CN1281216A - Multi-layer optical head for 3D storage - Google Patents
Multi-layer optical head for 3D storage Download PDFInfo
- Publication number
- CN1281216A CN1281216A CN00124422A CN00124422A CN1281216A CN 1281216 A CN1281216 A CN 1281216A CN 00124422 A CN00124422 A CN 00124422A CN 00124422 A CN00124422 A CN 00124422A CN 1281216 A CN1281216 A CN 1281216A
- Authority
- CN
- China
- Prior art keywords
- optical axis
- laser
- collimating mirror
- object lens
- write
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Optical Head (AREA)
- Optical Recording Or Reproduction (AREA)
Abstract
本发明涉及一种多层三维存储光学头,该光学头中,激光器、倍频器、准直镜和两个分光镜构成主光轴。物镜、右侧分光镜、辅助准直镜、辅助激光器同光轴安装,该光轴与主光轴成90°角。被读写盘片置于物镜的相对于分光镜的另一侧,另一准直镜和另一激光器与左侧分光镜同光轴安装,该光轴与主光轴成90°角,构成付光轴。联动调焦机构同时与两个准直镜相连。使用本发明可对多层三维光盘进行并行读写,有效提高光盘数据读写速率和存储容量。
The invention relates to a multi-layer three-dimensional storage optical head. In the optical head, a laser, a frequency multiplier, a collimating mirror and two beam splitters form a main optical axis. The objective lens, the right beam splitter, the auxiliary collimating mirror, and the auxiliary laser are installed on the same optical axis, and the optical axis forms an angle of 90° with the main optical axis. The disk to be read and written is placed on the other side of the objective lens relative to the beam splitter, another collimator and another laser are installed on the same optical axis as the left beam splitter, and the optical axis is at an angle of 90° to the main optical axis, forming a Pay optical axis. The linkage focusing mechanism is connected with two collimating mirrors at the same time. The invention can read and write multilayer three-dimensional optical discs in parallel, and effectively improve the data reading and writing rate and storage capacity of the optical discs.
Description
The present invention relates to a kind of multi-layer optical head for 3 D storage, belong to the 3-dimensional digital field of optical storage technology.
In present various multi-layer three-dimension storages, mainly based on following pattern.As shown in Figure 1, be the principle schematic of at present current three-dimensional storage scheme, its memory bank (2) is the memory bank of the photic off-color material of two-photon of a square.Lens pillar (4) is gathered into planar light with light beam and is used to select workplace.The light beam that another bundle is adjusted by recorded data shone memory bank by object lens (1).Like this in the intersection of two-beam, just information is write as in memory bank.When reading, still have planar light to select workplace, and incident light evenly throw light on, the information that writes down on workplace produces corresponding fluorescence, and obtains information by reading object lens (3) collimation back by ccd video camera.
Having obtained the successful example of comparison in this respect mainly is the storage system of joint studyes such as California, USA university and U.S. call-recall company, and as shown in Figure 2, its record body is a 1cm
3Two-photon absorbing material, the planar light of selecting workplace is by plane scintilloscope (135,136,148) and the light path formed of achromatism gun sight (10) produce, the operating illumination light path then has lens (143,144,145,146) and gun sight (7) form, read by CCD (9) video camera when reading.This method needs accurate XYZ worktable, the choosing of the face of finishing the work, and the record body can not be very big, restricted the application of this storage mode.Though high density and high data transmission rate are provided, because its expensive and huge three-dimensional working platform and parallel data read mode make it also far apart from practicality.
We prepare to adopt the storage system close with existing optical memory to realize when system design for this reason.
The objective of the invention is to design a kind of multi-layer optical head for 3 D storage, overcome existing three-dimensional storage and use that to intersect the memory device that two-beam causes huge and expensive, unworkable problem.Design simple in structure, easy to operate, the optical head of the multi-layer three-dimension that is suitable for using storage.
