TW200818186A - Compatible optical recording medium - Google Patents
Compatible optical recording medium Download PDFInfo
- Publication number
- TW200818186A TW200818186A TW096134336A TW96134336A TW200818186A TW 200818186 A TW200818186 A TW 200818186A TW 096134336 A TW096134336 A TW 096134336A TW 96134336 A TW96134336 A TW 96134336A TW 200818186 A TW200818186 A TW 200818186A
- Authority
- TW
- Taiwan
- Prior art keywords
- wavelength
- recording medium
- optical recording
- optical
- numerical aperture
- 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
- G11B7/007—Arrangement of the information on the record carrier, e.g. form of tracks, actual track shape, e.g. wobbled, or cross-section, e.g. v-shaped; Sequential information structures, e.g. sectoring or header formats within a track
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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
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/2407—Tracks or pits; Shape, structure or physical properties thereof
- G11B7/24073—Tracks
- G11B7/24079—Width or depth
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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
- G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
-
- 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
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/2407—Tracks or pits; Shape, structure or physical properties thereof
-
- 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
- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
- G11B7/242—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers
- G11B7/243—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising inorganic materials only, e.g. ablative layers
- G11B2007/24302—Metals or metalloids
- G11B2007/24308—Metals or metalloids transition metal elements of group 11 (Cu, Ag, Au)
-
- 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
- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
- G11B7/242—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers
- G11B7/243—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising inorganic materials only, e.g. ablative layers
- G11B2007/24302—Metals or metalloids
- G11B2007/24314—Metals or metalloids group 15 elements (e.g. Sb, Bi)
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Head (AREA)
- Optical Record Carriers And Manufacture Thereof (AREA)
- Optical Recording Or Reproduction (AREA)
- Diffracting Gratings Or Hologram Optical Elements (AREA)
Description
