JPS5954046A - 焦点検出装置 - Google Patents

焦点検出装置

Info

Publication number
JPS5954046A
JPS5954046A JP57165258A JP16525882A JPS5954046A JP S5954046 A JPS5954046 A JP S5954046A JP 57165258 A JP57165258 A JP 57165258A JP 16525882 A JP16525882 A JP 16525882A JP S5954046 A JPS5954046 A JP S5954046A
Authority
JP
Japan
Prior art keywords
light
reflected
light beam
optical
optical fiber
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.)
Granted
Application number
JP57165258A
Other languages
English (en)
Japanese (ja)
Other versions
JPH0439131B2 (enrdf_load_stackoverflow
Inventor
Tetsuo Kuwayama
桑山　哲郎
Kazuya Matsumoto
和也 松本
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP57165258A priority Critical patent/JPS5954046A/ja
Priority to US06/533,440 priority patent/US4626679A/en
Priority to DE3334120A priority patent/DE3334120C2/de
Publication of JPS5954046A publication Critical patent/JPS5954046A/ja
Publication of JPH0439131B2 publication Critical patent/JPH0439131B2/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
    • G11B7/1372—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
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B7/0908—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for focusing only
    • G11B7/0912—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for focusing only by push-pull method

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Automatic Focus Adjustment (AREA)
JP57165258A 1982-09-22 1982-09-22 焦点検出装置 Granted JPS5954046A (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP57165258A JPS5954046A (ja) 1982-09-22 1982-09-22 焦点検出装置
US06/533,440 US4626679A (en) 1982-09-22 1983-09-19 Optical head and method of detecting the focus thereof
DE3334120A DE3334120C2 (de) 1982-09-22 1983-09-21 Optischer Kopf, insbesondere zur Fokusermittlung in einer optischen Aufzeichnungs-/Wiedergabevorrichtung

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57165258A JPS5954046A (ja) 1982-09-22 1982-09-22 焦点検出装置

Publications (2)

Publication Number Publication Date
JPS5954046A true JPS5954046A (ja) 1984-03-28
JPH0439131B2 JPH0439131B2 (enrdf_load_stackoverflow) 1992-06-26

Family

ID=15808898

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57165258A Granted JPS5954046A (ja) 1982-09-22 1982-09-22 焦点検出装置

Country Status (1)

Country Link
JP (1) JPS5954046A (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100607947B1 (ko) * 1999-11-25 2006-08-03 삼성전자주식회사 기록재생용 광헤드

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5099561A (enrdf_load_stackoverflow) * 1973-12-28 1975-08-07
JPS56165936A (en) * 1980-05-22 1981-12-19 Sharp Corp Optical information reproducer

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5099561A (enrdf_load_stackoverflow) * 1973-12-28 1975-08-07
JPS56165936A (en) * 1980-05-22 1981-12-19 Sharp Corp Optical information reproducer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100607947B1 (ko) * 1999-11-25 2006-08-03 삼성전자주식회사 기록재생용 광헤드

Also Published As

Publication number Publication date
JPH0439131B2 (enrdf_load_stackoverflow) 1992-06-26

Similar Documents

Publication Publication Date Title
JPS5753831A (en) Method and device for reproduction of optical information
JPS6227456B2 (enrdf_load_stackoverflow)
US4689479A (en) Optical focussing and tracking system using a polarization prism for dividing the reflected beam
JPS598145A (ja) 光学式ピツクアツプ
US4954702A (en) Process for detecting a focal point in an optical head
JPS5954046A (ja) 焦点検出装置
JPS62137736A (ja) 光ヘツド装置
JPS58128034A (ja) 光ピツクアツプ
JPS586534A (ja) 再生装置の光学装置
US5939710A (en) Optical pickup system incorporating therein a beam splitter having a phase layer
JP2578203B2 (ja) 光ヘッド
KR850000421B1 (ko) 초점 검출방법
JPH0219537B2 (enrdf_load_stackoverflow)
JPS637950Y2 (enrdf_load_stackoverflow)
JPS6029947A (ja) 情報記録再生装置
KR0134842B1 (ko) 재생전용 광픽업 광학계
JP2748052B2 (ja) 光分離素子とこれを使用した受光光学装置
JPS63140426A (ja) 光ピツクアツプ装置
JPH0215434A (ja) 光ピックアップ
JPS61216144A (ja) 光情報処理装置
JPH01248342A (ja) 光ピツクアツプ
JPH02292736A (ja) 光ヘッド
JPS60626A (ja) 光ピツクアツプ
JPS58147821A (ja) 光学式ヘツド
JPS647407B2 (enrdf_load_stackoverflow)