CN203276837U - Optical pick device and optical disc device - Google Patents
Optical pick device and optical disc device Download PDFInfo
- Publication number
- CN203276837U CN203276837U CN201190000742.4U CN201190000742U CN203276837U CN 203276837 U CN203276837 U CN 203276837U CN 201190000742 U CN201190000742 U CN 201190000742U CN 203276837 U CN203276837 U CN 203276837U
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- optical
- laser
- oscillation wavelength
- optical surface
- integrating element
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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
- G11B7/123—Integrated head arrangements, e.g. with source and detectors mounted on the same substrate
-
- 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
- G11B7/125—Optical beam sources therefor, e.g. laser control circuitry specially adapted for optical storage devices; Modulators, e.g. means for controlling the size or intensity of optical spots or optical traces
- G11B7/127—Lasers; Multiple laser arrays
- G11B7/1275—Two or more lasers having different wavelengths
-
- 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
- G11B7/1362—Mirrors
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- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Head (AREA)
Abstract
Provided is an optical pick device and an optical disc device. The optical pick device (104) is provided with a first optical integrated component (201) which outputs laser in a first oscillation wavelength, a second optical integrated component (202) which outputs laser in a second oscillation wavelength, an optical beam splitter (205), a collimating optics system (206), and a convergence optics system (207). In a first optical path between the optical beam splitter and the first optical integrated component, a concave lens (204) with negative refractive power, and a holophote (203) are configured. A focal length of the collimating optics system is set so that edge light intensity corresponding to the laser with the second oscillation wavelength is at a minimum value in a first preset range, and a focal length of the concave lens is set so that edge light intensity corresponding to the laser with the first oscillation wavelength is at a minimum value in a second preset range. The first optical integrated component is configured on an end of the first optical path after light is bended by the holophote, and the first optical integrated component is configured adjacent to the second optical integrated component.
Description
Technical field
The utility model relates to from the technology of optical disc replay recorded information.
Background technology
Digital versatile disc) or BD(Blu-ray Disc compact discs), DVD(Digital Versatile Disc CD(Compact Disc::: Blu-ray Disc; Registered trademark) such CD is record-playback information non-contactly, can realize large capacity and more inexpensive information recording carrier, therefore is widely used in commercial production and even civilian.The high capacity of CD can followingly be realized: what make the rail-like that is formed at CD or spiral helicine track record records mark (comprising pit and phase change mark) microminiaturization, and corresponding with it, the short wavelengthization of the laser by being used for recording and reconstruction and the numerical aperture (NA:Numerical Aperture) of object lens high-valued makes the focal point size microminiaturization of focal plane.
For example, in CD, be about 1.2mm as the thickness of the disc board of light transmission layer, optical maser wavelength is about 780nm, the NA of object lens is 0.45, can realize the capacity of 650MB.In DVD, be about 0.6mm as the thickness of the disc board of light transmission layer, optical maser wavelength is about 650nm, NA is 0.6, can realize the capacity of 4.7GB.And in the BD of high record density, can be by being about 0.1mm as the reduced thickness of the protective seam of the light transmission layer that covers optical recording layer, optical maser wavelength is made as about 405nm, and NA is made as 0.85, realizes the high capacity that 25GB is above.
In addition, CD is universal and be used to various scenes along with it.Therefore, save for the raising that realizes mobility and space from the equipment of optical disc replay information and require further miniaturization.For the miniaturization of this equipment, the miniaturization that is equipped on the optical take-up apparatus of this equipment is essential.For example, in TOHKEMY 2010-102810 communique (patent documentation 1) and TOHKEMY 2007-250123 communique (patent documentation 2), disclose the technology of using light-emitting component and the integrated optical integrating element of photo detector to realize the miniaturization of optical take-up apparatus.
The prior art document
Patent documentation
Patent documentation 1: TOHKEMY 2010-102810 communique (the 0011st section etc.)
Patent documentation 2: TOHKEMY 2007-250123 communique
The utility model content
The problem that utility model will solve
In recent years, providing can be from the optical take-up apparatus of the different multiple kinds of optical disc information reproduction of the standards such as DVD, BD.In this optical take-up apparatus, be equipped with the different multiple LASER Light Source (light-emitting component) of oscillation wavelength according to the kind of CD, and be equipped with and be designed to and the oscillation wavelength of LASER Light Source corresponding optics respectively, therefore there be the problem of optics number more than becoming.Disclosing in patent documentation 1 and adopt optical integrating element to realize the technology of the miniaturization of optical take-up apparatus, is limited but utilize the miniaturization of the device of this technology realization.
