CN1242401C - Method and apparatus for detecting CD medium quality - Google Patents

Abstract

The method and apparatus for testing the quality of an optical disk medium. The optical disk is moved into a testing position (e.g. disposes the optical disk in a disk drive), and test data is recorded in the outer area of an optical disk. This outer area of the optical disk is not used when manufacturing a prerecorded disk, and is also not used by users of write-once optical disks. The quality of the optical disk is judged based on the test signal produced from reproducing the test data in the outer area of the optical disk. Based on the judged quality, the optical disk is classified for further processing.

Description

The method of recording detection data on optical recording media

This is the part continuation application of 08/989, No. 660 application of submission on Dec 12nd, 1997, and its full content is as reference of the present invention.

Technical field

The present invention relates to a kind of CD quality detecting device, relate in particular to a kind of on optical recording media the method for recording detection data, it can detect effectively to CD quality in the optical disc production process.

Background technology

The dish medium is divided into two classes, i.e. the such CD of disk and compact disk (CD).Because the storage capability of CD is very big, therefore, the demand of CD is increased sharply.CD is divided into the dish of pre-recording, as compact disk (CD), Write-once disc, as CD-R (can write down CD) with can repeat to write the dish medium, as CD-RW and DVD-RAM.

What Figure 1A and 1B illustrated is general CD.The radius L1 of these dishes is 60mm, and the diameter L2 of center pit is 15mm.What Figure 1A represented is general prerecorded optical disc.Shown in Figure 1A, the recording areas of CD comprises introduces starting point BLI, main storage portions starting point BPL and draw starting point BLO.Information is written into main storage portions starting point BPL and draws main storage portions MSA between the starting point BLO.

What Figure 1B represented is general CD-WORM, does not have recorded information in advance on this dish.Resemble the represented CD of Figure 1A, the CD that Figure 1B represents has a recording areas, and when in the recording areas recorded information, this information is recorded in main storage portions MSA.Shown in Figure 1A and 1B, the outskirt of recording areas is not used in storage information.Outskirt provides margin for error for manufacturing deficiency, because the manufacturing technology that is adopted makes the defective of recording areas very easily occur in the outskirt of recording areas.

Fig. 2 A and 2B are the synoptic diagram of expression CD-R dish structure.

At first, CD-R is coiled injection moulding, to be formed with the polycarbonate substrate of pregroove marks with stamping machine.Then, the pregroove marks polycarbonate substrate is carried out spin-coat process.

Shown in Fig. 2 A, spin-coat process can be rotated the pregroove marks polycarbonate substrate by about 3000rpm, thereby dish is applied processing, and wherein, masking liquid inwardly drops on the dish, so that utilize centrifugal force that drop is scatter.

At first use tygon and spin-coat process to form recording layer, on recording layer, form reflection horizon and protective seam successively with aluminium then.Use the UV resin on protective seam, to form an overlay, form mark layer at last, thus, obtain the CD-R dish of cross section shown in Fig. 2 B.The CD-R dish of coating protection overlays on the column and sends quality detection device to.

Shown in Fig. 2 A, when adopting spin-coat process in optical disc production, the thickness of dish has towards its neighboring the trend of attenuation gradually.Consequently, when the recording layer at dish writes down or from the recording layer playback time, because recording layer is inhomogeneous, the generation of all edge errors outward can get more and more, therefore, in general, target information only is recorded in the main storage portions that the 118mm in the whole 120mm diameter of CD constitutes.The outskirt of 118mm periphery is not used for carrying out record.

General dish quality determining method has a great difference from visible detection method to the reflectivity detection method.

Fig. 3 is the block scheme by the vision inspection apparatus of Koch company manufacturing.As shown in Figure 3, vision inspection apparatus comprises: controller 10 is used for pick-up unit is carried out total control operation; Driver 11-14 is used for carrying out in the introducing district of main storage portions the detection signal recording operation or carries out the detection signal replay operations from introducing the district; Detection signal processing unit 15 is used to analyze the characteristic of the detection signal of being reset by driver 11-14; Measuring system 16 is used for reference signal and each characteristic that is drawn by 15 analyses of detection signal processing unit are compared, and determines whether the dish quality has problem.

In this situation, be that the supposition dish is that to adopt same stamping machine to carry out injection molding, and generally adopt 4 drivers that its nuance depends on the manufacturer of measurement mechanism.

Detection signal processing unit 15 comprises the digital signal processing unit 15b-15e of a CPU (central processing unit) 15a and difference respective drivers 11-14.

Here, DSP1-DSP4 (15b-15e) is respectively applied for the playback detection signal is carried out specificity analysis.DSP-1 (15b) analyzes servosignal and focus signal, and DSP-2 (15-c) analyzes instability, and DSP3 (15d) analyzes mechanical property, and DSP4 (15e) analyzes optical characteristics.

Dish vision inspection apparatus to such formation describes now.

After the CD manufacturing is finished, the CD of sampling according to the control of controller 10 is installed on the driver 11-14 aptly, each driver 11-14 is according to the control of controller 10, introducing district or main storage portions record detection signal or from above-mentioned district's playback detection signal.

The detection signal that the corresponding reception of DSP1-DSP4 15b-15e is reset by driver 11-14, then according to the control of CPU 15a, analysis of high frequency HF, instability, servosignal, focus signal, mechanical property and optical characteristics.In this case, test index comprises optical characteristics, as birefringence, and reflectivity and transmissivity, and characteristics of signals, as every group error incidence, radially noise and instability, these indexs are used for respectively dish is assessed.

Then, reference signal and high frequency, instability, servosignal, focus signal, mechanical property and optical characteristics that measuring system 16 usefulness are stored in advance compare, and to determine the dish quality whether problem are arranged.

As mentioned above, the run-of-the-mill detection method is included in the introducing district or the main storage portions tracer signal of dish, these detection signals and detection signal compared with reference signal to determine quality reset.

But, regrettably can not all use these methods to detect to each CD that produces.For example, write CD-WORM in case detect data, this dish loses its value as commodity owing to becoming to use.Therefore, usually the CD of a plurality of manufacturings is sampled and detect according to said method.

