CN1203474C - Optical pickup and optical recording/reproducing apparatus using the same - Google Patents
Optical pickup and optical recording/reproducing apparatus using the same Download PDFInfo
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- CN1203474C CN1203474C CNB001046934A CN00104693A CN1203474C CN 1203474 C CN1203474 C CN 1203474C CN B001046934 A CNB001046934 A CN B001046934A CN 00104693 A CN00104693 A CN 00104693A CN 1203474 C CN1203474 C CN 1203474C
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- 230000003287 optical effect Effects 0.000 title claims abstract description 119
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- 238000001514 detection method Methods 0.000 abstract description 13
- 238000010586 diagram Methods 0.000 description 10
- 238000000034 method Methods 0.000 description 5
- 239000000975 dye Substances 0.000 description 4
- 239000004065 semiconductor Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 3
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/13—Optical detectors therefor
- G11B7/131—Arrangement of detectors in a multiple array
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
- G11B7/1353—Diffractive elements, e.g. holograms or gratings
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
- G11B7/1372—Lenses
- G11B7/1374—Objective lenses
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
- G11B7/1395—Beam splitters or combiners
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/2403—Layers; Shape, structure or physical properties thereof
- G11B7/24047—Substrates
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Abstract
An optical pickup includes a plurality of light sources emitting light beams of different wavelengths; a photodetector having a plurality of light detection patterns formed on a single substrate, each light detection pattern for detecting return light generated by reflection of light emitted from each of a plurality of light sources on each of the recording media; and an optical system that uses in common an optical path that extends from the plurality of light sources to the photodetector. The optical recording/reproducing apparatus includes an optical pickup. An optical pickup and an optical recording/reproducing apparatus are capable of writing or reading signals on different types of optical recording media with high quality. A small-sized optical pickup can be designed, and thus an optical recording/reproducing apparatus using the optical pickup can be designed to be small.
Description
Technical field
Optical recording/the reproducing device that the present invention relates to light picker and use this light picker specifically, is the optical recording/reproducing device about being suitable for handling the light picker of dissimilar optical recording medias and using this light picker.
Background technology
Because the innovation of optical recording technology has recently obtained high record density and big recording capacity.For example mini disk (CD) pits size is about 0.83 μ m.Yet, exploitation recently can commercial Digital Television or multi-purpose disk (DVD) in the dimple size taked only be about 0.4 μ m.It is 1.6 μ m that CD uses the optical track spacing, and DVD to take the optical track spacing be 0.74 μ m.Be the dimple size of DVD and half that the optical track spacing is less than CD.The recording density of optical recording and playback depends on the diameter of luminous point, described luminous point is the object lens that light focuses on the recording medium to be focused on the recording medium by being used for, and the spot diameter of focusing depends on employed optical source wavelength and numerical aperture of objective (NA).In other words, the big NA of shorter optical source wavelength and object lens can obtain less focal spot diameter, therefore can reach than high record density and big recording capacity.
Organic dyestuff (organic dye) recording materials only be used to constitute CD-R (can write down CD) are used in plan, with only reach the light source that is approximately 785nm with wavelength just can obtain being equivalent to the CD reflectivity greater than 70% reflectivity.Therefore, use the light picker of the light source of single wavelength 785nm not write or sense data from the CD sense data with at CD-R.Yet, common light picker uses object lens and all such light sources of semiconductor laser with optimal wavelength that if can be provided for specific light recording medium with optimum N A, therefore, light picker is difficult to read or writing information on the optical recording media that differs from one another aspect recording density and the organic dyestuff recording materials.
For example, DVD requires to provide and has 635 or the light source of 650nm wavelength light.This light source can be used for forming the focal spot as on the CD-R recording layer.Yet recording layer can not reflect the light of this wavelength with enough reflectivity, and in other words, sufficient intensity writes on recording layer or the reflected light of sense data thereby be difficult to obtain to have.In other words, the light picker of the dissimilar optical recording medias of plan processing needs a plurality of emissions to be suitable for the light source of each optical recording media wavelength light.
