JPS624777B2 - - Google Patents

Info

Publication number
JPS624777B2
JPS624777B2 JP1586880A JP1586880A JPS624777B2 JP S624777 B2 JPS624777 B2 JP S624777B2 JP 1586880 A JP1586880 A JP 1586880A JP 1586880 A JP1586880 A JP 1586880A JP S624777 B2 JPS624777 B2 JP S624777B2
Authority
JP
Japan
Prior art keywords
light receiving
light
receiving elements
output
sum
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
JP1586880A
Other languages
English (en)
Japanese (ja)
Other versions
JPS56114134A (en
Inventor
Takashi Nishio
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.)
Pioneer Corp
Original Assignee
Pioneer Electronic Corp
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 Pioneer Electronic Corp filed Critical Pioneer Electronic Corp
Priority to JP1586880A priority Critical patent/JPS56114134A/ja
Publication of JPS56114134A publication Critical patent/JPS56114134A/ja
Publication of JPS624777B2 publication Critical patent/JPS624777B2/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
    • G11B33/00—Constructional parts, details or accessories not provided for in the other groups of this subclass
    • G11B33/10—Indicating arrangements; Warning arrangements
    • 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

Landscapes

  • Automatic Focus Adjustment (AREA)
  • Optical Recording Or Reproduction (AREA)
JP1586880A 1980-02-12 1980-02-12 Monitor device for operation state of optical information reader Granted JPS56114134A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1586880A JPS56114134A (en) 1980-02-12 1980-02-12 Monitor device for operation state of optical information reader

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1586880A JPS56114134A (en) 1980-02-12 1980-02-12 Monitor device for operation state of optical information reader

Publications (2)

Publication Number Publication Date
JPS56114134A JPS56114134A (en) 1981-09-08
JPS624777B2 true JPS624777B2 (de) 1987-01-31

Family

ID=11900773

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1586880A Granted JPS56114134A (en) 1980-02-12 1980-02-12 Monitor device for operation state of optical information reader

Country Status (1)

Country Link
JP (1) JPS56114134A (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4499569A (en) * 1982-09-07 1985-02-12 Discovision Associates Writing beam focus monitor
JPS61144732A (ja) * 1984-12-18 1986-07-02 Olympus Optical Co Ltd ジツタ測定装置
JP2615743B2 (ja) * 1988-01-26 1997-06-04 松下電工株式会社 乱数発生装置

Also Published As

Publication number Publication date
JPS56114134A (en) 1981-09-08

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