JPS5990237A - 光学ヘツド - Google Patents
光学ヘツドInfo
- Publication number
- JPS5990237A JPS5990237A JP57200640A JP20064082A JPS5990237A JP S5990237 A JPS5990237 A JP S5990237A JP 57200640 A JP57200640 A JP 57200640A JP 20064082 A JP20064082 A JP 20064082A JP S5990237 A JPS5990237 A JP S5990237A
- Authority
- JP
- Japan
- Prior art keywords
- light
- focus
- objective
- lens
- objective 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.)
- Granted
Links
- 230000003287 optical effect Effects 0.000 title claims description 47
- 239000000284 extract Substances 0.000 claims abstract description 3
- 238000000605 extraction Methods 0.000 claims description 7
- 240000002834 Paulownia tomentosa Species 0.000 claims 1
- 238000006073 displacement reaction Methods 0.000 claims 1
- 238000001514 detection method Methods 0.000 description 16
- 238000010586 diagram Methods 0.000 description 6
- 239000011799 hole material Substances 0.000 description 5
- 238000003384 imaging method Methods 0.000 description 3
- 229920006395 saturated elastomer Polymers 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- 241000219198 Brassica Species 0.000 description 1
- 235000003351 Brassica cretica Nutrition 0.000 description 1
- 235000003343 Brassica rupestris Nutrition 0.000 description 1
- 235000019733 Fish meal Nutrition 0.000 description 1
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 1
- 240000003473 Grevillea banksii Species 0.000 description 1
- 241000254158 Lampyridae Species 0.000 description 1
- 101000905241 Mus musculus Heart- and neural crest derivatives-expressed protein 1 Proteins 0.000 description 1
- 241000282376 Panthera tigris Species 0.000 description 1
- 102000005840 alpha-Galactosidase Human genes 0.000 description 1
- 108010030291 alpha-Galactosidase Proteins 0.000 description 1
- 229940033685 beano Drugs 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- QKSKPIVNLNLAAV-UHFFFAOYSA-N bis(2-chloroethyl) sulfide Chemical compound ClCCSCCCl QKSKPIVNLNLAAV-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000004467 fishmeal Substances 0.000 description 1
- 244000144992 flock Species 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 210000004907 gland Anatomy 0.000 description 1
- 239000005337 ground glass Substances 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 239000010977 jade Substances 0.000 description 1
- 210000003127 knee Anatomy 0.000 description 1
- 210000002414 leg Anatomy 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 235000013372 meat Nutrition 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 235000010460 mustard Nutrition 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 230000033764 rhythmic process Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000007740 vapor deposition Methods 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
- G11B7/0908—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
Landscapes
- Automatic Focus Adjustment (AREA)
- Optical Recording Or Reproduction (AREA)
- Optical Head (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57200640A JPS5990237A (ja) | 1982-11-16 | 1982-11-16 | 光学ヘツド |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57200640A JPS5990237A (ja) | 1982-11-16 | 1982-11-16 | 光学ヘツド |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62196240A Division JPH0636249B2 (ja) | 1987-08-07 | 1987-08-07 | 光学ヘッド |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5990237A true JPS5990237A (ja) | 1984-05-24 |
| JPS63855B2 JPS63855B2 (enrdf_load_stackoverflow) | 1988-01-08 |
Family
ID=16427749
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57200640A Granted JPS5990237A (ja) | 1982-11-16 | 1982-11-16 | 光学ヘツド |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5990237A (enrdf_load_stackoverflow) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5036185A (en) * | 1988-12-27 | 1991-07-30 | Kabushiki Kaisha Toshiba | Optical apparatus for detecting a focusing state |
-
1982
- 1982-11-16 JP JP57200640A patent/JPS5990237A/ja active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5036185A (en) * | 1988-12-27 | 1991-07-30 | Kabushiki Kaisha Toshiba | Optical apparatus for detecting a focusing state |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63855B2 (enrdf_load_stackoverflow) | 1988-01-08 |
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