TWI267075B - Test disk - Google Patents

Test disk

Info

Publication number
TWI267075B
TWI267075B TW093103303A TW93103303A TWI267075B TW I267075 B TWI267075 B TW I267075B TW 093103303 A TW093103303 A TW 093103303A TW 93103303 A TW93103303 A TW 93103303A TW I267075 B TWI267075 B TW I267075B
Authority
TW
Taiwan
Prior art keywords
disk
adjustment
recording
pickup
disks
Prior art date
Application number
TW093103303A
Other languages
Chinese (zh)
Other versions
TW200423113A (en
Inventor
Yoshiaki Maeno
Mitsuaki Ogawa
Original Assignee
Sanyo Electric Co
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 Sanyo Electric Co filed Critical Sanyo Electric Co
Publication of TW200423113A publication Critical patent/TW200423113A/en
Application granted granted Critical
Publication of TWI267075B publication Critical patent/TWI267075B/en

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
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/2403—Layers; Shape, structure or physical properties thereof
    • G11B7/24035—Recording layers
    • G11B7/24038—Multiple laminated recording layers
    • G11B7/24041—Multiple laminated recording layers with different recording characteristics
    • 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
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/24097—Structures for detection, control, recording operation or replay operation; Special shapes or structures for centering or eccentricity prevention; Arrangements for testing, inspecting or evaluating; Containers, cartridges or cassettes

Landscapes

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

Abstract

A test disk for the adjustment of a pickup capable of interchangeably reproducing different types of disks, which is formed by laminating a plurality of recording layers different in recording density in which each recording layer is provided with a signal recording surface recorded in a fixed form. With this test disk, the change of disks and the adjustment operation after a disk is changed can be omitted in the adjustment of the pickup since a plurality of recording layers different in recording density are laminated in a disk. Moreover, the adjustment of the pickup can be performed precisely since there is no difference in the disk itself and the state the disk being chucked that occur when a disk is changed.
TW093103303A 2003-03-31 2004-02-12 Test disk TWI267075B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2003096259A JP2004303351A (en) 2003-03-31 2003-03-31 Test disk

Publications (2)

Publication Number Publication Date
TW200423113A TW200423113A (en) 2004-11-01
TWI267075B true TWI267075B (en) 2006-11-21

Family

ID=33408381

Family Applications (1)

Application Number Title Priority Date Filing Date
TW093103303A TWI267075B (en) 2003-03-31 2004-02-12 Test disk

Country Status (4)

Country Link
JP (1) JP2004303351A (en)
KR (1) KR100597911B1 (en)
CN (1) CN1266683C (en)
TW (1) TWI267075B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008059618A (en) * 2005-01-07 2008-03-13 Matsushita Electric Ind Co Ltd Double layer optical disk

Also Published As

Publication number Publication date
JP2004303351A (en) 2004-10-28
KR100597911B1 (en) 2006-07-10
CN1266683C (en) 2006-07-26
KR20040086179A (en) 2004-10-08
TW200423113A (en) 2004-11-01
CN1538403A (en) 2004-10-20

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Legal Events

Date Code Title Description
MM4A Annulment or lapse of patent due to non-payment of fees