As other method that is used for miniaturization, as patent documentation 2 records, consider by making multiple LASER Light Source share the method that a part of optics (for example object lens or collimation lens) reduces the optics number.But there are the following problems when sharing optics: although can access the reproduction performance of expectation for the CD of Partial Species, be difficult to the reproduction performance that obtains expecting for the CD of other kind.
In view of the above problems, the purpose of this utility model is to provide a kind of optical take-up apparatus and optical disc apparatus, in the situation that carry the mutually different a plurality of LASER Light Source of oscillation wavelength corresponding to multiple kinds of optical disc, even these LASER Light Source share a part of optics, also can be for the miniaturization of CD implement device when guaranteeing good reproduction performance of all categories.
Be used for solving the means of problem
The optical take-up apparatus of the 1st mode of the present utility model is characterised in that, this optical take-up apparatus has: the 1st optical integrating element, the 1st LASER Light Source that it comprises the 1st photo detector and penetrates the laser of the 1st oscillation wavelength; The 2nd optical integrating element, the 2nd LASER Light Source that it comprises the 2nd photo detector and penetrates the laser of the 2nd oscillation wavelength of being longer than described the 1st oscillation wavelength; Beam splitter, it has the 1st optical surface, the 2nd optical surface and the 3rd optical surface, guiding makes it from described the 3rd optical surface outgoing from described the 1st optical integrating element through the laser that the 1st light path incides described the 1st oscillation wavelength of described the 1st optical surface, and guiding makes it from described the 3rd optical surface outgoing from described the 2nd optical integrating element through the laser that the 2nd light path incides described the 2nd oscillation wavelength of described the 2nd optical surface; The collimating optics system, it will convert the 1st directional light to from the laser of described the 1st oscillation wavelength of described the 3rd optical surface outgoing of described beam splitter, and, will convert the 2nd directional light to from the laser of described the 2nd oscillation wavelength of described the 3rd optical surface outgoing; Convergence optical system, it will converge to CD from described the 1st directional light that described collimating optics system penetrates, and, will converge to described CD from described the 2nd directional light that described collimating optics system penetrates; Negative lens, it is configured in described the 1st light path, has the negative refractive power that the laser that makes described the 1st oscillation wavelength that penetrates from described the 1st optical integrating element is dispersed; and completely reflecting mirror, it is configured in described the 1st light path, make the laser of described the 1st oscillation wavelength that penetrates from described the 1st optical integrating element towards the direction reflection of described the 1st optical surface, the back light of being returned by described CD reflection incides described the 3rd optical surface of described beam splitter through described convergence optics unify described collimating optics system, the laser of described the 1st oscillation wavelength in the described back light of described beam splitter guiding makes it from described the 1st optical surface outgoing, and, guide the laser of described the 2nd oscillation wavelength in described back light to make it from described the 2nd optical surface outgoing, described the 1st optical integrating element receives from described the 1st optical surface outgoing and through described negative lens and described completely reflecting mirror and the laser of described the 1st oscillation wavelength of incident, described the 2nd optical integrating element receives from the laser of described the 2nd oscillation wavelength of described the 2nd optical surface outgoing, the focal length of described collimating optics system is configured to make the rim light intensity corresponding with the laser of described the 2nd oscillation wavelength minimum value in the 1st preset range, the focal length of described negative lens is configured to make the value of the rim light intensity corresponding with the laser of described the 1st oscillation wavelength minimum in the 2nd preset range, described the 1st optical integrating element is configured in the end by described the 1st light path after described completely reflecting mirror bending, and with described the 2nd optical integrating element disposed adjacent.
The optical disc apparatus of the 2nd mode of the present utility model is characterised in that, this optical disc apparatus has described optical take-up apparatus.
The utility model effect
According to the utility model, can guarantee good reproduction performance when using the 1st LASER Light Source of the 1st optical integrating element in the miniaturization of implement device.
Description of drawings
Fig. 1 is the functional block diagram of structure that the optical disc apparatus of embodiment 1 of the present utility model roughly is shown.