The multi-layer optical head for 3 D storage of the present invention's design comprises two laser instruments, a frequency multiplier, two collimation borders, two spectroscopes, an auxiliary collimating mirror, a laser-assisted, object lens and a ganged focus mechanism.Described laser instrument, frequency multiplier, collimating mirror and two spectroscopes are installed with optical axis from left to right, constitute primary optical axis.Object lens, right side spectroscope, auxiliary collimating mirror, laser-assisted are installed with optical axis, and this optical axis and primary optical axis are at an angle of 90.By the read-write disc place object lens with respect to spectroscopical opposite side, described another collimating mirror and another laser instrument are installed with optical axis with the left side spectroscope, this optical axis and primary optical axis at an angle of 90, a formation pair optical axis.Ganged focus mechanism links to each other with two collimating mirrors simultaneously.Laser-assisted produces a secondary laser beams and reads and writes on the primary reflection surface of disc in quilt by auxiliary collimating mirror, spectroscope and object lens focusing, and consequent signal is finished focusing, tracking and tracking.The laser instrument of primary optical axis and pair optical axis generates the laser that is used to wipe needed two kinds of wavelength, and two bundle laser, incide and read and write on the disc by object lens through spectroscopical synthetic, finish and wipe operation.Frequency multiplier is in order to generating a kind of in order in two kinds of wavelength lasers of write operation, by with the laser acting in conjunction that produces by laser instrument, finish write operation.Two collimation lenses in the main optical path are finished the zoom focusing by ganged focus mechanism, realize the selection to writable layer.
Use this multi-layer optical head for 3 D storage, can carry out concurrent reading and concurrent writing, effectively improve data of optical disk read-write speed and memory capacity the multi-layer three-dimension CD.And simple in structure, be convenient to realize, thereby be easy to obtain in actual applications promote, make product, very big use value is arranged.
Description of drawings
Fig. 1 is the principle of work that present various multi-layer three-dimensions are stored.
Fig. 2 is the storage system synoptic diagram of joint studyes such as California, USA university and U.S. call-recall company.
Fig. 3 is a multi-layer optical head for 3 D storage structural representation of the present invention.
Describe in detail with regard to each structural representation below, among Fig. 1～Fig. 3:
The 1st, object lens, the 2nd, two-photon absorbing material, the 3rd, object lens, the 4th, lens pillar, the 5th, Nd-YAG laser instrument, the 6th, mask, the 7th, gun sight, the 8th, record body, the 9th, ccd video camera, the 10th, achromatism gun sight, the 11st, He-Ne laser instrument, the 12nd, pulse daley worktable, 131～138th, plane mirror, 141～147th, lens, the 15th, laser instrument, the 16th, frequency multiplier, the 17th, collimating mirror, the 18th, spectroscope, the 19th, disc, the 20th, object lens, the 21st, spectroscope, the 22nd, laser-assisted, the 23rd, auxiliary collimating mirror, the 24th, laser instrument, the 25th, collimating mirror, the 26th, ganged focus mechanism.
As shown in Figure 3, multi-layer optical head for 3 D storage of the present invention comprises two laser instruments 15 and 24, frequency multiplier 16, two collimations border 17 and 25, two spectroscopes 18 and 21,22, one object lens 20 of 23, one laser-assisteds of an auxiliary collimating mirror and a ganged focus mechanism 26.Described laser instrument 15, frequency multiplier 16, collimating mirror 17 and left side spectroscope 18 are installed with optical axis from left to right, constitute primary optical axis.Object lens 20, right side spectroscope 21, auxiliary collimating mirror 23, laser-assisted 22 coaxial installations, this optical axis and primary optical axis are at an angle of 90.Read and write the opposite side with respect to spectroscope 21 that disc 19 places object lens 20, described another collimating mirror 25 and another laser instrument 24 and the 18 coaxial installations of left side spectroscope, this optical axis and primary optical axis constitute and pay an optical axis at an angle of 90.Ganged focus mechanism 26 links to each other with 25 with two collimating mirrors 17 simultaneously.Laser-assisted 22 produces a secondary laser beams and focuses on by on the primary reflection surface of read-write disc 19 by auxiliary collimating mirror 23, spectroscope 21 and object lens 20, and consequent signal is finished focusing, tracking and tracking.The laser instrument of primary optical axis and pair optical axis generates the laser that is used to wipe needed two kinds of wavelength, and two bundle laser, incide and read and write on the disc by object lens through spectroscopical synthetic, finish and wipe operation.Frequency multiplier 16 is in order to generating a kind of in order in two kinds of wavelength lasers of write operation, by with the laser acting in conjunction that produces by laser instrument 24, finish write operation.Two collimation lenses 17 in the main optical path and 25 are finished the zoom focusing by ganged focus mechanism, realize the selection to writable layer.
Fig. 3 is a fundamental diagram of the present invention.The auxiliary optical path that has laser-assisted (22) and auxiliary collimating mirror (23) to form in order to focus on memory disc (19) bottom surface, finishes focusing on and following the tracks of.The laser of two required wavelength of working has laser instrument (15 and 24) and produces, and the collimating mirrors (17 and 25) of two bundle laser are selected the read/write surface for read of layering by ganged focus mechanism (26) control.Optical maser wavelength when laser frequency multiplier (26) is then write and wiped in order to conversion.This method has overcome the equipment requirements of traditional three-dimensional storage, and memory bank can become the disk-like structure similar to present CD, has simplified storing mechanism, improves the capacity of the storage of storage time and expansion.
