JPS5768813A - Optical information reader - Google Patents
Optical information readerInfo
- Publication number
- JPS5768813A JPS5768813A JP55146166A JP14616680A JPS5768813A JP S5768813 A JPS5768813 A JP S5768813A JP 55146166 A JP55146166 A JP 55146166A JP 14616680 A JP14616680 A JP 14616680A JP S5768813 A JPS5768813 A JP S5768813A
- Authority
- JP
- Japan
- Prior art keywords
- light beam
- splitter
- wavelength plate
- reflected
- reflector
- 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
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
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Head (AREA)
- Control Of Position Or Direction (AREA)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55146166A JPS5768813A (en) | 1980-10-17 | 1980-10-17 | Optical information reader |
US06/311,901 US4447722A (en) | 1980-10-17 | 1981-10-15 | Optical information reading device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55146166A JPS5768813A (en) | 1980-10-17 | 1980-10-17 | Optical information reader |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5768813A true JPS5768813A (en) | 1982-04-27 |
JPS6334532B2 JPS6334532B2 (US06272168-20010807-M00014.png) | 1988-07-11 |
Family
ID=15401618
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP55146166A Granted JPS5768813A (en) | 1980-10-17 | 1980-10-17 | Optical information reader |
Country Status (2)
Country | Link |
---|---|
US (1) | US4447722A (US06272168-20010807-M00014.png) |
JP (1) | JPS5768813A (US06272168-20010807-M00014.png) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59187309A (ja) * | 1983-04-07 | 1984-10-24 | Mitsubishi Electric Corp | 集光装置 |
JPS6069614A (ja) * | 1983-09-27 | 1985-04-20 | Mitsubishi Electric Corp | 集光装置、及この装置を利用した光学式情報記録、または再生装置 |
JPH0261831A (ja) * | 1988-08-26 | 1990-03-01 | Mitsumi Electric Co Ltd | 光学的ヘッド |
WO2007026460A1 (ja) * | 2005-08-31 | 2007-03-08 | Mitsumi Electric Co., Ltd. | 光ピックアップ装置 |
Families Citing this family (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2584223B1 (fr) * | 1985-06-28 | 1994-06-17 | Thomson Alcatel Gigadisc | Memoire optique a suivi de piste echantillonne pour support d'information pregrave. |
US5265079A (en) | 1991-02-15 | 1993-11-23 | Applied Magnetics Corporation | Seek actuator for optical recording |
US6141300A (en) * | 1989-06-20 | 2000-10-31 | Discovision Associates | Optical actuator including lens assembly with optical axis having symmetric suspensory forces acting thereon and optical disc system including same |
US4998011A (en) * | 1989-11-17 | 1991-03-05 | Applied Magnetics Corporation | Flat plate focus sensing apparatus |
US5115420A (en) * | 1990-01-16 | 1992-05-19 | International Business Machines Corporation | Utilizing wasted laser light in optical systems |
US5245174A (en) * | 1990-10-15 | 1993-09-14 | Applied Magnetics Corporation | Focus sensing apparatus utilizing a reflecting surface having variable reflectivity |
GB2248989B (en) * | 1990-10-15 | 1995-05-24 | Applied Magnetics Corp | Focus sensing apparatus and method |
US5729511A (en) * | 1991-02-15 | 1998-03-17 | Discovision Associates | Optical disc system having servo motor and servo error detection assembly operated relative to monitored quad sum signal |
US5677899A (en) | 1991-02-15 | 1997-10-14 | Discovision Associates | Method for moving carriage assembly from initial position to target position relative to storage medium |
US6236625B1 (en) | 1991-02-15 | 2001-05-22 | Discovision Associates | Optical disc system having current monitoring circuit with controller for laser driver and method for operating same |
US5808980A (en) * | 1991-02-15 | 1998-09-15 | Discovision Associates | Seek actuator for optical recording |
US6069857A (en) * | 1991-02-15 | 2000-05-30 | Discovision Associates | Optical disc system having improved circuitry for performing blank sector check on readable disc |
US5331622A (en) * | 1991-05-28 | 1994-07-19 | Applied Magnetics Corporation | Compact optical head |
US5646778A (en) * | 1991-05-28 | 1997-07-08 | Discovision Associates | Optical beamsplitter |
US5920539A (en) * | 1995-01-25 | 1999-07-06 | Discovision Associates | Apparatus and method for suppression of electromagnetic emissions having a groove on an external surface for passing an electrical conductor |
US6434087B1 (en) | 1995-01-25 | 2002-08-13 | Discovision Associates | Optical disc system and method for controlling bias coil and light source to process information on a storage medium |
US6091684A (en) * | 1995-01-25 | 2000-07-18 | Discovision Associates | Optical disc system and method for changing the rotational rate of an information storage medium |
US5748578A (en) * | 1995-01-25 | 1998-05-05 | Discovision Associates | Colpitts type oscillator having reduced ringing and improved optical disc system utilizing same |
KR19980058055A (ko) * | 1996-12-30 | 1998-09-25 | 배순훈 | 광 픽업 장치 |
US6407861B1 (en) * | 1999-04-06 | 2002-06-18 | Adc Telecommunications, Inc. | Adjustable optical circulator |
US6724711B2 (en) * | 2001-03-09 | 2004-04-20 | Imation Corp. | Apparatuses and methods for directing light beams in an optical recording system |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4264986A (en) * | 1979-03-12 | 1981-04-28 | Willis Craig I | Information-recording process & apparatus |
JPS55155308A (en) * | 1979-05-23 | 1980-12-03 | Canon Inc | Focusing position detecting system |
FR2470391A1 (fr) * | 1979-11-21 | 1981-05-29 | Thomson Csf | Dispositif optique stigmatique d'emission-reception de rayonnements coherents et tete optique d'enregistrement-lecture comprenant un tel dispositif |
-
1980
- 1980-10-17 JP JP55146166A patent/JPS5768813A/ja active Granted
-
1981
- 1981-10-15 US US06/311,901 patent/US4447722A/en not_active Expired - Fee Related
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59187309A (ja) * | 1983-04-07 | 1984-10-24 | Mitsubishi Electric Corp | 集光装置 |
JPS6327689B2 (US06272168-20010807-M00014.png) * | 1983-04-07 | 1988-06-03 | Mitsubishi Electric Corp | |
JPS6069614A (ja) * | 1983-09-27 | 1985-04-20 | Mitsubishi Electric Corp | 集光装置、及この装置を利用した光学式情報記録、または再生装置 |
JPS6334446B2 (US06272168-20010807-M00014.png) * | 1983-09-27 | 1988-07-11 | Mitsubishi Electric Corp | |
JPH0261831A (ja) * | 1988-08-26 | 1990-03-01 | Mitsumi Electric Co Ltd | 光学的ヘッド |
WO2007026460A1 (ja) * | 2005-08-31 | 2007-03-08 | Mitsumi Electric Co., Ltd. | 光ピックアップ装置 |
Also Published As
Publication number | Publication date |
---|---|
US4447722A (en) | 1984-05-08 |
JPS6334532B2 (US06272168-20010807-M00014.png) | 1988-07-11 |
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