(A) of Fig. 2, (B) are the figure of structure that the optical take-up apparatus of embodiment 1 roughly is shown.
Fig. 3 roughly illustrates DVD/CD in the optical take-up apparatus of embodiment 1 with the figure of the light path of laser.
Fig. 4 roughly illustrates BD in the optical take-up apparatus of embodiment 1 with the figure of the light path of laser.
(A)～(C) of Fig. 5 is the figure for explanation beam spread angle.
Fig. 6 is the curve map that illustrates with respect to by focal length, the outer rim light intensity radially of the optical system that constitutes of collimation lens and negative lens.
(A) of Fig. 7, (B) are the figure of structure that the optical take-up apparatus of embodiment 2 of the present utility model roughly is shown.
Fig. 8 roughly illustrates DVD/CD in the optical take-up apparatus of embodiment 2 with the figure of the light path of laser.
Fig. 9 roughly illustrates BD in the optical take-up apparatus of embodiment 2 with the figure of the light path of laser.
(A) of Figure 10, (B) are the figure of structure that the optical take-up apparatus of embodiment 3 of the present utility model roughly is shown.
(A) of Figure 11, (B) are the figure of structure that the optical take-up apparatus of embodiment 4 of the present utility model roughly is shown.
Embodiment
Below, with reference to accompanying drawing, various embodiment of the present utility model is described.
Embodiment 1
Fig. 1 is the functional block diagram of structure that the optical disc apparatus 1 of embodiment 1 of the present utility model roughly is shown.(A) of Fig. 2, (B) are the figure that the structure of the optical take-up apparatus 104 in optical disc apparatus 1 roughly is shown.
As shown in Figure 1, optical disc apparatus 1 has: turntable 102, and its loading and unloading are equipped with CD 101 freely; As the spindle motor 103 of dish drive division, it is rotated driving to this turntable 102; Optical take-up apparatus 104, it carries out reading of recorded information from CD 101; And spiral (thread) driving mechanism 105, it makes this optical take-up apparatus 104 position this optical take-up apparatus 104 along radially (radial direction) of CD 101 is mobile.And optical disc apparatus 1 has matrix circuit 106, signal reproduction circuit 107, servo circuit 108, main shaft control circuit 109, laser control circuit 110, spiral (thread) control circuit 111 and controller 112.
Optical take-up apparatus 104 has following function: when information regeneration or when record to CD 101 irradiating lasers, receive the back light that the information recording layer by CD 101 reflects and generate detection signal, and this detection signal is outputed to matrix circuit 106.(A) of Fig. 2 is from the vertical view of the normal direction vertical with the information recording surface of CD 101 (with the X-axis Z-direction vertical with Y-axis) when observing optical take-up apparatus 104, and (B) of Fig. 2 is the skeleton diagram when (X-direction) observes optical take-up apparatus 104 a part of from the side.As shown in Fig. 2 (A), (B), optical take-up apparatus 104 has housing CS, and this housing CS has the long limit radially along CD 101.In addition, optical take-up apparatus 104 has optical integrating element 201,202, catoptron 203, has negative lens (concavees lens) 204, the colour splitting prism 205 as beam splitter, collimation lens 206 and the actuator for objective lenses 209 of negative refractive power.
The reproduction performance of light time deteriorated.
As described above, according to the optical take-up apparatus 104 of embodiment 1, even sharing focal distance f for the miniaturization of optical system
1In the situation of shorter collimation lens 206, compare with the situation that does not adopt negative lens 204, also can increase rim light intensity and reduce the focal point diameter.Therefore, the reproduction performance in the time of can preventing from using BD with laser deteriorated.In addition, by adopting negative lens 204, although BD is longer with the light path total length of laser than DVD/CD with the light path total length of laser, by the light path of catoptron 203 these BD of bending with laser.Therefore, optical integrating element 201 and optical integrating element 202 can be configured adjacent to each other, the tangential physical dimension of optical take-up apparatus 104 can be reduced.
In addition, as shown in Figure 2, the optical axis (optical centre axle) of the optical axis (optical centre axle) of optical integrating element 201 and optical integrating element 202 is adjusted to is parallel to each other, can realize thus the miniaturization of optical take-up apparatus 104.
