NO139905B - INFORMATION CARRIER WITH SPIRAL-SHAPED STRUCTURE - Google Patents
INFORMATION CARRIER WITH SPIRAL-SHAPED STRUCTURE Download PDFInfo
- Publication number
- NO139905B NO139905B NO646/72A NO64672A NO139905B NO 139905 B NO139905 B NO 139905B NO 646/72 A NO646/72 A NO 646/72A NO 64672 A NO64672 A NO 64672A NO 139905 B NO139905 B NO 139905B
- Authority
- NO
- Norway
- Prior art keywords
- information carrier
- wavelength
- spiral
- information
- shaped structure
- Prior art date
Links
- 230000005855 radiation Effects 0.000 claims description 6
- 230000035515 penetration Effects 0.000 claims description 2
- 239000002184 metal Substances 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229920002689 polyvinyl acetate Polymers 0.000 description 1
- 239000011118 polyvinyl acetate Substances 0.000 description 1
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
- G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
- G11B7/005—Reproducing
-
- 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
- G11B7/007—Arrangement of the information on the record carrier, e.g. form of tracks, actual track shape, e.g. wobbled, or cross-section, e.g. v-shaped; Sequential information structures, e.g. sectoring or header formats within a track
- G11B7/013—Arrangement of the information on the record carrier, e.g. form of tracks, actual track shape, e.g. wobbled, or cross-section, e.g. v-shaped; Sequential information structures, e.g. sectoring or header formats within a track for discrete information, i.e. where each information unit is stored in a distinct discrete location, e.g. digital information formats within a data block or sector
-
- 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
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Recording Or Reproduction (AREA)
- Optical Head (AREA)
- Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
- Optical Record Carriers And Manufacture Thereof (AREA)
Description
Oppfinnelsen angår en informasjonsbærer med spiralformet struktur, i hvilken er lagret lyd- og/eller bildeinfor-mas jon i form av frekvens- eller fasemodulerte signaler som er avlesbare ved hjelp av en strålebunt, hvor strukturen er dannet av små blokker med foranderlig lengde som ligger i et samme første plan og er atskilt av områder med foranderlig lengde og som likeledes ligger i et samme andre plan. The invention relates to an information carrier with a spiral-shaped structure, in which audio and/or image information is stored in the form of frequency- or phase-modulated signals that can be read using a beam beam, where the structure is formed by small blocks of variable length that lie in the same first plane and are separated by areas of variable length which likewise lie in the same second plane.
Informasjonsbæreren av den ovenfor nevnte art er The information carrier of the above-mentioned kind is
kjent. Den kjente informasjonsbærer har et spiralformet spor hvis bunn har en bølgeformet profil. Selv om man ved gjengiv-else av den kjente informasjonsbærer anvender den vanlige grammofonplateteknikk, er fremstillingen av den første informasjonsbærer meget omstendelig og tidskrevende. Informasjonen lagres i form av spor som bare kan fremstilles ved -hjelp av mekanisk bearbeidelse. Ved detektering av den i informasjonsbæreren lagrede informasjon spiller vinkelen som overflaten av det bølgeformede spor danner med informasjonsbærerens plan en vesentlig rolle. Dessuten er materialet mellom etter hverandre følgende spor av vesentlig betydning ved bearbeidelsen av et etterfølgende spor. Dette gjør det nødvendig at det tilveie-bringes en komplisert tredimensjonal profil på informasjonsbæreren . known. The known information carrier has a spiral groove, the bottom of which has a wavy profile. Even if the usual gramophone record technique is used when reproducing the known information carrier, the production of the first information carrier is very laborious and time-consuming. The information is stored in the form of traces that can only be produced with the help of mechanical processing. When detecting the information stored in the information carrier, the angle which the surface of the wave-shaped track forms with the plane of the information carrier plays a significant role. Moreover, the material between successive tracks is of significant importance when processing a subsequent track. This makes it necessary to provide a complicated three-dimensional profile on the information carrier.