Except that out of use problem was coiled in the generation sampling, also there was inaccurate and incredible problem in these quality determining methods.Because even the sampling dish is up-to-standard, might not mean that other dishes of not sampled also have high-quality.Therefore, there is inaccurate and incredible problem in these detections.

In addition, in general reflectivity detection method, the light that laser diode sends is divided into multi beam and is mapped on the dish.Use a plurality of photodetectors to being detected, and detect because the inhomogeneous defective that causes of the layer that (for example sputter process and spin-coat process) produced in moulding or manufacture process by the multi-beam of the reflective layer reflects of being coiled.The quantity and the size of photodetector depended in the accuracy of reflection detection defect recognition.

Therefore present existing technology, can only detect obvious defects reducing there is restriction on the size of photodetector, can not carry out meticulous detection.

CD media also will be through additional quality testing.For example, monitor the scanning of optical disc surface being carried out with laser beam by using ccd video camera, thereby the whole surface of CD is shown.With display visual inspection is carried out on this surface then.

Other detections comprise and push away/draw, cross (talk) and check and introduce starting point BLI, main storage portions starting point BPL and the position of drawing starting point BLO.

By above-mentioned detection method, can carry out mechanical property and detect, as introduce starting point BLI, main storage portions starting point BPL, draw starting point BLO, recording channel and mark starting point, detection speed, track pitch, crooked deviation, distortion deviation, disk thickness, angular displacement, vertical missing, CD radius and cd centre's bore dia.In addition, can also carry out characteristics of signals and detect, as the pushing away/draw of noise radially, focus noise, tracking signal, data carrier simulation and carrier numeral.

Summary of the invention

According to detection CD media method for quality of the present invention and device CD is delivered to detection position (for example, CD being placed on the CD drive), and at the outskirt record test data of CD.This outskirt of CD does not use when dish is pre-recorded in manufacturing, and is not also used by the user of CD-WORM.CD quality is judged according to the detection signal that the detection data of playback CD outskirt are produced.Judge according to quality, CD is classified so that further handle.

The invention provides a kind of method that is used for recording detection data on optical recording media, this optical recording media have first district that is used for detection record and be used for from from the inboard to second district of outer sidelights on user data, wherein, first district is positioned at the outskirt of optical recording media and comprises a detection zone that is used for detection record, this method comprises: will detect data recording to detection zone by light picker, wherein detecting data recording is to carry out from the inboard, lateral of optical recording media; And writing information, the detection zone that this information representation has been carried out.

Description of drawings

By following detailed description and only as the accompanying drawing of explaining usefulness, the present invention is better understood, in the accompanying drawings, same numeral is represented appropriate section in each figure.

Figure 1A and 1B represent general CD;

Fig. 2 A is about using spin-coating method to make the synoptic diagram of CD-R dish;

Partial cross section's skeleton view that the CD-R that Fig. 2 B is to use spin-coating method to make coils;

Fig. 3 is the block scheme of the vision inspection apparatus of Koch company manufacturing;

What Fig. 4 A and 4B represented is CD of the present invention;

What Fig. 5 A and 5B represented is to reset according to the present invention to detect a kind of method of data;

What Fig. 5 C and 5D represented is to reset according to the present invention to detect the another kind of method of data;

What Fig. 5 E and 5F represented is to reset according to the present invention to detect another method of data;

Fig. 6 be one according to the present invention in CD recording detection data and detect the block diagram of embodiment of the device of CD quality;

Fig. 7 be according to the present invention in CD the process flow diagram of a kind of method of recording detection data;

Fig. 8 A and 8B represent is in the time will detecting data according to the present invention and write CD, the information state of CD;

Fig. 9 is the process flow diagram that detects the method for CD quality according to the present invention;

Figure 10 A represents is the relation of the patterns of indentations signal of patterns of indentations on the CD and playback;

Figure 10 B represents the example of the simulating signal of a playback;

Figure 11 is the skeleton view that carries out another embodiment of the device that CD quality detects according to the present invention;

Figure 12 is a block diagram of representing that in detail driver is formed among Figure 11;

Figure 13 is the floor map of structure that is used for rotating the CD transfer member of Figure 11 extraction apparatus;

Figure 14 is the cross sectional representation of structure of the CD transfer member of the expression extraction apparatus that is used for vertical moving Figure 11;

Figure 15 is the cross sectional representation of sensor embodiment among Figure 11;

Figure 16 is the synoptic diagram that comprises according to the total system of another embodiment of CD quality detecting device of the present invention;

What Figure 17 represented is at the data layout of CD outskirt according to the present invention;

Figure 18 is an ASCII character system table;

What Figure 19 represented is the flow process of carrying out the method for CD quality detection according to the present invention;

Figure 20 represents is to move in the flow process shown in Figure 19 and the flow process of load step;

What Figure 21 represented is the flow process that detects the data recording step among Figure 19;

What Figure 22 represented is the flow process that detects the data playback step among Figure 19; With

What Figure 23 represented is the flow process of CD classification step among Figure 19.

Embodiment

Fig. 6 represents be a kind of according to the present invention on CD recording detection data and detect an embodiment of the device (calling " CD quality detecting device " in the following text) of CD quality.As shown in the figure, CD quality detecting device comprises a driver element 31 and an optical pickup units 32.Driver element 31 comprises a support 31-2 who is used to support the CD 31-1 that will reset, and one is used for chucking optical disk 31-1 clamper 31-3 and a spindle drive motor 31-4 who is used for rotary CD 31-1.Optical pickup units 32 comprises that one is used for to CD 31-1 writing information and reads the light picker 32-2 of information from CD 31-1.A slide motor 32-1 moves radially light picker 32-2 along CD 31-1.

Controller 36 is by the work of a servo control mechanism 37 control spindle drive motor 31-4 and slide motor 32-1, and this control is to carry out according to the signal of user's input with from the focusing error and the tracking error signal of optical pickup units 32.When a user ordered at CD 31-1 recording detection data, the detection data that controller 36 will write CD 31-1 offered optical pickup units 32, and the record of control detection data.

When user's order is carried out quality testing to CD 31-1, the detection data of controller 36 control optical pickup units 32 playback of recorded on CD 31-1.The replay signal of optical pickup units 32 outputs is provided for RF amplifier 33 and controller 36, and focusing error and tracking error signal are provided for controller 36.According to focusing error and tracking error signal and replay signal, controller 36 is by servo control mechanism 37 control slide motor 32-1 and spindle drive motor 31-4.33 pairs of replay signal from optical pickup units 32 of RF amplifier are handled and are exported the replay signal of handling and handle to carry out MPEG.Also the replay signal that will handle offers comparer 35.

The replay signal that comparer 35 will be handled compares with the tentation data that is stored in the memory 34.Comparative result is exported to controller 36, and controller 36 determines that according to comparative result the quality of CD 31-1 is, and is still bad.If controller 36 is determined the poor quality of CD 31-1, so, controller 36 is indicated CD 31-1 poor quality with regard to actuation indicator 38 to the user.

Below with reference to the work of Fig. 4 A-9 detailed description according to CD quality detecting device of the present invention.Shown in Fig. 4 A and 4B, will detect the outskirt that data STP is recorded in CD according to CD quality detecting device of the present invention; Prerecorded optical disc (Fig. 4 A) and CD-WORM (Fig. 4 B) are not always the case.Recording operation will be described in more detail in conjunction with Fig. 6-8B.

Fig. 7 represents be according to the present invention on CD the process flow diagram of the method for recording detection data.As shown in the figure, at step S10, controller 36 control optical pickup units 32 read catalogue listing TOC data from CD.Be recorded near the cd centre TOC data and indicate the position of drawing starting point of introducing starting point, main storage portions and the main storage portions of the main storage portions in the prerecorded optical disc for example.The method of recording detection data in CD only is described with regard to prerecorded optical disc for convenience of explanation, below.But those of ordinary skills are easy to just know that this method can be used for for example CD-WORM.

After the TOC data that receive from optical pickup units 32, controller 36 determines at step S20 whether the user has selected detection data recording pattern.If also do not select to detect the data recording pattern, just handle and finish.Otherwise at step S30, controller 36 determines whether the user has selected from inside to outside (in to out) logging mode.

If selected from inside to outside (in to out) logging mode at step S30, then at step S40, controller 36 is determined the current location of light picker 32-2 in any known mode, and determines the position of drawing starting point BLO of main storage portions according to the TOC data.Then, at step S50, light picker 32-2 is shifted at the position of drawing of main storage portions in the position that controller 36 is drawn starting point BLO according to current location and the determined main storage portions of the light picker 32-2 that is detected.

At step S60, controller 36 control optical pickup units 32 are with the recording detection data STP on CD 31-1 of (in to out) mode from inside to outside shown in Fig. 8 A.Detecting data can be provided by the user, also can be the tentation data by controller 36 storages.Detecting data can be predetermined patterns of indentations, and predetermined bit pattern perhaps resembles the such prearranged signal of known melody.More detailed description when the detection data are discussed below the CD quality detection.

Shown in Fig. 8 A, controller 36 control light picker 32-2 follow the tracks of CD and move to the radial outside position from the radially inner side position and come recording detection data introducing district and detection data before.In other words, controller 36 moves along the disc radial direction outward direction during recording detection data by slide motor 32-1 and servo control mechanism 37 control light picker 32-2.In addition, shown in Fig. 8 A, controller 36 control optical pickup units 32 detect the introducing district of data STP every a predetermined radial distance opening entry the draw-out area of main storage portions after, to set up a buffer zone between the introducing district of the draw-out area of main storage portions and detection data STP.

After the detection data recording was finished, at step S70, the TOC data that controller 36 upgrades in the CDs detected data and introduce the position of distinguishing with indication.

If do not select (in to out) logging mode from inside to outside at step S30, so, at step S80, controller 36 determines whether the user has selected from outside to inside (out-to-in) logging mode.If also do not select (out-to-in) logging mode from outside to inside, flow process is got back to step S30.Otherwise flow process enters step S90.At step S90, controller 36 detects the current location of light picker 32-2 in any known mode, and determines the position of recording areas end according to the TOC data.Then, at step S100, the closing position of recording areas shifted to light picker 32-2 by controller 36.

Next, at step S110, controller 36 control optical pickup units 32 are with the recording detection data in CD of mode from outside to inside shown in Fig. 8 B.Shown in Fig. 8 B, detect data STP and also radially inwardly carry out towards cd centre at recording areas closing position opening entry.Specifically, shown in Fig. 8 B, the introducing district of first recording detection data STP, recording detection data, the draw-out area of recording detection data at last then.In the draw-out area of the position recording detection data STP of the enough distances in starting point front, the draw-out area of main storage portions, so just in the draw-out area of main storage portions with detect between the draw-out area of data STP and stay next buffer zone.When recording detection data from outside to inside, controller 36 control light picker 32-2 when following the tracks of CD radially moves towards cd centre.

After step S110 recording detection data, flow process enters step S70.At step S70, the TOC data that controller 36 upgrades CD detect data and detect the introducing district of data and the position of draw-out area with indication.

Operate according to the quality testing of CD quality detecting device of the present invention in conjunction with Fig. 3 A-6 and Fig. 9 explanation now.The method that detects CD quality according to the present invention that Fig. 9 represents.As shown in Figure 9, at step S200, the TOC data of controller 36 control optical pickup units, 32 playbacks and output CD 31-1.At step S220, whether controller 36 determines user's input quality detection instruction then.If also there is not input quality to detect instruction, flow process finishes.If input quality detects instruction, then at step S230, controller 36 detects the current location of light picker 32-2 in any known mode.