Consider that existing computer system internal information mainly stores with the serial data form and transmit.Therefore, data should be stored with serial mode.Owing to can not add pre-groove, make to focus on that tracking and tracking become difficulty in the multilayer manufacturing in the middle layer.In addition, since two-photon absorption, the control of the light beam of two wavelength of needs processing and confocal.In readout device, need to handle interlayer interference.Characteristics of the present invention are
(1) auxiliary beam to be realized following the tracks of focusing in order realizing and to be followed the tracks of and focus on, and introduces an auxiliary beam, and auxiliary beam is focused on the bottom surface all the time, finishes tracking, tracking and focusing.And main beam is finished the not selection of coplanar by zoom technology.On each layer, still adopt the read-write mode that is similar to existing CD in the read-write process, can on prior art, easier transplant and practicability like this.
(2) dual wavelength light bifocal lens all needs to enter from same main optical path owing to still use the laser of two kinds of wavelength in the process of writing and wiping.Because main optical path need be by all recording layers, institute thinks and avoids interlayer interference that the light beam of two kinds of wavelength should only intersect at the focus place.Two kinds of wavelength be divided into inside and outside two-way, for lens, its inner ring has identical focal length with the outer ring for corresponding wavelength.Effectively equal Jiao of luminous energy of two kinds of wavelength is focused on a bit, just can be implemented in the state of wiping operation and not influencing other measuring point write at focus place.
(3) confocal technology of read output signal
When read operation, when reading signal, be to use the laser of single wavelength, and also this photonic absorption material with fluorescent characteristic, just fluoresce as long as absorb photon, irrelevant with light intensity.Therefore, can send fluorescence equally when the zone that other layers when reading are shone.So just may produce crosstalking of signal.Crosstalk for fear of this, can use a kind of confocal technology.Introduce a baffle plate that has little sky, its position focus lucky and system is in confocal position, and promptly the light that only sends on the focus of system reaches on the detector by this system.Because other zone that is illuminated and since not at the focus place quantum yield of itself add the obstruction of baffle plate the end of with regard to, will be significantly smaller than useful signal.Like this, can avoid crosstalking of adjacent measuring point.
Introduce embodiments of the invention below.
Use three kinds of different wavelength of laser in the native system.Write and be to use short wavelength laser (355nm+590nm) to make medium generation photochemical reaction, molecule becomes state " 1 " from state " 0 ".Use the laser of longer wavelength (590nm) when reading, the molecule that is in state " 1 " can send fluorescence under this wavelength laser irradiation, the molecule that is in state " 0 " then not can, the therefore signal that just can the district office writes of the fluorescent effect of reading medium under the rayed by detection.For the material that fluoresces,, just can avoid molecule state variation to take place reading under the rayed, so this is a kind of nondestructive readout process as long as improve the fluorescence quantum yield of molecule.Owing to need higher energy, therefore need shine (1064nm+590nm) simultaneously when wiping with two-beam.
Claims (1)
1, a kind of multi-layer optical head for 3 D storage is characterized in that, this optical head comprises two laser instruments, a frequency multiplier, two collimation borders, two spectroscopes, an auxiliary collimating mirror, a laser-assisted, object lens and a ganged focus mechanism; Described laser instrument, frequency multiplier, collimating mirror and two spectroscopes are installed with optical axis from left to right, constitute primary optical axis; Object lens, right side spectroscope, auxiliary collimating mirror, laser-assisted are installed with optical axis, and this optical axis and primary optical axis are at an angle of 90; By the read-write disc place object lens with respect to spectroscopical opposite side, described another collimating mirror and another laser instrument are installed with optical axis with the left side spectroscope, this optical axis and primary optical axis at an angle of 90, a formation pair optical axis; Ganged focus mechanism links to each other with two collimating mirrors simultaneously; Laser-assisted produces a secondary laser beams and reads and writes on the primary reflection surface of disc in quilt by auxiliary collimating mirror, spectroscope and object lens focusing, and consequent signal is finished focusing, tracking and tracking; The laser instrument of primary optical axis and pair optical axis generates the laser that is used to wipe needed two kinds of wavelength, and two bundle laser, incide and read and