JPH0114561B2 - - Google Patents
Info
- Publication number
- JPH0114561B2 JPH0114561B2 JP714381A JP714381A JPH0114561B2 JP H0114561 B2 JPH0114561 B2 JP H0114561B2 JP 714381 A JP714381 A JP 714381A JP 714381 A JP714381 A JP 714381A JP H0114561 B2 JPH0114561 B2 JP H0114561B2
- Authority
- JP
- Japan
- Prior art keywords
- light
- prism
- refractive index
- thin film
- high refractive
- 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
- 239000010409 thin film Substances 0.000 claims description 43
- 238000001514 detection method Methods 0.000 claims description 36
- 230000008859 change Effects 0.000 claims description 31
- 239000010408 film Substances 0.000 claims description 20
- 230000003287 optical effect Effects 0.000 description 16
- 239000011521 glass Substances 0.000 description 15
- 230000035945 sensitivity Effects 0.000 description 11
- 238000010586 diagram Methods 0.000 description 8
- 239000010410 layer Substances 0.000 description 7
- 229910010413 TiO 2 Inorganic materials 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 230000004907 flux Effects 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 3
- 239000002356 single layer Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- NCGICGYLBXGBGN-UHFFFAOYSA-N 3-morpholin-4-yl-1-oxa-3-azonia-2-azanidacyclopent-3-en-5-imine;hydrochloride Chemical compound Cl.[N-]1OC(=N)C=[N+]1N1CCOCC1 NCGICGYLBXGBGN-UHFFFAOYSA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 230000005236 sound signal Effects 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/10—Beam splitting or combining systems
- G02B27/16—Beam splitting or combining systems used as aids for focusing
-
- 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
- G11B2007/0919—Critical angle methods
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Automatic Focus Adjustment (AREA)
- Optical Recording Or Reproduction (AREA)
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP714381A JPS57122410A (en) | 1981-01-22 | 1981-01-22 | Focus detecting method |
| US06/339,718 US4505584A (en) | 1981-01-22 | 1982-01-15 | Method and apparatus for detecting focussing error signal of objective lens |
| KR8200249A KR850001924B1 (en) | 1981-01-22 | 1982-01-21 | The method and apparatus for detecting a focussing error signal of objective lens |
| FR8200918A FR2498340A1 (fr) | 1981-01-22 | 1982-01-21 | Procede et appareil de detection d'un signal d'erreur de focalisation d'un objectif |
| NLAANVRAGE8200220,A NL184245C (nl) | 1981-01-22 | 1982-01-21 | Inrichting voor het verkrijgen van een focusseringsfoutsignaal van een objectieflens met betrekking tot een voorwerp waarop door de objectieflens een lichtbundel moet worden gefocusseerd. |
| GB08201844A GB2110499B (en) | 1981-01-22 | 1982-01-22 | Method and apparatus for detecting focussing error signal of objective lens |
| DE3201964A DE3201964C2 (de) | 1981-01-22 | 1982-01-22 | Vorrichtung zum Scharfstellen eines Objektivs |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP714381A JPS57122410A (en) | 1981-01-22 | 1981-01-22 | Focus detecting method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57122410A JPS57122410A (en) | 1982-07-30 |
| JPH0114561B2 true JPH0114561B2 (US07655746-20100202-C00011.png) | 1989-03-13 |
Family
ID=11657845
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP714381A Granted JPS57122410A (en) | 1981-01-22 | 1981-01-22 | Focus detecting method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57122410A (US07655746-20100202-C00011.png) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI97835C (fi) * | 1994-11-10 | 1997-02-25 | Abb Industry Oy | Liukulaakeroidun sähkökoneen voitelujärjestelmä |
-
1981
- 1981-01-22 JP JP714381A patent/JPS57122410A/ja active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57122410A (en) | 1982-07-30 |