In addition, BD is with existing path difference between the light path of laser and the light path of DVD/CD with laser, and this path difference can not make spherical aberration correction is exerted an influence.For example, can proofread and correct the spherical aberration that causes with the light path of laser due to DVD/CD by the lens peculiarity of optimizing the optical system on this light path.In addition, can use collimation lens driving mechanism 210 to proofread and correct in the situation that the spherical aberration that CD 101 produces as BD.
Embodiment 2
Then, embodiment 2 of the present utility model is described.(A) of Fig. 7, (B) are the figure of structure that the optical take-up apparatus 104B of embodiment 2 roughly is shown.The structure of the optical disc apparatus of present embodiment has except substituting above-mentioned optical take-up apparatus 104 the optical take-up apparatus 104B this point of (A), (B) of Fig. 7, and is identical with the structure of above-mentioned optical disc apparatus 1.
(A) of Fig. 7 is from the vertical view of the normal direction vertical with the information recording surface of CD 101 (with the X-axis Z-direction vertical with Y-axis) when observing this optical take-up apparatus 104B, and (B) of Fig. 7 is the skeleton diagram when (X-direction) observes optical take-up apparatus 104B a part of from the side.In (A), (B) and Fig. 2 of Fig. 7 (A), (B), the textural element of mark same-sign has identical function, and description is omitted.
As shown in Fig. 7 (A), optical take-up apparatus 104B has optical integrating element 201,202, catoptron 203B, has negative lens (concavees lens) 204B, the colour splitting prism 205B as beam splitter, collimation lens 206, actuator for objective lenses 209 and the collimation lens driving mechanism 210 of negative refractive power.
Fig. 8 is the figure that the light path of the DVD/CD use laser in optical take-up apparatus 104B roughly is shown.As shown in Figure 8, the DVD/CD that penetrates from optical integrating element 202 incides the optical surface 205Bc of colour splitting prism 205B with laser La, after the inside of colour splitting prism 205B is reflected, be converted to directional light by collimation lens 206.Up skeleton diagram when a part of.
The difference of the optical take-up apparatus 104C of embodiment 3 and the optical take-up apparatus 104 of embodiment 1 is, about the straight line A1 line of the central point that connects turntable 102 and the optical axis center that exchanges object lens 207 interchange structure key element 201～206,209,210 symmetrically.Therefore, the textural element of the optical take-up apparatus 104 of the textural element of the optical take-up apparatus 104C of embodiment 3 and embodiment 1 is configured to that line is symmetrical each other about straight line A1.Therefore, in the situation that present embodiment also can access the effect identical with the situation of above-mentioned embodiment 1.
Embodiment 4
Then, embodiment 4 as the variation of above-mentioned embodiment 2 is described.(A) of Figure 11, (B) are the figure of structure that the optical take-up apparatus 104D of embodiment 4 roughly is shown.(A) of Figure 11 is that (B) of Figure 11 is the general profile chart when (X-direction) observes optical take-up apparatus 104D from the side from the vertical view of the normal direction vertical with the information recording surface of CD 101 (with the X-axis Z-direction vertical with Y-axis) when observing this optical take-up apparatus 104D.
The difference of the optical take-up apparatus 104D of embodiment 4 and the optical take-up apparatus 104B of embodiment 2 is, about the straight line A2 line of the central point that connects turntable 102 and the optical axis center that exchanges object lens 207 interchange structure key element 201,202,203B, 204B, 205B, 206,209,210 symmetrically.Therefore, the textural element of the optical take-up apparatus 104B of the textural element of the optical take-up apparatus 104D of embodiment 4 and embodiment 2 is configured to that line is symmetrical each other about straight line A2.Therefore, in the situation that present embodiment also can access the effect identical with the situation of above-mentioned embodiment 2.
Above, narrated embodiment of the present utility model with reference to accompanying drawing, but they are all illustrations of the present utility model, can also adopt above-mentioned various structures in addition.For example, in above-mentioned embodiment 1～4, optical take-up apparatus 104,104B～104D have the optical integrating element 201,202 that penetrates three kinds of different laser of oscillation wavelength, but the kind of laser is not limited to three kinds.
