JPH0470697B2 - - Google Patents
Info
- Publication number
- JPH0470697B2 JPH0470697B2 JP56034959A JP3495981A JPH0470697B2 JP H0470697 B2 JPH0470697 B2 JP H0470697B2 JP 56034959 A JP56034959 A JP 56034959A JP 3495981 A JP3495981 A JP 3495981A JP H0470697 B2 JPH0470697 B2 JP H0470697B2
- Authority
- JP
- Japan
- Prior art keywords
- signal
- focus control
- circuit
- light beam
- converging
- 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
- 238000001514 detection method Methods 0.000 claims description 23
- 230000003287 optical effect Effects 0.000 claims description 23
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims description 16
- 238000013459 approach Methods 0.000 claims 2
- 230000001678 irradiating effect Effects 0.000 claims 1
- 239000000463 material Substances 0.000 description 37
- 239000011241 protective layer Substances 0.000 description 19
- 238000010586 diagram Methods 0.000 description 9
- 238000007493 shaping process Methods 0.000 description 7
- 230000005484 gravity Effects 0.000 description 5
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 201000009310 astigmatism Diseases 0.000 description 1
- 229910052797 bismuth Inorganic materials 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000035945 sensitivity Effects 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
- G11B7/08—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
- G11B7/0945—Methods for initialising servos, start-up sequences
Landscapes
- Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3495981A JPS57150148A (en) | 1981-03-10 | 1981-03-10 | Optical type recorder and reproducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3495981A JPS57150148A (en) | 1981-03-10 | 1981-03-10 | Optical type recorder and reproducer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57150148A JPS57150148A (en) | 1982-09-16 |
| JPH0470697B2 true JPH0470697B2 (US07943777-20110517-C00090.png) | 1992-11-11 |
Family
ID=12428680
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3495981A Granted JPS57150148A (en) | 1981-03-10 | 1981-03-10 | Optical type recorder and reproducer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57150148A (US07943777-20110517-C00090.png) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60251529A (ja) * | 1984-05-25 | 1985-12-12 | Sony Corp | 光学式ディスク・プレーヤ |
| JPH0664744B2 (ja) * | 1986-11-19 | 1994-08-22 | 松下電送株式会社 | 光デイスク装置のフオ−カスサ−ボ装置 |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5538639A (en) * | 1978-09-07 | 1980-03-18 | Pioneer Video Corp | Servo drawing-in unit for focus lens of optical information reader |
-
1981
- 1981-03-10 JP JP3495981A patent/JPS57150148A/ja active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5538639A (en) * | 1978-09-07 | 1980-03-18 | Pioneer Video Corp | Servo drawing-in unit for focus lens of optical information reader |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57150148A (en) | 1982-09-16 |
