DE3538424A1 - AS OPTICAL SWITCH OR INFORMATION STORE USED DEVICE - Google Patents
AS OPTICAL SWITCH OR INFORMATION STORE USED DEVICEInfo
- Publication number
- DE3538424A1 DE3538424A1 DE19853538424 DE3538424A DE3538424A1 DE 3538424 A1 DE3538424 A1 DE 3538424A1 DE 19853538424 DE19853538424 DE 19853538424 DE 3538424 A DE3538424 A DE 3538424A DE 3538424 A1 DE3538424 A1 DE 3538424A1
- Authority
- DE
- Germany
- Prior art keywords
- single crystal
- laser
- radiation
- information store
- light source
- 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.)
- Withdrawn
Links
Classifications
-
- 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
- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
- G11B7/242—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers
- G11B7/243—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising inorganic materials only, e.g. ablative layers
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/0009—Materials therefor
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/0126—Opto-optical modulation, i.e. control of one light beam by another light beam, not otherwise provided for in this subclass
-
- 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
-
- 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
- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
- G11B7/242—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers
- G11B7/243—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising inorganic materials only, e.g. ablative layers
- G11B2007/24302—Metals or metalloids
- G11B2007/24304—Metals or metalloids group 2 or 12 elements (e.g. Be, Ca, Mg, Zn, Cd)
-
- 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
- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
- G11B7/242—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers
- G11B7/243—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising inorganic materials only, e.g. ablative layers
- G11B2007/24302—Metals or metalloids
- G11B2007/24306—Metals or metalloids transition metal elements of groups 3-10
-
- 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
- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
- G11B7/242—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers
- G11B7/243—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising inorganic materials only, e.g. ablative layers
- G11B2007/24318—Non-metallic elements
- G11B2007/2432—Oxygen
-
- 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
- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
- G11B7/242—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers
- G11B7/243—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising inorganic materials only, e.g. ablative layers
- G11B2007/24318—Non-metallic elements
- G11B2007/24322—Nitrogen
-
- 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
- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
- G11B7/242—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers
- G11B7/243—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising inorganic materials only, e.g. ablative layers
- G11B2007/24318—Non-metallic elements
- G11B2007/24328—Carbon
Description
Die Erfindung bezieht sich auf einen optischen Schalter bzw. Informationsspeicher, bestehend aus einem Nitrosylprussiat-Einkristall, einer Lichtquelle zur Erzeugung von Strahlung zum Pumpen und Ablesen der zu bestrahlenden bzw. bestrahlten Orte des Einkristalls einer Einrichtung zur Ausrichtung der Strahlung zur ortsaufgelösten Bestrahlung des Ein kristalls sowie einem Photodetektor zur Zählung der von den Orten des Einkristalls ausgehenden Photonen.The invention relates to an optical Switch or information store, consisting from a nitrosyl prussiate single crystal, a light source for generating radiation for pumping and reading the radiation to be irradiated or irradiated locations of the single crystal a device for aligning the radiation for spatially resolved irradiation of the Ein crystals as well as a photodetector Counting of the locations of the single crystal outgoing photons.
Der sog. "Optische Computer" ist derzeit Gegenstand von Forschung und Entwicklung. Es gelang jedoch bisher nicht, ein als Speichermedium geeignetes Material zu ent wickeln, das den Durchbruch des optischen Computers ermöglicht hätte.The so-called "optical computer" is currently Subject of research and development. So far, however, it has not been possible to use a Storage medium suitable material ent wrap that the breakthrough of the optical Computers would have enabled.
