KR100656161B1 - 광픽업 장치 - Google Patents
광픽업 장치 Download PDFInfo
- Publication number
- KR100656161B1 KR100656161B1 KR1020050111878A KR20050111878A KR100656161B1 KR 100656161 B1 KR100656161 B1 KR 100656161B1 KR 1020050111878 A KR1020050111878 A KR 1020050111878A KR 20050111878 A KR20050111878 A KR 20050111878A KR 100656161 B1 KR100656161 B1 KR 100656161B1
- Authority
- KR
- South Korea
- Prior art keywords
- light
- light source
- optical
- objective lens
- photodetector
- Prior art date
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Classifications
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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
- G11B7/12—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
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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
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/125—Optical beam sources therefor, e.g. laser control circuitry specially adapted for optical storage devices; Modulators, e.g. means for controlling the size or intensity of optical spots or optical traces
- G11B7/127—Lasers; Multiple laser arrays
- G11B7/1275—Two or more lasers having different wavelengths
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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
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/13—Optical detectors therefor
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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
- G11B7/12—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
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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
- G11B7/12—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
- G11B7/1372—Lenses
- G11B7/1374—Objective lenses
-
- 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
- G11B7/1395—Beam splitters or combiners
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Head (AREA)
Abstract
Description
Claims (4)
- 소정 파장의 광을 출사하는 광원과, 상기 광원에서 출사된 광을 수광하여 상기 광원의 출력을 모니터 하기 위한 피드백 광검출기와, 상기 광원으로부터 입사되는 광을 집속하여 광디스크에 스폿을 형성하는 대물렌즈를 구비하는 광픽업 장치에 있어서,상기 광원과 피드백 광검출기 사이의 광경로 상에는 특정 편광만을 투과시키는 편광필터가 배치되는 것을 특징으로 하는 광픽업 장치.
- 제1항에 있어서,상기 광픽업 장치는 상기 광원과 대물렌즈 사이의 광경로 상에 배치되어 상기 광원에서 입사되는 광 또는 상기 광디스크에서 반사되는 광의 편광을 변환하는 1/4 파장판을 더 구비하는 것을 특징으로 하는 광픽업 장치.
- 제2항에 있어서,상기 편광필터는 S편광은 투과시키고, P편광은 차단하는 것을 특징으로 하는 광픽업 장치.
- 소정 파장의 광을 출사하는 광원;과상기 광원에서 출사된 광을 수광하여 상기 광원의 출력을 모니터 하기 위한 피드백 광검출기;와상기 광원으로부터 입사되는 광을 집속하여 광디스크에 스폿을 형성하는 대물렌즈;와상기 광원과 피드백 광검출기 사이의 광경로 상에 배치되는 빔스프리터;와상기 빔스프리터와 대물렌즈 사이의 광경로 상에 배치되는 1/4파장판;과상기 광원과 피드백 광검출기 사이의 광경로 상에 배치되어 광의 편광 방향에 따라 상기 광원으로부터 직접 입사되는 광은 투과시키고, 상기 광디스크와 상기 광원에서 반사된 후 입사되는 광은 차단하는 편광필터;를포함하는 것을 특징으로 하는 광픽업 장치.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020050111878A KR100656161B1 (ko) | 2005-11-22 | 2005-11-22 | 광픽업 장치 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020050111878A KR100656161B1 (ko) | 2005-11-22 | 2005-11-22 | 광픽업 장치 |
Publications (1)
Publication Number | Publication Date |
---|---|
KR100656161B1 true KR100656161B1 (ko) | 2006-12-13 |
Family
ID=37732842
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1020050111878A KR100656161B1 (ko) | 2005-11-22 | 2005-11-22 | 광픽업 장치 |
Country Status (1)
Country | Link |
---|---|
KR (1) | KR100656161B1 (ko) |
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2005
- 2005-11-22 KR KR1020050111878A patent/KR100656161B1/ko not_active IP Right Cessation
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