DE2643901A1 - Optische vorrichtung zur beleuchtung eines beweglichen informationstraegers - Google Patents
Optische vorrichtung zur beleuchtung eines beweglichen informationstraegersInfo
- Publication number
- DE2643901A1 DE2643901A1 DE19762643901 DE2643901A DE2643901A1 DE 2643901 A1 DE2643901 A1 DE 2643901A1 DE 19762643901 DE19762643901 DE 19762643901 DE 2643901 A DE2643901 A DE 2643901A DE 2643901 A1 DE2643901 A1 DE 2643901A1
- Authority
- DE
- Germany
- Prior art keywords
- optical
- radiation
- plane
- laser
- incidence
- 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.)
- Withdrawn
Links
- 230000003287 optical effect Effects 0.000 title claims description 29
- 230000005855 radiation Effects 0.000 claims description 23
- 230000010355 oscillation Effects 0.000 claims description 22
- 230000010287 polarization Effects 0.000 claims description 10
- 230000007935 neutral effect Effects 0.000 claims description 6
- 239000000969 carrier Substances 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims 1
- 235000021185 dessert Nutrition 0.000 claims 1
- 238000000926 separation method Methods 0.000 claims 1
- 230000032258 transport Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 description 7
- 230000010363 phase shift Effects 0.000 description 4
- 238000013016 damping Methods 0.000 description 3
- 230000003595 spectral effect Effects 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- 238000000844 transformation Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000013598 vector Substances 0.000 description 2
- 238000010009 beating Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004049 embossing Methods 0.000 description 1
- 238000000295 emission spectrum Methods 0.000 description 1
- CPBQJMYROZQQJC-UHFFFAOYSA-N helium neon Chemical compound [He].[Ne] CPBQJMYROZQQJC-UHFFFAOYSA-N 0.000 description 1
- 239000011796 hollow space material Substances 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 230000001629 suppression 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
- G11B7/12—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
- G11B7/1365—Separate or integrated refractive elements, e.g. wave plates
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Head (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7529706A FR2325951A1 (fr) | 1975-09-29 | 1975-09-29 | Procede de diminution de bruit optique et dispositif mettant en oeuvre un tel procede |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE2643901A1 true DE2643901A1 (de) | 1977-04-07 |
Family
ID=9160560
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19762643901 Withdrawn DE2643901A1 (de) | 1975-09-29 | 1976-09-29 | Optische vorrichtung zur beleuchtung eines beweglichen informationstraegers |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US4139263A (Direct) |
| JP (1) | JPS5242702A (Direct) |
| CA (1) | CA1067999A (Direct) |
| DE (1) | DE2643901A1 (Direct) |
| FR (1) | FR2325951A1 (Direct) |
| GB (1) | GB1567642A (Direct) |
Families Citing this family (33)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2402956A1 (fr) * | 1977-09-08 | 1979-04-06 | Comp Generale Electricite | Chaine d'amplification laser |
| US4310910A (en) * | 1978-09-19 | 1982-01-12 | Rca Corporation | Optimal polarization for the optical readout of high density video recording |
| GB2070490B (en) * | 1980-02-26 | 1984-07-04 | Ferranti Ltd | Laser cutting apparatus |
| US4443873A (en) * | 1980-10-20 | 1984-04-17 | Optical Coating Laboratory, Inc. | Optical system for optical disc reader |
| USRE32660E (en) * | 1982-04-19 | 1988-05-03 | Siscan Systems, Inc. | Confocal optical imaging system with improved signal-to-noise ratio |
| US4634880A (en) * | 1982-04-19 | 1987-01-06 | Siscan Systems, Inc. | Confocal optical imaging system with improved signal-to-noise ratio |
| JPS58194149A (ja) * | 1982-05-08 | 1983-11-12 | Asahi Optical Co Ltd | 光学的記録担体からの情報読取り装置 |
| JPS6421725A (en) * | 1987-07-15 | 1989-01-25 | Mitsubishi Electric Corp | Optical multi-wavelength recording and reproducing device |
| US5420848A (en) * | 1990-08-02 | 1995-05-30 | Canon Kabushiki Kaisha | Optical system for optical information recording/reproducing apparatus having a galvano mirror |
| FR2723243B1 (fr) * | 1994-07-26 | 1996-09-06 | Thomson Csf | Dispositif d'enregistrement et/ou de lecture de tetes magnetiques et son procede de realisation |
