JPH0580736B2 - - Google Patents
Info
- Publication number
- JPH0580736B2 JPH0580736B2 JP59132294A JP13229484A JPH0580736B2 JP H0580736 B2 JPH0580736 B2 JP H0580736B2 JP 59132294 A JP59132294 A JP 59132294A JP 13229484 A JP13229484 A JP 13229484A JP H0580736 B2 JPH0580736 B2 JP H0580736B2
- Authority
- JP
- Japan
- Prior art keywords
- light
- diffraction grating
- information
- recording surface
- optical
- 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.)
- Expired - Lifetime
Links
- 230000003287 optical effect Effects 0.000 claims description 32
- 230000000694 effects Effects 0.000 claims description 7
- 238000010586 diagram Methods 0.000 description 14
- 239000000758 substrate Substances 0.000 description 9
- 230000010287 polarization Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 239000004065 semiconductor Substances 0.000 description 6
- 238000001514 detection method Methods 0.000 description 5
- 230000005415 magnetization Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 239000000969 carrier Substances 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 108010010803 Gelatin Proteins 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 201000009310 astigmatism Diseases 0.000 description 1
- SOCTUWSJJQCPFX-UHFFFAOYSA-N dichromate(2-) Chemical compound [O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O SOCTUWSJJQCPFX-UHFFFAOYSA-N 0.000 description 1
- 229920000159 gelatin Polymers 0.000 description 1
- 239000008273 gelatin Substances 0.000 description 1
- 235000019322 gelatine Nutrition 0.000 description 1
- 235000011852 gelatine desserts Nutrition 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
- G11B11/1055—Disposition or mounting of transducers relative to record carriers
- G11B11/10576—Disposition or mounting of transducers relative to record carriers with provision for moving the transducers for maintaining alignment or spacing relative to the carrier
-
- 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
- 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
- G11B11/10541—Heads for 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
- G11B7/12—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)
- Diffracting Gratings Or Hologram Optical Elements (AREA)
- Optical Head (AREA)
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59132294A JPS6111951A (ja) | 1984-06-27 | 1984-06-27 | 光ヘツド装置 |
| US06/748,342 US4733065A (en) | 1984-06-27 | 1985-06-24 | Optical head device with diffraction grating for separating a light beam incident on an optical recording medium from a light beam reflected therefrom |
| DE19853522849 DE3522849A1 (de) | 1984-06-27 | 1985-06-26 | Optischer kopf |
| FR8509716A FR2566953A1 (fr) | 1984-06-27 | 1985-06-26 | Dispositif de tete optique |
| NL8501857A NL194898C (nl) | 1984-06-27 | 1985-06-27 | Optische lezer. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59132294A JPS6111951A (ja) | 1984-06-27 | 1984-06-27 | 光ヘツド装置 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6111951A JPS6111951A (ja) | 1986-01-20 |
| JPH0580736B2 true JPH0580736B2 (fr) | 1993-11-10 |
Family
ID=15077921
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59132294A Granted JPS6111951A (ja) | 1984-06-27 | 1984-06-27 | 光ヘツド装置 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6111951A (fr) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0821174B2 (ja) * | 1986-09-09 | 1996-03-04 | キヤノン電子株式会社 | 光ヘツド装置 |
| JPH07111784B2 (ja) * | 1988-04-21 | 1995-11-29 | 三菱電機株式会社 | 光ピックアップ装置 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57155508A (en) * | 1981-02-23 | 1982-09-25 | Xerox Corp | Polaroid beam splitter |
| JPS58196640A (ja) * | 1982-05-12 | 1983-11-16 | Olympus Optical Co Ltd | 磁気光学記録再生装置 |
-
1984
- 1984-06-27 JP JP59132294A patent/JPS6111951A/ja active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57155508A (en) * | 1981-02-23 | 1982-09-25 | Xerox Corp | Polaroid beam splitter |
| JPS58196640A (ja) * | 1982-05-12 | 1983-11-16 | Olympus Optical Co Ltd | 磁気光学記録再生装置 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6111951A (ja) | 1986-01-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |