KR100657251B1 - 광픽업장치 - Google Patents
광픽업장치 Download PDFInfo
- Publication number
- KR100657251B1 KR100657251B1 KR1020000001782A KR20000001782A KR100657251B1 KR 100657251 B1 KR100657251 B1 KR 100657251B1 KR 1020000001782 A KR1020000001782 A KR 1020000001782A KR 20000001782 A KR20000001782 A KR 20000001782A KR 100657251 B1 KR100657251 B1 KR 100657251B1
- Authority
- KR
- South Korea
- Prior art keywords
- objective lens
- light
- light source
- laser
- optical pickup
- 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
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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
- G11B7/1372—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
- G11B7/125—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
-
- 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
-
- 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
- G11B2007/13727—Compound lenses, i.e. two or more lenses co-operating to perform a function, e.g. compound objective lens including a solid immersion lens, positive and negative lenses either bonded together or with adjustable spacing
-
- 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
- G11B7/002—Recording, reproducing or erasing systems characterised by the shape or form of the carrier
- G11B7/0037—Recording, reproducing or erasing systems characterised by the shape or form of the carrier with discs
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Head (AREA)
- Lenses (AREA)
Abstract
Description
| 면 | 곡률반경 | 두께 | 글래스 |
| 물체면 | INFINITY | 0.000000 | |
| s1 | INFINITY | 0.250000 | BK7 |
| s2 | INFINITY | 16.26320 | |
| s3 | INFINITY | 6.000000 | BK7 |
| s4 | INFINITY | 3.000000 | |
| s5 | 99.276000 | 1.000000 | FD4 |
| s6 | 13.400000 | 2.000000 | BAF10 |
| s7 | -17.230000 | 5.000000 | |
| s8 | 2.249482 | 2.000000 | BACD5 |
| K: - 1.099197 A:0.540411E-02 B:-0.113820E-03 C:0.266830E-04 D:-0.287691E-04 E:0.502346E-05 F:-0.541172E-06 | |||
| s9 | -13.997487 | 0.800000 | FEL1 |
| s10 | INFINITY | 1.508124z1 | |
| s11 | INFINITY | 0.400000z2 | 'CG' |
| s12 | INFINITY | 0.000000 | |
| 상면 | INFINITY | 0.000000 | |
| 비구면식(수학식2 참조) | |||
| 굴절율/d선에서의 아베(Abbe) 수 v | BACD5 1.605256 / 61.3 FEL1 1.568949 / 45.8 FD4 1.805793 / 27.5 BAF10 1.694714 / 47.2 BK7 1.530196 / 64.2 'CG' 1.621462 / 31.0 | ||
| 입사동 지름(mm) | 3.96 | ||
| 파 장(nm) | 405 | ||
| 콜리메이팅렌즈 단품 초점거리 fc1, fc2(mm) 콜리메이팅렌즈 전체 초점거리 fc(mm) ∑1/(fi/vi) fc/fcl1 | -19.325, 11.149 24.994 0.0002 -1.293 | ||
| 대물렌즈 단품 초점거리 fo1, fo2 (mm) 대물렌즈 전체 초점거리 fo(mm) ∑1/(fi/vi) fc/fcl1 | 2.491, -7.009 3.352 0.0034 -0.478 | ||
| 파장 650nm 에서의 두께 | z1 : 1.451248 z2 : 0.6000000 | ||
| 면 | 곡률반경 | 두께 | 글래스 |
| 물체면 | INFINITY | INFINITY | |
| s1 | 14.800000 | 1.7 | BAF3 |
| s2 | -13.480000 | 1.3 | SF11 |
| s3 | -48.995000 | 3.5 | |
| s4 | INFINITY | 6.000000 | BK7 |
| s5 | INFINITY | 16.025691 | |
| s6 | INFINITY | 0.000000 | |
| 상면 | INFINITY | 0.000000 | |
| 굴절률/d선에서의 아베수 v | BAF : 1.579226 / 46.5 SF11: 1.776662 / 25.8 BK7 : 1.514520 / 64.2 | ||
| 파장 | 650nm | ||
| 콜리메이팅 단품 초점거리fc1, fc2(mm) 콜리메이팅렌즈 전체초점거리 fc(mm) | 12.454, -24.333 25.000 | ||
| Σ1/(fcvi) fc/fc2 | 0.00013 -1.027 | ||
Claims (15)
- 두께가 다른 제1, 제2광디스크에 대응하는 것으로 서로 다른 파장의 레이저 광을 발생하는 제1, 제2광원과;상기 광원들로 부터의 레이저 광을 미디어에 집속하는 것으로 네가티브 파워를 가지는 부분과 포지티브 파워를 가지는 부재가 하나로 접합되어 있는 대물렌즈와;상기 미디어에서 반사된 제1광원과 제2광원으로 부터의 레이저광을 수광하는 적어도 하나의 광검출기와;상기 제1, 제2광원과 상기 대물렌즈의 사이에 마련되는 콜리메이팅 렌즈를; 구비하며,상기 대물렌즈 전체의 전체 초점거리를 f, 네가티브 파워를 가지는 부분의 초점 거리를 fn이라 할 때, -0.8 < f/fn < 0 으로 표현되는 식을 만족하는 것을 특징으로 하는 광픽업장치.