200818186 九、發明說明: 【發明所屬之技術領域】 是可之格式,其設計方式 、、念哭、吞」和"己錄恭加以閱讀,並關於光學才人 立為ΣΣίϊί等數位資料之分佈於今日光學記錄媒體,確 立為主要刀佈波迢。惟此舉意味 能夠立即為其客戶提供最需要標題頭不而需=購大里Μ以便 需,干解決方案,為製造所 内備用之特殊記錄器進^加二錄製。錄製是以店 接至網路之特殊客戶記錄器機’或利用連 寫於可記錄勘,封歧DVD且把育料書 視頻(rom)碟片,即使是特殊完工t可己二= 之1^ 對於光學記錄媒體。 傅令彳1先學拾波單位,相 為確立上述解決方案,做為又一 記錄媒體必須盡量與許多標準播放器和=記錄光學 =不是播放器的問題,卻因記錄容。,此 保濩機制,記錄器内所用一些 同。做為複製 結構之推挽訊號時,不能從ί示為;讀;體源自凹溝 =資料,指示為可記錄光學記錄媒體以 【發明内容】 本發明之目的,在於擬議可記錄 式,具有大部份播放器和記錄器所用唯讀n錄f體用之格 觀。員九學記錄媒體之外 200818186 記錄層,敏於在第一波達成是f用光,記錄媒體’具有 錄曾具有凹溝結構,其dt敏於在第二波長閱讀’記 第-繞射階的繞射效時’凹溝結構具有進入 長時,具有進入第_刀大到务生推挽訊號,而在第二波 本發的繞射效率幾近零。 405nm) ^ 書寫。光學記錚^笨‘^、’曰在以第二波長(例如65〇nm) 長。同時選擇亲層㈣,敏於記錄用之第一波 媒體之設計用第二,閱讀。光學記錄 此目的,由光學記件拔牌,可標準播放器或記錄器閱讀。為 —ΐί:、ί媒體發生之推挽訊號具有如下性能: 一;長時,推挽訊號強,為追蹤所必須· 波器不弟以? 幾近零,以免與記錄器拾 結構之另一追蹤方^ p〇j微分相位,測)或以不需凹溝 少50nm A作你^為之。第一波長和第二波長相差,以至 波長之幾近從第—波長之大繞射效率過渡到第二 類似Ϊ讀舰,且與大部份賊神記細目容 媒體 列凹波長來記錄,而使用65Gnm波長來閱讀, :溝構取好疋凹溝寬度在12〇腿以下,凹溝寬度在 结射it i在4〇5nm時,如此凹溝結構進入第一繞射階的 =射效率,充分大到發生推挽訊號,而65〇nm時,進入 、、堯射階的繞射效率幾近零。 ,錄裝置之光學拾波器為了記錄在光學記錄媒體上,旨 在以第二波長和第二數值孔徑閱讀,具有光源以供發生第一 波長之光束,其第二數值孔徑賦予之數值孔徑,乘以第一 長和第二波長之比。 如此一來,光學記錄媒體上之雷射光點尺寸大小,基本 上與以第二數值孔徑的第二波長閱讀光學記錄媒體用之拾波 6 200818186 器的雷射光點相同。例如’以記錄波長4〇5nm,閱讀波長 650mn,閱讀數值孔徑0.6而言,記錄數值孔徑為'〇6: 405nm/605mn=0.374。由於低ΝΑ (數值孔徑),光學拾波 器很容易製作,因為小ΝΑ容許光圈有較大機械性公差。另 外,可藉降低光束品質因數Μ2或脫離焦點操作,適應雷射光 點尺寸。 為更佳明瞭本發明起見,茲參照附圖詳述如下。須知本 發明不限於此具體例,而其特點亦可權宜加以組合和/戋修 改,不悖本發明之範圍。 < ^
【實施方式】 茲參見以波長大約650nm閱讀之DVD般的光學記錄 體說明本發明。當然,本發明之-般概念,可朗於其他類 型之光學記錄媒體。 、 、第1圖簡略表示本發明光學記錄媒體之結構。聚碳酸酯 被覆層1保護記錄層2。記錄層2包含雜、無機材料或相 位變化材料’敏於在大約4G5mn的波長做記錄,並得以在大 約650nm波長讀出。此類材料之例為AgSb,如Fang等人於 〈無機AgSb記錄薄膜之光學性能〉所揭,見Appl. phys. 261917 (2006)。此材料之反射係數只從4〇〇nm至獅⑽ 變異。位於記錄層2下方的是反射性鋁層3,具有凹溝 =構、4。記錄標記5係利用位於凹溝4間的物鏡7聚焦,以 j光束6在405nm所發生。凹溝4具有DVD用之特別小 例如lOOnm ’以及小深度,例如伽m。此可保證由光 予扣波益所得推挽訊號在405nm強,在65〇nm弱。 =錄在光學記錄媒體上,使用以波長4Q5nm操作之光 早位。光學拾波單位設計成數值孔徑ΝΑ=〇 374。音 鱗碰上_射光歡小,與波長6Q5nm和數值孔 的標準DV〇記錄器之雷射光點大小類似,因 .別= 〇.6x 405nm/605nm。由於低NA,特殊光學拾波器 7 200818186 單位,容易製作,因為小ΝΑ容許光圈有較大機械性公差。 第2圖表示本發明光學記錄媒體在波長65〇nm的繞射效 率模擬結果。模擬是基於假設平面波在法線入射,不論是TE 或TM極化。光學記錄媒體的磁軌間距74〇nm,凹溝深度 40nm。光學記錄媒體類似第1圖所示,惟無記錄層2。推挽 成號強度主要視繞射入第一和負第一繞射階的輻射強度而 定,假設第0階較第一階強。模擬表示對凹溝寬度lOOnm而 言,在650nm進入第一階的繞射效率,對TE和TM都在2 %以下。意即推挽訊號很小。
第3圖表示光學記錄媒體在波長405nm時繞射效率的模 擬結果。模擬是基於第2圖模擬的同樣假設。可見與在 650nm的結果相反的是,在405nm進入第一階的繞射效率, 對TM為16%,意即推挽訊號強。推挽訊號的訊號強度,可 在發生推挽訊號用的檢測器之前,使用極化濾波器進一步增 強,阻礙光的TE部份。 【圖式簡單說明】 第1圖表示本發明光學記錄媒體之結構; 第2圖表示本發明光學記錄媒體在波長650 nm的繞射效 率模擬結果; 第3圖表示本發明光學記錄媒體在波長405 nm的繞射效 率模擬結果。 【主要元件符號說明】 1 被覆層 2 記錄層 3 反射性铭層 4 凹溝結構 5 記錄標記 6 雷射光束 7 物鏡 8
Claims (1)
- 200818186 十、申請專利範圍: 射階的繞射效率幾近零者。 & $進入弟一繞 2·如申請專利範圍第丨項之光學記錄媒體, 和弟二波長間之差異,大約50nm者。 ,、中弟-波長 、胖請^翻第1或2項之光學記錄舰,其中第-波長在405nm左右,而第二波長在65〇nm&右者。 4·如申請專利範圍第丨項之光學記錄媒體,其中凹 )具有凹溝寬度小於l20nm,凹溝深度在4〇nm左右者: 5·如申請專利範圍第丨項之光學記錄媒體, DVD般媒體者。 〃 一 6·一種>在光學記錄媒體上記錄用之光學拾波器,旨在以 二波長和第二數值孔徑閱讀,其特徵為,具有光源以發生第一 波長之光束(6),而數值孔徑是以第二數值孔徑乘以 和第二波長之比而得者。 、 7·如申請專利範圍第6項之光學拾波器,其中第一波長和 第二波長相差50nm左右者。 8·如申請專利範圍第6或7項之光學拾波器,其中第一波 長在405nm左右,第二波長在65〇nm左右,而數值孔徑在 0.374左右者。 9·如申請專利範圍第6項之光學拾波器,其中在檢測器之 前,又有極化濾波器,以發生推挽訊號,阻礙光束(6)之TE 部份者。 10· —種記錄在光學記錄媒體上旨在以第二波長閱讀之記 錄裝置,其特徵為,具有如申請專利第6項之光學拾波器者。 11· 一種在光學記錄媒體上旨在以第二波長閱讀之記錄方 9 200818186 法,步驟為: 一發生在第一波長之光束(6),和 一以第一波長之光束(6),在光學記錄媒體上記錄者。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP06122015 | 2006-10-10 | ||