Fra DAS 1.537-1^1 er det kjent en opptegningsbærer A record carrier is known from DAS 1.537-1^1
som har en spiralformet struktur av blokklignende forhøyninger med fordypende områder mellom seg. Forhøyningene er belagt med metall 13 som fullstendig reflekterer innfallende lys mens for-dypningene slipper lys gjennom fullt ut. Hele lysbunten blir altså reflektert (metallbelegget) eller sluppet gjennom (for-dypningene). Det er da uten interesse hvor, sett i aksial retning (altså vinkelrett på overflaten av opptegningsbæreren) which has a spiral structure of block-like elevations with deepening areas between them. The elevations are coated with metal 13, which completely reflects incident light, while the depressions let light through completely. The entire light beam is thus reflected (the metal coating) or let through (the recesses). It is then of no interest where, seen in the axial direction (i.e. perpendicular to the surface of the recording medium)
overflaten av de transparente fordypninger befinner seg i forhold til overflaten av metallbelegget. Høyden av blokkene er derfor uvesentlig. Den kjente struktur kan betraktes som en amplitude-struktur. the surface of the transparent recesses is in relation to the surface of the metal coating. The height of the blocks is therefore immaterial. The known structure can be considered an amplitude structure.
Fra tysk patentskrift nr. I.I85.233 er det kjent en optisk-elektronisk omformer hvor informasjonen skal foreligge i binært kodet form. Videre gir dette ut over de ubestemte angivelser av "tykkelsesmodulert" resp. "tykkelsesforskjell av lagringsmediet" (spalte 2, linje 35), ingen konkrete anvisninger på en bestemt utforming av opptegningsbæreren resp. særlig informasjonssporene. Videre fremgår at de binært kodede informasjonselementer har samme lengde. Modulasjonsdybden av-lysstyrken ved den kjente anordning er ubestemt fordi det ikke er tale om tykkelsen av den meanderformede overflate av opptegningsbæreren. Denne modulasjonsdybde kan derfor bare være noen prosent. From German patent document No. I.I85.233 an optical-electronic converter is known where the information must be present in binary coded form. Furthermore, this gives beyond the indefinite indications of "thickness modulated" resp. "thickness difference of the storage medium" (column 2, line 35), no specific instructions on a specific design of the recording medium or especially the information tracks. Furthermore, it appears that the binary coded information elements have the same length. The modulation depth of the brightness in the known device is undetermined because it is not a matter of the thickness of the meander-shaped surface of the recording medium. This modulation depth can therefore only be a few percent.
Hensikten med oppfinnelsen er å tilveiebringe en opptegningsbærer av den innledningsvis nevnte art, som ikke har de ovenfor nevnte ulemper og som har fasestruktur og en modulasjonsdybde på nesten 100%. The purpose of the invention is to provide a recording medium of the type mentioned at the outset, which does not have the above-mentioned disadvantages and which has a phase structure and a modulation depth of almost 100%.
Dette oppnås ifølge oppfinnelsen ved at blokkene og områdene har samme refleksjons- eller gjennomtrengningskoef-fisienter og dimensjoner i størrelsesorden av strålebuntens bølgelengde, og at avstanden mellom de to plan ved reflektert stråling er tilnærmet en kvart bølgelengde eller ved gjennomgående stråling tilnærmet én bølgelengde. This is achieved according to the invention by the blocks and areas having the same reflection or penetration coefficients and dimensions in the order of magnitude of the beam's wavelength, and that the distance between the two planes in the case of reflected radiation is approximately a quarter of a wavelength or in the case of transmitted radiation approximately one wavelength.
Et utførelseseksempel på oppfinnelsen skal forklares nærmere under henvisning til tegningen. An embodiment of the invention will be explained in more detail with reference to the drawing.
Fig. 1 viser henholdsvis i grunnriss og tverrsnitt Fig. 1 shows respectively in plan and cross-section
en informasjonsbærer ifølge oppfinnelsen. an information carrier according to the invention.
