JPS56107335A - Tracking system for optical recorder - Google Patents

Tracking system for optical recorder

Info

Publication number
JPS56107335A
JPS56107335A JP904980A JP904980A JPS56107335A JP S56107335 A JPS56107335 A JP S56107335A JP 904980 A JP904980 A JP 904980A JP 904980 A JP904980 A JP 904980A JP S56107335 A JPS56107335 A JP S56107335A
Authority
JP
Japan
Prior art keywords
mirror
tracks
lens system
optical disc
light
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
JP904980A
Other languages
Japanese (ja)
Inventor
Hironori Goto
Shigeru Arai
Nagaaki Etsuno
Koichi Ogawa
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP904980A priority Critical patent/JPS56107335A/en
Publication of JPS56107335A publication Critical patent/JPS56107335A/en
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
    • G11B7/08—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
    • G11B7/0901—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 track following only

Landscapes

  • Optical Record Carriers And Manufacture Thereof (AREA)
  • Optical Recording Or Reproduction (AREA)

Abstract

PURPOSE:To enable sure tracking, by providing the boundary region in which the sectional area is convex or concave between the recording information regions (tracks) of optical disc recording carrier, projecting electromagnetic waves on the tracks, detecting the reflected waves and controlling the position of the recording information detecting mechanism. CONSTITUTION:The boundary region 2 of convex shape (can also be concave shape) is provided between the tracks 4 of the recording carrier board 1 and an optical disc 15 is made by forming the recording film 3 with the vapor deposition of optical reflection metal such as Te. The laser light from the light source 11 is projected on the optical disc 15 via the condenser lens system 12, galvano-mirror (half mirror) 13 and condenser lens system 14, the reflected light is fed to a differential detector 16 from the lens system 14 and mirror 13, and the difference of intensity between the normal intensity (reflected light 6 from the track 4) 9 appeared at the window 8 of the detector 16 and biased intensity (no reflection light 7 from the region 2) 10 is amplified at a differential amplifier 17, so that the mirror 13 can be adjusted with the difference between both the intensities and the laser light 5 makes normal position.
JP904980A 1980-01-29 1980-01-29 Tracking system for optical recorder Pending JPS56107335A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP904980A JPS56107335A (en) 1980-01-29 1980-01-29 Tracking system for optical recorder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP904980A JPS56107335A (en) 1980-01-29 1980-01-29 Tracking system for optical recorder

Publications (1)

Publication Number Publication Date
JPS56107335A true JPS56107335A (en) 1981-08-26

Family

ID=11709775

Family Applications (1)

Application Number Title Priority Date Filing Date
JP904980A Pending JPS56107335A (en) 1980-01-29 1980-01-29 Tracking system for optical recorder

Country Status (1)

Country Link
JP (1) JPS56107335A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6278726A (en) * 1985-10-02 1987-04-11 Matsushita Electric Ind Co Ltd Recording and reproducing method for flat information recording carrier
JPS63119033A (en) * 1986-11-07 1988-05-23 Canon Inc Information recording medium

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6278726A (en) * 1985-10-02 1987-04-11 Matsushita Electric Ind Co Ltd Recording and reproducing method for flat information recording carrier
JPS63119033A (en) * 1986-11-07 1988-05-23 Canon Inc Information recording medium

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