JPS6367256B2 - - Google Patents
Info
- Publication number
- JPS6367256B2 JPS6367256B2 JP5712681A JP5712681A JPS6367256B2 JP S6367256 B2 JPS6367256 B2 JP S6367256B2 JP 5712681 A JP5712681 A JP 5712681A JP 5712681 A JP5712681 A JP 5712681A JP S6367256 B2 JPS6367256 B2 JP S6367256B2
- Authority
- JP
- Japan
- Prior art keywords
- recording
- recording layer
- laser
- irradiation means
- laser beam
- 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
Links
- 230000003287 optical effect Effects 0.000 claims description 26
- 230000003247 decreasing effect Effects 0.000 claims 1
- 230000035945 sensitivity Effects 0.000 description 5
- 238000000926 separation method Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 239000000020 Nitrocellulose Substances 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229940093920 gynecological arsenic compound Drugs 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920001220 nitrocellulos Polymers 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 229920003217 poly(methylsilsesquioxane) Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 229910052714 tellurium Inorganic materials 0.000 description 1
- PORWMNRCUJJQNO-UHFFFAOYSA-N tellurium atom Chemical compound [Te] PORWMNRCUJJQNO-UHFFFAOYSA-N 0.000 description 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
- G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
- G11B7/0055—Erasing
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/28—Systems for automatic generation of focusing signals
- G02B7/30—Systems for automatic generation of focusing signals using parallactic triangle with a base line
- G02B7/32—Systems for automatic generation of focusing signals using parallactic triangle with a base line using active means, e.g. light emitter
-
- 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
-
- 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
- G11B7/0917—Focus-error methods other than those covered by G11B7/0909 - G11B7/0916
-
- 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
- G11B7/0917—Focus-error methods other than those covered by G11B7/0909 - G11B7/0916
- G11B2007/0924—Skewed beams methods (using an angled beam, i.e. a beam which is reflected from the disc at an angle different from 90°)
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Automatic Focus Adjustment (AREA)
- Optical Recording Or Reproduction (AREA)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5712681A JPS57172306A (en) | 1981-04-17 | 1981-04-17 | Focus controller of optical recording system |
| US06/362,983 US4530080A (en) | 1981-04-07 | 1982-03-29 | Optical recording/reproducing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5712681A JPS57172306A (en) | 1981-04-17 | 1981-04-17 | Focus controller of optical recording system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57172306A JPS57172306A (en) | 1982-10-23 |
| JPS6367256B2 true JPS6367256B2 (ru) | 1988-12-23 |
Family
ID=13046864
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5712681A Granted JPS57172306A (en) | 1981-04-07 | 1981-04-17 | Focus controller of optical recording system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57172306A (ru) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01151428U (ru) * | 1988-04-06 | 1989-10-19 | ||
| JP2757541B2 (ja) * | 1990-06-29 | 1998-05-25 | キヤノン株式会社 | 焦点検出装置及びそれを備えた観察装置 |
| CN101862912A (zh) * | 2010-03-11 | 2010-10-20 | 广东海洋大学 | 一种手持式激光打孔的方法 |
| CN101862911A (zh) * | 2010-03-11 | 2010-10-20 | 广东海洋大学 | 一种手持式激光切割的方法 |
| CN101862902A (zh) * | 2010-03-11 | 2010-10-20 | 广东海洋大学 | 一种手持式激光焊接的方法及装置 |
-
1981
- 1981-04-17 JP JP5712681A patent/JPS57172306A/ja active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57172306A (en) | 1982-10-23 |
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