Introduce the position in district and the current location of light picker 32-2 according to detection data indicated in the TOC data, in step 240, controller 36 moves on to light picker 32-2 in the introducing district of detecting data.Except that the position of indicating the introducing district of detecting data, the TOC data can also be indicated by this position data and be detected data along to from inside to outside writing down, and still radially write down from outside to inside.According to this judgement, at step S250, controller 36 control light picker 32-2 reset and detect data.

Detecting data can reset in proper order, and prerecorded optical disc shown in Fig. 5 A or the CD-WORM shown in Fig. 5 B detect data and also can reset CD-WORM shown in prerecorded optical disc and Fig. 5 D shown in Fig. 5 C by predetermined space.In addition, the part of selecting in advance of the detection data of also can resetting, the CD-WORM shown in the prerecorded optical disc shown in Fig. 5 E and Fig. 5 F.

At step S260, comparer 35 is handled and exported to the detection data of playback by RF amplifier 33.Under the control of controller 36, comparer 35 will detect data and compare with the tentation data of storing in memory 34, and controller 36 is according to the quality of relatively judging CD 31-1.Comparer 35 and controller 36 can be finished the combination of a quality testing operation or several quality testing operation.These quality determining methods comprise that patterns of indentations detects bit pattern detection and analog signal detection.

In CD and digital video disk (or digital universal disc) DVD, minimum bit pattern is 3T, and maximum bit pattern is 11T for CD, is 14T for DVD.Mark 3T, 4T etc. make up measuring of corresponding indenture length with pre-determined bit.Figure 10 A represents is relation between the signal of RF amplifier 33 outputs and the indenture of representing the detection data on the CD 31-1.Shown in Figure 10 A, for example the signal of RF amplifier 33 output becomes high state at the initial point of indenture from low state, keeps high state in the length range of indenture, becomes low state at the terminal point of indenture from high state.Place value 1 is represented in the transformation of the signal of RF amplifier 33 outputs, and the signal of RF amplifier 33 outputs keeps the some positions 0 of time span representative of high state.A 3T indenture is represented bit stream 1001.A 4T indenture longer than 3T indenture is represented bit pattern 10001.When patterns of indentations from 3T to 11T or 14T increase in proper order, 0 number also increases thereupon.

When adopting the patterns of indentations method to carry out quality testing, same patterns of indentations is as detecting data quilt record repeatedly.In a preferred embodiment, the patterns of indentations of record is the 3T patterns of indentations.Because the 3T patterns of indentations is minimum patterns of indentations, so more may detect error.

Comparer 35 compares the patterns of indentations signal of 33 outputs of the RF amplifier shown in Figure 10 A with the reference signal that is stored in the memory 34.The reference signal representative is recorded in the patterns of indentations on the CD.Each part corresponding to the patterns of indentations signal of recognition data is represented 1 indenture, and this indenture and reference signal are complementary.For example, when adopting the 3T patterns of indentations, each identification indenture is represented 4 recognition data.Comparer 35 determines that identification detects the total amount of data, and then, the total amount that identification is detected data compares with the predetermined recognition data threshold value that is stored in memory 34.Memory 34 has stored corresponding to the recognition data threshold value of each playback method shown in Fig. 5 A-5F (be continuous, cycle with the part of selecting).Therefore, according to the type of resetting (continuous, the cycle and selectively part), select and use different recognition data threshold values by comparer 35.Comparer 35 is to controller 36 output comparative results.

If the amount of recognition data is greater than the recognition data threshold value, at step S260, controller 36 determines that CD quality are for well.Otherwise at step S260, controller 36 determines that CD quality is for poor.

Replace or remove patterns of indentations detects, the bit pattern detection can be judged the quality of CD 31-1.In the combine detection on the throne, the patterns of indentations signal is converted into bit stream.That is, each indenture is converted to the position of representative.Comparer 35 compares bit pattern that obtains and the bit pattern benchmark form that is stored in the memory 34.Detect differently with patterns of indentations, bit pattern detects not to be needed identical patterns of indentations as detecting data record repeatedly in CD 31-1.Any predetermined indenture is arranged and can be recorded among the CD 31-1 as detecting data.The benchmark bit pattern that is stored in the memory 34 is corresponding with the patterns of indentations in being recorded in CD 31-1.

Comparer 35 will compare from bit pattern and the benchmark hyte that the patterns of indentations signal obtains with unifying an indenture of indenture.In other words, will with a corresponding every group of position of indenture and benchmark bit pattern in corresponding group the position compare.If there is coupling, then match bit is used as recognition data and treats.Comparer 35 adds the total amount of recognition data, and total identification amount of data is compared with the predetermined recognition data threshold value that is stored in the memory 34.Comparative result is exported to controller 36.As the situation that patterns of indentations detects, memory 34 stores corresponding to continuous, the recognition data threshold value of the replay mode partly cycle and selectable.Therefore, the recognition data threshold value depends on replay mode (continuous, that be interrupted or part).

If the recognition data total amount surpasses the recognition data threshold value, then controller 36 determines that CD 31-1 quality are for well; Otherwise then controller 36 determines that CD 31-1 quality is for poor.

Replace or remove that patterns of indentations detects and the bit pattern detection, analog signal detection also can be determined the quality of CD 31-1.In this analog signal detection, carry out D/A switch to obtain the simulating signal shown in Figure 10 B by comparer 35 from the bit pattern that the patterns of indentations signal obtains.Then, 35 pairs of simulating signals of comparer or carry out amplitude and frequency detecting, or carry out one of them detection.In amplitude detected, comparer 35 was with the amplitude of simulating signal and as A among Figure 10 B _THWith-A _THIndicated amplitude thresholds scope compares.

In frequency detecting, comparer 35 zero crossing that the t1 shown in Figure 10 B and t2 is such with and the corresponding schedule time threshold range of each zero crossing compare.More particularly, owing to the detection data that are recorded on the CD 31-1 are scheduled to, so resulting simulating signal also is known; Therefore, zero crossing is known.The margin of error factor of rule of thumb determining about these zero crossings is decomposed, obtain time threshold scope about each zero crossing of playback simulating signal.Then, will store in the memory 34 about the time threshold scope of each zero crossing.

