KR100224895B1 - 호환형 광픽업장치 - Google Patents
호환형 광픽업장치 Download PDFInfo
- Publication number
- KR100224895B1 KR100224895B1 KR1019960064016A KR19960064016A KR100224895B1 KR 100224895 B1 KR100224895 B1 KR 100224895B1 KR 1019960064016 A KR1019960064016 A KR 1019960064016A KR 19960064016 A KR19960064016 A KR 19960064016A KR 100224895 B1 KR100224895 B1 KR 100224895B1
- Authority
- KR
- South Korea
- Prior art keywords
- light
- hologram
- light source
- hologram element
- recording medium
- Prior art date
Links
- 230000003287 optical effect Effects 0.000 title claims abstract description 43
- 201000009310 astigmatism Diseases 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims description 6
- 239000004973 liquid crystal related substance Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000002093 peripheral effect 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
- G11B7/1353—Diffractive elements, e.g. holograms or gratings
-
- 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
- G11B7/131—Arrangement of detectors in a multiple array
-
- 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
- G11B2007/0003—Recording, reproducing or erasing systems characterised by the structure or type of the carrier
- G11B2007/0006—Recording, reproducing or erasing systems characterised by the structure or type of the carrier adapted for scanning different types of carrier, e.g. CD & DVD
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Head (AREA)
- Optical Recording Or Reproduction (AREA)
Abstract
Description
Claims (4)
- 광을 출사하는 광원(111);상기 광원(111)에서 출사된 광을 다른 두께의 기록매체(10a)(10b)의 기록면에 각각 집속시키는 대물렌즈(119);상기 광원(111)과 대물렌즈(119) 사이의 광경로상에 배치되어 상기 광원(111)쪽에서 입사하는 광은 투과시키고, 두꺼운 기록매체(10b)에서 반사된 광을 2개로 분리할 수 있도록 2분할되어 있고 그 2개의 광을 소정각도로 회절시키는 제1홀로그램패턴(130a)이 형성된 제1홀로그램소자와, 얇은 기록매체(10a)에서 반사된 광을 2개로 분리할 수 있도록 2분할되어 있고 그 2개의 광을 또 다른 소정각도로 회절시키는 제2홀로그램패턴(130b)이 형성된 제2홀로그램소자로 이루어진 홀로그램수단(130);상기 제1홀로그램소자와 상기 제2홀로그램소자 중 어느 하나에 형성된 비점수차를 발생시키는 비점수차패턴;상기 제1홀로그램소자에 의해 회절된 광의 초점위치에 배치되며, 서로 대칭되는 A1, B1, C1, D1 영역으로 이루어진 제1광검출기(140); 및상기 제2홀로그램소장에 의해 회절된 광의 초점위치에 배치되며, 서로 대칭되는 A2, B2, C2, D2 영역으로 이루어진 제2광검출기(150);를 포함하여 된 것을 특징으로 하는 호환형 광픽업장치.
- 제1항에 있어서,상기 제1홀로그램소자와 상기 제2홀로그램소자는 일체형으로 된 것을 특징으로 하는 호환형 광픽업장치.
- 제1항에 있어서, 상기 광원(111)과 상기 대물렌즈(119) 사이의 광경로상에는 입사하는 광을 3 개로 회절 분리시키는 회절격자(350)가 더 구비된 것을 특징으로 하는 호환형 광픽업장치.
- 제1항에 있어서,상기 포커스에러신호(F.E)는 (A1+C1)-(D1+B1)로 검출하고,상기 트랙에러신호(T.E)는 (A1+C1)-(D1+B1)로 검출하며,데이터신호(R.F)는 (A1+B1+C1+D1)+(A2+B2+C2+D2)로 검출하는 것을 특징으로 하는 광 픽업 장치.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019960064016A KR100224895B1 (ko) | 1996-12-10 | 1996-12-10 | 호환형 광픽업장치 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019960064016A KR100224895B1 (ko) | 1996-12-10 | 1996-12-10 | 호환형 광픽업장치 |
Publications (2)
Publication Number | Publication Date |
---|---|
KR19980045805A KR19980045805A (ko) | 1998-09-15 |
KR100224895B1 true KR100224895B1 (ko) | 1999-10-15 |
Family
ID=19487064
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019960064016A KR100224895B1 (ko) | 1996-12-10 | 1996-12-10 | 호환형 광픽업장치 |
Country Status (1)
Country | Link |
---|---|
KR (1) | KR100224895B1 (ko) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0798431A (ja) * | 1993-02-01 | 1995-04-11 | Matsushita Electric Ind Co Ltd | 対物レンズ及び集光光学系及び光ヘッド装置及び光ディスク装置及び光ディスク及び顕微鏡及び露光装置 |
-
1996
- 1996-12-10 KR KR1019960064016A patent/KR100224895B1/ko not_active IP Right Cessation
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0798431A (ja) * | 1993-02-01 | 1995-04-11 | Matsushita Electric Ind Co Ltd | 対物レンズ及び集光光学系及び光ヘッド装置及び光ディスク装置及び光ディスク及び顕微鏡及び露光装置 |
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Publication number | Publication date |
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KR19980045805A (ko) | 1998-09-15 |
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