JPS6250896B2 - - Google Patents

Info

Publication number
JPS6250896B2
JPS6250896B2 JP57075967A JP7596782A JPS6250896B2 JP S6250896 B2 JPS6250896 B2 JP S6250896B2 JP 57075967 A JP57075967 A JP 57075967A JP 7596782 A JP7596782 A JP 7596782A JP S6250896 B2 JPS6250896 B2 JP S6250896B2
Authority
JP
Japan
Prior art keywords
beam splitter
information
light
laser
record carrier
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
Application number
JP57075967A
Other languages
English (en)
Japanese (ja)
Other versions
JPS58194149A (ja
Inventor
Shunichiro Wakamya
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.)
Pentax Corp
Original Assignee
Asahi Kogaku Kogyo 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 Asahi Kogaku Kogyo Co Ltd filed Critical Asahi Kogaku Kogyo Co Ltd
Priority to JP57075967A priority Critical patent/JPS58194149A/ja
Priority to US06/492,315 priority patent/US4553229A/en
Priority to DE19833316633 priority patent/DE3316633A1/de
Publication of JPS58194149A publication Critical patent/JPS58194149A/ja
Publication of JPS6250896B2 publication Critical patent/JPS6250896B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/20—Filters
    • G02B5/28—Interference filters
    • G02B5/285—Interference filters comprising deposited thin solid films
    • 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
    • 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
    • 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
    • G11B7/1362—Mirrors

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • General Physics & Mathematics (AREA)
  • Optical Head (AREA)
  • Optical Elements Other Than Lenses (AREA)
JP57075967A 1982-05-08 1982-05-08 光学的記録担体からの情報読取り装置 Granted JPS58194149A (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP57075967A JPS58194149A (ja) 1982-05-08 1982-05-08 光学的記録担体からの情報読取り装置
US06/492,315 US4553229A (en) 1982-05-08 1983-05-06 Apparatus for reading information
DE19833316633 DE3316633A1 (de) 1982-05-08 1983-05-06 Apparat zum lesen von informationen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57075967A JPS58194149A (ja) 1982-05-08 1982-05-08 光学的記録担体からの情報読取り装置

Publications (2)

Publication Number Publication Date
JPS58194149A JPS58194149A (ja) 1983-11-12
JPS6250896B2 true JPS6250896B2 (en]) 1987-10-27

Family

ID=13591500

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57075967A Granted JPS58194149A (ja) 1982-05-08 1982-05-08 光学的記録担体からの情報読取り装置

Country Status (3)

Country Link
US (1) US4553229A (en])
JP (1) JPS58194149A (en])
DE (1) DE3316633A1 (en])

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5157459A (en) * 1989-08-29 1992-10-20 Asahi Kogaku Kogyo Kabushiki Kaisha Wave front aberration measuring apparatus
JP2553532Y2 (ja) * 1991-07-23 1997-11-05 旭光学工業株式会社 走査光学系ユニットのハウジング構造
JPH0547060A (ja) * 1991-08-14 1993-02-26 Asahi Optical Co Ltd 光磁気デイスク装置の光学系
JPH07129992A (ja) * 1993-11-06 1995-05-19 Asahi Optical Co Ltd 情報記録再生装置
JP4817668B2 (ja) * 2004-02-18 2011-11-16 キヤノン株式会社 光走査装置

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2325951A1 (fr) * 1975-09-29 1977-04-22 Thomson Brandt Procede de diminution de bruit optique et dispositif mettant en oeuvre un tel procede
JPS5922289B2 (ja) * 1975-11-20 1984-05-25 ソニー株式会社 ジヨウホウケンシユツソウチ
CA1091966A (en) * 1976-10-15 1980-12-23 Chiaki Kojima Apparatus for reading signals recorded on a record carrier
AU520835B2 (en) * 1977-03-24 1982-03-04 World Development Laboratories Optical recording system and method
JPS5546706A (en) * 1978-09-29 1980-04-02 Canon Inc Phase difference reflecting mirror
US4312570A (en) * 1979-09-14 1982-01-26 Rockwell International Corporation High reflectivity coated mirror producing 90 degree phase shift

Also Published As

Publication number Publication date
US4553229A (en) 1985-11-12
DE3316633A1 (de) 1983-11-10
JPS58194149A (ja) 1983-11-12

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