NL7206377A - - Google Patents
Info
- Publication number
- NL7206377A NL7206377A NL7206377A NL7206377A NL7206377A NL 7206377 A NL7206377 A NL 7206377A NL 7206377 A NL7206377 A NL 7206377A NL 7206377 A NL7206377 A NL 7206377A NL 7206377 A NL7206377 A NL 7206377A
- Authority
- NL
- Netherlands
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/40—Optical focusing aids
-
- 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
- G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
- G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
- G11B7/0908—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for focusing only
-
- 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
- G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
- G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
- G11B7/0908—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for focusing only
- G11B7/0916—Foucault or knife-edge methods
-
- 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
- G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
- G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
- G11B7/0908—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for focusing only
- G11B7/0917—Focus-error methods other than those covered by G11B7/0909 - G11B7/0916
-
- 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
- G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
- G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
- G11B7/0908—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for focusing only
- G11B7/0917—Focus-error methods other than those covered by G11B7/0909 - G11B7/0916
- G11B2007/0924—Skewed beams methods (using an angled beam, i.e. a beam which is reflected from the disc at an angle different from 90°)
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
Priority Applications (22)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL7206377.A NL159844B (nl) | 1972-05-11 | 1972-05-11 | Inrichting voor het uitlezen van een vlakke stralingsre- flecterende registratiedrager. |
AR247988A AR205243A1 (es) | 1972-05-11 | 1973-01-01 | Aparato para la lectura de un portador de grabacion reflector plano |
ZA733044A ZA733044B (en) | 1972-05-11 | 1973-05-04 | Apparatus for reading a flat reflecting record carrier |
DE19732322725 DE2322725C3 (de) | 1973-04-19 | 1973-05-05 | Vorrichtung zum Auslesen eines flachen reflektierenden Aufzeichnungsträgers |
CA170,625A CA1017858A (en) | 1972-05-11 | 1973-05-08 | Apparatus for reading a flat reflecting record carrier |
GB2190273A GB1435922A (en) | 1972-05-11 | 1973-05-08 | Reading optical recordings |
CH653073A CH572247A5 (un) | 1972-05-11 | 1973-05-08 | |
DK252773AA DK133838B (da) | 1972-05-11 | 1973-05-08 | Apparat til aflæsning af en flad, reflekterende registreringsbærer. |
SE7306438A SE401415B (sv) | 1972-05-11 | 1973-05-08 | Apparat for avlesning av en plan reflekterande uppteckningsberare |
IT68300/73A IT985879B (it) | 1972-05-11 | 1973-05-08 | Apparecchio per leggere un sopporto di registrazioni piatto e rifletten te |
NO1897/73A NO141136C (no) | 1972-05-11 | 1973-05-08 | Anordning for avlesning av en plan reflekterende opptegningsbaerer |
FR7316690A FR2183992B1 (un) | 1972-05-11 | 1973-05-09 | |
AU55431/73A AU480297B2 (en) | 1972-05-11 | 1973-05-09 | Apparatus for reading a flat reflecting record carrier |
BE130949A BE799335A (fr) | 1972-05-11 | 1973-05-09 | Dispositif pour la lecture d'un support d'enregistrement reflecteur plan, |
ES414590A ES414590A1 (es) | 1972-05-11 | 1973-05-09 | Aparato para leer un portador de registro reflectante pla- no. |
AT411873A AT323820B (de) | 1972-05-11 | 1973-05-10 | Vorrichtung zum auslesen von informationen |
CS3321A CS170508B2 (un) | 1972-05-11 | 1973-05-10 | |
PL1973162459A PL86214B1 (un) | 1972-05-11 | 1973-05-10 | |
YU1234/73A YU35404B (en) | 1972-05-11 | 1973-05-10 | Apparatus for reading a flat record carrier |
US358994A US3876841A (en) | 1972-05-11 | 1973-05-10 | Apparatus for reading a flat reflecting record carrier with autofocusing means |
JP5246873A JPS5325481B2 (un) | 1972-05-11 | 1973-05-11 | |
BR3455/73A BR7303455D0 (pt) | 1972-05-11 | 1973-05-11 | Aparelho para ler um veiculo refletor plano gravado |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL7206377.A NL159844B (nl) | 1972-05-11 | 1972-05-11 | Inrichting voor het uitlezen van een vlakke stralingsre- flecterende registratiedrager. |
Publications (2)
Publication Number | Publication Date |
---|---|
NL7206377A true NL7206377A (un) | 1973-11-13 |
NL159844B NL159844B (nl) | 1979-03-15 |
Family
ID=19816020
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NL7206377.A NL159844B (nl) | 1972-05-11 | 1972-05-11 | Inrichting voor het uitlezen van een vlakke stralingsre- flecterende registratiedrager. |
Country Status (3)
Country | Link |
---|---|
BR (1) | BR7303455D0 (un) |
NL (1) | NL159844B (un) |
ZA (1) | ZA733044B (un) |
-
1972
- 1972-05-11 NL NL7206377.A patent/NL159844B/xx not_active IP Right Cessation
-
1973
- 1973-05-04 ZA ZA733044A patent/ZA733044B/xx unknown
- 1973-05-11 BR BR3455/73A patent/BR7303455D0/pt unknown
Also Published As
Publication number | Publication date |
---|---|
BR7303455D0 (pt) | 1974-07-25 |
NL159844B (nl) | 1979-03-15 |
AU5543173A (en) | 1974-11-14 |
ZA733044B (en) | 1974-12-24 |
Similar Documents
Legal Events
Date | Code | Title | Description |
---|---|---|---|
V1 | Lapsed because of non-payment of the annual fee | ||
NL80 | Abbreviated name of patent owner mentioned of already nullified patent |
Owner name: PHILIPS |