JPS5589924A - Optical information reproduction unit - Google Patents

Optical information reproduction unit

Info

Publication number
JPS5589924A
JPS5589924A JP15992578A JP15992578A JPS5589924A JP S5589924 A JPS5589924 A JP S5589924A JP 15992578 A JP15992578 A JP 15992578A JP 15992578 A JP15992578 A JP 15992578A JP S5589924 A JPS5589924 A JP S5589924A
Authority
JP
Japan
Prior art keywords
light beam
circular
light
spot
modulation
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.)
Pending
Application number
JP15992578A
Other languages
English (en)
Inventor
Takashi Yamaguchi
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP15992578A priority Critical patent/JPS5589924A/ja
Publication of JPS5589924A publication Critical patent/JPS5589924A/ja
Pending 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
    • G11B7/1381—Non-lens elements for altering the properties of the beam, e.g. knife edges, slits, filters or stops
    • 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
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Head (AREA)
  • Length Measuring Devices By Optical Means (AREA)
JP15992578A 1978-12-27 1978-12-27 Optical information reproduction unit Pending JPS5589924A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15992578A JPS5589924A (en) 1978-12-27 1978-12-27 Optical information reproduction unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15992578A JPS5589924A (en) 1978-12-27 1978-12-27 Optical information reproduction unit

Publications (1)

Publication Number Publication Date
JPS5589924A true JPS5589924A (en) 1980-07-08

Family

ID=15704141

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15992578A Pending JPS5589924A (en) 1978-12-27 1978-12-27 Optical information reproduction unit

Country Status (1)

Country Link
JP (1) JPS5589924A (ja)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5750335A (en) * 1980-09-09 1982-03-24 Mitsubishi Electric Corp Optical information reproducer
JPS5885944A (ja) * 1981-11-02 1983-05-23 エヌ・ベ−・フイリツプス・フル−イランペンフアブリケン 記録キヤリヤ読取装置
JPS61182927U (ja) * 1985-04-30 1986-11-14
FR2743660A1 (fr) * 1996-01-11 1997-07-18 Samsung Electronics Co Ltd Tete a lecture optique
KR20040006727A (ko) * 2002-07-15 2004-01-24 엘지이노텍 주식회사 레이저 다이오드 무선 광통신 시스템의 송신장치
CN102353326A (zh) * 2011-06-02 2012-02-15 华中科技大学 一种基于圆形扫描激光的轨线自动跟踪方法
CN105300279A (zh) * 2015-10-08 2016-02-03 扬中中科维康智能科技有限公司 一种激光跟踪仪光斑位置敏感器psd跟踪零点的标定方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5391759A (en) * 1976-12-27 1978-08-11 Mansei Kogyo Kk Optics to obtain equal direction spot from various direction light beam

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5391759A (en) * 1976-12-27 1978-08-11 Mansei Kogyo Kk Optics to obtain equal direction spot from various direction light beam

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5750335A (en) * 1980-09-09 1982-03-24 Mitsubishi Electric Corp Optical information reproducer
JPS6256581B2 (ja) * 1980-09-09 1987-11-26 Mitsubishi Electric Corp
JPS5885944A (ja) * 1981-11-02 1983-05-23 エヌ・ベ−・フイリツプス・フル−イランペンフアブリケン 記録キヤリヤ読取装置
JPS61182927U (ja) * 1985-04-30 1986-11-14
FR2743660A1 (fr) * 1996-01-11 1997-07-18 Samsung Electronics Co Ltd Tete a lecture optique
NL1004964C2 (nl) * 1996-01-11 1998-02-05 Samsung Electronics Co Ltd Optische pick-upinrichting.
US5986993A (en) * 1996-01-11 1999-11-16 Samsung Electronics Co., Ltd. Optical pickup device having a diaphram with a predetermined aperture
KR20040006727A (ko) * 2002-07-15 2004-01-24 엘지이노텍 주식회사 레이저 다이오드 무선 광통신 시스템의 송신장치
CN102353326A (zh) * 2011-06-02 2012-02-15 华中科技大学 一种基于圆形扫描激光的轨线自动跟踪方法
CN105300279A (zh) * 2015-10-08 2016-02-03 扬中中科维康智能科技有限公司 一种激光跟踪仪光斑位置敏感器psd跟踪零点的标定方法

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