And, for the correct reflected light that detects each optical recording media that comfortable recording density and recording method aspect differ from one another, in light picker, equipped photodetector with the light test pattern that conforms to each optical recording media.
In addition, being used for a plurality of light sources of each the light test pattern of optical recording media and emission different wave length light beam should be mutually with hi-Fix.Need the optical pickup that satisfies these requirements.Also have, need the optical recording/reproducing device that uses this optical pickup, the design of miniaturization promptly will be arranged and reach and on every kind of optical recording media, to write in high quality and read output signal.
Summary of the invention
Therefore, the present invention seeks to be adapted to write in high quality on each dissimilar optical recording medias optical pickup with read output signal, overcome the shortcoming of above-mentioned prior art by equipment.
Another object of the present invention is optical recording/reproducing device that equipment comprises above-mentioned light picker.
According to the present invention, a kind of light picker is provided, it comprises:
Two light sources, the emission light beams of different wavelengths, two light sources are separated from one another, make from the light beam of light emitted superimposed not exclusively each other on optical axis;
Photodetector has two light test pattern that are formed on the single substrate, and each light test pattern all is used to detect from each optical recording media and reflects the back light that is produced, and describedly only launches from each of two light sources; With
Optical system, the common light path that is extended to photodetector from two light sources of using.
According to the present invention, a kind of optical recording/reproducing device is provided, it comprises:
A light picker, form by following part:
Two light sources, the emission light beams of different wavelengths, two light sources are separated from one another, make from the light beam of light emitted superimposed not exclusively each other on optical axis;
Photodetector has two light test pattern that are formed on the single substrate, and each light test pattern all is used to detect from each optical recording media and reflects the back light that is produced, and describedly only launches from each of two light sources; With
Each optical system, the common light path that is extended to photodetector from two light sources of using; And also comprise:
Drive unit is used for driving at least the object lens as an optical system part on the tracking direction of optical recording media, for example this drive unit is rear portion motor or similar equipment.
In the most preferred embodiment of light picker and optical recording/reproducing device, two light sources that are provided at the light beam that the wavelength aspect differs from one another are set on the substrate.
Because two light sources are arranged on the substrate, so the small light detecting device can be provided, wherein make a plurality of smooth test pattern mutually positioning with high precision.Use the small light detecting device to allow to provide the optical pickup that to handle dissimilar optical recording medias.Therefore, in the optical recording/reproducing device that uses light picker, the back light that produces by reflection from the light of each light emitted of the different light beams of emission wavelength, highly precisely be directed into the light test pattern, on each of dissimilar optical recording medias, write and sense data so that can be in high quality.In addition, because the miniaturization of light picker design also can be made small design to optical recording/reproducing device.
Purpose of the present invention, feature and advantage are by hereinafter becoming clearer with reference to accompanying drawing to the description of most preferred embodiment.
Description of drawings
Fig. 1 is the synoptic diagram of the light picker of the present invention the 1st embodiment;
Fig. 2 is when light picker is read CD, from the arrow A direction of Fig. 1, is used for the photodetector planimetric map of Fig. 1 light picker;
Fig. 3 is when light picker is read DVD-ROM, the photodetector planimetric map of seeing from the arrow A direction of Fig. 1;
Fig. 4 is the synoptic diagram that the light picker of the present invention the 1st embodiment changes;
Fig. 5 is the arrow B direction from Fig. 4, is used for the photodetector planimetric map of the light picker of Fig. 4;
Fig. 6 is the synoptic diagram of another variation of light picker of the present invention the 1st embodiment;
Fig. 7 is the synoptic diagram of the light picker of the present invention the 2nd embodiment;
Fig. 8 is to use the present invention the 1st or the 2nd embodiment, the schematic block diagram of optical recording/reproducing device of the 3rd embodiment according to the present invention.
Embodiment
The present invention is suitable for light picker and uses the optical recording/reproducing device of this pick-up, and it can handle the various combination of the optical recording media that comprises following various CDs: read-only optical disc such as CD, DVD-ROM etc.; Have the recording layer that forms with the organic dyestuff recording materials and on this layer, can write recordable disc such as CD-R, DVD-R etc. with sense data; But have recording layer made from phase-change material and rewriting type optical disk such as CD-RW, the DVD-RAM etc. that can write, read and wipe thereon; And magneto-optic disk.Be noted that related light picker and optical recording/reproducing device comprise the light picker and the optical recording/reproducing device that only read or write or read not only but also do to write that is suitable for relevant optical recording media here.The wherein just relevant light picker of handling two kinds of dissimilar optical recording medias elaborates to embodiments of the invention.
The 1st embodiment
Referring now to accompanying drawing 1, this figure is the synoptic diagram of the light picker of the 1st embodiment according to the present invention, and described light picker is suitable for handling two kinds of non-optical recording medias of the same type that differ from one another aspect recording density, as CD and DVD-ROM.As shown in the figure, light picker comprises light source 1.Light source 1 has the 1st light source 1a, for for example CD emission has light and the 2nd light source 1b that wavelength is 785nm, for for example DVD-ROM emission has the light that wavelength is 655nm.Be arranged on the substrate with predetermined gap between the 1st and the 2nd light source 1a and the 1b, and be packaged together.Fig. 2 is the arrow A from Fig. 1, is incorporated in the schematic plan view of the photodetector 6 in the light picker.As shown in the figure, photodetector 6 is included as the 1st smooth test pattern 6a of CD and is the 2nd smooth test pattern 6b of DVD-ROM.Be formed on the substrate with predetermined gap between the 1st and the 2nd smooth test pattern 6a, the 6b, and be packaged together.
At first, narration utilizes this light picker to read CD:
For from the CD reading information, be divided into 3 bundles (zero level, positive one-level and negative one-level) that different directions transmits from the diffracted grid 2 of the light of the 1st light source 1a.These light beams incide on the beam separator 3 that forms with transparent parallel flat.Incide on the collimator lens 4 by the zero level of beam separator 3 reflections, positive one-level and negative one-level light beam, and collimated like this device lens 4 collimations make it parallel to each other.Independently assembled by object lens 5 by the zero level of collimator lens 4 transmission, positive one-level and negative one-level light beam, to form 3 luminous points on the CD information recording surface in the present embodiment.The back light that every bundle reflection produces zero level from the CD information recording surface, positive one-level and the negative one-level light beam transmits by object lens 5, collimator lens 4 and beam separator 3 again, and then, the 1st light that incides photodetector 6 detects on Fig. 6 a.As shown in Figure 2, the 1st smooth test pattern 6a has cubic lattice light test pattern A1, B1, C1 and D1, and it detects the back light that is produced by the zero level reflection of light that reflects on the CD information recording surface.According to the result of calculation detection of focus error signal of [(IA1+IC1)-(IB1+ID1)], wherein IA1, IB1, IC1 and ID1 are the signals of exporting from cubic lattice light test pattern A1, B1, C1 and D1 respectively.Also has the test pattern F that the 1st smooth test pattern 6a has the test pattern E of the detection that is used for the back light that produces from negative one-level light reflection and is used for detecting from the back light that positive one-level light reflection produces.Detect tracking error signal according to the result of calculation of (IE-IF), just wherein said and just from the signal of light test pattern E and F output, and, detect the RF signal according to the result of calculation of (IA1+IB1+IC1+ID1).
In order to read DVD-ROM, design and be used in CD and the general object lens 5 of DVD-ROM that the recording density aspect differs from one another.When reading DVD-ROM with object lens 5, because the spherical image missionary society of object lens 5 makes luminous point be amplified to the zone of detecting greater than light, so that the effective numerical aperture of object lens 5 diminishes, and effectively aberration also diminishes.In other words, because the photo detection area that is used for CD separates with the photo detection area that is used for DVD-ROM, so, can make it read CD after the 1st smooth test pattern shaping with CD for the suitable effective NA of object lens 5.