EP06301252A EP1933313A1 (en) | 2006-12-14 | 2006-12-14 | Compatible optical recording medium |
Publications (2)
Publication Number | Publication Date |
---|---|
TW200818186A true TW200818186A (en) | 2008-04-16 |
TWI427631B TWI427631B (zh) | 2014-02-21 |
Family
ID=38593660
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
TW096134336A TWI427631B (zh) | 2006-10-10 | 2007-09-14 | 記錄層具有凹溝結構之光學記錄媒體,在其上記錄用之光學拾波器及記錄裝置和方法 |
Country Status (11)
Country | Link |
---|---|
US (1) | US8213289B2 (zh) |
EP (1) | EP2074618B1 (zh) |
JP (1) | JP4995281B2 (zh) |
KR (1) | KR101364039B1 (zh) |
AT (1) | ATE476736T1 (zh) |
BR (1) | BRPI0717433A2 (zh) |
DE (1) | DE602007008274D1 (zh) |
MX (1) | MX2009003297A (zh) |
RU (1) | RU2437174C2 (zh) |
TW (1) | TWI427631B (zh) |
WO (1) | WO2008043661A1 (zh) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8021277B2 (en) | 2005-02-02 | 2011-09-20 | Mad Dogg Athletics, Inc. | Programmed exercise bicycle with computer aided guidance |
US7804752B2 (en) * | 2007-02-05 | 2010-09-28 | Hewlett-Packard Development Company, L.P. | Focal offset recording system and method |
US11806577B1 (en) | 2023-02-17 | 2023-11-07 | Mad Dogg Athletics, Inc. | Programmed exercise bicycle with computer aided guidance |
Family Cites Families (21)
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US4466087A (en) * | 1981-01-08 | 1984-08-14 | Xerox Corporation | Optical memory system for a reading/writing, verifying and tracking module |
NL8101932A (nl) * | 1981-04-21 | 1982-11-16 | Philips Nv | Inrichting voor het inschrijven en uitlezen van informatiesporen in een optische registratiedrager. |
US4771415A (en) * | 1985-02-27 | 1988-09-13 | Brother Kogyo Kabushiki Kaisha | Optical data storage and readout apparatus and head, using optical fibers between stationary and movable units |
FR2613866B1 (fr) * | 1987-04-07 | 1994-01-14 | Mitsubishi Denki Kk | Appareil d'enregistrement et de reproduction optique d'information |
DE3885992T2 (de) * | 1987-09-22 | 1994-06-09 | Hitachi Maxell | Optisches Informationsaufzeichnungs-/wiedergabegerät. |
NL8900362A (nl) * | 1989-02-15 | 1990-09-03 | Philips Nv | Werkwijze en inrichting voor het inschrijven en uitlezen van een magneto-optische registratiedrager. |
US5373492A (en) * | 1992-02-28 | 1994-12-13 | Canon Kabushiki Kaisha | Optical information recording/reproducing apparatus |
JPH08509566A (ja) * | 1993-12-23 | 1996-10-08 | トムソン−セーエスエフ | 記録媒体の上で情報を書き込み/読み出す光システムおよびその方法 |
JPH0887770A (ja) * | 1994-03-18 | 1996-04-02 | Sanyo Electric Co Ltd | 光学式情報再生装置及び方法 |
JPH09293286A (ja) * | 1996-02-22 | 1997-11-11 | Sanyo Electric Co Ltd | 光磁気記録媒体及び情報記録再生装置 |
JPH1021550A (ja) * | 1996-07-03 | 1998-01-23 | Seiko Epson Corp | 光記録再生方法、光学ヘッドおよび光記録装置 |
