JPH056262B2 - - Google Patents
Info
- Publication number
- JPH056262B2 JPH056262B2 JP59067649A JP6764984A JPH056262B2 JP H056262 B2 JPH056262 B2 JP H056262B2 JP 59067649 A JP59067649 A JP 59067649A JP 6764984 A JP6764984 A JP 6764984A JP H056262 B2 JPH056262 B2 JP H056262B2
- Authority
- JP
- Japan
- Prior art keywords
- semiconductor laser
- light
- light beam
- prism
- lens
- 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
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
- G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
- G11B7/1398—Means for shaping the cross-section of the beam, e.g. into circular or elliptical cross-section
-
- 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
- G11B7/085—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam into, or out of, its operative position or across tracks, otherwise than during the transducing operation, e.g. for adjustment or preliminary positioning or track change or selection
- G11B7/08547—Arrangements for positioning the light beam only without moving the head, e.g. using static electro-optical elements
-
- 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
- G11B7/1356—Double or multiple prisms, i.e. having two or more prisms in cooperation
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Head (AREA)
- Optical Elements Other Than Lenses (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59067649A JPS59229753A (ja) | 1984-04-06 | 1984-04-06 | 光情報処理装置 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59067649A JPS59229753A (ja) | 1984-04-06 | 1984-04-06 | 光情報処理装置 |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59149442A Division JPS60106038A (ja) | 1984-07-20 | 1984-07-20 | 光学装置 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59229753A JPS59229753A (ja) | 1984-12-24 |
| JPH056262B2 true JPH056262B2 (en, 2012) | 1993-01-26 |
Family
ID=13351078
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59067649A Granted JPS59229753A (ja) | 1984-04-06 | 1984-04-06 | 光情報処理装置 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59229753A (en, 2012) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5477386A (en) * | 1991-07-24 | 1995-12-19 | Asahi Kogaku Kogyo Kabushiki Kaisha | Optical system for optical disc apparatus including anamorphic prisms |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53100844A (en) * | 1977-02-15 | 1978-09-02 | Canon Inc | Beam shaping optical system |
| JPS5455184A (en) * | 1977-10-11 | 1979-05-02 | Canon Inc | Semiconductor laser light source unit |
-
1984
- 1984-04-06 JP JP59067649A patent/JPS59229753A/ja active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59229753A (ja) | 1984-12-24 |
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