Then describe and read DVD-ROM with this light picker:
For from the DVD-ROM reading information, from being arranged near the 2nd light source 1b emission light the 1st light source 1a.The similar processing of program then to CD, wherein the light from the 2nd light source 1b output reaches the DVD-ROM information recording surface, and, from the back light transmitted beam separation vessel 3 of information recording surface.Yet, owing to the 1st and the 2nd light source 1a, 1b are separated out each other, so superimposed not exclusively each other on optical axis from the light beam of these light emitted.Therefore, the back light of transmitted beam separation vessel 3 will be directed on the 2nd smooth test pattern 6b of photodetector 6.Be similar to Fig. 2, Fig. 3 is the schematic plan view of the photodetector 6 seen from the arrow A of Fig. 1.As shown in Figure 3, the 2nd photodetector figure 6b has cubic lattice light test pattern A2, B2, C2 and D2, and it detects the back light that is produced by zero order light reflection on the information recording surface of DVD-ROM.According to [(IA2+IC2)-(IB2+ID2)] result of calculation detection of focus error signal, wherein IA2, IB2, IC2 and ID2 are the signals of exporting from A2, B2, C2 and D2 four directions lattice light test pattern respectively.Also have, [phase place (IA2+IC2)-phase place (the IB2+ID2)] result of calculation that obtains according to (DPD) method that detected by out of phase detects tracking error signal and detects the RF signal according to (IA2+IB2+IC2 and ID2) result of calculation.Be noted that by diffraction grid 2 and separate and at the positive and negative one-level light beam of DVD-ROM information recording surface reflection and be not used in the detection of any signal.
In the light picker that Fig. 1 shows, diffraction grid 2 are configured in the light path between light source 1 and the beam separator 3.Fig. 4 is the synoptic diagram that the light picker of the 1st embodiment changes according to the present invention shown in Figure 1.Be noted that among Fig. 4, represent with label same among Fig. 1 to 3 with element same among Fig. 1 to 3.As shown in Figure 4, change in the example without diffraction grid 2 at this.That is, change in the example, use diffraction phase to detect (DPD) method and offer CD and DVD-ROM tracking error signal at this.Fig. 5 is the planimetric map that arrow B is seen from Fig. 4 the 1st embodiment at Fig. 4 changes the photodetector 6 that uses in the example, as shown in Figure 5, the 1st smooth test pattern 6a that is used for CD comprises cubic lattice light test pattern A1, B1, C1 and D1, simultaneously, the 2nd smooth test pattern 6b that is used for DVD-ROM comprises cubic lattice light test pattern A2, B2, C2 and D2.
Fig. 6 is the synoptic diagram of another variation of light picker of the present invention the 1st embodiment.Be noted that in Fig. 6, represent with label same among Fig. 1 to 5 with element same among Fig. 1 to 5.As shown in the drawing, the 1st and the 2nd light source 1a, the 1b of light source 1 are arranged on the Semiconductor substrate.That is, light source 1 can be so-called multi-emitting light source.In that being set on the same Semiconductor substrate, the 1st and the 2nd light source allows between them hi-Fix at certain intervals.Specifically, the back light that reflection of light produced of 1 emission of the light source from the optical recording media is directed on the 1st and the 2nd smooth test pattern 6a, the 6b of photodetector 6 with high precision.Therefore, comprise that the 1st and the 2nd light source 1a, 1b and the light source 1 that is arranged on the Semiconductor substrate also can be used for the light picker shown in Fig. 1.
The 2nd embodiment
Referring now to Fig. 7, this figure is the synoptic diagram of the light picker of the present invention the 2nd embodiment, and described light picker is suitable for handling two kinds of non-optical recording medias of the same type that differ from one another aspect recording density, as CD and DVD-ROM.It should be noted, represent with label same among Fig. 1 to 6 with element same among Fig. 1 to 6.As shown in the drawing, light picker comprises light source 1.Light source 1 has the 1st light source 1a, and for example giving, the CD emission wavelength is the light of 785nm; With the 2nd light source 1b, for example giving, the DVD-ROM emission wavelength is the light of 655nm.The the 1st and the 2nd light source 1a, 1b are set separated from one anotherly.Light compositing optical element 7 is installed between the 1st and the 2nd light source 1a, the 1b.As shown in the figure, photodetector 6 is housed also, it has for the 1st smooth test pattern 6a of CD and is the 2nd smooth test pattern 6b of DVD-ROM.Be formed on the substrate with preset space length between the 1st and the 2nd smooth test pattern 6a, the 6b, and be packaged together.
At first, describe with this light picker reading CD:
For from the CD reading information, be divided into 3 bundles (zero level, positive one-level and negative one-level) that different directions transmits from the diffracted grid 2 of the light of the 1st light source 1a.These light beams are reflected by light compositing optical element 7, and incide on the beam separator 3 that is formed by transparent parallel flat.Every bundle by the zero level of beam separator 3 reflections, positive one-level and negative one-level light beam incides on the collimator lens 4, and collimated device lens 4 collimations, makes it parallel to each other.Independently assembled by object lens 5 by the zero level of collimator lens 4, positive one-level and negative one-level light beam, to form 3 luminous points on the CD information recording surface in the present embodiment.Transmit by object lens 5, collimator lens 4 and beam separator 3 from the zero level on the CD information recording surface, positive one-level and the every bundle of the negative one-level light beam back light that is produced that is reflected, then, the 1st light that incides photodetector 6 detects on Fig. 6 a again.As shown in Figure 2, the 1st smooth test pattern 6a has cubic lattice light test pattern A1, B1, C1 and D1, and it detects the back light that is produced by the zero level reflection of light that reflects on the CD information recording surface.According to the result of calculation detection of focus error signal of [(IA1+IC1)-(IB1+ID1)], wherein IA1, IB1, IC1 and ID1 are the signals of exporting from cubic lattice light test pattern A1, B1, C1 and D1 respectively.Also have, the 1st smooth test pattern 6a has the test pattern E of the detection that is used for the back light that negative one-level light reflection produced and is used for the test pattern F that back light that positive one-level light reflection produced detects.Result of calculation according to (IE-IF) detects tracking error signal, and wherein said IE and IF are the signals from light test pattern E and F output, and, detect the RF signal according to (IA1+IB1+IC1+ID1) result of calculation.
Then describe and read DVD-ROM:
For from the DVD-ROM reading information, by the light of the 2nd light source 1b emission by light compositing optical element 7.The similar processing of program then to CD, wherein the light by the 2nd light source 1b output reaches the DVD-ROM information recording surface, and, from the back light transmitted beam separation vessel 3 of information recording surface.Yet, owing to the 1st and the 2nd light source 1a, 1b are separated out each other, so superimposed not exclusively each other on optical axis from the light beam of these light emitted.Be similar to photodetector shown in Figure 36, the 2 photodetector figure 6b and have cubic lattice light test pattern A2, B2, C2 and D2, it detects the back light that the zero order light reflection is produced on the information recording surface of DVD-ROM.According to [(IA2+IC2)-(IB2+ID2)] result of calculation detection of focus error signal, wherein IA2, IB2, IC2 and ID2 are the signals of exporting from A2, B2, C2 and D2 four directions lattice light test pattern respectively.Also have, [phase (IA2+IC2)-phase (the IB2+ID2)] result of calculation that obtains according to (DPD) method that detected by out of phase detects tracking error signal and detects the RF signal according to (IA2+IB2+IC2+ID2) result of calculation.Be noted that by diffraction grid 2 and separate and at the positive and negative one-level light beam of information recording surface reflection and be not used in the detection of any signal.
Be similar to the variation of the light picker of the present invention the 1st embodiment, the diffraction grid 2 that are arranged between the 1st light source 1a and the light compositing optical element 7 can save, and out of phase detects the tracking error signal that (DPD) method can be used for offering CD and DVD-ROM.In this case, the 1st smooth test pattern 6a that is used for CD photodetector 6 comprises cubic lattice light test pattern A1, B1, C1 and D1, and simultaneously, the 2nd smooth test pattern that is used for DVD-ROM comprises cubic lattice light test pattern A2, B2, C2 and D2, as shown in Figure 5.
