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KR980004443A - Dual beam splitter and ultra-thin optical pickup device using same - Google Patents

Dual beam splitter and ultra-thin optical pickup device using same Download PDF

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Publication number
KR980004443A
KR980004443A KR1019960021343A KR19960021343A KR980004443A KR 980004443 A KR980004443 A KR 980004443A KR 1019960021343 A KR1019960021343 A KR 1019960021343A KR 19960021343 A KR19960021343 A KR 19960021343A KR 980004443 A KR980004443 A KR 980004443A
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South Korea
Prior art keywords
light beam
surface portion
light
reflecting
beam splitter
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KR1019960021343A
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Korean (ko)
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KR100230542B1 (en
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김영식
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구자홍
Lg 전자주식회사
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    • 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
    • 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
    • G11B7/1365—Separate or integrated refractive elements, e.g. wave plates

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

Abstract

본 발명은 광빔의 편광형태가 다른 광빔들을 상이한 각도로 반사시키는 이중 빔 스프리터와 이를 이용한 초박형 광픽업 장치에 관한 것이다.The present invention relates to a dual beam splitter for reflecting light beams having different polarization patterns of light beams at different angles and an ultra-thin optical pickup device using the same.

상기 이중 빔 스프리터는 입사 광빔을 그 편광형태에 따라 선택적으로 투과및 반사시키는 제1 반사면부와 제1 반사면부를 투과한 광빔을 제1 반사면부와는 다른 각도로 반사시키는 제2 반사면부로 구성된다.The dual beam splitter includes a first reflecting surface portion for selectively transmitting and reflecting an incident light beam according to its polarization form, and a second reflecting surface portion for reflecting the light beam transmitted through the first reflecting surface portion at a different angle from the first reflecting surface portion. do.

상기 초박형 광픽업 장치는 상기 이중 빔 스프리터에 의해 광원으로부터의 광빔을 광디스크쪽으로 반사시키고 광디스크로부터의 반사 광빔이 광원과 나란하게 배열된 광검출기쪽으로 진행하도록 반사시켜 광학부품의 소요량 및 점유 공간을 최소화한다.The ultra-thin optical pickup device reflects the light beam from the light source to the optical disk by the dual beam splitter and reflects the reflected light beam from the optical disk to the photodetector arranged in parallel with the light source to minimize the requirements and occupied space of the optical component. .

Description

이중 빔 스프리터 및 그를 이용한 초박형 광픽업 장치Dual beam splitter and ultra-thin optical pickup device using same

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

제1도는 종래의 초박형 광픽업장치의 윤곽을 개략적으로 나타내는 도면.1 is a view schematically showing the outline of a conventional ultra-thin optical pickup device.

제2도는 본 발명의 제1실시예에 따른 이중 빔 스프리터를 도시하는 단면도.2 is a sectional view showing a double beam splitter according to the first embodiment of the present invention.

제3도는 본 발명의 제2실시예에 따른 이중 빔 스프리터를 도시하는 도면.3 shows a dual beam splitter according to a second embodiment of the invention.

제4도는 본 발명의 제1실시예에 따른 초박형 광픽업 장치의 윤곽을 나타내는 도면.4 is a view showing the outline of an ultra-thin optical pickup device according to a first embodiment of the present invention.

Claims (7)