Label declaration
1 optical disc apparatus; 101 CDs; 102 turntables; 103 spindle motors; 104 optical take-up apparatus; 105 screw drives mechanisms; 106 matrix circuits; 107 signal reproduction circuits; 108 servo circuits; 109 main shaft control circuits; 110 laser control circuits; 111 spiral control circuits; 112 controllers; 201,202 optical integrating elements; 203,203B catoptron; 204,204B negative lens; 205,205B colour splitting prism (beam splitter); 206 collimation lenses; 207 exchange object lens; 208 catoptrons (up mirror: light-rising mirror); 209: actuator for objective lenses; 210: the collimation lens driving mechanism.
Claims (10)
1. an optical take-up apparatus, is characterized in that, this optical take-up apparatus has:
The 1st optical integrating element, the 1st LASER Light Source that it comprises the 1st photo detector and penetrates the laser of the 1st oscillation wavelength;
The 2nd optical integrating element, the 2nd LASER Light Source that it comprises the 2nd photo detector and penetrates the laser of the 2nd oscillation wavelength of being longer than described the 1st oscillation wavelength;
Beam splitter, it has the 1st optical surface, the 2nd optical surface and the 3rd optical surface, guiding makes it from described the 3rd optical surface outgoing from described the 1st optical integrating element through the laser that the 1st light path incides described the 1st oscillation wavelength of described the 1st optical surface, and guiding makes it from described the 3rd optical surface outgoing from described the 2nd optical integrating element through the laser that the 2nd light path incides described the 2nd oscillation wavelength of described the 2nd optical surface;
The collimating optics system, it will convert the 1st directional light to from the laser of described the 1st oscillation wavelength of described the 3rd optical surface outgoing of described beam splitter, and, will convert the 2nd directional light to from the laser of described the 2nd oscillation wavelength of described the 3rd optical surface outgoing;
Convergence optical system, it will converge to CD from described the 1st directional light that described collimating optics system penetrates, and, will converge to described CD from described the 2nd directional light that described collimating optics system penetrates;
Negative lens, it is configured in described the 1st light path, has the negative refractive power that the laser that makes described the 1st oscillation wavelength that penetrates from described the 1st optical integrating element is dispersed; And
Completely reflecting mirror, it is configured between described negative lens and described the 1st optical integrating element in described the 1st light path, makes the laser of described the 1st oscillation wavelength that penetrates from described the 1st optical integrating element towards the direction reflection of described the 1st optical surface,
The back light of being returned by described CD reflection incides described the 3rd optical surface of described beam splitter through described convergence optics unify described collimating optics system,
The laser of described the 1st oscillation wavelength in the described back light of described beam splitter guiding makes it from described the 1st optical surface outgoing, and, guide the laser of described the 2nd oscillation wavelength in described back light to make it from described the 2nd optical surface outgoing,
Described the 1st optical integrating element receives from described the 1st optical surface outgoing and through described negative lens and described completely reflecting mirror and the laser of described the 1st oscillation wavelength of incident,
Described the 2nd optical integrating element receives from the laser of described the 2nd oscillation wavelength of described the 2nd optical surface outgoing,
The focal length of described collimating optics system is configured to make the rim light intensity corresponding with the laser of described the 2nd oscillation wavelength minimum value in the 1st preset range,
The focal length of described negative lens is configured to make the value of the rim light intensity corresponding with the laser of described the 1st oscillation wavelength minimum in the 2nd preset range,
Described the 1st optical integrating element is configured in the end by described the 1st light path after the bending of described completely reflecting mirror, and with described the 2nd optical integrating element disposed adjacent.
2. optical take-up apparatus according to claim 1, is characterized in that,
The optical axis of the optical axis of described the 1st optical integrating element and described the 2nd optical integrating element is parallel to each other.
3. optical take-up apparatus according to claim 1 and 2, is characterized in that,
Be I establishing the rim light intensity corresponding with the laser of described the 2nd oscillation wavelength
RIM, the focal length that makes light incide the described collimating optics system of described convergence optical system is f, and the beam spread angle of described the 2nd LASER Light Source is θ, and its unit is ° that the pupil diameter of described convergence optical system is
When scale-up factor was K, the focal distance f of described collimating optics system was provided by following formula,
4. optical take-up apparatus according to claim 1 and 2, is characterized in that,
Minimum value in described the 1st preset range is 55%,
Minimum value in described the 2nd preset range is 60%.