Certainly, the same with the situation of other detection methods, replay mode (continuous, the cycle or selectable part) is depended in the use of the time threshold scope of storage.

According to amplitude detect, frequency detecting, or can judge the quality of CD 31-1 according to amplitude and frequency detecting.If the amplitude of simulating signal surpasses the amplitude thresholds scope, then controller 36 determines that CD 31-1 quality is for poor.And if the zero crossing of simulating signal is fallen beyond the corresponding time threshold, then controller 36 determines that CD 31-1 quality is for poor.If controller 36 is not made ropy judgement according to amplitude detection, frequency detecting or amplitude and frequency detecting, so, the quality that controller 36 is just determined CD 31-1 is for well.

Next, at step S270, if controller 36 judges that CD 31-1 is of poor quality, then flow process enters step S280, and controller 36 actuation indicator 38 and flow process end.In this case, send the alarm that the CD that is detected is ropy CD to the user.If judge that at step S270 CD quality is good, then flow process finishes.

As mentioned above, patterns of indentations detection, bit pattern detection, amplitude detect and frequency detecting can be used alone or in conjunction with each other to determine the quality of CD.

And, except above-mentioned quality testing, can also carry out other mechanical detection and signal quality detection to CD.For example, optical disc surface is scanned the whole surface that shows CD by using ccd video camera to monitor with laser beam.Then, with display vision-based detection is carried out on the surface.

Other detections comprise push away/draw, position that cross (talk) and detection are introduced starting point BLI, main storage portions starting point BPL and drawn starting point BLO.

Can carry out mechanical property by above-mentioned detection processing detects, as introduce starting point BLI, main storage portions starting point BPL, draw starting point BLO, the diameter of recording channel and mark starting point, detection speed, track pitch, crooked deviation, distortion deviation, disk thickness, angular displacement, vertical missing, CD radius and cd center hole.

Figure 11 is the skeleton view according to another embodiment of quality detection device of the present invention, wherein is provided with driver installation unit 120, dish transfer member 121 and first to the 3rd column 122-124.

Driver installation unit 120 comprises a controller 120a, be used to carry out control operation and quality decision operation, also comprise a plurality of driver a-h, be used in the outskirt record standard trace routine (STP) of CD or from CD outskirt playback standard detection program (STP).Controller 120a can be arranged on the outside of driver a-h, and driver a-d and driver e-h are positioned opposite to each other.An indicator 120b links to each other with controller 120a arbitrarily, and can become the part of driver a-h rather than be positioned at the driver outside.

The extraction apparatus 121b that dish transfer member 121 comprises that a circular shaft 121a who is rotated by motor M1 (seeing Figure 13) and one are installed in that circular shaft 121a goes up and can move up and down along circular shaft 121a.One is used to detect with coiling the feeler 121-8 (seeing Figure 13 and 14) that contacts and is arranged on the bottom of extraction apparatus 121b, and extraction apparatus 121b has at least one suction port that is used for the extraction dish (seeing Figure 15).Extraction apparatus 121b also comprises a control punch 121c.First to the 3rd column 122-124 is equidistant to be provided with around circular shaft 121a, thus when extraction apparatus 121b vertically downward when first to the 3rd column 122-124 moves, first to the 3rd column 122-124 passes control punch 121c.

Have many dishes to overlay on first column 122, the dish that has many quality to be defined as " good " overlays on second column 123, and the dish that has many quality to be defined as " poor " overlays on the 3rd column 124.Dish on first column 122 has had protective seam through handling.One first column 122 should be provided at least, on each column, can stack nearly 150-200 and open dish.

As shown in figure 12, a plurality of driver a-h comprise respectively: a spindle drive motor 130 is used to rotate the CD that is installed on the plate rail; A light picker 131 is used for resetting at the outskirt recording detection data STP of CD or from the outskirt of CD and detects data; A slide motor 132 is used for moving light picker 131 along swing (wobbled) pregroove marks; A loading motor 133 is used to carry out the loading operation of system; A Servocontrol device 134 is used to control spindle drive motor 130, slide motor 132 and loading motor 133; A write operation control logic circuit 135 is used for receiving detection data STP and output drive signal from peripheral control unit 120a; A laser diode drive 136 is used to respond the laser diode (not shown) from the drive light picker 131 of write operation control logic circuit 135; A RF amplifier 137 is used to amplify the signal of being reset by light picker 131; A digital signal processor (DSP) 138 is used for the output signal and the correction error of demodulation RF amplifier 137; A microprocessor 139 is used for that the playback from digital signal processor 138 is detected data and outputs to peripheral control unit 120a; An interface 140 is used for the input data are encoded or deciphered and carry out data transmission between driver a-h and peripheral control unit 120a or between peripheral unit; With a buffer storage 141, be used for the data that temporary transient storage inputs to interface 140 or exports from interface 140.As further shown in FIG., each of driver a-h comprises the indicator 120b that links to each other with microprocessor 139 alternatively.

In the CD manufacture process, the CD that coating thereon forms protective seam is overlayed on first column 122.When the operator carries out quality testing by the order of user's interface (not shown), dish transfer member 121 is according to the control that is arranged on the controller 120a on the driver installation unit 120, extracts one and overlays the CD on first column 122 and be placed among a plurality of driver a-h of driver installation unit 120 one.

Describe the operation of extraction and moving CD now in detail in conjunction with the structure of CD transfer member 12.

As mentioned above, in case quality testing is carried out in operator's order, the control according to controller 120a of circular shaft 121a of dish transfer member 121 is rotated, and stops operating when corresponding with the center of first column 122 at the center of the control punch 121c of extraction apparatus 121b (seeing Figure 13).That is, extraction apparatus 121b is controlled by the rotation of circular shaft 121a about the angle of rotation of first column 122.

