JPH0533466B2 - - Google Patents

Info

Publication number
JPH0533466B2
JPH0533466B2 JP58062989A JP6298983A JPH0533466B2 JP H0533466 B2 JPH0533466 B2 JP H0533466B2 JP 58062989 A JP58062989 A JP 58062989A JP 6298983 A JP6298983 A JP 6298983A JP H0533466 B2 JPH0533466 B2 JP H0533466B2
Authority
JP
Japan
Prior art keywords
light
incident
output
light beam
optical axis
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 - Lifetime
Application number
JP58062989A
Other languages
English (en)
Japanese (ja)
Other versions
JPS59188852A (ja
Inventor
Masayuki Inoe
Satoshi Shinada
Yoshihiro Katase
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP58062989A priority Critical patent/JPS59188852A/ja
Publication of JPS59188852A publication Critical patent/JPS59188852A/ja
Publication of JPH0533466B2 publication Critical patent/JPH0533466B2/ja
Granted legal-status Critical Current

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
    • G11B7/1398—Means for shaping the cross-section of the beam, e.g. into circular or elliptical cross-section
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Head (AREA)
JP58062989A 1983-04-12 1983-04-12 偏光ビ−ムスプリツタ Granted JPS59188852A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP58062989A JPS59188852A (ja) 1983-04-12 1983-04-12 偏光ビ−ムスプリツタ

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP58062989A JPS59188852A (ja) 1983-04-12 1983-04-12 偏光ビ−ムスプリツタ

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP61206882A Division JPS6278743A (ja) 1986-09-04 1986-09-04 光学ヘツド

Publications (2)

Publication Number Publication Date
JPS59188852A JPS59188852A (ja) 1984-10-26
JPH0533466B2 true JPH0533466B2 (enrdf_load_stackoverflow) 1993-05-19

Family

ID=13216280

Family Applications (1)

Application Number Title Priority Date Filing Date
JP58062989A Granted JPS59188852A (ja) 1983-04-12 1983-04-12 偏光ビ−ムスプリツタ

Country Status (1)

Country Link
JP (1) JPS59188852A (enrdf_load_stackoverflow)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59195345A (ja) * 1983-04-20 1984-11-06 Matsushita Electric Ind Co Ltd 光学ヘツド
JP3607836B2 (ja) * 1999-03-31 2005-01-05 シャープ株式会社 光ピックアップ装置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3829622A (en) * 1972-10-24 1974-08-13 Mca Disco Vision Video disc player with variably biased pneumatic head
JPS59128510A (ja) * 1983-01-12 1984-07-24 Toyo Commun Equip Co Ltd 偏光ビ−ム・スプリツタのビ−ム・パタ−ン整形装置
JPS59129950A (ja) * 1983-01-12 1984-07-26 Matsushita Electric Ind Co Ltd 光学式ピツクアツプ

Also Published As

Publication number Publication date
JPS59188852A (ja) 1984-10-26

Similar Documents

Publication Publication Date Title
US4689780A (en) Optical recording and reproducing head
JPH0795372B2 (ja) 光ヘツド装置
KR100370790B1 (ko) 광헤드장치
US5745304A (en) Integrated optical pickup system capable of reading optical disks of different thickness
JPS62117150A (ja) 光学式ピツクアツプ
US6510119B2 (en) Optical head device
JPH0533466B2 (enrdf_load_stackoverflow)
JP2849176B2 (ja) 光情報記録・再生用ヘッド
JPH0534735B2 (enrdf_load_stackoverflow)
JPH02311816A (ja) ビーム変換装置
JP2864018B2 (ja) 光学ヘッド
JPS6118492Y2 (enrdf_load_stackoverflow)
JP2000275567A (ja) ビーム整形光学系および記録再生装置
JP2501097B2 (ja) 光ヘッド装置
JP2001076368A (ja) 光学ヘッドおよび１／４波長板
JP2825873B2 (ja) 光導波路
US20020021494A1 (en) Optical device
JPH0728099B2 (ja) 半導体レ−ザ光コリメ−ト装置
JPH04209335A (ja) 発光部材
JPH05128575A (ja) 複数ビーム式光記録のためのシステム及び方法
JP2537338B2 (ja) 光ヘッド装置
JPS61223704A (ja) ホログラムレンズの作成方法
JPS61178740A (ja) 光ヘツド装置
JP2502484B2 (ja) 光ヘッド装置
JPH02276046A (ja) 光ヘッド装置