write on the disc by object lens through spectroscopical synthetic, finish and wipe operation; Frequency multiplier is in order to generating a kind of in order in two kinds of wavelength lasers of write operation, by with the laser acting in conjunction that produces by laser instrument, finish write operation; Two collimation lenses in the main optical path are finished the zoom focusing by ganged focus mechanism, realize the selection to writable layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00124422A CN1121030C (en) | 2000-09-01 | 2000-09-01 | Multi-layer optical head for 3D storage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00124422A CN1121030C (en) | 2000-09-01 | 2000-09-01 | Multi-layer optical head for 3D storage |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1281216A true CN1281216A (en) | 2001-01-24 |
| CN1121030C CN1121030C (en) | 2003-09-10 |
Family
ID=4590410
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN00124422A Expired - Fee Related CN1121030C (en) | 2000-09-01 | 2000-09-01 | Multi-layer optical head for 3D storage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1121030C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8004956B2 (en) | 2007-09-28 | 2011-08-23 | Hitachi Media Electronics Co., Ltd. | Optical disc drive, optical pickup and optical component used therefor |
| CN102313541A (en) * | 2011-07-28 | 2012-01-11 | 中国科学院自动化研究所 | Method for controlling laser impact point position based on movable reflector |
| CN105719668A (en) * | 2016-01-18 | 2016-06-29 | 杭州电子科技大学 | Light information storage device based on optical excitation materials and storage method thereof |
-
2000
- 2000-09-01 CN CN00124422A patent/CN1121030C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8004956B2 (en) | 2007-09-28 | 2011-08-23 | Hitachi Media Electronics Co., Ltd. | Optical disc drive, optical pickup and optical component used therefor |
| CN101399059B (en) * | 2007-09-28 | 2012-11-07 | 日立视听媒体股份有限公司 | Optical disc drive, optical pickup and optical component used therefor |
| CN102313541A (en) * | 2011-07-28 | 2012-01-11 | 中国科学院自动化研究所 | Method for controlling laser impact point position based on movable reflector |
| CN102313541B (en) * | 2011-07-28 | 2013-01-02 | 中国科学院自动化研究所 | Method for controlling laser impact point position based on movable reflector |
| CN105719668A (en) * | 2016-01-18 | 2016-06-29 | 杭州电子科技大学 | Light information storage device based on optical excitation materials and storage method thereof |
| CN105719668B (en) * | 2016-01-18 | 2018-11-13 | 杭州电子科技大学 | A kind of optical information memory storage and its storage method based on light stimulus material |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1121030C (en) | 2003-09-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6061322A (en) | Optical storage system having optical head with a solid immersion lens and operating on media with at least two recording layers | |
| US6009065A (en) | Optical pickup for 3-D data storage reading from the multilayer fluorescent optical disk | |
| US7848205B2 (en) | Information-recording medium and optical information-recording/reproducing device | |
| CN86107205A (en) | Optical recording method and device using the method | |
| CN101421784B (en) | Optical information recording and reproducing device | |
| US20070242592A1 (en) | Three-dimensional optical memory | |
| CN113851154B (en) | Method and device for reading information of fluorescent optical disk based on nano photoetching | |
| JPWO2003085657A1 (en) | Information recording medium, manufacturing method thereof, and optical information recording / reproducing apparatus | |
| US8018801B2 (en) | Optical information reproduction device | |
| CN1121030C (en) | Multi-layer optical head for 3D storage | |
| CN101325072A (en) | A double-beam three-dimensional optical disc data reading and writing method | |
| CA2300982A1 (en) | Three-dimensional optical memory with fluorescent photosensitive material | |
| McCormick Jr et al. | Two-photon absorption-based 3D optical memories | |
| Orlic et al. | High-density multilayer recording of microgratings for optical data storage | |
| CN1218254A (en) | Information optical recording or reproducing method and optical recording or reproducing apparatus | |
| CN109524029B (en) | Multilayer optical disc storage device and method based on double beam super-resolution | |
| CN1107945C (en) | 3D multi-colour storing optical head | |
| WO1993021628A1 (en) | Improved optical disk structures for electron trapping optical memory media | |
| CN1142547C (en) | Reader-writer for three-layer multi-order colour DVD | |
| RU99233U1 (en) | DEVICE FOR RECORDING-READING INFORMATION | |
| RU2414012C1 (en) | Apparatus for recording/reading information in multilayer optical disc | |
| Mai et al. | Multiwavelength photochromic storage system and experiment | |
| Milster et al. | Volumetric Bit-Wise Memories | |
| CN119541563A (en) | A super-resolution three-dimensional optical storage focusing servo device and servo method thereof | |
| JP5397108B2 (en) | Multilayer optical recording medium, optical recording medium drive device, and focus pull-in method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |