KR0171079B1 - 서로 다른 파장의 레이저 비임을 순차적으로 각각 발생시켜 한쪽면에 복수개의 기록층을 가지는 광디스크를 기록/재생하는 광픽업 시스템 - Google Patents
서로 다른 파장의 레이저 비임을 순차적으로 각각 발생시켜 한쪽면에 복수개의 기록층을 가지는 광디스크를 기록/재생하는 광픽업 시스템 Download PDFInfo
- Publication number
- KR0171079B1 KR0171079B1 KR1019940010433A KR19940010433A KR0171079B1 KR 0171079 B1 KR0171079 B1 KR 0171079B1 KR 1019940010433 A KR1019940010433 A KR 1019940010433A KR 19940010433 A KR19940010433 A KR 19940010433A KR 0171079 B1 KR0171079 B1 KR 0171079B1
- Authority
- KR
- South Korea
- Prior art keywords
- recording
- optical
- laser
- laser beams
- hologram
- Prior art date
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- 230000003287 optical effect Effects 0.000 title claims abstract description 54
- 239000010410 layer Substances 0.000 description 21
- 239000011347 resin Substances 0.000 description 14
- 229920005989 resin Polymers 0.000 description 14
- 239000011247 coating layer Substances 0.000 description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
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
- G11B7/1353—Diffractive elements, e.g. holograms or gratings
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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
- G11B7/1356—Double or multiple prisms, i.e. having two or more prisms in cooperation
-
- 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
-
- 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
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/2403—Layers; Shape, structure or physical properties thereof
- G11B7/24035—Recording layers
- G11B7/24038—Multiple laminated recording layers
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Head (AREA)
- Optical Recording Or Reproduction (AREA)
Abstract
Description
Claims (1)
- 한쪽면에 복수개의 기록층을 가지는 광디스크를 기록/재생하는 광 픽업 시스템에 있어서, 서로 다른 파장의 레이저 빔을 순차적으로 각각 발생시키며 서로 수직방향으로 배열설치된 제 1 및 제 2 홀로그램소자와; 상기 제 1 및 제 2 홀로그램소자의 광 경로상에 위치되며 상기 광디스크를 향해 대면하는 위치의 제 1 홀로그램소자로부터 발생된 레이저 비임은 전투과시키고, 수직방향의 제 2 홀로그램소자로부터 발생된 레이저 비임은 전반사시키며, 상기 광디스크의 각 기록면으로부터 반사된 광비임의 각각을 상기 제 1 및 제 2 홀로그램소자를 향해 전투과 또는 전반사시키는 유전체막이 코팅된 유전체 프리즘과; 상기 유전체 프리즘과 광디스크사이에 위치되어, 상기 유전체 프리즘을 투과하는 광비임을 상기 광디스크의 각각의 기록면상에 접속하는 접속수단을 포함하고; 상기 제 1 및 제 2 홀로그램소자는 상기 레이저 비임의 어느 하나를 발생하는 레이저 다이오드와, 이 레이저 다이오드로 부터 발생된 광비임을 상기 유전체 프리즘을 향해 주사하고, 상기 광디스크로부터 반사된 광을 회절시키는 홀로그램과, 상기 회절광으로부터 포커싱 신호 및 트랙킹 신호를 검출하는 포토 다이오드를 각각 가지는 것을 특징으로 하는 광 픽업 시스템.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019940010433A KR0171079B1 (ko) | 1994-05-13 | 1994-05-13 | 서로 다른 파장의 레이저 비임을 순차적으로 각각 발생시켜 한쪽면에 복수개의 기록층을 가지는 광디스크를 기록/재생하는 광픽업 시스템 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019940010433A KR0171079B1 (ko) | 1994-05-13 | 1994-05-13 | 서로 다른 파장의 레이저 비임을 순차적으로 각각 발생시켜 한쪽면에 복수개의 기록층을 가지는 광디스크를 기록/재생하는 광픽업 시스템 |
Publications (2)
Publication Number | Publication Date |
---|---|
KR950034118A KR950034118A (ko) | 1995-12-26 |
KR0171079B1 true KR0171079B1 (ko) | 1999-04-15 |
Family
ID=19382981
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019940010433A KR0171079B1 (ko) | 1994-05-13 | 1994-05-13 | 서로 다른 파장의 레이저 비임을 순차적으로 각각 발생시켜 한쪽면에 복수개의 기록층을 가지는 광디스크를 기록/재생하는 광픽업 시스템 |
Country Status (1)
Country | Link |
---|---|
KR (1) | KR0171079B1 (ko) |
-
1994
- 1994-05-13 KR KR1019940010433A patent/KR0171079B1/ko not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
KR950034118A (ko) | 1995-12-26 |
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