Informasjonsbæreren 1 på fig. la har en spiralformet struktur med et antall øyensynlig konsentriske spor. Disse spor er på fig. 1 vist konsentriske. Bare en del av to etter hverandre følgende spor 12,13 er vist på figuren. Hvert spor inneholder en firkantstruktur hvis dimensjoner på fig. lb er sterkt overdrevet. Avstanden mellom oversidene 3 og 5 og 5 og 7 av firkantene er forskjøvet fra hverandre like meget som deres lengde. Avstand og lengde blir derved bestemt av de i sporene lagrede informasjoner. Høydene 4, 6, 8 osv. av firkantene er like og tilsvarer med hensyn til'gjennomtrengelighet fortrinns-vis en bølgelengde av den stråling ved hjelp av hvilken informasjonsbæreren avsøkes. Hvis det er tale om refleksjon, tilsvarer høyden en fjerdedels bølgelengde av strålingen ved hjelp av hvilken informasjonen avsøkes. The information carrier 1 in fig. la has a helical structure with a number of apparently concentric grooves. These tracks are in fig. 1 shown concentric. Only a part of two consecutive tracks 12,13 is shown in the figure. Each slot contains a square structure whose dimensions in fig. lb is greatly exaggerated. The distance between the upper sides 3 and 5 and 5 and 7 of the squares are offset from each other by as much as their length. Distance and length are thereby determined by the information stored in the tracks. The heights 4, 6, 8, etc. of the squares are equal and, with regard to permeability, preferably correspond to a wavelength of the radiation by means of which the information carrier is scanned. If it is a reflection, the height corresponds to a quarter of the wavelength of the radiation by means of which the information is scanned.
Informasjonsbæreren består f.eks. av polyvinylacetat. Avstanden mellom sporene er f.eks. M^um, mens den minste periode i hvert spor f.eks. er 2,5/um. Informasjonsbæreren roteres med en hastighet på f.eks. 1500 omdreininger/min. om sin akse 0. En pil betegner bevegelsesretningen. The information carrier consists of e.g. of polyvinyl acetate. The distance between the tracks is e.g. M^um, while the smallest period in each track e.g. is 2.5/µm. The information carrier is rotated at a speed of e.g. 1500 revolutions/min. about its axis 0. An arrow denotes the direction of movement.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NO751183A NO141672C (en) | 1971-03-04 | 1975-04-07 | DEVICE FOR READING AN INFORMATION BEAR WITH SPECIAL SHAPED STRUCTURE |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL7102863A NL7102863A (en) | 1971-03-04 | 1971-03-04 |
Publications (2)
Publication Number | Publication Date |
---|---|
NO139905B true NO139905B (en) | 1979-02-19 |
NO139905C NO139905C (en) | 1979-05-30 |
Family
ID=19812612
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NO646/72A NO139905C (en) | 1971-03-04 | 1972-03-01 | INFORMATION CARRIER WITH SPIRAL-SHAPED STRUCTURE |
Country Status (15)
Country | Link |
---|---|
JP (2) | JPS544603B1 (en) |
AR (2) | AR195275A1 (en) |
AT (1) | AT342122B (en) |
AU (1) | AU470672B2 (en) |
BE (1) | BE780146A (en) |
BR (1) | BR7201206D0 (en) |
CA (1) | CA1023855A (en) |
CH (2) | CH552920A (en) |
ES (1) | ES400336A1 (en) |
FR (1) | FR2128576B1 (en) |
GB (1) | GB1391541A (en) |
IT (1) | IT952884B (en) |
NL (1) | NL7102863A (en) |
NO (1) | NO139905C (en) |
ZA (1) | ZA721137B (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2197495A5 (en) * | 1972-08-25 | 1974-03-22 | Thomson Csf | |
NL7212015A (en) * | 1972-09-04 | 1974-03-06 | ||
FR2235354A1 (en) * | 1973-06-29 | 1975-01-24 | Thomson Csf | Photoelectric optical test sensor - measures displacement of a diffraction screen with constant spacing in the test sensor plane |
NL7611567A (en) * | 1976-10-20 | 1978-04-24 | Philips Nv | METHOD OF MAKING COPIES OF TRACKS OF INFORMATION ON CARRIERS. |
BE871326A (en) * | 1978-10-23 | 1979-04-17 | Mca Disco Vision | METHOD AND DEVICE FOR RECORDING AND REPRODUCING A VIDEO SIGNAL. |