Figure 13 represents is an embodiment who is used to rotate dish transfer member 121 structures of extraction apparatus 121b.As shown in the figure, the central shaft 121-1 of circular shaft 121a links to each other with driving motor M1 by transmission gear 121-2.The rotating force of driving motor M1 is passed to central shaft 121-1, and the angle of rotation of extraction apparatus 121b is subjected to the control that circular shaft 121a rotates thus.Circular shaft 121a is by the central shaft 121-1 swivel bearing on the substrate support.

Realize control by the revolution of controlling and driving motor M1, according to the revolution of the output signal controlling and driving motor M1 of the such revolution speed detecting device (not shown) of image encoder to the angle of rotation of circular shaft 121.By the angle of rotation of circular shaft 121a control extraction apparatus 121b, so that extraction apparatus 121b is positioned at the top of one of first to the 3rd column 122-124.

As another preferred embodiment of the structure that the dish transfer member 121 that rotatablely moves is provided, the driving force of driving motor M1 is directly passed to neighboring or the central shaft 121-1 of circular shaft 121a, driving motor M1 connects with driving-belt.

After having finished the position control of extraction apparatus 121b about first column 122, extraction apparatus 121b moves down according to the control of controller 120a, thereby makes first column 122 pass control punch 121c, makes extraction apparatus 121b near CD.When extraction apparatus 121b to moving down when contacting with CD, contacting between the feeler (not shown) Detection and Extraction device 121b of extraction apparatus 121b bottom and CD, and detected value is exported to controller 120a.

Figure 14 represents is two preferred embodiments of structure that are used for the CD transfer member 121 of vertical moving extraction apparatus 121b.As shown in the figure, the worm gear 121-3 that rotates under the control of motor M2 is arranged on the inside of circular shaft 121a, in tooth moulding of side formation of an arm 121-4 who links to each other with extraction apparatus 121b.The tooth moulding of arm 121-4 is meshed with tooth moulding on being formed on worm gear 121-3 periphery.

As another preferred embodiment of the structure of the dish transfer member 121 that is used for vertical moving extraction apparatus 121b, pick-up 121 is arranged on the tooth bar, and a transmission gear that is used to drive tooth bar links to each other with motor.Rotatablely moving of transmission gear makes the tooth bar vertical moving, thus vertical moving extraction apparatus 121b.

Select as another kind, the formation that is used for the dish transfer member 121 of vertical moving extraction apparatus 121b comprises an annular driving band that is arranged on circular shaft 121a inner upper end and lower end.Extraction apparatus 121b is arranged on the middle part of endless belt, and the rotating force of motor passes to the drive pulley of endless belt, makes extraction apparatus 121b vertical moving thus.

Figure 15 is the schematic cross-section of extraction apparatus 121b.As shown in the figure, suction port 121-5 is formed on the lower surface of extraction apparatus 121b, and suction port 121-5 links to each other with vacuum pump P by duct member 121-6.

When extraction apparatus 121b contacts with CD, controller 120a response drives vacuum pump P from the transducing signal of feeler (not shown), when vacuum pump P was driven, the suction port 121-5 that links to each other with duct member 121-6 produced suction, and object optical disc is drawn onto on the extraction apparatus 121b thus.

After CD was extracted device 121b and holds, extraction apparatus 121b shifted to a plurality of driver a-h according to above-mentioned vertical moving mode.Here in order to make extraction apparatus 121b shift to driver a-d, extraction apparatus 121b turn left a predetermined angular, vertical moving then.In order to shift to driver e-h, extraction apparatus 121b turn right a predetermined angular, vertical moving then.When making extraction apparatus 121b vertically shift to destination drive among the driver a-h, driver a-h opens separately plate rail according to the control of controller 120a.

At this moment, controller 120a quits work vacuum pump P, eliminates the suction to extraction apparatus 121b, and extraction apparatus 121b is placed on CD on the plate rail of the driver a-h below it.

Another kind of mode is to rotate after the extraction apparatus 121b vertical moving again, and dish is placed on the disk drive a-h.In this mode, the plate rail of disk drive a-h is opened prior to the transmission of dish.

After on one that CD is placed among the driver a-h, driver a-h resets at the outskirt recording detection data STP of CD or from the CD outskirt respectively and detects data STP under the control of controller 120a.Controller 120a compares replay data to determine the dish quality with reference data.Controller 120a or microprocessor 139 are realized the comparer 35 among Fig. 6 and the function of controller 36 under controller 120a control.And the function of memory 141 or memory (not shown) that links to each other with controller 120a and the memory 34 among Fig. 6 is identical.That is, be achieved in conjunction with the described dish quality determining method of Fig. 4 A-10B above controller 120a makes, thereby determine that the quality of coiling is, still bad.Therefore, just do not repeat explanation here to this method.

CD quality is in case determine that CD transfer member 121 picks up the CD that is contained among the driver a-h under the control of controller 120a.Determine that quality is that the CD of " good " overlays on second column 123, determine that quality is that the CD of " bad " overlays on the 3rd column 124.

At last, quality is determined it is that the CD of " good " annotate to be gone up mark, thereby finish the CD manufacturing, and quality is determined it is that the CD of " bad " is discarded.For the CD of all manufacturings, these steps are all carried out automatically.

Figure 16 is the diagrammatic sketch according to another embodiment of CD quality detecting device of the present invention.As shown in the figure, the CD quality detecting device of second embodiment links to each other with outer computer 126 by SCSI bus.In this 3rd embodiment, the controller 120a transmission of computing machine 126 in being arranged on quality detection device detects data STP.Computing machine 126 can also receive the detection data STP that resets by SCSI bus alternatively, thereby determines CD quality.In this embodiment, be that computing machine 126 is determined quality, rather than controller 120a determine quality.But computing machine 126 can adopt the method identical with said method to determine that CD quality is, and is still bad.

Can the use a computer operation of 126 control of quality pick-up units of an operator.Therefore, can select to be arranged on the quality that microprocessor 139 in the quality detection device and/or controller 120a carry out CD and determine operation, also can select outer computer 126 to carry out CD quality and determine operation.

