KR950004139A - Optical pickup device for magneto-optical disk - Google Patents

Optical pickup device for magneto-optical disk Download PDF

Info

Publication number
KR950004139A
KR950004139A KR1019930013472A KR930013472A KR950004139A KR 950004139 A KR950004139 A KR 950004139A KR 1019930013472 A KR1019930013472 A KR 1019930013472A KR 930013472 A KR930013472 A KR 930013472A KR 950004139 A KR950004139 A KR 950004139A
Authority
KR
South Korea
Prior art keywords
optical
splitting means
beam splitting
waves
wave
Prior art date
Application number
KR1019930013472A
Other languages
Korean (ko)
Other versions
KR960000270B1 (en
Inventor
김은진
Original Assignee
이헌조
주식회사 금성사
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 이헌조, 주식회사 금성사 filed Critical 이헌조
Priority to KR1019930013472A priority Critical patent/KR960000270B1/en
Publication of KR950004139A publication Critical patent/KR950004139A/en
Application granted granted Critical
Publication of KR960000270B1 publication Critical patent/KR960000270B1/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
    • G11B7/1356—Double or multiple prisms, i.e. having two or more prisms in cooperation
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
    • G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
    • G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)

Abstract

본 발명은 광자기 디스크의 광픽업 장치에 관한 것으로서, 변형된 편광빔 분할수단과 한개의 광검출수단을 사용하여 포커스 에러와 트랙킹 에러 및 디스크상에 기록된 광자기신호의 정확한 검출은 물론 광학부품의 감소 및 부피의 축소에 따른 픽업자체의 경량화와 독취속도를 향상시키도록 한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical pickup device for a magneto-optical disk, wherein the modified polarization beam splitting means and one optical detection means use the optical component as well as the accurate detection of the focus error and tracking error and the magneto-optical signal recorded on the disc. It is to reduce the weight of the pickup itself and to reduce the reading speed by reducing the volume and to reduce the volume.

이와 같은 본 발명의 목적은 레이저부재로부터 발산된 레이저빔이 시준렌즈, 제 1 편광빔 분할수단 및 대물렌즈를 통해 광디스크상에 집광되고 그로부터 역순으로 처리되어 상기 제 1 편광빔 분할수단을 통해 반사되는 S파의 전부와 P파의 일부를 입사받아 편광방향을 45°로 회전시키는 반파장대와, 상기 반파장대를 통해 입사되는 빔을 S파와 P파로 분리하여 두 파를 동일한 방향으로 출사시키는 제 2 편광빔 분할수단과, 상기 제 2 편광빔 분할수단에서 반사된 S파와 P파와의 합,차신호로 트랙킹 에러, 포커스 에러 및 광정보신호를 검출하는 8분할된 광검출기로 이루어짐으로써 달성된다.The object of the present invention is that the laser beam emitted from the laser member is focused on the optical disk through the collimating lens, the first polarizing beam splitting means and the objective lens, and processed in reverse order therefrom to be reflected by the first polarizing beam splitting means. A half-wavelength that receives all of the S-waves and a portion of the P-wave and rotates the polarization direction by 45 °, and a second polarization that separates the beams incident through the half-wavelength into S- and P-waves and emits the two waves in the same direction And an eight-segmented photodetector for detecting the tracking error, the focus error and the optical information signal by the sum of the beam splitting means and the S-wave and the P-wave reflected by the second polarization beam splitting means, the difference signal.

Description

광자기 디스크의 광픽업 장치Optical pickup device for magneto-optical disk

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

제 2 도는 본 발명 광자기 디스크의 광픽업 장치의 구성도, 제 3 도는 제 2 도 광검출기를 상세하게 도시한 블럭도, 제 4 도는 광디스크와 대물렌즈 간격 변화에 따른 광검출기상에 집속되는 빔의 변화를 보인도로서, (a)는 포커스 에러 발생이 없을시의 빔의 집속 상태도이고, (b)는 대물렌즈와 광디스크간의 간격이 가까워짐(포커스 에러 발생)에 따른 빔의 집속 상태도이며, (c)는 대물렌즈와 광디스크간의 간격이 멀어짐(포커스 에러 발생)에 따른 빔의 집속 상태도.2 is a block diagram showing an optical pickup device of the magneto-optical disk of the present invention, FIG. 3 is a block diagram showing the photodetector in detail, and FIG. 4 is a beam focused on the photodetector according to the change of the optical disk and the objective lens. (A) is the beam focusing state diagram when no focus error occurs, (b) is the beam focusing state diagram as the distance between the objective lens and the optical disk gets closer (focus error occurs). c) is a focus state of the beam according to the distance between the objective lens and the optical disk (focus error occurs).

Claims (5)