Aus Physical Review Letters, Vol. 53, No. 18, 29. October 1984, ist es bekannt, daß Na2/Fe(CN) · 2H2O-Einkristalle bei Temperaturen unter 160°K durch Strahlen eine Wellenlänge von 400 bis 540 nm in einen langlebigen metastabilen Zustand versetzt werden. Bei Temperaturen oberhalb von 160°K und durch Bestrahlung mit rotem Licht wird der meta stabile Zustand wieder abgebaut.From Physical Review Letters, Vol. 53, No. 18, October 29, 1984, it is known that Na 2 / Fe (CN) .2H 2 O single crystals are brought into a long-lived metastable state by radiation with a wavelength of 400 to 540 nm at temperatures below 160 ° K. At temperatures above 160 ° K and by irradiation with red light, the meta stable state is broken down again.
Es ist Aufgabe der Erfindung, einen optischen Schalter bzw. Informationsspeicher zu schaffen, der einen bei einer höheren Temperatur als 160°K hierfür einsetzbaren Einkristall aufweist und der zumindest in Teilbereichen der Technik anwendbar ist.It is an object of the invention to provide an optical To create switches or information stores, the one at a higher temperature as 160 ° K single crystal that can be used for this has and at least in some areas the technology is applicable.
Die der Erfindung zugrundeliegende Aufgabe wird durch einen optischen Schalter bzw. Informationsspeicher mit den Merkmalen gemäß Anspruch 1 gelöst.The object underlying the invention is activated by an optical switch or Information store with the characteristics solved according to claim 1.
Wie sich überraschenderweise gezeigt hat, reicht bei einem Ba/Fe(CN)₅NO/nH₂O-Einkristall eine Kühlung bis auf 200°K aus, um ihn ortsaufgelöst in den metastabilen Zustand transformieren zu können.As has surprisingly been shown is sufficient for a Ba / Fe (CN) ₅NO / nH₂O single crystal cooling down to 200 ° K from him spatially resolved to the metastable state to be able to transform.
Die Transformation bzw. das "Pumpen" des Einkristalls in den metastabilen Zustand erfolgt selektiv mit Strahlung der in Anspruch 1 angegebenen WellenIänge. Die Rücktransformation in den ursprünglichen Zustand - den Zustand 0 - bzw. das Löschen erfolgt selektiv mit rotem Licht der angegebenen Wellenlänge. Die Transformation zwischen beiden Zuständen (Zustand 0 und Zustand 1) ist reversibel und beliebig oft wiederholbar, wobei die Schnelligkeit der Vorgänge aller Wahrschein lichkeit nach im Bereich von 10-12 Sek. (Kernschwingungen) liegt.The transformation or the "pumping" of the single crystal into the metastable state takes place selectively with radiation of the wavelengths specified in claim 1. The transformation back to the original state - state 0 - or the deletion takes place selectively with red light of the specified wavelength. The transformation between the two states (state 0 and state 1 ) is reversible and can be repeated as often as required, the speed of the processes in all likelihood being in the range of 10 -12 seconds (core vibrations).
Der bestrahlte, in den Zustand 1 versetzte Ort des Einkristalls weist eine geringere Transmission für die angewendete Strahlung auf als im ursprünglichen Zustand, d.h.The irradiated location of the single crystal set to state 1 has a lower transmission for the radiation used than in the original state, ie
im Zustand 0. Dies ergibt die Möglichkeit, anhand der Zahl der transmittierten oder auch rückgestreuten Photonen den ortsaufge lösten Zustand zu erkennen.in state 0 . This gives the possibility of recognizing the spatially resolved state from the number of transmitted or backscattered photons.
Die Vorrichtung gemäß der Erfindung kann wahIweise als schneller Schalter oder als Informationsspeicher mit beliebiger Speicher zeit eingesetzt werden, je nachdem, ob die gespeicherte Information computergesteuert unmittelbar nach der Speicherung oder erst nach längerer Zeit abgelesen wird.The device according to the invention can either as a quick switch or as Information store with any memory time, depending on whether the stored information is computer controlled immediately after saving or only is read after a long time.
