the rotation of the disc - so that the measurement result of the radial tracking error signal value is in the rotation of the disc 123904.doc 18 200822088 The average value can also be measured by the energy measurement of the amplitude of the wobble signal. The non-radial tracking error signal, and Figure 5 schematically illustrates an example of the result of the writing correction using the above procedure. 1 (See Fig. 1) The 聚焦 ^ ^ % % % 。 。 编码 编码 编码 编码 编码 编码 编码 编码 编码 编码 编码 编码 编码 编码 编码 编码 编码 编码 编码 编码 编码 编码 编码 编码 编码 编码 编码 编码 编码 编码 编码 编码 编码 编码Use correction shirt (code

T-focus offset value), γ (coded skew offset value), and 2 (normalized radial orbital error) count nasal coefficients π π # 5 4... and ~. Then calculate the best write focus offset value and the best write tilt offset value as ^0PKi-e.optimumwritefocusoffset) = (2〇2^5 ~ ^3^)/— 4ί24α5) (5) Y〇 Pt (Le .optimumwritetiltoffset) = (2a3a4 - a2a6) / (a62 - 4a4a5)...........(6) The best writer focus offset value and the best writer tilt offset value are the encoded values. And will be decoded before being used to record material on the DVD. The correction point, the gather shift step, and the tilt offset step n are determined in such a manner that the system is mostly stable throughout the calibration process to ensure that the radial trace error signal or the wobble signal amplitude is on the focus offset surface and The accurate surface fitting and system of the tilting surface makes it possible to accurately obtain the ideal optimum A. Sensitivity to the effect of force focus offset and tilt offset on the compliance performance of the disc drive, using a range that is less than the allowable focus offset adjustable range and the tilt: shift adjustable range. When the focus offset and/or tilt offset » is again set too far from its optimum point, a radially unstable rail with state instability can occur. To eliminate this, if the number of valid correction points for recording is less than 6, or 123904.doc -19- 200822088 ii · If a 彳5a # & semi-two-way paranoia is detected, the focus offset step will be The reduction correction and the tilt offset correction are performed during the manufacture of the optical disk drive, and the focus bias I is performed to store the positive value in the optical disk drive 1. De Ο u = CD player k this value to make a preset value. During the subsequent start-up, order... The optimum write focus offset value and the optimum-input tilt offset value obtained are stored in the recorder in the disc player according to the area. Stored values are used to record data. ~1: The correction procedure is not written on the shell, which is based on simultaneous execution of the focus offset X and tilt offset correction. A 3-dimensional relationship between the focus offset and the tilt offset disk radial tracking error signal is obtained. The optimum write focus offset value and the optimum write tilt offset value are obtained from the 3-dimensional relationship. The 3-dimensional write correction method energizes to improve the correction accuracy and obtains the system write tilt offset and write poly offset. The overall recording performance of the optical disk drive can usually be improved. ..., referring now to Figure 1, the optical disk drive 1 can be modified to perform the positive method as disclosed in the embodiments. To this end, the optical disk drive 1 includes a first memory plus, and the first memory 2_ is configured to store corrected data points. In addition, the optical disc drive 1 includes a second memory block configured to store an optimal read m shift value, an optimal read tilt offset value, an optimum write focus offset value, and The best write tilt offset value. The component χτ is calculated by the storage correction (4) and is included in the first memory of the CD player. The control circuit 90 (see FIG. υ includes an integrated correction unit chest configured to simultaneously perform correction of focus offset and tilt offset after inserting the record carrier into the optical disk drive, as in the embodiment T〇^904.doc -20- 200822088 Description A recorder or player with a CD player can correct the tilt offset, thereby improving the recorder/player focus offset/read performance. In addition, the cast record carrier 2 is also at least one recording operation. The self-recording executable can be implemented despite the use of DVD players and DVD discs.

7 However, the calibration method can be applied to all types of optical disc media and optical: for example, 'single write media and multiple writes can record first disc RW, pre-RW, DVD+RW, Blu-ray disc). Those skilled in the art can implement the described embodiments of the method of correction either in software or in both hardware and software. Other variations to the disclosed embodiments can be understood and effected by the teachings of the invention. The use of the verb "comprise" or "comprising" does not exclude the claim The use of the indefinite article “a” before an element or step does not exclude the existence of the plural.

