JPS6445318U - - Google Patents
Info
- Publication number
- JPS6445318U JPS6445318U JP1987138562U JP13856287U JPS6445318U JP S6445318 U JPS6445318 U JP S6445318U JP 1987138562 U JP1987138562 U JP 1987138562U JP 13856287 U JP13856287 U JP 13856287U JP S6445318 U JPS6445318 U JP S6445318U
- Authority
- JP
- Japan
- Prior art keywords
- light beam
- reflected light
- movable
- access
- light
- 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.)
- Pending
Links
- 230000003287 optical effect Effects 0.000 claims description 7
- 238000010586 diagram Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
- G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
- G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
- G11B11/10532—Heads
-
- 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 Head (AREA)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1987138562U JPS6445318U (US08063081-20111122-C00044.png) | 1987-09-10 | 1987-09-10 | |
US07/242,368 US4926409A (en) | 1987-09-10 | 1988-09-09 | Optical permitting record/playback from both sides of an optical disk |
US07/242,370 US4926403A (en) | 1987-09-10 | 1988-09-09 | Magneto-optic recording apparatus for recording information selectively on both sides of the recording medium |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1987138562U JPS6445318U (US08063081-20111122-C00044.png) | 1987-09-10 | 1987-09-10 |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6445318U true JPS6445318U (US08063081-20111122-C00044.png) | 1989-03-20 |
Family
ID=15225044
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1987138562U Pending JPS6445318U (US08063081-20111122-C00044.png) | 1987-09-10 | 1987-09-10 |
Country Status (2)
Country | Link |
---|---|
US (1) | US4926409A (US08063081-20111122-C00044.png) |
JP (1) | JPS6445318U (US08063081-20111122-C00044.png) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5144617A (en) * | 1989-11-16 | 1992-09-01 | Ricoh Company, Ltd. | Optical information read/write apparatus |
US5235591A (en) * | 1990-01-19 | 1993-08-10 | Hitachi, Ltd. | Stack type optical disc apparatus, sealed and separate type optical head therefor and optical disc medium |
US5053612A (en) * | 1990-03-28 | 1991-10-01 | Tech-S, Inc. | Barcode badge and ticket reader employing beam splitting |
JP2962363B2 (ja) * | 1990-04-28 | 1999-10-12 | 三菱電機株式会社 | 光ヘッド |
JP3159746B2 (ja) * | 1991-01-11 | 2001-04-23 | 旭光学工業株式会社 | 光磁気ディスク装置の信号検出系 |
JP2793067B2 (ja) * | 1991-04-04 | 1998-09-03 | 株式会社日立製作所 | 光ヘッド |
KR940000677B1 (ko) * | 1991-05-10 | 1994-01-27 | 삼성전자 주식회사 | 광디스크 재생장치에 있어서 광픽업위치 제어회로 |
WO1995035506A2 (en) * | 1994-06-17 | 1995-12-28 | Kensington Laboratories, Inc. | Scribe mark reader |
US5894530A (en) * | 1996-09-05 | 1999-04-13 | Electro Scientific Industries, Inc. | Optical viewing system for simultaneously viewing indicia located on top and bottom surfaces of a substrate |
US5966363A (en) * | 1997-01-07 | 1999-10-12 | Read Rite Corporation | Optical and magneto-optic data storage systems utilizing transmissive media |
US6407975B1 (en) * | 1998-03-16 | 2002-06-18 | Asahi Kogaku Kogyo Kabushiki Kaisha Of Tokyo | Optical disk drive |
JP2001297454A (ja) | 2000-04-14 | 2001-10-26 | Matsushita Electric Ind Co Ltd | 光ディスク装置 |
US20070053276A1 (en) * | 2005-09-08 | 2007-03-08 | Hanks D M | Optics for double-sided media |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60239945A (ja) * | 1984-05-15 | 1985-11-28 | Seiko Epson Corp | マルチ光学ヘッド |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3774172A (en) * | 1972-03-23 | 1973-11-20 | D Silverman | Random access multiple disc optical information storage system |
US4416003A (en) * | 1980-08-13 | 1983-11-15 | Sharp Kabushiki Kaisha | Both side record player |
US4566087A (en) * | 1984-05-22 | 1986-01-21 | Casdade Systems Incorporated | Digital optical disk system |
-
1987
- 1987-09-10 JP JP1987138562U patent/JPS6445318U/ja active Pending
-
1988
- 1988-09-09 US US07/242,368 patent/US4926409A/en not_active Expired - Fee Related
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60239945A (ja) * | 1984-05-15 | 1985-11-28 | Seiko Epson Corp | マルチ光学ヘッド |
Also Published As
Publication number | Publication date |
---|---|
US4926409A (en) | 1990-05-15 |