Before this replacement method is discussed, go through the information state of the CD shown in Fig. 8 A in conjunction with Figure 17, wherein the introducing district shown in Fig. 8 A constitutes the buffer zone 150 of Figure 17 or the part in STP district 151.For ease of discussing, CD shown in Figure 17 is 74 minutes CD-R dishes.

According to the method, the detection data STP recording areas that is used to detect CD quality is the outskirt of video disc recording layer, and this outskirt generally is positioned at the outside of the 118mm diameter of whole 120mm diameter.In general 74 minutes CD-R coiled, finished at the ATIP (absolute time in pregroove marks) of 75:30:00 (75 minutes, 30 seconds and 00 data block) draw-out area.Therefore, as shown in table 1, the ATIP that the outskirt scope finishes from the draw-out area is that the 118mm (φ 118) of 75:30:00 is the 118:1763mm (φ 118.1763) of 75:47:00 to ATIP.In this method, ATIP is used for representing the position of light picker 131 on CD.

	Prior art	The present invention
			Whole storage portions	Max.φ118	Max.φ118.1763
Absolute time	75:30:00	75:47:00

And outskirt comprises first and second buffer zones 150,152 that are separately positioned on 151 front and backs, STP district.Total road number of outskirt is about 55 roads, and the light picker 131 in the double-speed drive will be with following the tracks of this 55 road in nearly 12 seconds.

First buffer zone 150 is the surplus districts in about 6.5 roads, allows light picker 131 accurately to locate in STP district 151 when move the neighboring from inside circumference at it.That is, the surplus district finishes at 75:32:00ATIP and φ 118.0208 diameter places.

STP district 151 comprises 32.4 roads that are used for recording detection data STP, and terminates in 75:42:00ATIP and φ 118.0208 diameters.But the road number is not fixed in the STP district, but depends on the capacity of the employed equipment of operator.When light picker 131 is when being used for four double-speed drives, follow the tracks of STP district 151 and will use 6-7 second.At this moment, because number decision in road detects the quantity of data STP, so the road number is many more, it is accurate more that CD quality detects.

For making light picker 131 location in STP district 151 exactly, second buffer zone 152 is the surplus districts in about 16.2 roads.Second buffer zone 152 terminates in 75:47:00ATIP and φ 118.1763 diameters.

As shown in figure 18, the detection data STP that adopts in this method of the present invention changes between 0-1155 decimal number (as all ASCII character, audio data and remainder certificate).Between these decimal numbers, this method is preferably and adopts selected ASCII character (being more preferably ASCII character 242), selected ASCII character to carry out binary translation and EFM conversion in proper order to carry out record.

In above-mentioned shift step, detect data STP and be transformed into the various indentures that size changes between from 3T to 11T.As previously described, because the 3T patterns of indentations is minimum patterns of indentations, the easier detection of error.When detection data STP was carried out the EFM conversion, ASCII character 242 relative other sign indicating numbers comprised many 3T pulses, make in the easier detection error of playback duration.Therefore, the present invention is more preferably and adopts ASCII character 242 as detecting data STP.

Carry out the operation that recording/reproducing and CD quality are determined according to the method for this replacement now in conjunction with second embodiment explanation of the flow process of Figure 19-23 and CD quality detecting device shown in Figure 11.

Figure 19 represents is flow process according to another kind of CD quality detection method of the present invention.As shown in the figure, at step S300, the CD that forms protective seam thereon on first column 122 is sent to the driver a-h one.Figure 20 understands the flow process of step S300 in more detail.

As shown in figure 20, at step S301, have protective seam on it but preferably be not that the CD of coating is overlayed on first column 122.Step S301 can finish near process equipment alternatively, and at this moment first column 122 is not arranged on the dish installation unit 120.Therefore, at step S303, with first column, 122 dislocations and be arranged on the dish installation unit 120 on.But at step S301, dish can overlay to be arranged on and coil on first column of laying on the unit 120 122, like this, and with regard to cancellation step S303.Then, at step S305, open plate rail for one among the controller 120a Control Driver a-h, and at step S307, console panel transfer member 121 usefulness extraction apparatus 121b pick up dish on first column 122 in mode noted earlier.

Next, at step S309, dish transfer member 121 will move on the plate rail that step S305 opens at the CD that step S307 picks up.Then, at step S311, the suction of cancellation absorption dish is placed on dish on the plate rail of opening.Then, close the plate rail of opening at step S313.Another kind of way is, according to S307, and S309, order performing step S305, S307, S309 and the S311 of S305 and S311.

Get back to Figure 19, this method continues by recording detection data STP on the CD among the driver a-h that packs in step S300.Figure 21 represents the step S320 of recording detection data STP in more detail.

As shown in figure 21, at step S321, controller 120a indication microprocessor 139 control Servocontrol devices 134 move to focus with light picker 131, and light picker 131 are moved to the innermost periphery of CD.After light picker 131 arrived innermost periphery, this state obtained confirming by contacting with the limit switch (not shown).That is, as shown in the figure, at step S323, microprocessor 139 determines whether limit switch is opened.If limit switch is not opened, microprocessor 139 continues output order light picker 131 is shifted to the innermost periphery of CD.But, in case detecting limit switch, opens by microprocessor 139, then at step S325, microprocessor 139 begins the outskirt of light picker 131 to CD moved according to the instruction that slave controller 120a receives.Say that more specifically microprocessor 139 moves to ATIP75:32:00 with light picker 131.

At step S325, as shown in figure 17, optical sensor has been positioned at the starting point in STP district 151, and at step S327, microprocessor 139 control detection data STP are recorded in the STP district 151 of CD.That is, in a preferred embodiment, ASCII character 242 duplicatedly records in the STP district 151 of CD.

During recording detection data STP, detect ATIP, and, determine whether ATIP surpasses 75:42:00 at step S329.If ATIP does not surpass 75L:42:00, then continue recording detection data STP.But,, then stop recording detection data STP if ATIP surpasses 75:42:00.

Get back to Figure 19, at step S340, the detection data STP of playback of recorded, at step S360, the detection data STP according to resetting determines CD quality.Figure 22 illustrates in greater detail step S340 and S360.