Die Vorgänge der Transformation und Rücktrans formation sind unabhängig von der Dimensionierung des Einkristalls. Für den Fall jedoch, daß dem Einkristall der Photodetektor nachge schaltet ist, hat der Einkristall zweckmäßi gerweise die Form einer dünnen Scheibe, wobei die Dicke dieser Scheibe etwa 0,05-0,2 mm beträgt.The processes of transformation and backtrans formation are independent of the dimensioning of the single crystal. In the event, however, that nachge the single crystal photodetector is switched, the single crystal has expediently sometimes in the form of a thin disc, the thickness of this disc being about 0.05-0.2 mm is.
Bei Verwendung eines solchen Einkristalls ist es möglich, den Zustand des Einkristalls am Ort anhand der Transmission der Strahlung, d.h. der Zahl der den Einkristall am Ort verlassenden Photonen mittels des dem Ein kristall nachgeschalteten Photodetektors zu messen.When using such a single crystal it is possible to determine the state of the single crystal locally based on the transmission of radiation, i.e. the number of the single crystal in place leaving photons by means of the one crystal-connected photodetector to eat.
Eine zweckmäßige Ausführungsart des Schalters bzw. Informationsspeichers gemäß der Erfindung besteht darin, daß die Lichtquelle aus zwei Lasern besteht, die eine Leistung von einigen mW aufweisen. Der eine Laser, der eine Strahlung mit der Wellenlänge λ₁ emittiert, dient dann zum ortsaufgelösten Pumpen des Ein kristalls, während der andere, der die Strahlung mit der Wellenlänge λ₂ emittiert, zum orts aufgelösten Ablesen des Einkristalls eingesetzt wird. Dabei ist ferner zweckmäßig, daß die Laser als Pulslaser ausgebildet sind. Die Transformation in den metastabilen Zustand 1 erfolgt dann mittels eines Pulses, während dessen der Photodektor ausgeschaltet sein kann. Entsprechend erfolgt die Ablesung ebenfalls mittels eines Pulses.An expedient embodiment of the switch or information store according to the invention is that the light source consists of two lasers which have an output of a few mW. One laser, which emits radiation with the wavelength λ 1, is then used for spatially resolved pumping of the single crystal, while the other, which emits the radiation with the wavelength λ 2, is used for spatially resolved reading of the single crystal. It is also expedient that the lasers are designed as pulse lasers. The transformation into metastable state 1 then takes place by means of a pulse during which the photodector can be switched off. Accordingly, the reading is also carried out by means of a pulse.
Eine Ausführungsart der Vorrichtung ist in der Zeichnung schematisch dargestellt und wird im folgenden näher erläutert:One embodiment of the device is shown schematically in the drawing and is explained in more detail below:
Der Schalter bzw. Informationsspeicher besteht aus einem Ba/Fe(CN)₅NO/nH₂O-Einkristall 1, auf den Strahlen eines Lasers I und eines Lasers II mit einer Leistung von jeweils einigen mW über die Laserspiegel 2 und 3 gerichtet sind. Mittels einer in der Zeichnung nicht dargestellten Computer steuerung werden die Laserspiegel 2 und 3 so bewegt, daß die Strahlen die Oberfläche des Einkristalls nach einem vorgegebenen Programm erreichen. Die gepulste Strahlung des Lasers I hat die Wellenlänge λ₁. Am jeweils vom Puls getroffenen Ort des Ein kristalls 1 wird dadurch der metastabile Zustand 1 erzeugt. Der Photodetektor bzw. die dem jeweils getroffenen Ort des Ein kristalls entsprechenden Dioden werden zweckmäßigerweise während des Pulses ausgeschaltet. The switch or information store consists of a Ba / Fe (CN) ₅NO / nH₂O single crystal 1 , on the beams of a laser I and a laser II with a power of a few mW each are directed via the laser mirrors 2 and 3 . Using a computer control, not shown in the drawing, the laser mirrors 2 and 3 are moved so that the beams reach the surface of the single crystal according to a predetermined program. The pulsed radiation of the laser I has the wavelength λ ₁. At the point hit by the pulse of a crystal 1 , the metastable state 1 is thereby generated. The photodetector or the respective location of the one crystal corresponding diodes are expediently switched off during the pulse.
Je nach der Intensität der Laserpulse werden auf diese Weise Informationen im Einkristall gespeichert.Depending on the intensity of the laser pulses this way information in single crystal saved.
Zum Ablesen der Informationen bzw. zum Schalten werden Pulse des Lasers II mit der Wellenlänge λ₂ über den Laserspiegel 3, der ebenfalls computergesteuert bewegbar ist, auf die Orte des Einkristalls gerichtet. In Abhängigkeit vom Zustand der Orte werden dabei über das Linsensystem 4 Photonenstrahlen auf entsprechende Dioden des Photodetektors 5 gerichtet. Dabei werden zugleich die metasta bilen Zustände 1 in die Zustände 0 transformiert.To read the information or to switch, pulses of laser II with the wavelength λ ₂ are directed via the laser mirror 3 , which can also be moved under computer control, to the locations of the single crystal. Depending on the state of the locations, 4 photon beams are directed onto corresponding diodes of the photodetector 5 via the lens system. At the same time, metastable states 1 are transformed into states 0 .
Die vom Photodetektor 5 erhaltenen Signale werden einer in der Zeichnung nicht dargestell ten Einrichtung zur Weiterverarbeitung der Signale (Datenverarbeitung, bildliche Darstellung der Informationen u.a.) zugeleitet.The signals received by the photodetector 5 are fed to a device (not shown in the drawing) for further processing of the signals (data processing, visual representation of the information, etc.).
Claims (4)
- - daß der Einkristall ein Ba/Fe(CN)₅NO/nH₂O- Einkristall (1) ist,
- - daß die Lichtquelle eine Strahlung mit einer Wellenlänge λ₁ von 430 bis 510 nm zum Pumpen erzeugt,
- - daß die Lichtquelle eine Strahlung mit einer Wellenlänge λ₂ von 600 bis 660 nm zum Ablesen erzeugt und
- - daß eine Einrichtung zum Kühlen des Einkristalls auf eine Temperatur im Bereich von 200°K vorgesehen ist.
- - That the single crystal is a Ba / Fe (CN) ₅NO / nH₂O single crystal ( 1 ),
- - That the light source generates radiation with a wavelength λ ₁ of 430 to 510 nm for pumping,
- - That the light source generates radiation with a wavelength λ ₂ of 600 to 660 nm for reading and
- - That a device for cooling the single crystal to a temperature in the range of 200 ° K is provided.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19853538424 DE3538424A1 (en) | 1985-10-29 | 1985-10-29 | AS OPTICAL SWITCH OR INFORMATION STORE USED DEVICE |
| FR8613805A FR2589256A1 (en) | 1985-10-29 | 1986-10-03 | SWITCH OR OPTICAL MEMORY FOR INFORMATION |
| JP61249786A JPS62105124A (en) | 1985-10-29 | 1986-10-22 | Optical switch and information memory |
| GB08625767A GB2182455A (en) | 1985-10-29 | 1986-10-28 | Optical switch or information store |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19853538424 DE3538424A1 (en) | 1985-10-29 | 1985-10-29 | AS OPTICAL SWITCH OR INFORMATION STORE USED DEVICE |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE3538424A1 true DE3538424A1 (en) | 1987-04-30 |
Family
ID=6284724
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19853538424 Withdrawn DE3538424A1 (en) | 1985-10-29 | 1985-10-29 | AS OPTICAL SWITCH OR INFORMATION STORE USED DEVICE |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPS62105124A (en) |
| DE (1) | DE3538424A1 (en) |
| FR (1) | FR2589256A1 (en) |
| GB (1) | GB2182455A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63272092A (en) * | 1987-04-30 | 1988-11-09 | Yoshiaki Arata | Forming method for superpowered composite laser beam |