The 3rd embodiment
Referring now to Fig. 8, this figure is the configuration explanation of optical recording/reproducing device schematic block diagram of the present invention the 3rd embodiment, and described equipment uses the 1st or the 2nd embodiment of light picker of the present invention.
Optical recording/reproducing device comprises the Spindle Motor 8 that shell (displaying) is housed, and this shell is held CD or the DVD-ROM in the equipment of being arranged on securely.This equipment also comprises the light picker of representing with label 10 as arbitrary example among the present invention the 1st and the 2nd embodiment.In addition, also be included in sled motor 9 and the guiding mechanism (not showing) that tracking direction moves light picker 10.Object lens 5 included in the light picker 10 are provided with movably at tracking direction at least, and fixing optical element except object lens 5.
In order to control the overall optical record/playback device, be provided with system controller 15, it provides control for servo processor/sense data detuner 12.That is, system controller 15 is by control servo processor/whole optical recording/reproducing devices of sense data detuner 12 controls.When any is contained on the Spindle Motor 8 as CD or DVD-ROM, for CD or DV D-ROM select in corresponding all light sources one, made speed that light picker 10 moves etc. at tracking direction by sled motor 9.Read output signal from light picker 10 offers RF matrix amplifier 11, with detection of focus error signal, tracking error signal, indicate the CD of sense information or the positional information of the position on the DVD-ROM etc. from it and produce read signal from the RF signal.The signal that RF matrix amplifier 11 provides for servo processor/sense data detuner 12 to amplify.Servo processor/sense data detuner 12 comprises and is suitable for the sense data detuner of demodulation from CD and any information of DVD-ROM.
For above-mentioned signal, make to focus on and tracking error signal filtering, and offer driver 13 respectively as focus control signal and tracking control signal.Servo-driver 13 usefulness focus control signals drive the focusing coil that is included in for example dual-axis actuator in the light picker 10, and drive the tracking coil that is also included within the dual-axis actuator in the light picker 10 with tracking control signal.The low-frequency component of tracking control signal offers servo-driver 13, to drive sled motor 9.Therefore, can control the servo gain of focus servo, tracking servo and slide plate by feedback servo.
Handle by servo processor/sense data detuner 12 and to indicate from it that the CD or the DVD-ROM of sense information go up the positional information of position, provide spindle control signal to give Spindle Motor driver 14.Like this, with corresponding to CD that is contained in the sense information from it on the Spindle Motor 8 or the position on the DVD-ROM, the drive shaft motor 8 at a predetermined velocity, and the actual reading of beginning.Be provided for the outside by the sense data that servo processor/sense data detuner 12 demodulates.
Hereinbefore, the present invention the 1st and the 2nd embodiment to relevant be suitable for handling as the CD of dissimilar optical recording media examples and the light picker of DVD-ROM describe, and the present invention the 3rd embodiment illustrates the optical recording/reproducing device about the light picker that uses the present invention the 1st and the 2nd embodiment.Yet, it should be noted that the present invention is not limited only to these embodiment, but the combination that also can be suitable for read-only optical disc and can write down the reading type CD; But read-only optical disc and can write down, can read and the combination of erasing type CD; Can write down, readablely go out CD and can write down, can read and but erasing type CD and any other are wanted the combination of uniting.Certainly, such combination can comprise more than two kinds of dissimilar optical recording medias.
As the description of being done hereinbefore, the present invention can provide the small light detecting device that comprises the light test pattern that is provided with mutually with high precision, therefore provide optical pickup and small light record/playback device, it can write or sense data on dissimilar recording mediums in high quality.
Claims (16)
1. light picker comprises:
Two light sources, the emission light beams of different wavelengths, two light sources are separated from one another, make from the light beam of light emitted superimposed not exclusively each other on optical axis;
Photodetector has two light test pattern that are formed on the single substrate, and each light test pattern all is used to detect from each optical recording media and reflects the back light that is produced, and describedly only launches from each of two light sources; With
Optical system, the common light path that is extended to photodetector from two light sources of using.