- 두께가 다른 제1, 제2광디스크에 대응하는 것으로 서로 다른 파장의 레이저 광을 발생하는 제1, 제2광원과;상기 광원들로부터의 레이저 광을 미디어에 집속하는 것으로 네가티브 파워를 가지는 부분과 포지티브 파워를 가지는 부재가 하나로 접합되어 있는 대물렌즈와;상기 미디어에서 반사된 제1광원과 제2광원으로부터의 레이저광을 수광하는 적어도 하나의 광검출기와;상기 제1, 제2광원과 상기 대물렌즈의 사이에 마련되는 콜리메이팅 렌즈를; 구비하며,상기 대물렌즈의 광원측으로 부터 대물렌즈의 각 부분의 초점거리를 f1, f2 라 하고, 각 부분의 광학재료의 d 선에서의 아베수를 각각 v1, v2 라 할 때, 0 < 1/(f1ㆍv1) + 1/(f2ㆍv2 ) < 0.005 로 표현되는 부등식을 만족하는 것을 특징으로 하는 광픽업장치.
- 제 2 항에 있어서,상기 대물렌즈 전체의 전체 초점거리를 f, 네가티브 파워를 가지는 부분의 초점 거리를 fn이라 할 때, -0.8 < f/fn < 0 으로 표현되는 식을 만족하는 것을 특징으로 하는 광픽업장치.
- 제1항에 있어서,상기 대물렌즈의 일측면이 비구면으로 형성되는 것을 특징으로 하는 광픽업장치.
- 제1항에 있어서,상기 광검출기는 상기 제1광원과 제2광원으로 부터의 광을 공히 수광하는 것을 특징으로 하는 광픽업장치.
- 제2항에 있어서,상기 광검출기는 상기 제1광원과 제2광원으로 부터의 광을 공히 수광하는 것을 특징으로 하는 광픽업장치.
- 제1항에 있어서,상기 제1광원은 청색계열의 레이저를 발생하며, 제2광원은 적색계열의 레이저를 발생하는 것을 특징으로 하는 광픽업장치.
- 제7항에 있어서,상기 제 1 광원은 405nm 파장을 가지는 레이저를 발생하며, 제 2 광원은 650nm 파장을 가지는 레이저를 발생하는 것을 특징으로 하는 광픽업장치.
- 제2항 또는 제6항에 있어서,상기 제1광원은 청색계열의 레이저를 발생하며, 제2광원은 적색계열의 레이저를 발생하는 것을 특징으로 하는 광픽업장치.
- 제9항에 있어서,상기 제 1 광원은 405nm 파장을 가지는 레이저를 발생하며, 제 2 광원은 650nm 파장을 가지는 레이저를 발생하는 것을 특징으로 하는 광픽업장치.
- 제1항에 있어서,상기 제1광디스크의 기판 두께는 0.6mm 이하이며, 제2광디스크의 기판 두께는 0.6mm인 것을 특징으로 하는 광픽업장치.
- 제2항 또는 제6항에 있어서,상기 제1광디스크의 기판 두께는 0.6mm 이하이며, 제2광디스크의 기판 두께는 0.6mm인 것을 특징으로 하는 광픽업장치.
- 제2항에 있어서,상기 대물렌즈의 일측면이 비구면으로 형성되는 것을 특징으로 하는 광픽업장치.
- 제9항에 있어서,상기 제1광디스크의 기판 두께는 0.6mm 이하이며, 제2광디스크의 기판 두께는 0.6mm인 것을 특징으로 하는 광픽업장치.