JP3485040B2 (ja) * | 1998-09-09 | 2004-01-13 | 三菱化学株式会社 | 光学的情報記録用媒体及び光記録方法 |
US6545971B1 (en) * | 1999-01-27 | 2003-04-08 | Kabushiki Kaisha Toshiba | Information recording/reproducing system for recording/reproducing information in three-dimensional recording medium of a light passing-through type |
US6373809B1 (en) * | 1999-09-28 | 2002-04-16 | Xerox Corporation | Multi-channel optical head for optical recording and reading optical storage data |
AU1592201A (en) * | 1999-11-10 | 2001-06-06 | Georgetown University | Near-field crystal optical memory |
JP2002150614A (ja) * | 2000-11-10 | 2002-05-24 | Pioneer Electronic Corp | 光ディスク |
TWI227478B (en) * | 2001-04-26 | 2005-02-01 | Fuji Photo Film Co Ltd | Optical information recording medium |
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KR100499586B1 (ko) * | 2003-05-20 | 2005-07-07 | 엘지전자 주식회사 | 고밀도 광디스크의 복사 방지 정보 관리방법 및 그에 따른고밀도 광디스크와 복사 방지 정보 검출장치 |
CA2535315A1 (en) | 2003-08-13 | 2005-02-24 | Koninklijke Philips Electronics N.V. | Recordable optical record carrier for multilevel and method for writing thereon |
JP4382646B2 (ja) * | 2004-05-17 | 2009-12-16 | 株式会社リコー | 光記録媒体とその製造方法 |
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2007
- 2007-09-14 TW TW096134336A patent/TWI427631B/zh not_active IP Right Cessation
- 2007-09-24 MX MX2009003297A patent/MX2009003297A/es active IP Right Grant
- 2007-09-24 BR BRPI0717433-0A patent/BRPI0717433A2/pt not_active IP Right Cessation
- 2007-09-24 EP EP07820512A patent/EP2074618B1/en not_active Not-in-force
- 2007-09-24 WO PCT/EP2007/060106 patent/WO2008043661A1/en active Application Filing
- 2007-09-24 AT AT07820512T patent/ATE476736T1/de not_active IP Right Cessation
- 2007-09-24 JP JP2009531805A patent/JP4995281B2/ja not_active Expired - Fee Related
- 2007-09-24 RU RU2009117617/28A patent/RU2437174C2/ru not_active IP Right Cessation
- 2007-09-24 KR KR1020097006139A patent/KR101364039B1/ko not_active IP Right Cessation
- 2007-09-24 DE DE602007008274T patent/DE602007008274D1/de active Active
- 2007-09-24 US US12/311,671 patent/US8213289B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
EP2074618B1 (en) | 2010-08-04 |
RU2009117617A (ru) | 2010-11-20 |
WO2008043661A1 (en) | 2008-04-17 |
TWI427631B (zh) | 2014-02-21 |
US8213289B2 (en) | 2012-07-03 |
DE602007008274D1 (de) | 2010-09-16 |
BRPI0717433A2 (pt) | 2013-12-10 |
ATE476736T1 (de) | 2010-08-15 |
US20100002559A1 (en) | 2010-01-07 |
JP2010506342A (ja) | 2010-02-25 |
EP2074618A1 (en) | 2009-07-01 |
MX2009003297A (es) | 2009-04-14 |
KR101364039B1 (ko) | 2014-02-17 |
KR20090061015A (ko) | 2009-06-15 |
RU2437174C2 (ru) | 2011-12-20 |
JP4995281B2 (ja) | 2012-08-08 |
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