-
1971
- 1971-03-04 NL NL7102863A patent/NL7102863A/xx not_active Application Discontinuation
-
1972
- 1972-02-21 ZA ZA721137A patent/ZA721137B/en unknown
- 1972-02-29 AU AU39454/72A patent/AU470672B2/en not_active Expired
- 1972-03-01 CH CH509273A patent/CH552920A/en not_active IP Right Cessation
- 1972-03-01 AT AT166672A patent/AT342122B/en not_active IP Right Cessation
- 1972-03-01 GB GB948772A patent/GB1391541A/en not_active Expired
- 1972-03-01 NO NO646/72A patent/NO139905C/en unknown
- 1972-03-01 BR BR1206/72*[A patent/BR7201206D0/en unknown
- 1972-03-01 JP JP2068372A patent/JPS544603B1/ja active Pending
- 1972-03-01 CH CH298372A patent/CH553522A/en not_active IP Right Cessation
- 1972-03-01 IT IT67654/72A patent/IT952884B/en active
- 1972-03-02 CA CA136,033A patent/CA1023855A/en not_active Expired
- 1972-03-02 BE BE780146A patent/BE780146A/en not_active IP Right Cessation
- 1972-03-02 ES ES400336A patent/ES400336A1/en not_active Expired
- 1972-03-03 AR AR240808A patent/AR195275A1/en active
- 1972-03-03 FR FR7207419A patent/FR2128576B1/fr not_active Expired
-
1973
- 1973-03-28 AR AR247284A patent/AR203718A1/en active
-
1978
- 1978-08-11 JP JP9746078A patent/JPS5452504A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
FR2128576B1 (en) | 1980-03-14 |
AT342122B (en) | 1978-03-10 |
AR195275A1 (en) | 1973-09-28 |
JPS5452504A (en) | 1979-04-25 |
CH553522A (en) | 1974-08-30 |
NL7102863A (en) | 1972-09-06 |
FR2128576A1 (en) | 1972-10-20 |
BR7201206D0 (en) | 1973-06-07 |
BE780146A (en) | 1972-09-04 |
ES400336A1 (en) | 1975-06-16 |
AU3945472A (en) | 1973-08-30 |
IT952884B (en) | 1973-07-30 |
JPS544603B1 (en) | 1979-03-08 |
CH552920A (en) | 1974-08-15 |
NO139905C (en) | 1979-05-30 |
AU470672B2 (en) | 1973-08-30 |
JPS5732409B2 (en) | 1982-07-10 |
CA1023855A (en) | 1978-01-03 |
AR203718A1 (en) | 1975-10-15 |
ATA166672A (en) | 1977-07-15 |
DE2208379B2 (en) | 1976-10-28 |
GB1391541A (en) | 1975-04-23 |
ZA721137B (en) | 1973-10-31 |
DE2208379A1 (en) | 1972-09-14 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP1067535A9 (en) | Information recording medium | |
JPH038020B2 (en) | ||
GB2091028A (en) | Optically readable record carrier | |
WO2004021339A1 (en) | Hologram recording/reproducing device and hologram recording medium | |
US4359750A (en) | Optical disc structure | |
US5946287A (en) | Optical disk having pits with push-pull signal of opposite polarity to that of guide grooves | |
US4852076A (en) | Optical information recording and reproducing disc employing a film having thermally changeable optical characteristics | |
NO139905B (en) | INFORMATION CARRIER WITH SPIRAL-SHAPED STRUCTURE | |
US4233626A (en) | Playback information record using phase cancellation for reading | |
US4270132A (en) | Information record | |
CN104347090A (en) | Reproducing apparatus and reproducing method | |
NO792922L (en) | RECORD BEARING WHERE INFORMATION IS STORED IN A RADIATION REFLECTING INFORMATION STRUCTURE READABLE WITH AN OPTICAL RADIATION | |
FR2473771A1 (en) | DEVICE FOR REPRODUCING DIGITALLY CODE-CODED INFORMATION RECORDED ON OPTICALLY OPTICALLY EXPLOITED DISK-SHAPED INFORMATION CARRIER | |
CN1183520C (en) | Optical record medium capable of recording in ridge and valley | |
JP2006127636A (en) | Multilayered optical recording medium, and method for evaluating optical recording system | |
JPS63107589A (en) | Optical recording medium | |
JPS6352347A (en) | Information recording body for reproducer | |
KR20040094896A (en) | Optical data storage medium and use of such medium | |
CN100397488C (en) | Optical disk medium and driver system | |
Clay et al. | On the existence of bottom corrugations in the Blake‐Bahama Basin | |
JPS6313144A (en) | Optical recording disk with guide groove | |
JP2000504465A (en) | Optical recording medium | |
JP2013064722A5 (en) | ||
JPS6364647A (en) | Optical disk | |
US8045427B2 (en) | Apparatus for optical pick-up |