제1 프리즘의 경사면에 형성되어 상기 제1 프리즘을 통해 입사되는 광빔을 그 편광형태에 따라 선택적으로 투과및 반사시키는 제1 반사면부와, 상기 제1 반사면부로 부착되고 상기 제1 반사면부와는 다른 각도로 경사진 밑면을 갖는 제2 프리즘과, 상기 제2 프리즘의 밑면에 형성되어 상기 제1 반사면부를 투과한 광빔을 제1 반사면부와는 다른 각도로 반사시키는 제2 반사면부를 구비한 것을 특징으로 하는 이중빔 스프리터.A first reflective surface portion formed on an inclined surface of the first prism and selectively transmitting and reflecting a light beam incident through the first prism according to the polarization form, and attached to the first reflective surface portion, A second prism having a bottom surface inclined at a different angle, and a second reflecting surface portion formed at the bottom of the second prism to reflect the light beam passing through the first reflecting surface portion at a different angle from the first reflecting surface portion; Double beam splitter, characterized in that. 제1항에 있어서, 상기 제1 및 제2 반사면부가 MGF2 및 TIO2를 교번적으로 코팅함에 의하여 형성된 것을 특징으로 하는 이중 빔 스프리터.The dual beam splitter according to claim 1, wherein the first and second reflecting surfaces are formed by alternately coating MGF2 and TIO2. 제1항에 있어서, 상기 제1 반사면부는 s편광의 선편광빔을 반사시키고, 상기 제2 반사면부는 p파의 선평광빔을 반사하도록 한 것을 특징으로 하는 이중 빔 스프리터.The dual beam splitter according to claim 1, wherein the first reflecting surface portion reflects a linearly polarized beam of s-polarized light, and the second reflecting surface portion reflects a linearly linear light beam of p-waves. 제2항에 있어서 상기 제1 프리즘의 상부에 설치되어 제1 반사면부쪽으로 입사될 상기 원편광빔을 p파의 선편광빔으로 변환시키는 편광변화수단을 추가로 구비한것을 특징으로 하는 이중 빔 스프리터.The dual beam splitter according to claim 2, further comprising polarization changing means installed on the first prism to convert the circularly polarized beam to be incident to the first reflective surface portion into a p-wave linearly polarized beam. 광디스크에 조사될 제1 광빔을 발생하는 광원과, 광디스크에 조사될 제1 광빔을 집속하는 대물렌즈와, 광디스크에 의하여 반사된 제2 광빔을 검출하기 위해 상기 광원과 나란하게 배열된 광검출기와, 상기 광원으로부터의 상기 제1 광빔이 상기 대물렌즈를 거쳐 상기 광디스크에 조사되도록 반사시키고, 상기 광디스크로부터 상기 대물렌즈를 거쳐 입사되는 상기 제2 광빔을 제3 광빔으로 변환하고, 제3광빔을 상기 제3 광빔이 제1 광빔의 반사각도와는 다른 각도로 반사시켜 상기 광검출기쪽으로 진행하도록 하는 이중 빔 스프리터를 구비한 것을 특징으로 하는 광픽업장치.A light source for generating a first light beam to be irradiated to the optical disc, an objective lens for focusing the first light beam to be irradiated to the optical disc, and a photodetector arranged in parallel with the light source to detect a second light beam reflected by the optical disc; Reflects the first light beam from the light source to be irradiated to the optical disk via the objective lens, converts the second light beam incident from the optical disk through the objective lens into a third light beam, and converts the third light beam to the third light beam; And a double beam splitter for reflecting the light beam at an angle different from the reflection angle of the first light beam and traveling toward the photodetector. 제5항에 있어서, 상기 제1 광빔이 에너지가 비교적 큰 s편광의 선편광빔이고, 상기 제3광빔이 p파의 선편광빔인 것을 특징으로 하는 광픽업 장치.The optical pickup apparatus of claim 5, wherein the first light beam is an s-polarized linearly polarized beam having a relatively high energy, and the third light beam is a p-polarized linearly polarized beam. 제5항에 있어서,상기 광원, 광검출기, 대물렌즈 및 이중 빔 스프리터 일체를 구동하여 트래킹 및 포커스를 조절하는 액츄에이터를 추가로 구비한 것을 특징으로 하는 광픽업 장치.The optical pickup apparatus of claim 5, further comprising an actuator for controlling tracking and focus by driving the light source, the photodetector, the objective lens, and the dual beam splitter. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019960021343A 1996-06-14 1996-06-14 Thining optical pickup using dual beam splitter Expired - Fee Related KR100230542B1 (en)

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KR1019960021343A KR100230542B1 (en) 1996-06-14 1996-06-14 Thining optical pickup using dual beam splitter

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Application Number Priority Date Filing Date Title
KR1019960021343A KR100230542B1 (en) 1996-06-14 1996-06-14 Thining optical pickup using dual beam splitter

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KR980004443A true KR980004443A (en) 1998-03-30
KR100230542B1 KR100230542B1 (en) 1999-11-15

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100421009B1 (en) * 2001-07-20 2004-03-04 삼성전자주식회사 Optical element for aligning optic axes and compensating chromatic aberration and Optical pickup apparatus comprising the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100421009B1 (en) * 2001-07-20 2004-03-04 삼성전자주식회사 Optical element for aligning optic axes and compensating chromatic aberration and Optical pickup apparatus comprising the same

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