IT1065693B - Sistema di rivenazione degli scarti di focalizzazione e lettore ottico video utilizzante tale sistema - Google Patents
Sistema di rivenazione degli scarti di focalizzazione e lettore ottico video utilizzante tale sistemaInfo
- Publication number
- IT1065693B IT1065693B IT30904/76A IT3090476A IT1065693B IT 1065693 B IT1065693 B IT 1065693B IT 30904/76 A IT30904/76 A IT 30904/76A IT 3090476 A IT3090476 A IT 3090476A IT 1065693 B IT1065693 B IT 1065693B
- Authority
- IT
- Italy
- Prior art keywords
- focusing
- waste
- optical reader
- renovation
- video
- Prior art date
Links
- 230000003287 optical effect Effects 0.000 title 1
- 238000009418 renovation Methods 0.000 title 1
- 239000002699 waste material Substances 0.000 title 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
- G11B7/08—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
- G11B7/0909—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 by astigmatic methods
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US05/645,490 US4025949A (en) | 1975-12-31 | 1975-12-31 | Symmetrical astigmatic focus sensing system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| IT1065693B true IT1065693B (it) | 1985-03-04 |
Family
ID=24589236
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IT30904/76A IT1065693B (it) | 1975-12-31 | 1976-12-28 | Sistema di rivenazione degli scarti di focalizzazione e lettore ottico video utilizzante tale sistema |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US4025949A (enExample) |
| JP (1) | JPS608535B2 (enExample) |
| CA (1) | CA1073255A (enExample) |
| DE (1) | DE2659618C2 (enExample) |
| FR (1) | FR2337473A1 (enExample) |
| GB (1) | GB1573021A (enExample) |
| IT (1) | IT1065693B (enExample) |
Families Citing this family (28)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2325987A1 (fr) * | 1975-09-29 | 1977-04-22 | Thomson Brandt | Dispositif de lecture optique d'un enregistrement |
| JPS5266405A (en) * | 1975-11-29 | 1977-06-01 | Victor Co Of Japan Ltd | Optical recording system of information recording discs |
| GB1532345A (en) * | 1976-06-25 | 1978-11-15 | Hitachi Ltd | Information play-back apparatus |
| NL7703077A (nl) * | 1977-03-22 | 1978-09-26 | Philips Nv | Inrichting voor het uitlezen van een stralings- reflekterende registratiedrager. |
| CA1131361A (en) * | 1977-05-11 | 1982-09-07 | Fumitaka Kotaka | Focus servo device for use in optical read-out device of information |
| US4223348A (en) * | 1977-09-12 | 1980-09-16 | Olympus Optical Co., Ltd. | Automatic focussing device |
| JPS54155832A (en) * | 1978-05-30 | 1979-12-08 | Canon Inc | Focusing detector |
| JPS55927A (en) * | 1978-06-16 | 1980-01-07 | Pioneer Video Corp | Focus servo unit of optical information reader |
| JPS6038771B2 (ja) * | 1978-06-19 | 1985-09-03 | パイオニア株式会社 | 光学式情報読取装置のサ−ボ装置 |
| NL7907216A (nl) * | 1979-09-28 | 1981-03-31 | Philips Nv | Optisch fokusfout-detektiestelsel. |
| NL8004892A (nl) * | 1980-08-29 | 1982-04-01 | Philips Nv | Inrichting voor het verwerken van optische informatie en werkwijze voor het vervaardigen van een coma-correctieplaat zoals toegepast in een dergelijke inrichting. |
| JPS5744236A (en) * | 1980-08-29 | 1982-03-12 | Matsushita Electric Ind Co Ltd | Optical information reproducer |
| JPS5774837A (en) * | 1980-10-25 | 1982-05-11 | Olympus Optical Co Ltd | Signal detection system of optical information reproducing device |
| FR2498341A1 (fr) * | 1981-01-20 | 1982-07-23 | Thomson Csf | Dispositif optique detecteur d'ecart de focalisation et enregistreur lecteur optique comportant un tel dispositif |