As shown in figure 22, at step S341, microprocessor 139 moves to ATIP75:32:00 with optical sensor.Then, at step S343, reset and detect data STP.Specifically, the detection data STP of playback is amplified by radio-frequency amplifier 137, and separates the mediation correction error in DSP 138.Then, by interface 140 the detection data STP of this processing is transferred to controller 120a.

In this playback procedure, detect ATIP, and, determine whether ATIP equals 75:42:00 at step S345.If ATIP is not equal to 75:42:00, then continuing resets detects data STP.But in case ATIP equals 75:42:00, detection data STP stops to reset.

Then, flow process enters step S361, and controller 120a judges the quality of CD according to the detection data STP that resets.Except that controller 120a, this quality is judged and can also be realized by microprocessor 139 or computing machine 126.This quality determining step is realized in the mode identical with step S260 among above-mentioned Fig. 9, therefore, is not repeated the explanation to this step.

In case the judgement quality, at step S363, controller 120a determines whether CD is judged as the poor quality.If, determine that CD is a bad CD at step S369.But if judge that CD quality is not poor, then at step S365, controller 120a has been categorized as CD with CD.Next, at step S367, controller 120a shows the determined quality of CD at indicator 120b.

Got back to figure 9, after carrying out step S360, the CD that detected has been classified at step S380.Figure 23 illustrates in greater detail step S380.As shown in figure 23, at step S381, whether controller 120a identification CD has been confirmed as CD.If good CD, then controller 120a makes the driver of depositing CD open its plate rail in step S383 Control Driver.Next, at step S385, the CD that controller 120a console panel transfer member 121 picks up on the plate rail of opening, and on step S387 moves on to CD on second column 123.At step S389, the suction that controller 120a console panel transfer member 121 is eliminated CD is so that CD overlays on second column 123.Then, process enters step S399.

At step S381, if CD has not been identified as CD, then at step S391, the driver a-h that CD is deposited in controller 120a control opens plate rail, and picks up CD at step S393 console panel transfer member 121.Then, at step S395, controller 120a console panel transfer member 121 places CD above the 3rd column 124.At step S397, the suction that controller 120a control CD transfer member 121 is eliminated on the CD is so that CD overlays on the 3rd column 124.Flow process enters step S399.

At step S399, controller 120a console panel transfer member 121 is got back to first column 122.At this moment, determine whether any dish is arranged at first column 122.That is, at step S399, controller 120a moves extraction apparatus 121b vertically downward on first column 122.If before feeler 121c triggers, extraction apparatus 121b arrives the minimum vertical position, and then controller 120a determines that on first column 122 do not have CD.Otherwise controller 120a determines on first column 122 CD is arranged.If on first column 122 CD is arranged, then at step S403, flow process is got back to the step S305 of Figure 20.But if do not have CD on first column 122, then at step S405, flow process is got back to step S301.

Other above-mentioned restrictions are not limited to the second embodiment of the present invention.On the contrary, a those of ordinary skill in the art readily appreciates that the 3rd embodiment also can adopt this method.

Be used to detect the method and apparatus of CD quality from the outskirt record of CD and the detection data of resetting according to of the present invention.Does not use in prerecorded optical disc or CD-WORM in this zone.Therefore, the CD of each manufacturing can carry out quality testing and CD can not be used as commodity according to the present invention.Consequently, it is more accurate and more reliable to detect quality according to the present invention.That is, every CD can both detect quality, still, optionally has only the sampling CD to detect.

Detect to be not limited to handle according to CD quality of the present invention and reach the dish that is formed with the protective seam stage on it, but also be applicable to reach and be formed with recording layer, the reflection horizon or the dish in mark layer stage.And the present invention allows to carry out quality testing after general sampling Detection or vision-based detection.

As mentioned above, the present invention can combine inventory quality testing and dish manufacture process.

In addition, in the present invention, can detect data STP at CD outskirt recording detection data STP or from the playback of CD outskirt, reduce the manufacturing cost of Write-once disc thus in the very short time.

The present invention of Miao Shuing like this can change with many modes obviously.It is to have left the spirit and scope of the invention that such change can not be considered as, and all will fall into the scope of appended claim like this to the conspicuous change of those of ordinary skills.

Claims (6)

1. method that is used for recording detection data on optical recording media,

Described optical recording media have first district that is used for detection record and

Be used for from the inboard to second district of outer sidelights on user data,

Wherein, first district is positioned at the outskirt of optical recording media and comprises a detection zone that is used for detection record, and this method comprises:

To detect data recording to detection zone by light picker, wherein detecting data recording is to carry out from the inboard, lateral of optical recording media; With

Writing information, the detection zone that this information representation has been carried out.

2. the method for claim 1 comprises further described optical recording media is arranged on the data record position that this is provided with step and comprises:

A column is placed on the delivery unit;

Optical recording media is loaded on the said column; And

By said delivery unit optical recording media is sent to a data record position from said column, thereby optical recording media is arranged on the said data recording position.

3. the method for claim 1 further may further comprise the steps and makes light picker be positioned the outskirt of said optical recording media:

Detect the pairing absolute time in pregroove marks in position of said light picker;

Determine whether said detected absolute time in pregroove marks equals a predetermined absolute time in pregroove marks;

If said determining step shows said detected absolute time in pregroove marks and is not equal to the said predetermined absolute time in pregroove marks, then said light picker is shifted to the said predetermined absolute time in pregroove marks.

4. the method for claim 1 further comprises:

In the first predetermined absolute time in pregroove marks, the said detection data of opening entry;

Detect the pairing absolute time in pregroove marks in position of said light picker;

Determine whether said detected absolute time in pregroove marks equals the second predetermined absolute time in pregroove marks; With

When said determining step shows that said detected absolute time in pregroove marks equals said second absolute time in pregroove marks of being scheduled to, stop the record of said detection data.

5. the process of claim 1 wherein that said detection data comprise ASCII character, at least one in audio data and the remainder certificate.

6. the method for claim 5, wherein said detection data are ASCII character 242.

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