5. optical take-up apparatus according to claim 1 and 2, is characterized in that,
Described the 1st oscillation wavelength is 405nm,
Described the 2nd oscillation wavelength is 650nm.
6. optical take-up apparatus according to claim 1 and 2, is characterized in that,
Described convergence optical system comprises the laser of described the 1st oscillation wavelength and the shared object lens of laser of described the 2nd oscillation wavelength,
Described object lens have the 1st numerical aperture for the laser of described the 1st oscillation wavelength, and, have 2nd numerical aperture less than described the 1st numerical aperture for the laser of described the 2nd oscillation wavelength.
7. optical take-up apparatus according to claim 1 and 2, is characterized in that,
The laser that described beam splitter makes described the 1st oscillation wavelength that incides described the 1st optical surface sees through the laser of described the 2nd oscillation wavelength that incides described the 2nd optical surface towards the direction reflection of described collimating optics system.
8. optical take-up apparatus according to claim 1 and 2, is characterized in that,
The laser that described beam splitter makes described the 2nd oscillation wavelength that incides described the 2nd optical surface sees through the laser of described the 1st oscillation wavelength that incides described the 1st optical surface towards the direction reflection of described collimating optics system.
9. an optical disc apparatus, is characterized in that, this optical disc apparatus has the described optical take-up apparatus of claim 1 or 2.
10. optical disc apparatus according to claim 9, is characterized in that,
This optical disc apparatus also has signal reproduction circuit, and this signal reproduction circuit reproduces the recorded information of described CD according to from the 1st photo detector of described optical take-up apparatus and the detection signal of the output of any one party the 2nd photo detector.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010214232 | 2010-09-24 | ||
| JP2010-214232 | 2010-09-24 | ||
| PCT/JP2011/070811 WO2012039318A1 (en) | 2010-09-24 | 2011-09-13 | Optical pickup device and optical disc device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203276837U true CN203276837U (en) | 2013-11-06 |
Family
ID=45873806
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201190000742.4U Expired - Fee Related CN203276837U (en) | 2010-09-24 | 2011-09-13 | Optical pick device and optical disc device |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPWO2012039318A1 (en) |
| CN (1) | CN203276837U (en) |
| WO (1) | WO2012039318A1 (en) |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001184707A (en) * | 1999-12-28 | 2001-07-06 | Sharp Corp | Optical pickup and optical disk drive |
| JP2002184019A (en) * | 2000-12-15 | 2002-06-28 | Olympus Optical Co Ltd | Separation-type optical head |
| JP2003123306A (en) * | 2001-10-11 | 2003-04-25 | Ricoh Co Ltd | Optical pickup device |
| JP2003331455A (en) * | 2002-05-09 | 2003-11-21 | Ricoh Co Ltd | Optical pickup device and optical disk drive |
| JP2003331456A (en) * | 2002-05-09 | 2003-11-21 | Ricoh Co Ltd | Optical pickup device and optical disk drive |
| JP2005093008A (en) * | 2003-09-18 | 2005-04-07 | Ricoh Co Ltd | Optical pickup device and optical disk drive |
| JP2005285150A (en) * | 2004-03-26 | 2005-10-13 | Ricoh Co Ltd | Optical pickup apparatus and optical disk drive apparatus equipped with the same |
| JP4568612B2 (en) * | 2005-01-19 | 2010-10-27 | 株式会社リコー | Optical head and optical disk drive device |
| JP2007250123A (en) * | 2006-03-17 | 2007-09-27 | Sharp Corp | Optical pickup device |
| JP4980364B2 (en) * | 2006-10-11 | 2012-07-18 | パナソニック株式会社 | DRIVE DEVICE, OPTICAL HEAD, AND OPTICAL DISK RECORDING / REPRODUCING DEVICE |
-
2011
- 2011-09-13 JP JP2012535002A patent/JPWO2012039318A1/en active Pending
- 2011-09-13 CN CN201190000742.4U patent/CN203276837U/en not_active Expired - Fee Related
- 2011-09-13 WO PCT/JP2011/070811 patent/WO2012039318A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| WO2012039318A1 (en) | 2012-03-29 |
| JPWO2012039318A1 (en) | 2014-02-03 |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131106 Termination date: 20190913 |
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| CF01 | Termination of patent right due to non-payment of annual fee |