Or steps. The drawings and the description are to be regarded as illustrative only and not limiting. X In summary, a method of calibrating an optical disk drive is described. The method includes performing corrections for focus offset and tilt offset simultaneously after inserting the record carrier into the optical disk drive. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 schematically illustrates an exemplary DVD player; FIGS. 2a and 2b schematically illustrate the focus shift by independently performing 1 "H904.doc •21 - 200822088 in an exemplary DVD player; Correction and tilt offset calibration Fig. 3 schematically shows the selected and the result; D, the correction point of the π-spot focus offset correction and the tilt offset correction in the exemplary DVD player; Explain the reading correction result obtained by simultaneously performing an offset correction and tilt offset correction in an exemplary dvd machine.

Fig. 5 unintentionally illustrates a write correction result obtained by simultaneously performing $ offset correction and tilt offset correction in an exemplary DVD player. Ding Focus [Major component symbol description] 1 CD player 2 Record carrier 4 Motor 5 Rotary shaft 6 Clamping sleeve 7 Spindle 30 Optical system 31 Light generator 32a Beam 32b Beam 32c Beam 32d Beam 33 Beam splitter 34 Objective lens 35 Optics Detector 36 optical axis 123904.doc -22· 200822088 Γ

40 Actuator system 41 Radial actuator 42 Focusing actuator 43 Tilting actuator 90 Control circuit 91 Read signal input 92 First output 93 Second output 94 Third output 95 Fourth output 1000 Integrated Correction Unit 2000 Memory 2100 Memory F Focus ScF Control Signal ScM Control Signal ScR Control Signal Sct Control Signal Sr Read Signal Ti, Tn Track 123904.doc -23-

Claims (1)

200822088 X. Patent application scope: 1 . A method for correcting an optical disk drive (1), the method comprising: simultaneously performing a focus shift and after inserting a record carrier (2) into the optical disk drive (1) Correction of a tilt offset. 2. The method of claim 1, wherein simultaneously performing the correction of the focus offset and the tilt offset further comprises: obtaining a 3-dimensional relationship between the focus offset, the tilt offset, and a jitter signal And obtaining an optimal read focus offset value and an optimal read tilt offset value at substantially the minimum of the jitter signal. 3. The method of claim 2, wherein the method further comprises: reading data from the record carrier using the optimal read focus offset value and the optimal read tilt offset value. 4. The method of claim 3, wherein the data packet is read from the record carrier. 5) wherein simultaneously performing the focus offset and the tilting offset further comprises: obtaining a 3-dimensional relationship between the focus offset and the signal; and k-tracking error in the radial direction (4) The error signal is substantially at the maximum where the focus offset value and the best write tilt offset value are obtained. The method of claim 5, wherein the method further comprises: using the optimal φ φ I μ ..., the focus offset value, and the optimal _ A u 倾斜 tilt offset 123904.doc 200822088 The value 'records data on the record carrier. Recording the data package 7. The method of claim 6, wherein the record carrier comprises: recording the data on a DVD or _CD or a Blu-ray disc. The method of claim 2, wherein the method further comprises: / optimally taking a focus offset value and the optimal read tilt offset value. 9. The method of claim 5, wherein the method further comprises: storing 4 optimal write focus offset values and the best write tilt offset (1), comprising: optical system (10) for scanning a magnetic track 2 of a record carrier (7), Τη), the optical system comprising: a beam generator 31) generating a beam (32a); an objective lens (34), It is used to focus the first beam on the record carrier (7); an optical accumulator (%) for detecting a reflected beam; - a focus control actuator (42) for making The objective lens is axially displaced with respect to the recording reference plane of the record carrier; - the tilt actuator (43) can be controlled to rotate the objective lens relative to the § record carrier; ―, a memory (2ΠΗ)) 'It is configured to store calibration data points; -. a body (2GGG) 'which is configured to store a best focus offset value and an optimal tilt offset value; and a control circuit (90) having an input for receiving a signal from the optical controller And having an output that is switched to one of the focus actuators and controls the input terminal of one of the tilt actuators, wherein the control circuit further comprises: an integrated right unit (1〇〇) 〇), which is configured to perform correction of a focus offset and a tilt offset simultaneously after inserting the record carrier (2) into the optical disk drive. 11. A recorder comprising a disc drive as claimed in claim 1 . 12. The recorder of claim 11, wherein the recorder is a DVD recorder or a CD recorder or a Blu-ray disc recorder. 13. A player comprising a disc drive as claimed in claim 10. 14. The player of claim 13, wherein the player is a DVD player or a CD player or a Blu-ray disc player. 15. A computer program comprising a code component for performing a method of calibrating an optical disk drive (1), wherein the method comprises simultaneously executing a right after inserting a record carrier into the optical disk drive (1) Correction of focus offset and tilt offset. "123904.doc