2. light picker according to claim 1 is characterized in that, two light sources that provide wavelength to differ from one another light beam are set on a substrate.
3. light picker according to claim 1 is characterized in that, described optical system comprises:
A beam separator makes the light that returns from the light of each light source output of two light sources with from optical recording media separated from one another, and
An element makes from each output light of two light sources and assembles towards optical recording media.
4. light picker according to claim 3 is characterized in that described optical system further comprises the diffraction grid, and the output light from least one light source is separated into three beams.
5. light picker according to claim 3 is characterized in that, described two light sources comprise: the 1st light source, and emission has the light of the 1st wavelength; The 2nd light source, emission has the light of the 2nd wavelength; And optical element, make from the light path of the output light of the 1st and the 2nd light source and guide described optical system respectively into.
6. light picker according to claim 1 is characterized in that, described two light sources comprise: the 1st light source, and emission has the light of the 1st wavelength; The 2nd light source, emission has the light of the 2nd wavelength; The described the 1st is according to the type of the set optical recording media relevant with light picker with the 2nd light source, optionally is used.
7. light picker according to claim 6 is characterized in that, two light test pattern comprise the 1st smooth test pattern, and the light that is used to detect from the 1st light emitted reflects the back light that is produced at optical recording media; With the 2nd smooth test pattern, the light that is used to detect from the 2nd light emitted reflects the back light that is produced at optical recording media; The the 1st and the 2nd smooth test pattern is contained on the substrate.
8. light picker according to claim 1 is characterized in that, respectively from the light beam of two light emitted, each other not exclusively with they separately optical axis superimposedly by described optical system transmission.
9. optical recording/reproducing device comprises:
A light picker comprises:
Two light sources, the emission light beams of different wavelengths, two light sources are separated from one another, make from the light beam of light emitted superimposed not exclusively each other on optical axis;
Photodetector has two light test pattern that are formed on the single substrate, and each light test pattern all is used to detect from each optical recording media and reflects the back light that is produced, and describedly only launches from each of two light sources; With
Each optical system, the common light path that is extended to photodetector from two light sources of using; And also comprise:
Drive unit is used for driving at least the object lens as an optical system part on the tracking direction of optical recording media.
10. optical recording/reproducing device according to claim 9 is characterized in that, two light sources that provide wavelength to differ from one another light beam are set on a substrate.
11. optical recording/reproducing device according to claim 9 is characterized in that, described optical system comprises:
A beam separator makes the light that returns from the light of each light source output of two light sources with from optical recording media separated from one another; And
An element makes from each output light of two light sources and assembles towards optical recording media.
12. optical recording/reproducing device according to claim 11 is characterized in that, described optical system further comprises the diffraction grid, and the output light from least one light source is separated into three beams.
13. optical recording/reproducing device according to claim 11 is characterized in that, described two light sources comprise: the 1st light source, and emission has the light of the 1st wavelength; The 2nd light source, emission has the light of the 2nd wavelength; And optical element, make from the light path of the output light of the 1st and the 2nd light source and guide described optical system respectively into.
14. optical recording/reproducing device according to claim 9 is characterized in that, described two light sources comprise: the 1st light source, and emission has the light of the 1st wavelength; The 2nd light source, emission has the light of the 2nd wavelength; The described the 1st is according to the type of the set optical recording media relevant with light picker with the 2nd light source, optionally is used.
15. want 14 described optical recording/reproducing devices according to right, it is characterized in that two light test pattern comprise the 1st smooth test pattern, the light that is used to detect from the 1st light emitted reflects the back light that is produced at optical recording media; With the 2nd smooth test pattern, the light that is used to detect from the 2nd light emitted reflects the back light that is produced at optical recording media; The the 1st and the 2nd smooth test pattern is contained on the substrate.
