KR960042544A - Optical discs and optical pickups with feet of different depths - Google Patents

Optical discs and optical pickups with feet of different depths Download PDF

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Publication number
KR960042544A
KR960042544A KR1019950011042A KR19950011042A KR960042544A KR 960042544 A KR960042544 A KR 960042544A KR 1019950011042 A KR1019950011042 A KR 1019950011042A KR 19950011042 A KR19950011042 A KR 19950011042A KR 960042544 A KR960042544 A KR 960042544A
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KR
South Korea
Prior art keywords
pits
optical
different depths
feet
different
Prior art date
Application number
KR1019950011042A
Other languages
Korean (ko)
Inventor
송태선
Original Assignee
구자홍
Lg 전자 주식회사
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 구자홍, Lg 전자 주식회사 filed Critical 구자홍
Priority to KR1019950011042A priority Critical patent/KR960042544A/en
Publication of KR960042544A publication Critical patent/KR960042544A/en

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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
    • G11B7/125—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
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/2407—Tracks or pits; Shape, structure or physical properties thereof
    • G11B7/24085—Pits

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Head (AREA)
  • Optical Recording Or Reproduction (AREA)

Abstract

본 발명은 광 기록재생 시스템에 있어서, 광 디스크의 피트를 각각 깊이가 다르게 구성하여 기록밀도를 높인 서로 다른 깊이의 피트를 갖는 광 디스크 및 광 픽업장치에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disc and an optical pickup apparatus having pits of different depths having high depths of recording by constructing pits of optical discs having different depths.

이를 위한 본 발명의 서로 다른 깊이의 피트를 갖는 광 디스크는 상기 복수의 피트는 제1깊이를 갖고 형성되는 제1피트, 제2깊이를 갖고 형성되는 제2피트가 트랙방향으로 신호체계에 따라 랜덤(Random)하게 섞여 배열되는 것을 특징으로 하고, 광 픽업장치는 상기 제1,2피트에 저장되어 있는 각각의 정보를 재생하기 위하여 서로 다른 파장(λ1,λ2)의 레이저빔을 조사하는 제1,2 레이저 다이오드를 포함하여 이루어져 효과적으로 광 디스크이 기록밀도를 높이는 효과가 있다.To this end, an optical disk having pits of different depths according to the present invention has a plurality of first pits having a first depth and a second pits formed with a second depth in a track direction. (Random) are mixed and arranged, the optical pickup device for irradiating a laser beam of different wavelengths (λ 1 , λ 2 ) to reproduce each information stored in the first and second feet The optical disk is effective to increase the recording density by including 1,2 laser diodes.

Description

서로 다른 깊이의 피트를 갖는 광 디스크 및 광 픽업장치Optical discs and optical pickups with feet of different depths

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제3도는 본 발명의 광 디스크의 피트구성도, 제4도는 피트깊이에 따른 RF 레벨의 피크변화값을 나타낸 그래프, 제5도는 동일 파장에서의 RF 레벨의 변화와 피트깊이의 관계를 나타낸 그래프.FIG. 3 is a pit configuration diagram of an optical disk of the present invention, FIG. 4 is a graph showing peak change values of RF levels according to pit depths, and FIG.

Claims (5)

각각의 특정정보를 저정하는 복수의 피트를 구비한 광 디스크에 있어서, 상기 복수의 피트는 기록밀도를 높이기 위하여 제1깊이를 갖고 형성되는 제1피트, 제2깊이를 갖고 형성되는 제2피트가 트랙방향으로 배열되는 것을 특징으로 하는 서로 다른 깊이의 피트를 갖는 광 디스크In an optical disk having a plurality of pits for storing respective specific information, the plurality of pits may include a first foot having a first depth and a second foot having a second depth in order to increase recording density. Optical discs with pits of different depths, arranged in track direction 제1항에 있어서, 제1,2 피트는 각각 서로 다른 파장(λ1,λ2)의 레이저빔에 의해 재생 출력되는 것을 특징으로 하는 서로 다른 깊이의 피트는 갖는 광 디스크.The optical disc having pits of different depths according to claim 1, wherein the first and second pits are reproduced and output by laser beams having different wavelengths (λ 1 and λ 2 ), respectively. 제1항에 있어서, 제1,2 피트는 각각 상이한 깊이 및 길이에 의해 각각의 정보가 저장되는 것을 특징으로 하는 서로 다른 깊이의 피트는 갖는 광 디스크.The optical disc of claim 1, wherein each of the first and second feet is stored with different information at different depths and lengths. 제1항에 있어서, 상기 제1,2 피트의 깊이는 사용되는 레이저광 파장의 λ/4~λ/8 사이인 것을 특징으로 하는 서로 다른 깊이의 피트는 갖는 광 디스크.The optical disc of claim 1, wherein the depths of the first and second feet are between λ / 4 and λ / 8 of the wavelength of the laser light used. 트랙방향으로 신호체계에 따라 랜덤(Random)하게 섞여 배열되는 복수개의 서로 다른 깊이의 제1,2 피트에 의해 각각의 특정정보를 저장하는 있는 광 디스크의 정보를 재생해 내는 광 픽업장치에 있어서, 상기 제1,2피트에 저장되어 있는 각각의 정보를 재생하기 위하여 서로 다른 파장(λ1,λ2)의 레이저빔을 조사하는 제1,2레이저 다이오드와, 상기 각각의 피트에 의해 반사되는 서로 다른 파장(λ1,λ2)의 레이저 빔을 각각 검출하여 광디스크의 저장 데이타를 읽어내는 제1,2포토 다이오드를 포함하여 구성됨을 특징으로 하는 서로 다른 깊이의 피트를 갖는 광 디스크의 광 픽업장치.An optical pickup apparatus for reproducing information of an optical disc storing respective specific information by first and second feet of a plurality of different depths arranged randomly in accordance with a signal system in a track direction. First and second laser diodes irradiating laser beams having different wavelengths λ 1 and λ 2 so as to reproduce respective information stored in the first and second feet, and reflected by each of the pits. Optical pickup apparatus of optical discs having pits of different depths, comprising first and second photodiodes for detecting laser beams of different wavelengths λ 1 and λ 2 , respectively, and reading the stored data of the optical disc. . ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950011042A 1995-05-04 1995-05-04 Optical discs and optical pickups with feet of different depths KR960042544A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019950011042A KR960042544A (en) 1995-05-04 1995-05-04 Optical discs and optical pickups with feet of different depths

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019950011042A KR960042544A (en) 1995-05-04 1995-05-04 Optical discs and optical pickups with feet of different depths

Publications (1)

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KR960042544A true KR960042544A (en) 1996-12-21

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005029484A1 (en) * 2003-09-22 2005-03-31 Samsung Electronics Co., Ltd. High density readable only optical disc and method of preparing the same
KR100488446B1 (en) * 1997-02-15 2005-08-04 엘지전자 주식회사 Recording device of optical disc
KR100694253B1 (en) * 2000-07-11 2007-03-14 엘지전자 주식회사 A recording/reproducing optical pickup apparatus for multi-layer

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100488446B1 (en) * 1997-02-15 2005-08-04 엘지전자 주식회사 Recording device of optical disc
KR100694253B1 (en) * 2000-07-11 2007-03-14 엘지전자 주식회사 A recording/reproducing optical pickup apparatus for multi-layer
WO2005029484A1 (en) * 2003-09-22 2005-03-31 Samsung Electronics Co., Ltd. High density readable only optical disc and method of preparing the same
US7087284B2 (en) 2003-09-22 2006-08-08 Samsung Electronics Co., Ltd. High density readable only optical disc and method of preparing the same

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