KR100209631B1 - Optical pickup for different type disc - Google Patents

Optical pickup for different type disc

Info

Publication number
KR100209631B1
KR100209631B1 KR1019970006909A KR19970006909A KR100209631B1 KR 100209631 B1 KR100209631 B1 KR 100209631B1 KR 1019970006909 A KR1019970006909 A KR 1019970006909A KR 19970006909 A KR19970006909 A KR 19970006909A KR 100209631 B1 KR100209631 B1 KR 100209631B1
Authority
KR
South Korea
Prior art keywords
optical pickup
different type
type disc
disc
pickup
Prior art date
Application number
KR1019970006909A
Other languages
Korean (ko)
Other versions
KR19980072248A (en
Inventor
Man-Hyung Lee
Original Assignee
Lg Electronics Inc
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 Lg Electronics Inc filed Critical Lg Electronics Inc
Priority to KR1019970006909A priority Critical patent/KR100209631B1/en
Publication of KR19980072248A publication Critical patent/KR19980072248A/en
Application granted granted Critical
Publication of KR100209631B1 publication Critical patent/KR100209631B1/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
    • G11B7/12—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
    • G11B7/139—Numerical aperture control means
    • 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
    • G11B7/125—Optical beam sources therefor, e.g. laser control circuitry specially adapted for optical storage devices; Modulators, e.g. means for controlling the size or intensity of optical spots or optical traces
    • G11B7/127—Lasers; Multiple laser arrays
    • G11B7/1275—Two or more lasers having different wavelengths
    • 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
    • G11B7/13—Optical detectors 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
    • G11B7/12—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
    • G11B7/1353—Diffractive elements, e.g. holograms or gratings
    • 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
    • G11B7/1372—Lenses
    • G11B7/1374—Objective lenses
    • 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
    • G11B7/1395—Beam splitters or combiners

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Head (AREA)
KR1019970006909A 1997-03-03 1997-03-03 Optical pickup for different type disc KR100209631B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019970006909A KR100209631B1 (en) 1997-03-03 1997-03-03 Optical pickup for different type disc

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019970006909A KR100209631B1 (en) 1997-03-03 1997-03-03 Optical pickup for different type disc

Publications (2)

Publication Number Publication Date
KR19980072248A KR19980072248A (en) 1998-11-05
KR100209631B1 true KR100209631B1 (en) 1999-07-15

Family

ID=19498555

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019970006909A KR100209631B1 (en) 1997-03-03 1997-03-03 Optical pickup for different type disc

Country Status (1)

Country Link
KR (1) KR100209631B1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR19990011300A (en) * 1997-07-22 1999-02-18 구자홍 Recording / Playback Method for Heterogeneous Optical Discs and Its Apparatus

Also Published As

Publication number Publication date
KR19980072248A (en) 1998-11-05

Similar Documents

Publication Publication Date Title
HK1017941A1 (en) Optical disc
GB2321127B (en) Optical disc device
GB9713094D0 (en) Optical disc drive
HK1039204A1 (en) Optical disc
HK1019532A1 (en) Optical disc
SG72954A1 (en) Optical pickup
HK1032473A1 (en) Optical pickup.
HK1021669A1 (en) Optical disc
EP0914651A4 (en) Playable optical picture disc
HK1042106B (en) Adhesive for optical disks
GB2328776B (en) Optical pickup for recording/reproduction
SG93194A1 (en) Optical disc
GB9809623D0 (en) Optical disk
GB2314197B (en) Optical pickup
GB2289974B (en) Optical pickup
AU9461598A (en) Optical disc
SG52983A1 (en) Optical pickup
GB2327291B (en) Optical system for optical disk drive
GB2290653B (en) Optical pickup
GB2330939B (en) Optical system for optical disc drive
GB2326248B (en) Optical discs
AU5341998A (en) Optical pickup
GB9927092D0 (en) Optical disc
GB9800136D0 (en) Optical pickup
GB2315909B (en) Optical pickup

Legal Events

Date Code Title Description
A201 Request for examination
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 20080319

Year of fee payment: 10

LAPS Lapse due to unpaid annual fee