16. the optical recording/reproducing device according to claim 9 is characterized in that, respectively from the light beam of two light emitted, each other not exclusively with they separately optical axis superimposedly by described optical system transmission.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11002204A JP2000207766A (en) | 1999-01-07 | 1999-01-07 | Optical pickup device and optical recording and reproducing apparatus provided therewith |
| JP2204/1999 | 1999-01-07 |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2005100601470A Division CN1667721A (en) | 1999-01-07 | 2000-01-07 | Optical pickup and optical recording/reproducing apparatus using the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1264899A CN1264899A (en) | 2000-08-30 |
| CN1203474C true CN1203474C (en) | 2005-05-25 |
Family
ID=11522837
Family Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2006100944916A Pending CN101093685A (en) | 1999-01-07 | 2000-01-07 | Optical pickup and optical recording/reproducing apparatus using the same |
| CNA2005100601470A Pending CN1667721A (en) | 1999-01-07 | 2000-01-07 | Optical pickup and optical recording/reproducing apparatus using the same |
| CNB001046934A Expired - Fee Related CN1203474C (en) | 1999-01-07 | 2000-01-07 | Optical pickup and optical recording/reproducing apparatus using the same |
Family Applications Before (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2006100944916A Pending CN101093685A (en) | 1999-01-07 | 2000-01-07 | Optical pickup and optical recording/reproducing apparatus using the same |
| CNA2005100601470A Pending CN1667721A (en) | 1999-01-07 | 2000-01-07 | Optical pickup and optical recording/reproducing apparatus using the same |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP2000207766A (en) |
| KR (1) | KR20000053390A (en) |
| CN (3) | CN101093685A (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100437655B1 (en) * | 2001-08-16 | 2004-06-30 | (주)해빛정보 | An integrated optical disk pickup device |
| JP4822037B2 (en) * | 2001-08-24 | 2011-11-24 | コニカミノルタホールディングス株式会社 | Objective lens of optical pickup device and optical pickup device |
| KR100438701B1 (en) * | 2001-09-17 | 2004-07-05 | 삼성전자주식회사 | Compatible optical pickup and adjusting method for set optical axis thereof |
| KR20030067165A (en) * | 2002-02-07 | 2003-08-14 | 삼성전기주식회사 | Optical pick-up |
| KR100472443B1 (en) | 2002-03-19 | 2005-02-21 | 삼성전자주식회사 | Optical pick-up apparatus |
| KR100477680B1 (en) * | 2002-11-12 | 2005-03-21 | 삼성전자주식회사 | Optical pickup |
| KR100477679B1 (en) * | 2002-11-12 | 2005-03-21 | 삼성전자주식회사 | Optical pickup |
| CN100407313C (en) * | 2003-04-25 | 2008-07-30 | 宾得株式会社 | Optical system of optical pick-up |
| JP2006012303A (en) * | 2004-06-25 | 2006-01-12 | Funai Electric Co Ltd | Optical pickup |
| JP2013020689A (en) | 2011-06-16 | 2013-01-31 | Sony Corp | Optical recording medium drive device and tracking error signal generating method |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09265656A (en) * | 1996-03-28 | 1997-10-07 | Victor Co Of Japan Ltd | Optical pickup |
| JP3244442B2 (en) * | 1996-08-30 | 2002-01-07 | 三洋電機株式会社 | Optical regeneration device |
| JPH11149657A (en) * | 1997-11-14 | 1999-06-02 | Sony Corp | Information recording and reproducing device, its method and optical pickup |
-
1999
- 1999-01-07 JP JP11002204A patent/JP2000207766A/en active Pending
-
2000
- 2000-01-05 KR KR1020000000300A patent/KR20000053390A/en not_active Application Discontinuation
- 2000-01-07 CN CNA2006100944916A patent/CN101093685A/en active Pending
- 2000-01-07 CN CNA2005100601470A patent/CN1667721A/en active Pending
- 2000-01-07 CN CNB001046934A patent/CN1203474C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| KR20000053390A (en) | 2000-08-25 |
| CN1264899A (en) | 2000-08-30 |
| JP2000207766A (en) | 2000-07-28 |
| CN1667721A (en) | 2005-09-14 |
| CN101093685A (en) | 2007-12-26 |
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