- 제10항에 있어서,상기 제1광디스크의 기판 두께는 0.6mm 이하이며, 제2광디스크의 기판 두께는 0.6mm인 것을 특징으로 하는 광픽업장치.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020000001782A KR100657251B1 (ko) | 2000-01-14 | 2000-01-14 | 광픽업장치 |
| EP00307764A EP1117096B1 (en) | 2000-01-14 | 2000-09-08 | Optical pickup |
| DE60008691T DE60008691T2 (de) | 2000-01-14 | 2000-09-08 | Optische Abtastvorrichtung |
| CNB001290088A CN1159713C (zh) | 2000-01-14 | 2000-09-26 | 光学头 |
| US09/690,021 US6590851B1 (en) | 2000-01-14 | 2000-10-17 | Optical pickup for recording/reproducing optical discs of multiple thicknesses |
| JP2000387817A JP2001216678A (ja) | 2000-01-14 | 2000-12-20 | 光ピックアップ装置 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020000001782A KR100657251B1 (ko) | 2000-01-14 | 2000-01-14 | 광픽업장치 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR20010073413A KR20010073413A (ko) | 2001-08-01 |
| KR100657251B1 true KR100657251B1 (ko) | 2006-12-19 |
Family
ID=19638701
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1020000001782A Expired - Fee Related KR100657251B1 (ko) | 2000-01-14 | 2000-01-14 | 광픽업장치 |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US6590851B1 (ko) |
| EP (1) | EP1117096B1 (ko) |
| JP (1) | JP2001216678A (ko) |
| KR (1) | KR100657251B1 (ko) |
| CN (1) | CN1159713C (ko) |
| DE (1) | DE60008691T2 (ko) |
Families Citing this family (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001090795A1 (fr) * | 2000-05-23 | 2001-11-29 | Matsushita Electric Industrial Co., Ltd. | Lentille d'objectif et tete optique |
| JP2001356263A (ja) * | 2000-06-12 | 2001-12-26 | Pioneer Electronic Corp | 組み合わせ対物レンズ、光ピックアップ装置、光学式記録再生装置及び組み合わせ対物レンズ製造方法 |
| JP3810051B2 (ja) * | 2000-06-20 | 2006-08-16 | フジノン株式会社 | 光記録媒体用対物レンズおよびこれを用いた光ピックアップ装置 |
| WO2002033700A2 (en) * | 2000-10-16 | 2002-04-25 | Konica Corporation | Objective lens, coupling lens, light converging optical system, and optical pick-up apparatus |
| WO2002063619A1 (en) * | 2001-02-01 | 2002-08-15 | Fujitsu Limited | Optical storage device |
| JP4610118B2 (ja) * | 2001-03-30 | 2011-01-12 | Hoya株式会社 | 光ヘッド用対物レンズ |
| JP4373036B2 (ja) * | 2001-08-31 | 2009-11-25 | パイオニア株式会社 | 光ピックアップ |
| JP2003165272A (ja) * | 2001-11-30 | 2003-06-10 | Fuji Photo Film Co Ltd | 光情報記録媒体 |
| JP2003296959A (ja) * | 2002-03-26 | 2003-10-17 | Samsung Electro Mech Co Ltd | 波長選択性開口制限素子と波長選択性ビームスプリッタ及びそれを備えた光ピックアップ装置 |
| KR20040003908A (ko) * | 2002-07-04 | 2004-01-13 | 엘지전자 주식회사 | 슬림형 렌즈를 이용한 광 픽업 |
| TW200414177A (en) | 2002-12-10 | 2004-08-01 | Asahi Glass Co Ltd | Objective lens for optical information recording media |
| KR100509493B1 (ko) * | 2003-02-26 | 2005-08-22 | 삼성전자주식회사 | 호환형 광픽업 |
| EP1471514A3 (en) * | 2003-04-22 | 2006-10-04 | Konica Minolta Opto, Inc. | Optical pickup device, optical information recording and reproducing apparatus, expander lens, coupling lens and chromatic aberration correcting optical element |
| US7436750B2 (en) * | 2003-06-19 | 2008-10-14 | Call/Recall Inc. | Optical storage with ultra high storage capacity |
| KR100940205B1 (ko) | 2003-07-01 | 2010-02-10 | 삼성전자주식회사 | 호환형 광픽업 |
| JP4216155B2 (ja) * | 2003-09-19 | 2009-01-28 | フジノン株式会社 | 光記録媒体用対物光学系およびこれを用いた光ピックアップ装置 |
| US20060198279A1 (en) * | 2003-10-27 | 2006-09-07 | Konica Minolta Opto, Inc. | Optical pickup apparatus |
| JP4349520B2 (ja) * | 2003-10-27 | 2009-10-21 | フジノン株式会社 | 光記録媒体用対物光学系およびこれを用いた光ピックアップ装置 |