| US7301631B1 (en) * | 2004-09-17 | 2007-11-27 | J.A. Woollam Co., Inc. | Control of uncertain angle of incidence of beam from Arc lamp |
| FR2739965B1 (fr) * | 1995-10-17 | 1997-11-07 | Thomson Csf | Dispositif emetteur-recepteur de lumiere et systeme de lecture optique |
| JP3629275B2 (ja) * | 1996-05-09 | 2005-03-16 | シーゲイト テクノロジー エルエルシー | 多重レンズフォーカシングを利用するレーザ照射によって磁気記録媒体に集合組織を形成する方法 |
| US5955154A (en) * | 1996-05-09 | 1999-09-21 | Seagate Technology, Inc. | Magnetic recording medium with laser textured glass or glass-ceramic substrate |
| US5783797A (en) * | 1996-05-09 | 1998-07-21 | Seagate Technology, Inc. | Laser texturing of magnetic recording medium using a crystal material |
| US6020045A (en) * | 1996-06-05 | 2000-02-01 | Seagate Technology, Inc. | Textured magnetic recording medium having a transition zone |
| DE19654845C2 (de) * | 1996-12-27 | 2000-04-06 | Chromatron Laser Sys Gmbh | Vorrichtung zur Ablenkung von Lichtstrahlen |
| US5965215A (en) | 1997-01-15 | 1999-10-12 | Seagate Technology, Inc. | Method for laser texturing a landing zone and a data zone of a magnetic recording medium |
| US6207926B1 (en) | 1997-01-15 | 2001-03-27 | Seagate Technology Llc | Fiber optic laser texturing with optical probe feedback control |
| US6021032A (en) * | 1997-01-15 | 2000-02-01 | Seagate Technology, Inc. | Magnetic recording medium with laser textured data zone |
| US5952058A (en) * | 1997-01-15 | 1999-09-14 | Seagate Technology, Inc. | Laser texturing magnetic recording medium using fiber optics |
| US5853820A (en) * | 1997-06-23 | 1998-12-29 | Seagate Technology, Inc. | Controlled laser texturing glass-ceramic substrates for magnetic recording media |
| US5956217A (en) * | 1997-08-28 | 1999-09-21 | Seagate Technology, Inc. | Reference disk for determining glide height |
| US5837330A (en) * | 1997-08-28 | 1998-11-17 | Seagate Technology, Inc. | Dual fiber optic laser texturing |
| US6068728A (en) * | 1997-08-28 | 2000-05-30 | Seagate Technology, Inc. | Laser texturing with reverse lens focusing system |
| US5861196A (en) * | 1997-09-25 | 1999-01-19 | Seagate Technology, Inc. | Laser texturing a glass or glass-ceramic substrate |
| US5945197A (en) * | 1997-10-27 | 1999-08-31 | Seagate Technology | Laser texturing of magnetic recording medium using multiple lens focusing |
| FR2786345B1 (fr) | 1998-11-24 | 2001-02-09 | Thomson Csf | Dispositif de cryptage quantique |
| US6093472A (en) * | 1999-06-23 | 2000-07-25 | Seagate Technology, Inc. | Magnetic recording medium with laser textured glass or glass-ceramic substrate |
| US6468596B1 (en) | 1999-07-15 | 2002-10-22 | Seagate Technology Llc | Laser-assisted in-situ fractionated lubricant and a new process for surface of magnetic recording media |
| US7149173B2 (en) * | 2000-10-17 | 2006-12-12 | Thales | Medium for recording optically readable data, method for making same and optical system reproducing said data |
| FR2824905B1 (fr) * | 2001-05-15 | 2003-08-29 | Thomson Csf | Gyrometre a fibre optique |
| JP4128113B2 (ja) * | 2003-06-30 | 2008-07-30 | オリオン機械株式会社 | 搾乳ユニットの自動搬送装置 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3944727A (en) * | 1972-10-24 | 1976-03-16 | Mca Discovision, Inc. | Video disc player with movable mirror for directing light beam onto reflective disc |
| FR2222665B1 (Direct) * | 1973-03-21 | 1975-10-31 | Thomson Brandt |
-
1975
- 1975-09-29 FR FR7529706A patent/FR2325951A1/fr active Granted
-
1976
- 1976-09-24 US US05/726,474 patent/US4139263A/en not_active Expired - Lifetime
- 1976-09-27 CA CA262,092A patent/CA1067999A/en not_active Expired
- 1976-09-27 GB GB40080/76A patent/GB1567642A/en not_active Expired
- 1976-09-29 DE DE19762643901 patent/DE2643901A1/de not_active Withdrawn
- 1976-09-29 JP JP51117060A patent/JPS5242702A/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5242702A (en) | 1977-04-02 |
| US4139263A (en) | 1979-02-13 |
| FR2325951B1 (Direct) | 1979-04-06 |
| CA1067999A (en) | 1979-12-11 |
| FR2325951A1 (fr) | 1977-04-22 |
| GB1567642A (en) | 1980-05-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 8110 | Request for examination paragraph 44 | ||
| 8128 | New person/name/address of the agent |
Representative=s name: PRINZ, E., DIPL.-ING. LEISER, G., DIPL.-ING., PAT. |
|
| 8139 | Disposal/non-payment of the annual fee |