KR900000018B1 - 광 헤 드 - Google Patents
광 헤 드 Download PDFInfo
- Publication number
- KR900000018B1 KR900000018B1 KR1019840007046A KR840007046A KR900000018B1 KR 900000018 B1 KR900000018 B1 KR 900000018B1 KR 1019840007046 A KR1019840007046 A KR 1019840007046A KR 840007046 A KR840007046 A KR 840007046A KR 900000018 B1 KR900000018 B1 KR 900000018B1
- Authority
- KR
- South Korea
- Prior art keywords
- barrel
- frame
- light
- optical
- collimator 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.)
- Expired
Links
Images
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
- G11B7/1381—Non-lens elements for altering the properties of the beam, e.g. knife edges, slits, filters or stops
-
- 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
- G11B7/085—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam into, or out of, its operative position or across tracks, otherwise than during the transducing operation, e.g. for adjustment or preliminary positioning or track change or selection
- G11B7/08547—Arrangements for positioning the light beam only without moving the head, e.g. using static electro-optical elements
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- 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
- G11B7/0916—Foucault or knife-edge methods
-
- 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
- G11B7/123—Integrated head arrangements, e.g. with source and detectors mounted on the same substrate
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Head (AREA)
- Lens Barrels (AREA)
Abstract
Description
Claims (4)
- 광빔을 발생하는 광원과, 광원을 지지하는 베이스(72)와 선팽창율 γ를 가지고 베이스를 지지하는 후레임(74)과, 선팽창율 β를 가지고 후레임(74)내에 배치된 광학경통(76)과, 경통내에 배치 및 고정되어 광원에서 발생된 광빔을 콜리메이트하는 콜리메이터렌즈 광학계로 구성되며, 후레임에 고정된 경통을 지지하는 적어도 1개의 지지수단(75)은 경통에 점접촉되고, 경통의 고정점에서 콜리메이터렌즈 광학계의 앞측 주점까지의 거리를 A0라 하고, 경통의 고정점에서 광원까지의 거리를 b라 하면 후레임(74) 및 경통(76)은 부등식 β>γ를 충족하며, (B×γ-A0×γ)가 실질적으로 0이 되는 재료로 형성되는 것을 특징으로 하는 광헤드.
- 제1항에 있어서, 상기 경통(76)의 고정점에서 상기 콜리메이터렌즈 광학계의 렌즈(32)까지의 거리를 a1이라 하면, 후레임(74) 및 경통(76)은 (B×γ-A1×γ)가 실질적으로 0이 되는 재료로 형성되는 것을 특징으로 하는 광헤드.
- 제1항에 있어서, 상기 베이스(72)의 선팽창율을 α라 하면, 베이스(72), 후레임(74) 및 경통(76)은 부등식 β>γ>α 혹은 α>γ>β를 충족하며, (B×γ-A0×γ)가 실질적으로 0이 되는 재료로 형성되는 것을 특징으로 하는 광헤드.
- 제1항에 있어서, 베이스(72), 후레임(74) 및 경통(76)은 동일재료로 형성되는 것을 특징으로 하는 광헤드.
Applications Claiming Priority (8)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58215837A JPS60107743A (ja) | 1983-11-16 | 1983-11-16 | 光学ヘッド |
| JP??215837 | 1983-11-16 | ||
| JP215837 | 1983-11-16 | ||
| JP227526 | 1983-12-01 | ||
| JP58227526A JPS60119644A (ja) | 1983-12-01 | 1983-12-01 | 光学ヘッド |
| JP01878 | 1984-03-29 | ||
| JP61878 | 1984-03-29 | ||
| JP59061878A JPS60205839A (ja) | 1984-03-29 | 1984-03-29 | 光学ヘツド |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR850004150A KR850004150A (ko) | 1985-07-01 |
| KR900000018B1 true KR900000018B1 (ko) | 1990-01-18 |
Family
ID=27297661
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019840007046A Expired KR900000018B1 (ko) | 1983-11-16 | 1984-11-10 | 광 헤 드 |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US4641023A (ko) |
| EP (1) | EP0146762B1 (ko) |
| KR (1) | KR900000018B1 (ko) |
| DE (1) | DE3486047T2 (ko) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4669842A (en) * | 1983-12-08 | 1987-06-02 | Canon Kabushiki Kaisha | Projection optical device |
| JPH0685233B2 (ja) * | 1986-06-27 | 1994-10-26 | 株式会社リコー | 半導体レ−ザ−光源装置 |
| NL8700440A (nl) * | 1987-02-23 | 1988-09-16 | Philips Nv | Optische inrichting bevattende een houder met daarin aangebracht een optisch stelsel. |
| US7286153B1 (en) * | 1991-10-11 | 2007-10-23 | Hitachi, Ltd. | Three-dimensional recording and reproducing apparatus |
| JP3266627B2 (ja) * | 1991-10-11 | 2002-03-18 | 株式会社日立製作所 | 情報再生装置 |
| US5255015A (en) * | 1992-06-03 | 1993-10-19 | Eastman Kodak Company | Athermally compensated optical head for a laser scanner |
| EP0660467B1 (de) * | 1993-12-22 | 1997-03-19 | Siemens Aktiengesellschaft | Optoelektronisches Bauelement und Verfahren zu dessen Herstellung |
| US5870133A (en) * | 1995-04-28 | 1999-02-09 | Minolta Co., Ltd. | Laser scanning device and light source thereof having temperature correction capability |
| US6243350B1 (en) | 1996-05-01 | 2001-06-05 | Terastor Corporation | Optical storage systems with flying optical heads for near-field recording and reading |
| AU2929397A (en) * | 1997-04-29 | 1998-11-24 | Terastor Corporation | Electro-optical storage system with flying head for near-field recordin g and reading |
| JP2004206760A (ja) * | 2002-12-24 | 2004-07-22 | Sankyo Seiki Mfg Co Ltd | 光ヘッド装置 |
| US20040170109A1 (en) * | 2003-02-28 | 2004-09-02 | Matsushita Electric Industrial Co., Ltd. | Optical pickup |
| CN109739609B (zh) * | 2019-01-03 | 2021-01-15 | 腾讯科技(深圳)有限公司 | 图像处理方法、装置、计算机可读存储介质和计算机设备 |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE339895C (de) * | 1918-10-09 | 1921-08-17 | Optique Et De Mecanique De Hau | Anordnung zum Ausgleich von Temperatureinfluessen auf die wahre oder scheinbare Brennweite von optischen Elementen |
| US2533478A (en) * | 1947-08-13 | 1950-12-12 | Eastman Kodak Co | Temperature compensating means for lens mounts |
| US4236790A (en) * | 1978-05-15 | 1980-12-02 | Smith Ronald D | Temperature compensated positioning device |
| NL182031C (nl) * | 1980-11-06 | 1987-12-16 | Philips Nv | Optisch stelsel dat een gekollimeerde lichtbundel levert. |
-
1984
- 1984-11-10 KR KR1019840007046A patent/KR900000018B1/ko not_active Expired
- 1984-11-14 EP EP84113779A patent/EP0146762B1/en not_active Expired - Lifetime
- 1984-11-14 DE DE8484113779T patent/DE3486047T2/de not_active Expired - Fee Related
- 1984-11-16 US US06/671,909 patent/US4641023A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| EP0146762B1 (en) | 1993-01-20 |
| DE3486047T2 (de) | 1993-07-01 |
| KR850004150A (ko) | 1985-07-01 |
| DE3486047D1 (de) | 1993-03-04 |
| EP0146762A1 (en) | 1985-07-03 |
| US4641023A (en) | 1987-02-03 |
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