| TW200532676A (en) * | 2004-03-30 | 2005-10-01 | Hon Hai Prec Ind Co Ltd | Optical reading/writing system |
| JP2005322356A (ja) * | 2004-05-11 | 2005-11-17 | Canon Inc | 光ピックアップ装置 |
| JPWO2005117001A1 (ja) * | 2004-05-27 | 2008-04-03 | コニカミノルタオプト株式会社 | 対物光学系、光ピックアップ装置、及び光ディスクドライブ装置 |
| CN100370527C (zh) * | 2004-11-06 | 2008-02-20 | 鸿富锦精密工业(深圳)有限公司 | 半导体激光装置及采用该半导体激光装置的光学拾取装置 |
| KR100683888B1 (ko) | 2005-01-20 | 2007-02-15 | 삼성전자주식회사 | 광픽업 장치 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09236745A (ja) * | 1995-12-26 | 1997-09-09 | Ricoh Co Ltd | 光走査用レンズ及び光走査装置 |
| JPH11328719A (ja) * | 1998-04-04 | 1999-11-30 | Lg Electronics Inc | 光ピックアップ装置とそれを利用する光記録/再生装置 |
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| JPH01233411A (ja) | 1988-03-15 | 1989-09-19 | Seiko Epson Corp | 石英非球面レンズ、およびそれを構成要素とする光ビックアップヘッド |
| JPH0581698A (ja) | 1991-09-20 | 1993-04-02 | Sanyo Electric Co Ltd | 波長切換式光ピツクアツプ |
| JPH08184753A (ja) | 1994-12-28 | 1996-07-16 | Konica Corp | 光ディスク用光学系 |
| US5933401A (en) * | 1996-06-07 | 1999-08-03 | Samsung Electronics Co., Ltd. | Optical pickup having plural optical sources and plural optical detectors |
| JPH10106019A (ja) * | 1996-09-24 | 1998-04-24 | Nec Corp | 2波長分離型光ヘッド |
| TW525158B (en) * | 1997-03-13 | 2003-03-21 | Hitachi Ltd | Objective lens and optical head using the same |
| JPH11110806A (ja) | 1997-10-03 | 1999-04-23 | Seiko Epson Corp | 光学ヘッドおよび光記憶装置 |
| US6343058B1 (en) * | 1997-10-30 | 2002-01-29 | Ricoh Company, Ltd. | Optical pickup device applicable to two kinds of recording media with minimized deterioration of a beam spot |
| KR100278786B1 (ko) * | 1998-06-18 | 2001-01-15 | 구자홍 | 광기록매체와 광 기록/재생 방법 및 장치 |
| JP2000082232A (ja) * | 1998-06-24 | 2000-03-21 | Ricoh Co Ltd | 光ピックアップ装置 |
| DE69837920T2 (de) * | 1998-10-23 | 2008-04-03 | Samsung Electronics Co., Ltd., Suwon | Mit DVD und beschreibbarer CD kompatibler optischer Abtastkopf mit holographischer Ringlinse |
| JP2000195087A (ja) * | 1998-12-25 | 2000-07-14 | Matsushita Electric Ind Co Ltd | 光ヘッド及び当該光ヘッドを用いた光ディスク装置 |
-
2000
- 2000-01-14 KR KR1020000001782A patent/KR100657251B1/ko not_active Expired - Fee Related
- 2000-09-08 EP EP00307764A patent/EP1117096B1/en not_active Expired - Lifetime
- 2000-09-08 DE DE60008691T patent/DE60008691T2/de not_active Expired - Lifetime
- 2000-09-26 CN CNB001290088A patent/CN1159713C/zh not_active Expired - Fee Related
- 2000-10-17 US US09/690,021 patent/US6590851B1/en not_active Expired - Lifetime
- 2000-12-20 JP JP2000387817A patent/JP2001216678A/ja active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09236745A (ja) * | 1995-12-26 | 1997-09-09 | Ricoh Co Ltd | 光走査用レンズ及び光走査装置 |
| JPH11328719A (ja) * | 1998-04-04 | 1999-11-30 | Lg Electronics Inc | 光ピックアップ装置とそれを利用する光記録/再生装置 |
Non-Patent Citations (2)
| Title |
|---|
| 09236745 |
| 11328719 |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1117096A3 (en) | 2002-07-03 |
| KR20010073413A (ko) | 2001-08-01 |
| CN1306273A (zh) | 2001-08-01 |
| JP2001216678A (ja) | 2001-08-10 |
| EP1117096B1 (en) | 2004-03-03 |
| EP1117096A2 (en) | 2001-07-18 |
| US6590851B1 (en) | 2003-07-08 |
| DE60008691D1 (de) | 2004-04-08 |
| CN1159713C (zh) | 2004-07-28 |
| DE60008691T2 (de) | 2005-03-10 |
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