| JP4924816B2 (en) * | 2007-02-15 | 2012-04-25 | 新神戸電機株式会社 | Storage battery packaging |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4166254A (en) * | 1977-10-03 | 1979-08-28 | Bell Telephone Laboratories, Incorporated | Switched diffraction grating |
| JPS60247841A (en) * | 1984-05-23 | 1985-12-07 | Seiko Epson Corp | Disk for optical memory |
-
1985
- 1985-10-29 DE DE19853538424 patent/DE3538424A1/en not_active Withdrawn
-
1986
- 1986-10-03 FR FR8613805A patent/FR2589256A1/en active Pending
- 1986-10-22 JP JP61249786A patent/JPS62105124A/en active Pending
- 1986-10-28 GB GB08625767A patent/GB2182455A/en not_active Withdrawn
Non-Patent Citations (1)
| Title |
|---|
| Phys.Rev.Lett. 53(1984)18 S. 1767-1770 * |
Also Published As
| Publication number | Publication date |
|---|---|
| GB8625767D0 (en) | 1986-12-03 |
| FR2589256A1 (en) | 1987-04-30 |
| JPS62105124A (en) | 1987-05-15 |
| GB2182455A (en) | 1987-05-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE102017101223B4 (en) | Machine learning device for learning light output command data which contain a light output command to be output to a laser power supply unit at the start of processing, laser device with a machine learning device and associated machine learning methods | |
| DE2803121C3 (en) | Optical data storage device | |
| DE2403013B2 (en) | DISC-SHAPED RECORDERING CARRIER | |
| DE3227654C2 (en) | ||
| DE2309106B2 (en) | Method for optical information storage and device for carrying out the method | |
| DE2951215A1 (en) | DEVICE FOR RECORDING INFORMATION | |
| DE10162222A1 (en) | Optical test system for testing integrated circuits via optical coupling uses a device under test to hold an optical fibre in optical alignment by applying an alignment holder | |
| DE2522032A1 (en) | METHOD AND DEVICE FOR ALIGNING REFLECTIVE SURFACES IN LASERS | |
| DE3804452C2 (en) | Device for recording and reproducing information on or from an optical disc | |
| DE2812956A1 (en) | DEVICE FOR VISIBLE DEFORMATIONS OF DEFORMABLE STRUCTURES BY HOLOGRAPHIC INTERFEROMETRY | |
| DE1816606A1 (en) | Optical storage device | |
| DE3538424A1 (en) | AS OPTICAL SWITCH OR INFORMATION STORE USED DEVICE | |
| DE2802594A1 (en) | ARRANGEMENT FOR NON-DESTRUCTIVE READING OF A HOLOGRAPHIC MEMORY | |
| DE60318131T2 (en) | A method of recording information on an optical recording medium, information recording device and optical recording medium | |
| DE2164725B2 (en) | Optical data storage | |
| DE2548123A1 (en) | PROCEDURES AND EQUIPMENT FOR INDEXING AND RECOVERY OF DATA | |
| DE2101048C3 (en) | Optical readout process and device for carrying out the process | |
| DE60120002T2 (en) | Three-dimensional optical storage medium and method for its production | |
| DE3722100C2 (en) | ||
| DE102017126291A1 (en) | Device for generating a laser radiation | |
| DE2913778A1 (en) | DEVICE FOR RECORDING INFORMATION | |
| DE112019005450T5 (en) | Laser machining process | |
| DE2408010A1 (en) | DEVICE FOR OPTICAL STORAGE AND READING OF BINARY INFORMATION | |
| DE1774471B2 (en) | Process for optical storage and arrangement for performing the process s | |
| Alfano | Interaction of picosecond laser pulses with matter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| OP8 | Request for examination as to paragraph 44 patent law | ||
| 8136 | Disposal/non-payment of the fee for publication/grant |