레이저부재로부터 발산된 레이저빔이 시준렌즈, 제 1 편광빔 분할수단 및 대물렌즈를 통해 광디스크상에 집광되고 그로부터 역순으로 처리되어 상기 제 1 편광빔 분할수단을통해 반사되는 S파의 전부와 P파의 일부를 입사받아 편광방향을 45°로 회전시키는 반파장대와, 상기 반파장대를 통해 입사되는 빔을 S파와 P파로 분리하여 두 파를 동일한 방향으로 출사시키는 제 2 편광빔 분할수단과, 상기 제 2 편광빔 분할수단에서 반사된 S파와 P파와의 합,차신호로 트랙킹 에러, 포커스 에러 및 광정보신호를 검출하는 8분할된 광거출기를 포함하여 된 광자기 디스크의 광픽업 장치.The laser beam emitted from the laser member is focused on the optical disk through the collimating lens, the first polarizing beam splitting means and the objective lens, and is processed in reverse order from all the S-waves and the P wave reflected through the first polarizing beam splitting means. A half wave band for rotating a polarization direction by 45 [deg.] Upon receiving a portion of the light; a second polarization beam splitting means for splitting the beam incident through the half wave band into S waves and P waves and emitting two waves in the same direction; 2. An optical pickup apparatus for a magneto-optical disk comprising an eight-segmented optical extractor for detecting tracking error, focus error, and optical information signal as a sum of S-wave and P-wave reflected from the polarization beam splitting means and a difference signal. 제 1 항에 있어서, 제 2 편광빔 분할수단은 직각이등변 삼각형 프리즘과 한 각이 45°인 평행사변형 프리즘으로 결합되어 그 경계면은 입사된 S파를 전반사시키고 P파를 전부 투과시키고, 평행사변형 프리즘의 빗면은 투과된 P파를 전반시키도록 구성함을 특징으로 한 광자기 디스크의 광픽업 장치.The method of claim 1, wherein the second polarization beam splitting means is combined with a right-sided isosceles triangle prism and a parallelogram prism at an angle of 45 [deg.] So that its interface totally reflects the incident S-waves and transmits all P-waves, The optical pick-up apparatus of a magneto-optical disk, characterized in that the oblique side is configured to propagate the transmitted P wave. 제 2 항에 있어서, 제 2 편광빔 분할수단의 경계면은 편광을 분할할 수 있게 편광코팅된 것을 특징으로 한 광자기 디스크의 광픽업 장치.3. The optical pickup apparatus of a magneto-optical disk according to claim 2, wherein the boundary surface of the second polarization beam splitting means is polarized coating so as to divide polarized light. 제 1 항에 있어서, 광검출기는 제 2 편광빔 분할수단이 경계면으로부터 전반사된 S파의 빔을 검출하는 제 1 검출영역과, 제 2 편광빔 분할수단의 빗면으로부터 전반사된 P파의 빔을 검출하는 제 2 검출영역으로 분할 구성한 것을 특징으로 한 광자기 디스크의 광픽업 장치.The photodetector according to claim 1, wherein the photodetector detects the first detection region in which the second polarization beam splitting means detects the S-wave beam totally reflected from the boundary surface, and the beam of P wave totally reflected from the oblique surface of the second polarization beam splitting means. An optical pickup apparatus for a magneto-optical disc, characterized by being divided into second detection regions. 제 1 항 또는 제 4 항에 있어서, 광검출기의 제1,제 2 검출영역은 각각의 영역이 4분할된 것을 특징으로 한 광자기 디스크의 광픽업 장치.The optical pickup apparatus of a magneto-optical disk according to claim 1 or 4, wherein each of the first and second detection areas of the photodetector is divided into four areas. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019930013472A 1993-07-16 1993-07-16 Optical pick-up apparatus KR960000270B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019930013472A KR960000270B1 (en) 1993-07-16 1993-07-16 Optical pick-up apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019930013472A KR960000270B1 (en) 1993-07-16 1993-07-16 Optical pick-up apparatus

Publications (2)

Publication Number Publication Date
KR950004139A true KR950004139A (en) 1995-02-17
KR960000270B1 KR960000270B1 (en) 1996-01-04

Family

ID=19359439

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019930013472A KR960000270B1 (en) 1993-07-16 1993-07-16 Optical pick-up apparatus

Country Status (1)

Country Link
KR (1) KR960000270B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100377886B1 (en) * 1998-12-16 2003-07-16 삼성엔지니어링 주식회사 Catalyst for removing organic chlorine compounds and preparing method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100377886B1 (en) * 1998-12-16 2003-07-16 삼성엔지니어링 주식회사 Catalyst for removing organic chlorine compounds and preparing method thereof

Also Published As

Publication number Publication date
KR960000270B1 (en) 1996-01-04

Similar Documents

Publication Publication Date Title
JP2573453B2 (en) Optical head for recording and / or reading data on a data carrier
EP0351953A3 (en) Optical head with a tilt correction servo mechanism
KR830008290A (en) Signal Detection Method in Optical Information Reproduction Device
JPS618744A (en) Focus error detector of optical disc device
US5004326A (en) Magneto-optical information reproducing apparatus having a polarizing beam splitter disposed with an inclination of 45 degrees
KR950004127A (en) Optical pickup device for magneto-optical disk
KR940006092A (en) Optical information playback device
JPH0478029A (en) Optical information recording and reproducing device
KR950004139A (en) Optical pickup device for magneto-optical disk
JPS6329337B2 (en)
JP2604353B2 (en) Spot position error detection system for optical pickup
JP2857245B2 (en) Optical pickup device
JP2643555B2 (en) Optical information recording / reproducing device
JP2659239B2 (en) Light head
JP2523469B2 (en) Optical recording / playback head
KR960007900B1 (en) Optical pick-up
JPS618746A (en) Tracking error detector of optical disk device
KR960035484A (en) Optical pickup with dual focusing
JP2636659B2 (en) Focusing error detector
JP2748052B2 (en) Light separation element and light receiving optical device using the same
KR19980050653A (en) Optical pickup device for different optical discs
JP2812764B2 (en) Optical head for optical disk device
KR960035482A (en) Optical pickup device capable of multiple focusing
JPS641858B2 (en)
KR940022435A (en) Optical pickup system

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
G160 Decision to publish patent application
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 20061220

Year of fee payment: 12

LAPS Lapse due to unpaid annual fee