| FR2502800A1 (fr) * | 1981-03-24 | 1982-10-01 | Thomson Csf | Senseur optique d'asservissement de focalisation |
| US4458144A (en) * | 1981-06-30 | 1984-07-03 | Storage Technology Corporation | Apparatus for reading information stored in a track pattern on a radiation reflecting record |
| NL8105579A (nl) * | 1981-12-11 | 1983-07-01 | Philips Nv | Optisch fokusfoutdetektiestelsel. |
| JPS58220250A (ja) * | 1982-06-16 | 1983-12-21 | Ricoh Co Ltd | 自動焦点合せ光学系 |
| JPS58193335U (ja) * | 1982-06-17 | 1983-12-22 | パイオニア株式会社 | フオ−カスエラ−検出装置 |
| FR2536568A1 (fr) * | 1982-11-18 | 1984-05-25 | Sony Corp | Appareil de detection de la position d'un lecteur optique |
| JPS6077022U (ja) * | 1983-11-01 | 1985-05-29 | パイオニア株式会社 | 焦点誤差検出装置 |
| DE3340009A1 (de) * | 1983-11-04 | 1985-05-15 | Max-Planck-Gesellschaft zur Förderung der Wissenschaften e.V., 3400 Göttingen | Verfahren und einrichtung zum ermitteln des fokussierungszustandes eines abbildenden teilchenoptischen geraetes |
| JPS60185230A (ja) * | 1984-03-02 | 1985-09-20 | Pioneer Electronic Corp | 焦点誤差検出装置 |
| US4799210A (en) * | 1986-11-05 | 1989-01-17 | Unisys Corporation | Fiber optic read/write head for an optical disk memory system |
| US5353272A (en) * | 1992-12-29 | 1994-10-04 | Eastman Kodak Company | Apparatus and method for a modified half-aperture focus/tracking/data sensor system |
| DE19726581C5 (de) * | 1997-06-23 | 2010-02-04 | Sick Ag | Verfahren zur Bestimmung der Fokuslage einer optoelektronischen Vorrichtung |
| DE102009049167A1 (de) * | 2009-10-12 | 2011-05-05 | Imos Gubela Gmbh | Sicherheitslupe zur Vergrößerung und zur Vermeidung des Brennglaseffektes |
| US10001622B2 (en) * | 2011-10-25 | 2018-06-19 | Sanford Burnham Medical Research Institute | Multifunction autofocus system and method for automated microscopy |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3596101A (en) * | 1969-11-05 | 1971-07-27 | Canon Kk | Optical systems for automatic focusing apparatus |
| FR2266932B1 (enExample) * | 1973-03-02 | 1977-09-02 | Thomson Brandt | |
| JPS5016423A (enExample) * | 1973-06-11 | 1975-02-21 | ||
| FR2235448B1 (enExample) * | 1973-06-29 | 1976-05-07 | Thomson Brandt | |
| FR2271590B1 (enExample) * | 1974-01-15 | 1978-12-01 | Thomson Brandt | |
| NL7414776A (nl) * | 1974-11-13 | 1976-05-17 | Philips Nv | Inrichting voor het uitlezen van een registra- tiedrager met een optische informatiestruktuur. |
| US3983317A (en) * | 1974-12-09 | 1976-09-28 | Teletype Corporation | Astigmatizer for laser recording and reproducing system |
-
1975
- 1975-12-31 US US05/645,490 patent/US4025949A/en not_active Expired - Lifetime
-
1976
- 1976-12-10 FR FR7637334A patent/FR2337473A1/fr active Granted
- 1976-12-27 JP JP51160945A patent/JPS608535B2/ja not_active Expired
- 1976-12-28 IT IT30904/76A patent/IT1065693B/it active
- 1976-12-29 GB GB54205/76A patent/GB1573021A/en not_active Expired
- 1976-12-30 CA CA268,953A patent/CA1073255A/en not_active Expired
- 1976-12-30 DE DE2659618A patent/DE2659618C2/de not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CA1073255A (en) | 1980-03-11 |
| US4025949A (en) | 1977-05-24 |
| FR2337473A1 (fr) | 1977-07-29 |
| JPS608535B2 (ja) | 1985-03-04 |
| DE2659618C2 (de) | 1986-08-28 |
| GB1573021A (en) | 1980-08-13 |
| FR2337473B1 (enExample) | 1980-08-29 |
| JPS5285801A (en) | 1977-07-16 |
| DE2659618A1 (de) | 1977-07-14 |
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