KR100196923B1 - 2광원 광축일치 홀로그램 디스크 호환 광픽업 - Google Patents
2광원 광축일치 홀로그램 디스크 호환 광픽업 Download PDFInfo
- Publication number
- KR100196923B1 KR100196923B1 KR1019960042121A KR19960042121A KR100196923B1 KR 100196923 B1 KR100196923 B1 KR 100196923B1 KR 1019960042121 A KR1019960042121 A KR 1019960042121A KR 19960042121 A KR19960042121 A KR 19960042121A KR 100196923 B1 KR100196923 B1 KR 100196923B1
- Authority
- KR
- South Korea
- Prior art keywords
- hologram
- light
- disc
- objective lens
- optical
- 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 - Fee Related
Links
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
- G11B7/1353—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
- G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
- G11B7/1359—Single prisms
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Head (AREA)
Abstract
Description
Claims (3)
- 홀로그램을 이용한 디스크 호환 광픽업에 있어서,각각 파장과 방사각이 다른 광을 발생하기 위한 제1 및 제2광원과,상기한 제 1, 제 2 광원의 광축을 일치시키는 수단과,상기한 제 1 및 제 2 광원에서 방사되는 광을 두께가 다른 디스크에 각각 집속하기 위한 대물렌즈와,상기한 디스크에서 반사되는 반사광을 회절시키는 홀로그램, 그리고상기한 홀로그램에서 회절되는 반사광을 수광하여 전기 신호를 검출하는 광검출기가 구비된 것을 특징으로 하는 홀로그램을 이용한 디스크 호환 광픽업.
- 제 1 항에 있어서, 상기한 제1광원이 상기한 대물렌즈의 광축상에 배치되어 있고,상기한 제 1, 제 2 광원의 광축을 일치시키는 수단이 상호 평행하고 광축에 45°경사져서 각각 제 1, 제 2 광원에서 출사되는 광을 투과 및/또는 반사시키는 2개의 경사면을 갖는 프리즘으로 구비된 것을 특징으로 하는 홀로그램을 이용한 디스크 호환 광픽업.
- 제 2 항에 있어서, 상기한 프리즘의 일측 경사면이 제 1 광원의 파장대를 전투과시키는 동시에 제 2 광원의 파장대를 전반사시키도록 코팅 처리되어 있고, 그 타측 경사면이 제 2 광원의 파장대를 전반사시키도록 코팅 처리되어 있는 것을 특징으로 하는 홀로그램을 이용한 디스크 호환 광픽업.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019960042121A KR100196923B1 (ko) | 1996-09-24 | 1996-09-24 | 2광원 광축일치 홀로그램 디스크 호환 광픽업 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019960042121A KR100196923B1 (ko) | 1996-09-24 | 1996-09-24 | 2광원 광축일치 홀로그램 디스크 호환 광픽업 |
Publications (2)
Publication Number | Publication Date |
---|---|
KR19980022836A KR19980022836A (ko) | 1998-07-06 |
KR100196923B1 true KR100196923B1 (ko) | 1999-06-15 |
Family
ID=19475161
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019960042121A Expired - Fee Related KR100196923B1 (ko) | 1996-09-24 | 1996-09-24 | 2광원 광축일치 홀로그램 디스크 호환 광픽업 |
Country Status (1)
Country | Link |
---|---|
KR (1) | KR100196923B1 (ko) |
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1996
- 1996-09-24 KR KR1019960042121A patent/KR100196923B1/ko not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
KR19980022836A (ko) | 1998-07-06 |
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